./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-acceleration/array_4.i --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 e378df2c 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/loop-acceleration/array_4.i -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 e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 --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 0.2.5-wip.dk.contract-modifies-e378df2-m [2024-10-15 14:12:45,018 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-15 14:12:45,101 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-15 14:12:45,107 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-15 14:12:45,111 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-15 14:12:45,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-15 14:12:45,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-15 14:12:45,144 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-15 14:12:45,145 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-15 14:12:45,145 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-15 14:12:45,145 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-15 14:12:45,146 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-15 14:12:45,146 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-15 14:12:45,147 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-15 14:12:45,147 INFO L153 SettingsManager]: * Use SBE=true [2024-10-15 14:12:45,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-15 14:12:45,148 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-15 14:12:45,148 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-15 14:12:45,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-15 14:12:45,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-15 14:12:45,153 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-15 14:12:45,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-15 14:12:45,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-15 14:12:45,154 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-15 14:12:45,154 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-15 14:12:45,154 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-15 14:12:45,155 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-15 14:12:45,155 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-15 14:12:45,155 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-15 14:12:45,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-15 14:12:45,155 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-15 14:12:45,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-15 14:12:45,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:12:45,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-15 14:12:45,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-15 14:12:45,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-15 14:12:45,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-15 14:12:45,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-15 14:12:45,157 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-15 14:12:45,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-15 14:12:45,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-15 14:12:45,158 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-15 14:12:45,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8c27e61ac5d5a22c0e00a5dbac1b872460567877a501387ed9d5bda89096498 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-10-15 14:12:45,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-15 14:12:45,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-15 14:12:45,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-15 14:12:45,450 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-15 14:12:45,450 INFO L274 PluginConnector]: CDTParser initialized [2024-10-15 14:12:45,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-acceleration/array_4.i [2024-10-15 14:12:46,910 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-15 14:12:47,121 INFO L384 CDTParser]: Found 1 translation units. [2024-10-15 14:12:47,122 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_4.i [2024-10-15 14:12:47,128 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2a52ab109/7a91c495f5ed4ea2a90e17a44471a971/FLAG39bf1bf27 [2024-10-15 14:12:47,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2a52ab109/7a91c495f5ed4ea2a90e17a44471a971 [2024-10-15 14:12:47,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-15 14:12:47,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-15 14:12:47,145 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-15 14:12:47,145 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-15 14:12:47,150 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-15 14:12:47,150 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,151 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ead73d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47, skipping insertion in model container [2024-10-15 14:12:47,151 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,168 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-15 14:12:47,356 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-10-15 14:12:47,372 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:12:47,383 INFO L200 MainTranslator]: Completed pre-run [2024-10-15 14:12:47,395 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-acceleration/array_4.i[848,861] [2024-10-15 14:12:47,402 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-15 14:12:47,422 INFO L204 MainTranslator]: Completed translation [2024-10-15 14:12:47,423 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47 WrapperNode [2024-10-15 14:12:47,423 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-15 14:12:47,425 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-15 14:12:47,425 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-15 14:12:47,426 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-15 14:12:47,432 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,439 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,446 INFO L138 Inliner]: procedures = 16, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-10-15 14:12:47,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-15 14:12:47,447 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-15 14:12:47,447 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-15 14:12:47,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-15 14:12:47,457 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,458 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,460 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,485 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-10-15 14:12:47,487 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,488 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,492 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,499 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,500 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,501 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,503 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-15 14:12:47,504 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-15 14:12:47,504 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-15 14:12:47,504 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-15 14:12:47,505 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (1/1) ... [2024-10-15 14:12:47,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-15 14:12:47,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:47,547 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) [2024-10-15 14:12:47,550 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 [2024-10-15 14:12:47,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-15 14:12:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-10-15 14:12:47,606 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-10-15 14:12:47,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-15 14:12:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-15 14:12:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-15 14:12:47,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-15 14:12:47,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-15 14:12:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-10-15 14:12:47,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-10-15 14:12:47,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-15 14:12:47,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-15 14:12:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-15 14:12:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-15 14:12:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-10-15 14:12:47,610 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-10-15 14:12:47,610 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-15 14:12:47,682 INFO L238 CfgBuilder]: Building ICFG [2024-10-15 14:12:47,683 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-15 14:12:47,801 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-10-15 14:12:47,802 INFO L287 CfgBuilder]: Performing block encoding [2024-10-15 14:12:47,826 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-15 14:12:47,826 INFO L314 CfgBuilder]: Removed 2 assume(true) statements. [2024-10-15 14:12:47,826 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:12:47 BoogieIcfgContainer [2024-10-15 14:12:47,826 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-15 14:12:47,829 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-15 14:12:47,829 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-15 14:12:47,834 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-15 14:12:47,834 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 02:12:47" (1/3) ... [2024-10-15 14:12:47,835 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a9cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:12:47, skipping insertion in model container [2024-10-15 14:12:47,836 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 02:12:47" (2/3) ... [2024-10-15 14:12:47,836 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8a9cd1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 02:12:47, skipping insertion in model container [2024-10-15 14:12:47,837 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 02:12:47" (3/3) ... [2024-10-15 14:12:47,838 INFO L112 eAbstractionObserver]: Analyzing ICFG array_4.i [2024-10-15 14:12:47,857 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-15 14:12:47,858 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-15 14:12:47,911 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-15 14:12:47,917 INFO L333 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;@4bd743a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-15 14:12:47,917 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-10-15 14:12:47,921 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-10-15 14:12:47,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2024-10-15 14:12:47,928 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:47,929 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:47,929 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:47,934 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:47,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1249554957, now seen corresponding path program 1 times [2024-10-15 14:12:47,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:47,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814962528] [2024-10-15 14:12:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:47,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:48,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,126 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:12:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:48,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814962528] [2024-10-15 14:12:48,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814962528] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:12:48,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:12:48,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-15 14:12:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18263457] [2024-10-15 14:12:48,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:12:48,151 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-10-15 14:12:48,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:48,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-10-15 14:12:48,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:12:48,180 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:48,210 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2024-10-15 14:12:48,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-10-15 14:12:48,213 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2024-10-15 14:12:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:48,218 INFO L225 Difference]: With dead ends: 34 [2024-10-15 14:12:48,218 INFO L226 Difference]: Without dead ends: 14 [2024-10-15 14:12:48,221 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-10-15 14:12:48,224 INFO L432 NwaCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:48,225 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:12:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-10-15 14:12:48,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-10-15 14:12:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-10-15 14:12:48,259 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2024-10-15 14:12:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:48,260 INFO L471 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-10-15 14:12:48,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,261 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:48,262 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-10-15 14:12:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-10-15 14:12:48,262 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:48,263 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:48,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-15 14:12:48,264 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:48,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:48,265 INFO L85 PathProgramCache]: Analyzing trace with hash -363770631, now seen corresponding path program 1 times [2024-10-15 14:12:48,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:48,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621811110] [2024-10-15 14:12:48,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:48,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,404 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:48,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:12:48,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:48,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621811110] [2024-10-15 14:12:48,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621811110] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:12:48,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:12:48,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-15 14:12:48,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860074847] [2024-10-15 14:12:48,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:12:48,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-15 14:12:48,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-15 14:12:48,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:12:48,420 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:48,455 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2024-10-15 14:12:48,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-15 14:12:48,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-10-15 14:12:48,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:48,458 INFO L225 Difference]: With dead ends: 26 [2024-10-15 14:12:48,459 INFO L226 Difference]: Without dead ends: 18 [2024-10-15 14:12:48,460 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-15 14:12:48,463 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:48,464 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 19 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:12:48,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-10-15 14:12:48,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 15. [2024-10-15 14:12:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2024-10-15 14:12:48,473 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2024-10-15 14:12:48,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:48,473 INFO L471 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2024-10-15 14:12:48,474 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:48,475 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2024-10-15 14:12:48,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-10-15 14:12:48,476 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:48,476 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:48,476 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-15 14:12:48,477 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:48,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash 326418081, now seen corresponding path program 1 times [2024-10-15 14:12:48,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:48,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686920025] [2024-10-15 14:12:48,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,642 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:12:48,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686920025] [2024-10-15 14:12:48,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686920025] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:12:48,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250680678] [2024-10-15 14:12:48,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:48,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:48,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:48,661 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) [2024-10-15 14:12:48,664 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-15 14:12:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:48,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-15 14:12:48,766 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:12:48,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:12:48,811 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:12:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-15 14:12:48,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250680678] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:12:48,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:12:48,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-10-15 14:12:48,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111963069] [2024-10-15 14:12:48,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:12:48,862 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-15 14:12:48,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:48,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-15 14:12:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:12:48,863 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:48,917 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2024-10-15 14:12:48,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-15 14:12:48,917 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-10-15 14:12:48,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:48,918 INFO L225 Difference]: With dead ends: 38 [2024-10-15 14:12:48,919 INFO L226 Difference]: Without dead ends: 30 [2024-10-15 14:12:48,919 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-10-15 14:12:48,920 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:48,920 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 37 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:12:48,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-10-15 14:12:48,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 18. [2024-10-15 14:12:48,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-10-15 14:12:48,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2024-10-15 14:12:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:48,926 INFO L471 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-10-15 14:12:48,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:48,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:48,927 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-10-15 14:12:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-10-15 14:12:48,927 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:48,928 INFO L215 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:48,947 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-15 14:12:49,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:49,129 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:49,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:49,129 INFO L85 PathProgramCache]: Analyzing trace with hash -797673735, now seen corresponding path program 2 times [2024-10-15 14:12:49,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:49,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334153504] [2024-10-15 14:12:49,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:49,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:49,298 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:49,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:49,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:12:49,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:49,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334153504] [2024-10-15 14:12:49,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334153504] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-15 14:12:49,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-15 14:12:49,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-15 14:12:49,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272111490] [2024-10-15 14:12:49,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-15 14:12:49,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-15 14:12:49,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:49,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-15 14:12:49,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-15 14:12:49,305 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:49,344 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-10-15 14:12:49,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-15 14:12:49,344 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-10-15 14:12:49,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:49,345 INFO L225 Difference]: With dead ends: 25 [2024-10-15 14:12:49,345 INFO L226 Difference]: Without dead ends: 20 [2024-10-15 14:12:49,345 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-15 14:12:49,346 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:49,347 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 32 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-10-15 14:12:49,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-10-15 14:12:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-10-15 14:12:49,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-10-15 14:12:49,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2024-10-15 14:12:49,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:49,353 INFO L471 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-10-15 14:12:49,353 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,356 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-10-15 14:12:49,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-10-15 14:12:49,357 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:49,357 INFO L215 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:49,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-15 14:12:49,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:49,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1935838945, now seen corresponding path program 1 times [2024-10-15 14:12:49,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:49,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745343225] [2024-10-15 14:12:49,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:49,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:49,475 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:49,479 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-10-15 14:12:49,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:49,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745343225] [2024-10-15 14:12:49,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745343225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:12:49,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300288882] [2024-10-15 14:12:49,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:49,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:49,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:49,482 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) [2024-10-15 14:12:49,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-15 14:12:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:49,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-15 14:12:49,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:12:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:12:49,586 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:12:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-15 14:12:49,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300288882] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:12:49,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:12:49,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2024-10-15 14:12:49,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373628106] [2024-10-15 14:12:49,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:12:49,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-15 14:12:49,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:49,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-15 14:12:49,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2024-10-15 14:12:49,688 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:49,812 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-10-15 14:12:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-15 14:12:49,813 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-10-15 14:12:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:49,813 INFO L225 Difference]: With dead ends: 65 [2024-10-15 14:12:49,813 INFO L226 Difference]: Without dead ends: 44 [2024-10-15 14:12:49,814 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2024-10-15 14:12:49,815 INFO L432 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:49,815 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 45 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:12:49,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-10-15 14:12:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-10-15 14:12:49,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-10-15 14:12:49,822 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 19 [2024-10-15 14:12:49,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:49,823 INFO L471 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-10-15 14:12:49,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:49,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:49,823 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-10-15 14:12:49,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-10-15 14:12:49,824 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:49,825 INFO L215 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:49,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-10-15 14:12:50,028 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:50,029 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:50,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1044490229, now seen corresponding path program 2 times [2024-10-15 14:12:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753291611] [2024-10-15 14:12:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:50,360 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:50,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:50,366 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-15 14:12:50,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:50,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753291611] [2024-10-15 14:12:50,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753291611] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:12:50,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097957214] [2024-10-15 14:12:50,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-15 14:12:50,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:50,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:50,368 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) [2024-10-15 14:12:50,370 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-15 14:12:50,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-15 14:12:50,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:12:50,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-15 14:12:50,469 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:12:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-15 14:12:50,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:12:50,766 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-15 14:12:50,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097957214] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:12:50,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:12:50,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-10-15 14:12:50,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634562880] [2024-10-15 14:12:50,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:12:50,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-10-15 14:12:50,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:50,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-10-15 14:12:50,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:12:50,769 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:50,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:50,931 INFO L93 Difference]: Finished difference Result 120 states and 145 transitions. [2024-10-15 14:12:50,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-15 14:12:50,932 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-10-15 14:12:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:50,935 INFO L225 Difference]: With dead ends: 120 [2024-10-15 14:12:50,935 INFO L226 Difference]: Without dead ends: 92 [2024-10-15 14:12:50,936 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2024-10-15 14:12:50,936 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:50,937 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 67 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-10-15 14:12:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-10-15 14:12:50,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 56. [2024-10-15 14:12:50,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-10-15 14:12:50,955 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 43 [2024-10-15 14:12:50,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:50,955 INFO L471 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-10-15 14:12:50,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:50,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-10-15 14:12:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-10-15 14:12:50,958 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:50,959 INFO L215 NwaCegarLoop]: trace histogram [22, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:50,975 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-15 14:12:51,162 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-15 14:12:51,163 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:51,164 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:51,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1085561355, now seen corresponding path program 3 times [2024-10-15 14:12:51,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:51,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129670744] [2024-10-15 14:12:51,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:51,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:51,841 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2024-10-15 14:12:51,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129670744] [2024-10-15 14:12:51,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129670744] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:12:51,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343413733] [2024-10-15 14:12:51,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-15 14:12:51,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:51,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:51,847 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) [2024-10-15 14:12:51,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-15 14:12:52,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-15 14:12:52,831 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:12:52,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-15 14:12:52,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:12:52,935 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-15 14:12:52,935 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:12:53,314 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-10-15 14:12:53,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343413733] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:12:53,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:12:53,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15, 15] total 39 [2024-10-15 14:12:53,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127777242] [2024-10-15 14:12:53,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:12:53,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-10-15 14:12:53,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:53,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-10-15 14:12:53,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=812, Unknown=0, NotChecked=0, Total=1482 [2024-10-15 14:12:53,322 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:53,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:53,573 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2024-10-15 14:12:53,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-10-15 14:12:53,574 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2024-10-15 14:12:53,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:53,575 INFO L225 Difference]: With dead ends: 168 [2024-10-15 14:12:53,576 INFO L226 Difference]: Without dead ends: 114 [2024-10-15 14:12:53,578 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=674, Invalid=886, Unknown=0, NotChecked=0, Total=1560 [2024-10-15 14:12:53,579 INFO L432 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:53,579 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 77 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-10-15 14:12:53,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-10-15 14:12:53,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2024-10-15 14:12:53,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:53,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2024-10-15 14:12:53,599 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 55 [2024-10-15 14:12:53,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:53,600 INFO L471 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2024-10-15 14:12:53,600 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.128205128205128) internal successors, (83), 38 states have internal predecessors, (83), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:53,603 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:53,603 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2024-10-15 14:12:53,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-10-15 14:12:53,606 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:53,606 INFO L215 NwaCegarLoop]: trace histogram [35, 34, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:53,620 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-15 14:12:53,807 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:53,807 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:53,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:53,808 INFO L85 PathProgramCache]: Analyzing trace with hash 638229637, now seen corresponding path program 4 times [2024-10-15 14:12:53,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:53,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846845084] [2024-10-15 14:12:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:53,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:55,095 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:12:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:12:55,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:12:55,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:12:55,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846845084] [2024-10-15 14:12:55,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846845084] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:12:55,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396954640] [2024-10-15 14:12:55,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-15 14:12:55,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:12:55,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:12:55,108 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) [2024-10-15 14:12:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-15 14:12:55,264 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-15 14:12:55,265 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:12:55,268 INFO L255 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-10-15 14:12:55,272 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:12:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:12:55,359 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:12:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1718 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:12:56,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396954640] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:12:56,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:12:56,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-10-15 14:12:56,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487935068] [2024-10-15 14:12:56,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:12:56,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-10-15 14:12:56,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:12:56,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-10-15 14:12:56,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-15 14:12:56,676 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:57,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:12:57,200 INFO L93 Difference]: Finished difference Result 320 states and 387 transitions. [2024-10-15 14:12:57,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-10-15 14:12:57,201 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2024-10-15 14:12:57,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:12:57,204 INFO L225 Difference]: With dead ends: 320 [2024-10-15 14:12:57,205 INFO L226 Difference]: Without dead ends: 244 [2024-10-15 14:12:57,206 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-10-15 14:12:57,207 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 382 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-10-15 14:12:57,207 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 84 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-10-15 14:12:57,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2024-10-15 14:12:57,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 148. [2024-10-15 14:12:57,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:57,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2024-10-15 14:12:57,224 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 113 [2024-10-15 14:12:57,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:12:57,224 INFO L471 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2024-10-15 14:12:57,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1304347826086956) internal successors, (78), 69 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:12:57,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:57,225 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2024-10-15 14:12:57,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2024-10-15 14:12:57,227 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:12:57,227 INFO L215 NwaCegarLoop]: trace histogram [66, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:12:57,241 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-10-15 14:12:57,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-15 14:12:57,428 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:12:57,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:12:57,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1439981179, now seen corresponding path program 5 times [2024-10-15 14:12:57,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:12:57,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789124332] [2024-10-15 14:12:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:12:57,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:12:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:13:00,967 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:13:00,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:13:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:13:00,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:13:00,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789124332] [2024-10-15 14:13:00,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789124332] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:13:00,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689579804] [2024-10-15 14:13:00,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-10-15 14:13:00,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:13:00,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:13:00,978 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) [2024-10-15 14:13:00,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-15 14:15:28,721 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-10-15 14:15:28,721 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-15 14:15:28,787 INFO L255 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-10-15 14:15:28,792 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-15 14:15:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:15:28,941 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-15 14:15:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3401 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:15:33,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689579804] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-15 14:15:33,450 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-15 14:15:33,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 137 [2024-10-15 14:15:33,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905453155] [2024-10-15 14:15:33,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-15 14:15:33,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2024-10-15 14:15:33,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-15 14:15:33,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2024-10-15 14:15:33,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2024-10-15 14:15:33,459 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:15:36,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-10-15 14:15:36,112 INFO L93 Difference]: Finished difference Result 592 states and 761 transitions. [2024-10-15 14:15:36,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2024-10-15 14:15:36,113 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2024-10-15 14:15:36,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-10-15 14:15:36,116 INFO L225 Difference]: With dead ends: 592 [2024-10-15 14:15:36,116 INFO L226 Difference]: Without dead ends: 516 [2024-10-15 14:15:36,120 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=9316, Invalid=9316, Unknown=0, NotChecked=0, Total=18632 [2024-10-15 14:15:36,121 INFO L432 NwaCegarLoop]: 11 mSDtfsCounter, 947 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-10-15 14:15:36,121 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [947 Valid, 158 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-10-15 14:15:36,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2024-10-15 14:15:36,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 216. [2024-10-15 14:15:36,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:15:36,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2024-10-15 14:15:36,152 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 147 [2024-10-15 14:15:36,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-10-15 14:15:36,155 INFO L471 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2024-10-15 14:15:36,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0656934306569343) internal successors, (146), 137 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-10-15 14:15:36,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:15:36,156 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2024-10-15 14:15:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2024-10-15 14:15:36,179 INFO L207 NwaCegarLoop]: Found error trace [2024-10-15 14:15:36,179 INFO L215 NwaCegarLoop]: trace histogram [134, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-15 14:15:36,237 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-15 14:15:36,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:15:36,381 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-10-15 14:15:36,381 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-15 14:15:36,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1120277627, now seen corresponding path program 6 times [2024-10-15 14:15:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-15 14:15:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516733780] [2024-10-15 14:15:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-15 14:15:36,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-15 14:15:36,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:15:46,533 INFO L368 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-10-15 14:15:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-15 14:15:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10235 backedges. 0 proven. 9045 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2024-10-15 14:15:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-15 14:15:46,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516733780] [2024-10-15 14:15:46,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516733780] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-15 14:15:46,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480144094] [2024-10-15 14:15:46,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-10-15 14:15:46,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-15 14:15:46,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-10-15 14:15:46,542 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) [2024-10-15 14:15:46,544 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process