./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.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 6908dde5 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/hard-ll_valuebound100.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 e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 --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-6908dde-m [2024-09-24 23:46:48,701 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:46:48,762 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:46:48,766 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:46:48,768 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:46:48,790 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:46:48,792 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:46:48,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:46:48,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:46:48,797 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:46:48,797 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:46:48,798 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:46:48,798 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:46:48,798 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:46:48,798 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:46:48,799 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:46:48,799 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:46:48,799 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:46:48,799 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:46:48,799 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:46:48,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:46:48,800 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:46:48,800 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:46:48,800 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:46:48,800 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:46:48,801 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:46:48,801 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:46:48,801 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:46:48,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:46:48,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:46:48,802 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:46:48,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:46:48,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:46:48,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:46:48,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:46:48,803 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:46:48,803 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:46:48,803 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:46:48,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:46:48,803 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:46:48,804 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:46:48,804 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:46:48,804 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3523bc8254ad35e64aad06fd6e3c84672a9aa19521e18482795d6584edb45d0 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:46:49,003 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:46:49,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:46:49,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:46:49,032 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:46:49,035 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:46:49,036 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2024-09-24 23:46:50,377 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:46:50,522 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:46:50,523 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound100.c [2024-09-24 23:46:50,532 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8f38ef480/06f998e2020742abae22571fbdd61fb6/FLAG0603cae00 [2024-09-24 23:46:50,934 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8f38ef480/06f998e2020742abae22571fbdd61fb6 [2024-09-24 23:46:50,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:46:50,937 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:46:50,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:46:50,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:46:50,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:46:50,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:46:50" (1/1) ... [2024-09-24 23:46:50,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5885c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:50, skipping insertion in model container [2024-09-24 23:46:50,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:46:50" (1/1) ... [2024-09-24 23:46:50,959 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:46:51,096 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-ll_valuebound100.c[538,551] [2024-09-24 23:46:51,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:46:51,126 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:46:51,135 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-ll_valuebound100.c[538,551] [2024-09-24 23:46:51,142 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:46:51,157 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:46:51,158 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51 WrapperNode [2024-09-24 23:46:51,159 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:46:51,160 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:46:51,160 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:46:51,160 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:46:51,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,208 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,221 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:46:51,222 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:46:51,223 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:46:51,226 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:46:51,226 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:46:51,264 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,269 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,284 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]. [2024-09-24 23:46:51,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,286 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,289 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,293 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,294 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,299 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,300 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:46:51,301 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:46:51,301 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:46:51,301 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:46:51,301 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (1/1) ... [2024-09-24 23:46:51,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:46:51,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:51,340 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) [2024-09-24 23:46:51,347 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 [2024-09-24 23:46:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:46:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-24 23:46:51,387 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-24 23:46:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:46:51,387 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:46:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:46:51,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:46:51,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:46:51,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:46:51,390 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:46:51,390 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:46:51,390 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:46:51,448 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:46:51,451 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:46:51,602 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-24 23:46:51,602 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:46:51,622 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:46:51,623 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-24 23:46:51,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:46:51 BoogieIcfgContainer [2024-09-24 23:46:51,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:46:51,626 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:46:51,626 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:46:51,628 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:46:51,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:46:50" (1/3) ... [2024-09-24 23:46:51,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2d0a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:46:51, skipping insertion in model container [2024-09-24 23:46:51,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:46:51" (2/3) ... [2024-09-24 23:46:51,630 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d2d0a39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:46:51, skipping insertion in model container [2024-09-24 23:46:51,630 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:46:51" (3/3) ... [2024-09-24 23:46:51,631 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound100.c [2024-09-24 23:46:51,643 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:46:51,643 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:46:51,693 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:46:51,699 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;@c30d8cd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:46:51,700 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:46:51,704 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) [2024-09-24 23:46:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 23:46:51,711 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:51,712 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] [2024-09-24 23:46:51,712 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:51,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:51,717 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-24 23:46:51,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:51,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183383458] [2024-09-24 23:46:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:51,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:51,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:46:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:51,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:46:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:51,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:46:51,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:51,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:46:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:46:51,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183383458] [2024-09-24 23:46:51,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183383458] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:46:51,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:46:51,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:46:51,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649609427] [2024-09-24 23:46:51,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:51,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:46:51,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:51,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:46:51,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:46:51,939 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) [2024-09-24 23:46:51,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:51,964 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-24 23:46:51,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:46:51,966 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 [2024-09-24 23:46:51,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:51,975 INFO L225 Difference]: With dead ends: 66 [2024-09-24 23:46:51,976 INFO L226 Difference]: Without dead ends: 32 [2024-09-24 23:46:51,979 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 [2024-09-24 23:46:51,981 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 [2024-09-24 23:46:51,982 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] [2024-09-24 23:46:51,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-24 23:46:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-24 23:46:52,012 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) [2024-09-24 23:46:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-24 23:46:52,014 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-24 23:46:52,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:52,014 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-24 23:46:52,015 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) [2024-09-24 23:46:52,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,015 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-24 23:46:52,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 23:46:52,016 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:52,016 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] [2024-09-24 23:46:52,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:46:52,017 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:52,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,017 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-24 23:46:52,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:52,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343672057] [2024-09-24 23:46:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:46:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:46:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:46:52,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:46:52,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:46:52,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:52,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343672057] [2024-09-24 23:46:52,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343672057] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:46:52,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:46:52,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:46:52,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010187759] [2024-09-24 23:46:52,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:52,198 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:46:52,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:52,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:46:52,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:46:52,204 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) [2024-09-24 23:46:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:52,289 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-24 23:46:52,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:46:52,290 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 [2024-09-24 23:46:52,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:52,291 INFO L225 Difference]: With dead ends: 45 [2024-09-24 23:46:52,291 INFO L226 Difference]: Without dead ends: 43 [2024-09-24 23:46:52,292 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 [2024-09-24 23:46:52,294 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:52,295 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:46:52,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-24 23:46:52,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-24 23:46:52,309 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) [2024-09-24 23:46:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-24 23:46:52,311 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-24 23:46:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:52,311 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-24 23:46:52,312 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) [2024-09-24 23:46:52,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,316 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-24 23:46:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:46:52,317 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:52,317 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] [2024-09-24 23:46:52,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:46:52,317 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:52,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,318 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-24 23:46:52,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:52,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962829095] [2024-09-24 23:46:52,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:52,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:52,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:46:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:46:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:46:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:46:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:46:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:46:52,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:52,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962829095] [2024-09-24 23:46:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962829095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:46:52,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:46:52,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:46:52,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054386169] [2024-09-24 23:46:52,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:52,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:46:52,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:52,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:46:52,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:46:52,500 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) [2024-09-24 23:46:52,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:52,582 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-24 23:46:52,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:46:52,583 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 [2024-09-24 23:46:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:52,584 INFO L225 Difference]: With dead ends: 49 [2024-09-24 23:46:52,588 INFO L226 Difference]: Without dead ends: 47 [2024-09-24 23:46:52,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:46:52,589 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 [2024-09-24 23:46:52,589 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] [2024-09-24 23:46:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-24 23:46:52,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-24 23:46:52,601 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) [2024-09-24 23:46:52,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-24 23:46:52,605 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-24 23:46:52,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:52,606 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-24 23:46:52,606 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) [2024-09-24 23:46:52,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,607 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-24 23:46:52,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-24 23:46:52,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:52,609 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] [2024-09-24 23:46:52,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:46:52,610 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:52,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-24 23:46:52,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:52,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789472640] [2024-09-24 23:46:52,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:52,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:46:52,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590556051] [2024-09-24 23:46:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:52,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:52,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:52,647 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) [2024-09-24 23:46:52,648 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:46:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:52,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:46:52,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:46:52,815 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:46:52,815 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:46:52,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:52,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789472640] [2024-09-24 23:46:52,816 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:46:52,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590556051] [2024-09-24 23:46:52,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590556051] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:46:52,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:46:52,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:46:52,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877721883] [2024-09-24 23:46:52,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:52,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:46:52,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:52,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:46:52,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:46:52,819 INFO L87 Difference]: Start difference. First operand 40 states and 48 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) [2024-09-24 23:46:52,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:52,883 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-24 23:46:52,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:46:52,883 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 [2024-09-24 23:46:52,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:52,885 INFO L225 Difference]: With dead ends: 66 [2024-09-24 23:46:52,885 INFO L226 Difference]: Without dead ends: 53 [2024-09-24 23:46:52,885 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 [2024-09-24 23:46:52,886 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:52,887 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:46:52,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-24 23:46:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-24 23:46:52,900 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) [2024-09-24 23:46:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-24 23:46:52,901 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-24 23:46:52,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:52,902 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-24 23:46:52,902 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) [2024-09-24 23:46:52,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:52,905 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-24 23:46:52,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:46:52,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:52,906 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] [2024-09-24 23:46:52,921 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:46:53,110 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 [2024-09-24 23:46:53,111 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:53,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:53,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-24 23:46:53,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:53,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072617917] [2024-09-24 23:46:53,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:53,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:46:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1471973653] [2024-09-24 23:46:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:53,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:53,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:53,138 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) [2024-09-24 23:46:53,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:46:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:53,188 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-24 23:46:53,190 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:46:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:46:53,306 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:46:53,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:46:53,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:53,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072617917] [2024-09-24 23:46:53,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:46:53,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471973653] [2024-09-24 23:46:53,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471973653] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:46:53,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:46:53,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-24 23:46:53,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32801143] [2024-09-24 23:46:53,504 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:46:53,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:46:53,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:53,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:46:53,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:46:53,506 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-24 23:46:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:53,621 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-24 23:46:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:46:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-24 23:46:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:53,625 INFO L225 Difference]: With dead ends: 68 [2024-09-24 23:46:53,627 INFO L226 Difference]: Without dead ends: 66 [2024-09-24 23:46:53,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:46:53,628 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:53,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:46:53,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-24 23:46:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-24 23:46:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:46:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-24 23:46:53,647 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-24 23:46:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:53,647 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-24 23:46:53,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-24 23:46:53,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-24 23:46:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-24 23:46:53,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:53,649 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] [2024-09-24 23:46:53,667 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:46:53,853 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 [2024-09-24 23:46:53,854 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:53,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-24 23:46:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:53,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029902253] [2024-09-24 23:46:53,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:46:53,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440972263] [2024-09-24 23:46:53,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:53,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:53,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:53,880 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) [2024-09-24 23:46:53,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:46:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:53,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:46:53,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:46:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-24 23:46:54,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:46:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-24 23:46:54,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:54,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029902253] [2024-09-24 23:46:54,120 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:46:54,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440972263] [2024-09-24 23:46:54,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440972263] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:46:54,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:46:54,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-24 23:46:54,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563032755] [2024-09-24 23:46:54,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:54,121 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:46:54,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:54,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:46:54,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:46:54,122 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-24 23:46:54,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:54,184 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-24 23:46:54,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:46:54,185 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 54 [2024-09-24 23:46:54,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:54,186 INFO L225 Difference]: With dead ends: 73 [2024-09-24 23:46:54,186 INFO L226 Difference]: Without dead ends: 71 [2024-09-24 23:46:54,187 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:46:54,187 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:54,187 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:46:54,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-24 23:46:54,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-24 23:46:54,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-24 23:46:54,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-24 23:46:54,242 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-24 23:46:54,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:54,242 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-24 23:46:54,242 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-24 23:46:54,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:54,243 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-24 23:46:54,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-24 23:46:54,245 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:54,245 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:46:54,261 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:46:54,449 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 [2024-09-24 23:46:54,450 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:54,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-24 23:46:54,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:54,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890642447] [2024-09-24 23:46:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:54,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:46:54,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:46:54,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:46:54,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:46:54,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:46:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:46:54,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:46:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:46:54,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:46:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-24 23:46:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,599 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-24 23:46:54,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:54,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890642447] [2024-09-24 23:46:54,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890642447] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:46:54,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:46:54,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:46:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976799486] [2024-09-24 23:46:54,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:46:54,604 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:46:54,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:54,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:46:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:46:54,605 INFO L87 Difference]: Start difference. First operand 70 states and 88 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-24 23:46:54,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:54,664 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-24 23:46:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:46:54,665 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-24 23:46:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:54,666 INFO L225 Difference]: With dead ends: 78 [2024-09-24 23:46:54,666 INFO L226 Difference]: Without dead ends: 66 [2024-09-24 23:46:54,666 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:46:54,667 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:54,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:46:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-24 23:46:54,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-24 23:46:54,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-24 23:46:54,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-24 23:46:54,680 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-24 23:46:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:54,681 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-24 23:46:54,681 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, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-24 23:46:54,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:54,681 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-24 23:46:54,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-24 23:46:54,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:54,683 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] [2024-09-24 23:46:54,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-24 23:46:54,683 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:54,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:54,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-24 23:46:54,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:54,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316526857] [2024-09-24 23:46:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:54,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:46:54,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1615597795] [2024-09-24 23:46:54,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:54,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:54,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:54,712 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) [2024-09-24 23:46:54,713 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:46:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:54,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-24 23:46:54,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:46:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-24 23:46:55,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:46:57,049 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-24 23:46:57,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316526857] [2024-09-24 23:46:57,049 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:46:57,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615597795] [2024-09-24 23:46:57,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615597795] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:46:57,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:46:57,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-24 23:46:57,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519511979] [2024-09-24 23:46:57,050 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:46:57,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-24 23:46:57,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:57,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-24 23:46:57,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-24 23:46:57,052 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-24 23:46:58,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:58,338 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-24 23:46:58,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-24 23:46:58,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-24 23:46:58,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:58,341 INFO L225 Difference]: With dead ends: 153 [2024-09-24 23:46:58,341 INFO L226 Difference]: Without dead ends: 130 [2024-09-24 23:46:58,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:46:58,342 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:58,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:46:58,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-24 23:46:58,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-24 23:46:58,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-24 23:46:58,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-24 23:46:58,370 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-24 23:46:58,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:46:58,370 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-24 23:46:58,371 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-24 23:46:58,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:58,371 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-24 23:46:58,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-24 23:46:58,372 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:46:58,372 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 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] [2024-09-24 23:46:58,390 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:46:58,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:58,573 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:46:58,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:46:58,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-24 23:46:58,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:46:58,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699249914] [2024-09-24 23:46:58,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:58,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:46:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:46:58,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887625120] [2024-09-24 23:46:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:46:58,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:46:58,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:46:58,604 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) [2024-09-24 23:46:58,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:46:58,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:46:58,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-24 23:46:58,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:46:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-24 23:46:59,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:46:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-24 23:46:59,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:46:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699249914] [2024-09-24 23:46:59,522 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:46:59,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887625120] [2024-09-24 23:46:59,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887625120] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:46:59,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:46:59,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-24 23:46:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360439379] [2024-09-24 23:46:59,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:46:59,523 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:46:59,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:46:59,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:46:59,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:46:59,526 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-24 23:46:59,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:46:59,993 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-24 23:46:59,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:46:59,993 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-24 23:46:59,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:46:59,994 INFO L225 Difference]: With dead ends: 145 [2024-09-24 23:46:59,994 INFO L226 Difference]: Without dead ends: 111 [2024-09-24 23:46:59,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:46:59,995 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:46:59,996 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:46:59,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-24 23:47:00,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-24 23:47:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-24 23:47:00,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-24 23:47:00,018 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-24 23:47:00,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:00,019 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-24 23:47:00,019 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-24 23:47:00,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:00,019 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-24 23:47:00,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-24 23:47:00,023 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:00,023 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2024-09-24 23:47:00,037 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-24 23:47:00,223 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:00,224 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-24 23:47:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:00,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368150214] [2024-09-24 23:47:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:47:00,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:47:00,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:47:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:47:00,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:47:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:47:00,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:47:00,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:47:00,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:47:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:47:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:47:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:47:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 23:47:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-24 23:47:00,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-24 23:47:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368150214] [2024-09-24 23:47:00,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368150214] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:47:00,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289266660] [2024-09-24 23:47:00,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:47:00,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:00,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:00,406 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) [2024-09-24 23:47:00,407 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:47:00,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:47:00,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:00,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:47:00,452 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:00,484 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-24 23:47:00,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-24 23:47:00,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289266660] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:00,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:47:00,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-24 23:47:00,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765973530] [2024-09-24 23:47:00,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:00,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:47:00,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:00,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:47:00,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:47:00,558 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-24 23:47:00,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:00,611 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-24 23:47:00,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:47:00,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-24 23:47:00,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:00,612 INFO L225 Difference]: With dead ends: 124 [2024-09-24 23:47:00,613 INFO L226 Difference]: Without dead ends: 102 [2024-09-24 23:47:00,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:47:00,613 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:00,614 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:47:00,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-24 23:47:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-24 23:47:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-24 23:47:00,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-24 23:47:00,637 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-24 23:47:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:00,638 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-24 23:47:00,638 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-24 23:47:00,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-24 23:47:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-24 23:47:00,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:00,639 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 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, 1] [2024-09-24 23:47:00,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:47:00,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:47:00,840 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:00,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:00,841 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-24 23:47:00,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:00,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434862527] [2024-09-24 23:47:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:00,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:47:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:47:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:47:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:47:01,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:47:01,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:47:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:47:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:47:01,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:47:01,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:47:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:47:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:47:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-24 23:47:01,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-24 23:47:01,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-24 23:47:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-24 23:47:01,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:01,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434862527] [2024-09-24 23:47:01,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434862527] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:47:01,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758632394] [2024-09-24 23:47:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:01,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:01,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:01,093 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) [2024-09-24 23:47:01,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:47:01,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:01,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-24 23:47:01,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:01,361 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-24 23:47:01,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-24 23:47:01,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758632394] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:01,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:47:01,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-24 23:47:01,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516046412] [2024-09-24 23:47:01,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:01,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:47:01,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:01,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:47:01,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:47:01,621 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-24 23:47:01,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:01,901 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-24 23:47:01,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-24 23:47:01,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-24 23:47:01,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:01,903 INFO L225 Difference]: With dead ends: 117 [2024-09-24 23:47:01,903 INFO L226 Difference]: Without dead ends: 100 [2024-09-24 23:47:01,903 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:47:01,903 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:01,904 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:47:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-24 23:47:01,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-24 23:47:01,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-24 23:47:01,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-24 23:47:01,934 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-24 23:47:01,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:01,934 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-24 23:47:01,934 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-24 23:47:01,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:01,935 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-24 23:47:01,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-24 23:47:01,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:01,935 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1] [2024-09-24 23:47:01,949 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:47:02,139 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:02,139 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:02,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:02,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-24 23:47:02,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:02,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395806447] [2024-09-24 23:47:02,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:02,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:02,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:47:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:47:02,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:47:02,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:47:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:47:02,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:47:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:47:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:47:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:47:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:47:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:47:02,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,236 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:47:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:47:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-24 23:47:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-24 23:47:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-24 23:47:02,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,245 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-24 23:47:02,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:02,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395806447] [2024-09-24 23:47:02,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395806447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:47:02,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385513485] [2024-09-24 23:47:02,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:02,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:02,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:02,247 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) [2024-09-24 23:47:02,248 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:47:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:02,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-24 23:47:02,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:02,312 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-24 23:47:02,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-24 23:47:02,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385513485] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:47:02,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-24 23:47:02,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-24 23:47:02,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006006980] [2024-09-24 23:47:02,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:47:02,313 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:47:02,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:02,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:47:02,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:47:02,313 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-24 23:47:02,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:02,360 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-24 23:47:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:47:02,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-24 23:47:02,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:02,361 INFO L225 Difference]: With dead ends: 100 [2024-09-24 23:47:02,362 INFO L226 Difference]: Without dead ends: 88 [2024-09-24 23:47:02,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:47:02,362 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:02,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:47:02,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-24 23:47:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-24 23:47:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-24 23:47:02,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-24 23:47:02,379 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-24 23:47:02,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:02,379 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-24 23:47:02,379 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-24 23:47:02,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-24 23:47:02,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-24 23:47:02,380 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:02,380 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2024-09-24 23:47:02,395 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:47:02,580 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:02,581 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:02,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:02,582 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-24 23:47:02,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:02,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917507248] [2024-09-24 23:47:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:02,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:47:02,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796821180] [2024-09-24 23:47:02,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:47:02,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:02,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:02,605 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) [2024-09-24 23:47:02,612 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:47:03,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:47:03,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:03,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-24 23:47:03,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-24 23:47:04,165 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:18,864 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-24 23:47:18,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917507248] [2024-09-24 23:47:18,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:47:18,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796821180] [2024-09-24 23:47:18,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796821180] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:18,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:47:18,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-24 23:47:18,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372718091] [2024-09-24 23:47:18,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:18,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:47:18,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:18,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:47:18,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:47:18,867 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-24 23:47:24,221 WARN L293 SmtUtils]: Spent 5.11s on a formula simplification. DAG size of input: 174 DAG size of output: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:47:27,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:27,660 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-24 23:47:27,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:47:27,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 104 [2024-09-24 23:47:27,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:27,662 INFO L225 Difference]: With dead ends: 162 [2024-09-24 23:47:27,662 INFO L226 Difference]: Without dead ends: 140 [2024-09-24 23:47:27,662 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:47:27,662 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:27,663 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 433 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-24 23:47:27,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-24 23:47:27,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2024-09-24 23:47:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 38 states have call successors, (38), 15 states have call predecessors, (38), 14 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-24 23:47:27,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2024-09-24 23:47:27,694 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 104 [2024-09-24 23:47:27,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:27,695 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2024-09-24 23:47:27,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-24 23:47:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2024-09-24 23:47:27,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-24 23:47:27,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:27,696 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:47:27,704 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:47:27,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-24 23:47:27,901 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:27,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:27,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-24 23:47:27,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:27,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698260504] [2024-09-24 23:47:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:27,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:47:27,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1639483854] [2024-09-24 23:47:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:47:27,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:27,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:47:27,950 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:47:28,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:47:28,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:28,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-24 23:47:28,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-24 23:47:28,160 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-24 23:47:28,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698260504] [2024-09-24 23:47:28,323 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:47:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639483854] [2024-09-24 23:47:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639483854] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:28,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:47:28,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-24 23:47:28,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560667663] [2024-09-24 23:47:28,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:28,324 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-24 23:47:28,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-24 23:47:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:47:28,325 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:47:28,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:28,837 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2024-09-24 23:47:28,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-24 23:47:28,838 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-24 23:47:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:28,840 INFO L225 Difference]: With dead ends: 142 [2024-09-24 23:47:28,840 INFO L226 Difference]: Without dead ends: 140 [2024-09-24 23:47:28,841 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:47:28,841 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:28,842 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:47:28,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-24 23:47:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-09-24 23:47:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 88 states have internal predecessors, (93), 38 states have call successors, (38), 18 states have call predecessors, (38), 17 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-24 23:47:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-24 23:47:28,903 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 115 [2024-09-24 23:47:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:28,903 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-24 23:47:28,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-24 23:47:28,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:28,904 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-24 23:47:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-24 23:47:28,906 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:28,907 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:47:28,919 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 23:47:29,107 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:47:29,108 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:29,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:29,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-24 23:47:29,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:29,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956148287] [2024-09-24 23:47:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:29,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:29,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:47:29,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:47:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:47:29,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:47:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:47:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:47:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:47:29,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:47:29,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:47:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:47:29,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:47:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:47:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:47:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-24 23:47:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-24 23:47:29,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-24 23:47:29,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-24 23:47:29,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-24 23:47:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-24 23:47:29,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:29,353 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-24 23:47:29,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956148287] [2024-09-24 23:47:29,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956148287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:47:29,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442061839] [2024-09-24 23:47:29,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:47:29,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:29,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:29,356 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:47:29,357 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:47:29,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:47:29,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:29,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:47:29,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:29,435 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-24 23:47:29,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:29,543 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-24 23:47:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442061839] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:29,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:47:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-24 23:47:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102728683] [2024-09-24 23:47:29,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:29,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-24 23:47:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:29,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-24 23:47:29,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:47:29,544 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-24 23:47:29,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:29,640 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2024-09-24 23:47:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:47:29,641 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-24 23:47:29,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:29,642 INFO L225 Difference]: With dead ends: 167 [2024-09-24 23:47:29,642 INFO L226 Difference]: Without dead ends: 144 [2024-09-24 23:47:29,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:47:29,643 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:29,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:47:29,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-24 23:47:29,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-24 23:47:29,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-24 23:47:29,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-24 23:47:29,690 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-24 23:47:29,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:29,691 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-24 23:47:29,691 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-24 23:47:29,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:29,691 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-24 23:47:29,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-24 23:47:29,692 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:29,692 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:47:29,707 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:47:29,892 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:47:29,892 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:29,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:29,893 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-24 23:47:29,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:29,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46533380] [2024-09-24 23:47:29,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:29,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:47:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-24 23:47:30,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-24 23:47:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-24 23:47:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-24 23:47:30,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-24 23:47:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-24 23:47:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-24 23:47:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-24 23:47:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-24 23:47:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-24 23:47:30,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-24 23:47:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-24 23:47:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-24 23:47:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-24 23:47:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-24 23:47:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-24 23:47:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-24 23:47:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-24 23:47:30,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-24 23:47:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:47:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-24 23:47:30,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:47:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46533380] [2024-09-24 23:47:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46533380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:47:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742582906] [2024-09-24 23:47:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:47:30,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:30,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:30,246 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:47:30,247 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:47:30,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:47:30,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:30,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-24 23:47:30,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-24 23:47:30,737 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:47:31,559 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-24 23:47:31,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742582906] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:47:31,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:47:31,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-24 23:47:31,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958451735] [2024-09-24 23:47:31,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:47:31,560 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:47:31,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:47:31,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:47:31,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:47:31,561 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-24 23:47:32,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:47:32,104 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-24 23:47:32,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-24 23:47:32,105 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-24 23:47:32,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:47:32,106 INFO L225 Difference]: With dead ends: 158 [2024-09-24 23:47:32,106 INFO L226 Difference]: Without dead ends: 130 [2024-09-24 23:47:32,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:47:32,107 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:47:32,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 530 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:47:32,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-24 23:47:32,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-24 23:47:32,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-24 23:47:32,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-24 23:47:32,138 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-24 23:47:32,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:47:32,139 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-24 23:47:32,139 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-24 23:47:32,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:32,139 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-24 23:47:32,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-24 23:47:32,140 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:47:32,140 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:47:32,153 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:47:32,344 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:47:32,345 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:47:32,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:47:32,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-24 23:47:32,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:47:32,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798467935] [2024-09-24 23:47:32,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:47:32,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:47:32,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-24 23:47:32,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147642329] [2024-09-24 23:47:32,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:47:32,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:47:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:47:32,388 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:47:32,391 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:47:32,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-24 23:47:32,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:47:32,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-24 23:47:32,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:47:33,169 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-24 23:47:33,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:48:21,681 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-24 23:48:43,724 WARN L293 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 115 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:49:02,803 WARN L293 SmtUtils]: Spent 10.14s on a formula simplification that was a NOOP. DAG size: 242 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:50:11,533 WARN L293 SmtUtils]: Spent 12.97s on a formula simplification that was a NOOP. DAG size: 244 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:51:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-24 23:51:07,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:51:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798467935] [2024-09-24 23:51:07,781 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-24 23:51:07,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147642329] [2024-09-24 23:51:07,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147642329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:51:07,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:51:07,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2024-09-24 23:51:07,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875999950] [2024-09-24 23:51:07,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-24 23:51:07,782 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-24 23:51:07,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:51:07,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-24 23:51:07,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=805, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:51:07,783 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 29 states have internal predecessors, (57), 19 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) [2024-09-24 23:51:22,925 WARN L293 SmtUtils]: Spent 12.14s on a formula simplification. DAG size of input: 432 DAG size of output: 51 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-24 23:51:23,960 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []