./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-lit/mcmillan2006.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 27b49876 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-lit/mcmillan2006.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 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-27b4987-m [2024-09-21 11:25:58,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 11:25:58,332 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 11:25:58,335 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 11:25:58,335 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 11:25:58,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 11:25:58,362 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 11:25:58,362 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 11:25:58,362 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 11:25:58,363 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 11:25:58,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 11:25:58,363 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 11:25:58,364 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 11:25:58,364 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 11:25:58,366 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 11:25:58,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 11:25:58,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 11:25:58,367 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 11:25:58,367 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 11:25:58,367 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 11:25:58,368 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 11:25:58,368 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 11:25:58,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 11:25:58,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 11:25:58,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 11:25:58,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 11:25:58,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 11:25:58,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 11:25:58,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 11:25:58,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 11:25:58,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 11:25:58,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 11:25:58,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:25:58,374 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 11:25:58,374 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 11:25:58,374 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 11:25:58,374 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 11:25:58,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 11:25:58,375 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 11:25:58,375 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 11:25:58,375 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 11:25:58,376 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 11:25:58,376 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 45cd9f1eda35cecb580d3b7fe5199506be9e5041f2297c1c3e22e0a862fa68be Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 11:25:58,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 11:25:58,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 11:25:58,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 11:25:58,636 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 11:25:58,636 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 11:25:58,637 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-21 11:25:59,925 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 11:26:00,080 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 11:26:00,080 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-lit/mcmillan2006.i [2024-09-21 11:26:00,088 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/88d780057/bc74c31920b74b259308f7011a46caab/FLAG75c088d50 [2024-09-21 11:26:00,107 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/88d780057/bc74c31920b74b259308f7011a46caab [2024-09-21 11:26:00,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 11:26:00,112 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 11:26:00,113 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 11:26:00,114 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 11:26:00,118 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 11:26:00,119 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ea921a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00, skipping insertion in model container [2024-09-21 11:26:00,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,135 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 11:26:00,254 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-lit/mcmillan2006.i[1009,1022] [2024-09-21 11:26:00,266 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:26:00,272 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 11:26:00,281 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-lit/mcmillan2006.i[1009,1022] [2024-09-21 11:26:00,283 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 11:26:00,295 INFO L204 MainTranslator]: Completed translation [2024-09-21 11:26:00,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00 WrapperNode [2024-09-21 11:26:00,295 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 11:26:00,296 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 11:26:00,296 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 11:26:00,296 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 11:26:00,301 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,309 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,314 INFO L138 Inliner]: procedures = 18, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 11:26:00,314 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 11:26:00,314 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 11:26:00,315 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 11:26:00,315 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 11:26:00,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,332 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,338 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,356 INFO L175 MemorySlicer]: Split 4 memory accesses to 2 slices as follows [2, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-09-21 11:26:00,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,357 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,360 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,365 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,366 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,367 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,371 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 11:26:00,372 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 11:26:00,372 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 11:26:00,372 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 11:26:00,373 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (1/1) ... [2024-09-21 11:26:00,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 11:26:00,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:00,454 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-21 11:26:00,464 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-21 11:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 11:26:00,495 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 11:26:00,495 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 11:26:00,496 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-09-21 11:26:00,496 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 11:26:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 11:26:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-09-21 11:26:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-09-21 11:26:00,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-21 11:26:00,497 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-21 11:26:00,553 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 11:26:00,555 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 11:26:00,696 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-21 11:26:00,696 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 11:26:00,716 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 11:26:00,717 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-21 11:26:00,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:26:00 BoogieIcfgContainer [2024-09-21 11:26:00,717 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 11:26:00,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 11:26:00,722 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 11:26:00,725 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 11:26:00,729 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:26:00" (1/3) ... [2024-09-21 11:26:00,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ff4ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:26:00, skipping insertion in model container [2024-09-21 11:26:00,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:26:00" (2/3) ... [2024-09-21 11:26:00,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ff4ead and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:26:00, skipping insertion in model container [2024-09-21 11:26:00,730 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:26:00" (3/3) ... [2024-09-21 11:26:00,731 INFO L112 eAbstractionObserver]: Analyzing ICFG mcmillan2006.i [2024-09-21 11:26:00,755 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 11:26:00,756 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 11:26:00,808 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 11:26:00,814 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@360f70d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 11:26:00,815 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 11:26:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-09-21 11:26:00,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:26:00,823 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:00,823 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:00,824 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:00,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:00,827 INFO L85 PathProgramCache]: Analyzing trace with hash -94361564, now seen corresponding path program 1 times [2024-09-21 11:26:00,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:00,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810895083] [2024-09-21 11:26:00,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:00,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:00,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:00,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:00,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:00,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810895083] [2024-09-21 11:26:00,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810895083] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:26:00,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:26:00,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-21 11:26:00,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207685507] [2024-09-21 11:26:00,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:26:00,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-21 11:26:00,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:01,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-21 11:26:01,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-21 11:26:01,017 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 4.5) internal successors, (9), 2 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) [2024-09-21 11:26:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:01,036 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2024-09-21 11:26:01,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-21 11:26:01,038 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2024-09-21 11:26:01,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:01,042 INFO L225 Difference]: With dead ends: 37 [2024-09-21 11:26:01,043 INFO L226 Difference]: Without dead ends: 17 [2024-09-21 11:26:01,044 INFO L433 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 [2024-09-21 11:26:01,047 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:01,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:26:01,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-21 11:26:01,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-21 11:26:01,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 11:26:01,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-21 11:26:01,072 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2024-09-21 11:26:01,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:01,073 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-21 11:26:01,073 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2024-09-21 11:26:01,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-21 11:26:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 11:26:01,074 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:01,074 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:01,074 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 11:26:01,074 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:01,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1124416354, now seen corresponding path program 1 times [2024-09-21 11:26:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:01,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135447581] [2024-09-21 11:26:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:01,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:01,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:01,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:01,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:01,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:01,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135447581] [2024-09-21 11:26:01,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135447581] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 11:26:01,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 11:26:01,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 11:26:01,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308709550] [2024-09-21 11:26:01,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 11:26:01,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 11:26:01,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 11:26:01,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:26:01,240 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2024-09-21 11:26:01,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:01,274 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2024-09-21 11:26:01,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 11:26:01,275 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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 [2024-09-21 11:26:01,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:01,276 INFO L225 Difference]: With dead ends: 29 [2024-09-21 11:26:01,276 INFO L226 Difference]: Without dead ends: 18 [2024-09-21 11:26:01,276 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-21 11:26:01,278 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:01,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:26:01,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-21 11:26:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-21 11:26:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-21 11:26:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-21 11:26:01,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-21 11:26:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:01,286 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-21 11:26:01,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2024-09-21 11:26:01,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:01,287 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-21 11:26:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-21 11:26:01,287 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:01,288 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:01,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-21 11:26:01,288 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:01,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:01,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1626584132, now seen corresponding path program 1 times [2024-09-21 11:26:01,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:01,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445439470] [2024-09-21 11:26:01,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:01,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:01,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:01,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445439470] [2024-09-21 11:26:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445439470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:01,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177812501] [2024-09-21 11:26:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:01,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:01,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:01,627 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:01,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 11:26:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:01,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-21 11:26:01,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:01,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:26:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:01,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:01,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-21 11:26:01,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2024-09-21 11:26:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:01,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177812501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:01,828 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:01,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2024-09-21 11:26:01,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583013282] [2024-09-21 11:26:01,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:01,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-21 11:26:01,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:01,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-21 11:26:01,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-21 11:26:01,830 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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) [2024-09-21 11:26:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:01,916 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-21 11:26:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:26:01,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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 14 [2024-09-21 11:26:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:01,917 INFO L225 Difference]: With dead ends: 28 [2024-09-21 11:26:01,917 INFO L226 Difference]: Without dead ends: 26 [2024-09-21 11:26:01,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-21 11:26:01,918 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:01,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 76 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:26:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-21 11:26:01,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2024-09-21 11:26:01,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:26:01,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-21 11:26:01,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 14 [2024-09-21 11:26:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:01,923 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-21 11:26:01,924 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 11 states have internal predecessors, (17), 2 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) [2024-09-21 11:26:01,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:01,924 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-21 11:26:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-21 11:26:01,925 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:01,925 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:01,939 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-21 11:26:02,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:02,129 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:02,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1746762740, now seen corresponding path program 1 times [2024-09-21 11:26:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:02,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973158207] [2024-09-21 11:26:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:02,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-21 11:26:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:02,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973158207] [2024-09-21 11:26:02,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973158207] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:02,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435461025] [2024-09-21 11:26:02,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:02,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:02,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:02,223 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:02,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 11:26:02,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 11:26:02,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:02,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:02,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435461025] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:02,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:02,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-09-21 11:26:02,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083662108] [2024-09-21 11:26:02,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:02,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-21 11:26:02,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:02,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-21 11:26:02,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:26:02,397 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:02,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:02,433 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-21 11:26:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 11:26:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-09-21 11:26:02,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:02,435 INFO L225 Difference]: With dead ends: 39 [2024-09-21 11:26:02,435 INFO L226 Difference]: Without dead ends: 25 [2024-09-21 11:26:02,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-09-21 11:26:02,436 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:02,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 73 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:26:02,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-21 11:26:02,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-21 11:26:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-21 11:26:02,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2024-09-21 11:26:02,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2024-09-21 11:26:02,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:02,443 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2024-09-21 11:26:02,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:02,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:02,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2024-09-21 11:26:02,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-21 11:26:02,444 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:02,444 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:02,456 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-21 11:26:02,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:02,649 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:02,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:02,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1333923114, now seen corresponding path program 2 times [2024-09-21 11:26:02,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:02,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654317703] [2024-09-21 11:26:02,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:02,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:02,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:02,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:26:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:02,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:02,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654317703] [2024-09-21 11:26:02,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654317703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:02,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549150260] [2024-09-21 11:26:02,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:26:02,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:02,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:02,829 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:02,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 11:26:02,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:26:02,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:02,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-21 11:26:02,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:02,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:26:03,054 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:03,055 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:03,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:26:03,120 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:26:03,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 11:26:03,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549150260] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:03,127 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:03,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2024-09-21 11:26:03,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942424590] [2024-09-21 11:26:03,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:03,128 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-21 11:26:03,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:03,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-21 11:26:03,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-21 11:26:03,129 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:03,240 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-21 11:26:03,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 11:26:03,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-21 11:26:03,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:03,241 INFO L225 Difference]: With dead ends: 36 [2024-09-21 11:26:03,241 INFO L226 Difference]: Without dead ends: 34 [2024-09-21 11:26:03,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:26:03,241 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:03,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 143 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:26:03,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-21 11:26:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-21 11:26:03,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 23 states have internal predecessors, (24), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-09-21 11:26:03,247 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 22 [2024-09-21 11:26:03,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:03,247 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-09-21 11:26:03,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 17 states have internal predecessors, (32), 5 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:03,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-09-21 11:26:03,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-21 11:26:03,248 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:03,249 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:03,262 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-21 11:26:03,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:03,451 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:03,452 INFO L85 PathProgramCache]: Analyzing trace with hash -815600930, now seen corresponding path program 3 times [2024-09-21 11:26:03,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:03,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630754442] [2024-09-21 11:26:03,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:03,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:03,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:03,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-21 11:26:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:03,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-21 11:26:03,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:03,559 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:26:03,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630754442] [2024-09-21 11:26:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630754442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:03,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875068723] [2024-09-21 11:26:03,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:26:03,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:03,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:03,564 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:03,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 11:26:03,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-21 11:26:03,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:03,618 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 11:26:03,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:26:03,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:03,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:26:03,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875068723] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:03,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:03,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2024-09-21 11:26:03,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592730754] [2024-09-21 11:26:03,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:03,842 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 11:26:03,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 11:26:03,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:26:03,843 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 11:26:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:03,915 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2024-09-21 11:26:03,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 11:26:03,915 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 29 [2024-09-21 11:26:03,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:03,916 INFO L225 Difference]: With dead ends: 50 [2024-09-21 11:26:03,916 INFO L226 Difference]: Without dead ends: 33 [2024-09-21 11:26:03,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-21 11:26:03,918 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:03,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 75 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:26:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-21 11:26:03,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-21 11:26:03,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 24 states have internal predecessors, (25), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-21 11:26:03,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-21 11:26:03,926 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2024-09-21 11:26:03,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:03,926 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-21 11:26:03,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 11:26:03,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:03,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-21 11:26:03,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-21 11:26:03,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:03,929 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:03,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 11:26:04,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:04,133 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:04,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:04,133 INFO L85 PathProgramCache]: Analyzing trace with hash 2003727868, now seen corresponding path program 4 times [2024-09-21 11:26:04,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:04,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802384272] [2024-09-21 11:26:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:04,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:04,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:04,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:04,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-21 11:26:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:04,406 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-21 11:26:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:26:04,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802384272] [2024-09-21 11:26:04,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802384272] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:04,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514614326] [2024-09-21 11:26:04,410 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:26:04,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:04,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:04,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:04,422 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 11:26:04,466 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:26:04,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:04,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 11:26:04,470 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:04,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:26:05,133 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:26:05,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:26:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-21 11:26:05,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:05,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514614326] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:05,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:26:05,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 23 [2024-09-21 11:26:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703944273] [2024-09-21 11:26:05,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:05,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:26:05,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:26:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2024-09-21 11:26:05,261 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 11:26:09,473 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:13,658 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:13,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:13,765 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2024-09-21 11:26:13,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:26:13,765 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 30 [2024-09-21 11:26:13,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:13,766 INFO L225 Difference]: With dead ends: 64 [2024-09-21 11:26:13,766 INFO L226 Difference]: Without dead ends: 43 [2024-09-21 11:26:13,767 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 27 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2024-09-21 11:26:13,769 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 39 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 16 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:13,769 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 143 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 255 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2024-09-21 11:26:13,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-21 11:26:13,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2024-09-21 11:26:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 11:26:13,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-21 11:26:13,783 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 30 [2024-09-21 11:26:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:13,783 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-21 11:26:13,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 6 states have call successors, (8), 4 states have call predecessors, (8), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-21 11:26:13,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:13,784 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-21 11:26:13,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-21 11:26:13,785 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:13,785 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:13,803 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-21 11:26:13,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-21 11:26:13,986 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:13,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:13,987 INFO L85 PathProgramCache]: Analyzing trace with hash -868360470, now seen corresponding path program 5 times [2024-09-21 11:26:13,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:13,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225392891] [2024-09-21 11:26:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:13,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:14,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:14,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:14,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-21 11:26:14,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:14,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 11:26:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:14,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-21 11:26:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:14,230 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:26:14,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225392891] [2024-09-21 11:26:14,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225392891] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:14,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285946760] [2024-09-21 11:26:14,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:26:14,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:14,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:14,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:14,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 11:26:14,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-21 11:26:14,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:14,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-21 11:26:14,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:14,337 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:26:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:26:14,652 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:14,725 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:26:14,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:26:14,738 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 11:26:14,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285946760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:14,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:14,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 14] total 27 [2024-09-21 11:26:14,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668602606] [2024-09-21 11:26:14,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:14,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-21 11:26:14,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:14,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-21 11:26:14,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2024-09-21 11:26:14,740 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 11:26:14,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:14,937 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-21 11:26:14,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 11:26:14,938 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 38 [2024-09-21 11:26:14,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:14,938 INFO L225 Difference]: With dead ends: 52 [2024-09-21 11:26:14,938 INFO L226 Difference]: Without dead ends: 50 [2024-09-21 11:26:14,939 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 7 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2024-09-21 11:26:14,939 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:14,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 216 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:26:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-21 11:26:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2024-09-21 11:26:14,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 11:26:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-21 11:26:14,950 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 38 [2024-09-21 11:26:14,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:14,951 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-21 11:26:14,951 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.6923076923076923) internal successors, (44), 25 states have internal predecessors, (44), 9 states have call successors, (11), 4 states have call predecessors, (11), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 11:26:14,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:14,951 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-21 11:26:14,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-21 11:26:14,955 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:14,955 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:14,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-21 11:26:15,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:15,156 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:15,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:15,157 INFO L85 PathProgramCache]: Analyzing trace with hash 1489740062, now seen corresponding path program 6 times [2024-09-21 11:26:15,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:15,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009630996] [2024-09-21 11:26:15,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:15,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:15,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-21 11:26:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 11:26:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-21 11:26:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:26:15,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:15,281 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:15,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:15,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009630996] [2024-09-21 11:26:15,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009630996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:15,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174399410] [2024-09-21 11:26:15,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:26:15,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:15,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:15,283 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:15,285 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 11:26:15,332 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-21 11:26:15,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:15,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 11:26:15,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:15,427 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:15,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:15,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174399410] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:15,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2024-09-21 11:26:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554918570] [2024-09-21 11:26:15,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:15,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 11:26:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 11:26:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:26:15,504 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:26:15,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:15,559 INFO L93 Difference]: Finished difference Result 72 states and 78 transitions. [2024-09-21 11:26:15,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 11:26:15,560 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2024-09-21 11:26:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:15,560 INFO L225 Difference]: With dead ends: 72 [2024-09-21 11:26:15,560 INFO L226 Difference]: Without dead ends: 49 [2024-09-21 11:26:15,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2024-09-21 11:26:15,561 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:15,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 110 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 11:26:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-21 11:26:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-21 11:26:15,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 11:26:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2024-09-21 11:26:15,568 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2024-09-21 11:26:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:15,568 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2024-09-21 11:26:15,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:26:15,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:15,569 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2024-09-21 11:26:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-21 11:26:15,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:15,570 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:15,582 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 11:26:15,770 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:15,770 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:15,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:15,771 INFO L85 PathProgramCache]: Analyzing trace with hash 977875004, now seen corresponding path program 7 times [2024-09-21 11:26:15,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:15,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059292090] [2024-09-21 11:26:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:15,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:15,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 11:26:16,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:26:16,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 11:26:16,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-21 11:26:16,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:16,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059292090] [2024-09-21 11:26:16,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059292090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:16,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743801139] [2024-09-21 11:26:16,027 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:26:16,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:16,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:16,028 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:16,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 11:26:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:16,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-21 11:26:16,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:16,151 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:26:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:16,515 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:16,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:26:16,617 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:26:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-21 11:26:16,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743801139] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:16,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:16,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 16] total 31 [2024-09-21 11:26:16,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307598958] [2024-09-21 11:26:16,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:16,628 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-21 11:26:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-21 11:26:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2024-09-21 11:26:16,629 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:26:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:16,893 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-09-21 11:26:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 11:26:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 46 [2024-09-21 11:26:16,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:16,895 INFO L225 Difference]: With dead ends: 60 [2024-09-21 11:26:16,896 INFO L226 Difference]: Without dead ends: 58 [2024-09-21 11:26:16,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1071, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:26:16,897 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 13 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:16,901 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 254 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-21 11:26:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-09-21 11:26:16,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2024-09-21 11:26:16,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.05) internal successors, (42), 41 states have internal predecessors, (42), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 11:26:16,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-21 11:26:16,918 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 46 [2024-09-21 11:26:16,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:16,918 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-21 11:26:16,918 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 states have internal predecessors, (50), 11 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:26:16,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:16,918 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-21 11:26:16,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-21 11:26:16,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:16,919 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:16,932 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-21 11:26:17,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:17,120 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:17,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:17,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1649176692, now seen corresponding path program 8 times [2024-09-21 11:26:17,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:17,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064545636] [2024-09-21 11:26:17,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:17,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:17,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:17,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-21 11:26:17,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:26:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 11:26:17,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-21 11:26:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:26:17,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:17,329 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:26:17,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064545636] [2024-09-21 11:26:17,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064545636] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:17,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243823411] [2024-09-21 11:26:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:26:17,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:17,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:17,335 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:17,336 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 11:26:17,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:26:17,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:17,383 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 11:26:17,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:26:17,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:26:17,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243823411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:17,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:17,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2024-09-21 11:26:17,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741619927] [2024-09-21 11:26:17,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:17,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-21 11:26:17,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:17,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-21 11:26:17,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:26:17,797 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 11:26:17,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:17,959 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2024-09-21 11:26:17,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 11:26:17,960 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 53 [2024-09-21 11:26:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:17,960 INFO L225 Difference]: With dead ends: 83 [2024-09-21 11:26:17,961 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 11:26:17,961 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 100 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2024-09-21 11:26:17,962 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:17,962 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 200 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:26:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 11:26:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-21 11:26:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 41 states have (on average 1.048780487804878) internal successors, (43), 42 states have internal predecessors, (43), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-21 11:26:17,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-21 11:26:17,975 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2024-09-21 11:26:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:17,976 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-21 11:26:17,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 11:26:17,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-21 11:26:17,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-21 11:26:17,980 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:17,980 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:17,995 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-21 11:26:18,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 11:26:18,180 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:18,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1278681258, now seen corresponding path program 9 times [2024-09-21 11:26:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205797680] [2024-09-21 11:26:18,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:18,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:18,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:18,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-21 11:26:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:26:18,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:26:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 11:26:18,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:26:18,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:26:18,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205797680] [2024-09-21 11:26:18,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205797680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:18,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707847958] [2024-09-21 11:26:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:26:18,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:18,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:18,533 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:18,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 11:26:18,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-21 11:26:18,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:18,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 11:26:18,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:18,705 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:26:19,559 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:26:19,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:26:19,604 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 35 proven. 36 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 11:26:19,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:19,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707847958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:19,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:26:19,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 35 [2024-09-21 11:26:19,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540398505] [2024-09-21 11:26:19,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:19,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 11:26:19,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 11:26:19,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1182, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 11:26:19,729 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 11:26:21,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:25,403 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:29,519 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:33,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:33,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:33,967 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2024-09-21 11:26:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-21 11:26:33,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 54 [2024-09-21 11:26:33,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:33,970 INFO L225 Difference]: With dead ends: 101 [2024-09-21 11:26:33,970 INFO L226 Difference]: Without dead ends: 67 [2024-09-21 11:26:33,971 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 11 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=361, Invalid=3299, Unknown=0, NotChecked=0, Total=3660 [2024-09-21 11:26:33,971 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 28 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 15 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:33,971 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 339 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1022 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2024-09-21 11:26:33,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-21 11:26:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-21 11:26:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 48 states have internal predecessors, (49), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-21 11:26:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-09-21 11:26:33,987 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 54 [2024-09-21 11:26:33,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:33,987 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-09-21 11:26:33,987 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.5588235294117647) internal successors, (53), 33 states have internal predecessors, (53), 12 states have call successors, (14), 4 states have call predecessors, (14), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 11:26:33,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:33,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-09-21 11:26:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-21 11:26:33,989 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:33,989 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:34,003 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-21 11:26:34,189 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-21 11:26:34,190 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:34,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:34,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1382054524, now seen corresponding path program 10 times [2024-09-21 11:26:34,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:34,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898040060] [2024-09-21 11:26:34,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:34,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:34,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-21 11:26:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 11:26:34,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-21 11:26:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:26:34,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-21 11:26:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:26:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:34,571 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 11:26:34,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:34,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898040060] [2024-09-21 11:26:34,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898040060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:34,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934333969] [2024-09-21 11:26:34,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:26:34,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:34,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:34,572 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:34,576 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 11:26:34,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:26:34,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:34,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 11:26:34,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:34,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:26:36,214 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:26:36,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:26:36,266 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 51 proven. 46 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-21 11:26:36,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:36,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934333969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:36,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:26:36,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 39 [2024-09-21 11:26:36,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929509455] [2024-09-21 11:26:36,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:36,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-21 11:26:36,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:36,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-21 11:26:36,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1460, Unknown=0, NotChecked=0, Total=1640 [2024-09-21 11:26:36,408 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 11:26:40,802 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:44,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:48,988 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:53,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:57,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:26:57,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:57,441 INFO L93 Difference]: Finished difference Result 120 states and 124 transitions. [2024-09-21 11:26:57,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-21 11:26:57,442 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 62 [2024-09-21 11:26:57,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:57,443 INFO L225 Difference]: With dead ends: 120 [2024-09-21 11:26:57,443 INFO L226 Difference]: Without dead ends: 75 [2024-09-21 11:26:57,444 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 51 SyntacticMatches, 13 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=424, Invalid=4132, Unknown=0, NotChecked=0, Total=4556 [2024-09-21 11:26:57,444 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 49 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 25 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:57,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 205 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 708 Invalid, 5 Unknown, 0 Unchecked, 20.4s Time] [2024-09-21 11:26:57,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-21 11:26:57,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2024-09-21 11:26:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 54 states have internal predecessors, (55), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-21 11:26:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2024-09-21 11:26:57,456 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 62 [2024-09-21 11:26:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:57,456 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2024-09-21 11:26:57,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.5526315789473684) internal successors, (59), 37 states have internal predecessors, (59), 14 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 11:26:57,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2024-09-21 11:26:57,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-21 11:26:57,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:57,457 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:57,476 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-21 11:26:57,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:57,658 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:57,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:57,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1876307350, now seen corresponding path program 11 times [2024-09-21 11:26:57,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:57,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184751134] [2024-09-21 11:26:57,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:57,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:26:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:26:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 11:26:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:26:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 11:26:58,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 11:26:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-21 11:26:58,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:26:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:26:58,074 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 11:26:58,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:26:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184751134] [2024-09-21 11:26:58,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184751134] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:26:58,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689992450] [2024-09-21 11:26:58,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:26:58,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:26:58,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:26:58,077 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:26:58,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 11:26:58,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-21 11:26:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:26:58,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-21 11:26:58,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:26:58,310 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:26:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 127 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 11:26:59,100 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:26:59,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:26:59,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:26:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-21 11:26:59,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689992450] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:26:59,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:26:59,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 22] total 43 [2024-09-21 11:26:59,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142400633] [2024-09-21 11:26:59,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:26:59,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-21 11:26:59,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:26:59,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-21 11:26:59,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1676, Unknown=0, NotChecked=0, Total=1806 [2024-09-21 11:26:59,229 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-21 11:26:59,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:26:59,648 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2024-09-21 11:26:59,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-21 11:26:59,649 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 70 [2024-09-21 11:26:59,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:26:59,650 INFO L225 Difference]: With dead ends: 84 [2024-09-21 11:26:59,650 INFO L226 Difference]: Without dead ends: 82 [2024-09-21 11:26:59,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 15 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=158, Invalid=2004, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:26:59,651 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 986 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:26:59,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 373 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 986 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-21 11:26:59,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-21 11:26:59,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2024-09-21 11:26:59,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:26:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2024-09-21 11:26:59,667 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 70 [2024-09-21 11:26:59,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:26:59,668 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2024-09-21 11:26:59,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 17 states have call successors, (19), 4 states have call predecessors, (19), 2 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-21 11:26:59,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:59,669 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2024-09-21 11:26:59,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2024-09-21 11:26:59,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:26:59,669 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:26:59,684 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-21 11:26:59,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-21 11:26:59,874 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:26:59,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:26:59,874 INFO L85 PathProgramCache]: Analyzing trace with hash 346996126, now seen corresponding path program 12 times [2024-09-21 11:26:59,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:26:59,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340272534] [2024-09-21 11:26:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:26:59,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:26:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:27:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-21 11:27:00,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 11:27:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:27:00,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 11:27:00,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 11:27:00,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-21 11:27:00,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:27:00,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-21 11:27:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:00,137 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:00,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:27:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340272534] [2024-09-21 11:27:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340272534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517756086] [2024-09-21 11:27:00,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:27:00,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:00,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:27:00,140 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:27:00,148 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 11:27:00,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-21 11:27:00,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:27:00,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-21 11:27:00,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:27:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:00,454 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:27:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:00,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517756086] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:27:00,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:27:00,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2024-09-21 11:27:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720569260] [2024-09-21 11:27:00,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:27:00,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-21 11:27:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:27:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-21 11:27:00,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-21 11:27:00,640 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 11:27:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:27:00,743 INFO L93 Difference]: Finished difference Result 116 states and 126 transitions. [2024-09-21 11:27:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 11:27:00,745 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 77 [2024-09-21 11:27:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:27:00,750 INFO L225 Difference]: With dead ends: 116 [2024-09-21 11:27:00,750 INFO L226 Difference]: Without dead ends: 81 [2024-09-21 11:27:00,750 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 145 SyntacticMatches, 17 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=235, Invalid=757, Unknown=0, NotChecked=0, Total=992 [2024-09-21 11:27:00,751 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:27:00,751 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:27:00,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-21 11:27:00,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-21 11:27:00,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 60 states have internal predecessors, (61), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-21 11:27:00,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2024-09-21 11:27:00,770 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2024-09-21 11:27:00,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:27:00,771 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2024-09-21 11:27:00,771 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 11:27:00,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:00,771 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2024-09-21 11:27:00,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-21 11:27:00,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:27:00,772 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:27:00,785 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-21 11:27:00,975 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-21 11:27:00,976 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:27:00,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:00,976 INFO L85 PathProgramCache]: Analyzing trace with hash 58217660, now seen corresponding path program 13 times [2024-09-21 11:27:00,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:27:00,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003190140] [2024-09-21 11:27:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:27:00,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:27:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:27:01,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-21 11:27:01,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-21 11:27:01,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:27:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:27:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:27:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-21 11:27:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-21 11:27:01,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 11:27:01,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:01,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:27:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003190140] [2024-09-21 11:27:01,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003190140] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:01,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027774292] [2024-09-21 11:27:01,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:27:01,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:01,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:27:01,372 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:27:01,373 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 11:27:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:01,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-21 11:27:01,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:27:01,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:27:02,524 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 161 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:02,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:27:02,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:27:02,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:27:02,665 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-21 11:27:02,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027774292] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:27:02,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:27:02,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 24] total 47 [2024-09-21 11:27:02,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852147711] [2024-09-21 11:27:02,666 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:27:02,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-21 11:27:02,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:27:02,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-21 11:27:02,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2019, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:27:02,669 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 11:27:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:27:03,263 INFO L93 Difference]: Finished difference Result 92 states and 93 transitions. [2024-09-21 11:27:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 11:27:03,263 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 78 [2024-09-21 11:27:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:27:03,264 INFO L225 Difference]: With dead ends: 92 [2024-09-21 11:27:03,264 INFO L226 Difference]: Without dead ends: 90 [2024-09-21 11:27:03,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 17 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=171, Invalid=2379, Unknown=0, NotChecked=0, Total=2550 [2024-09-21 11:27:03,266 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:27:03,267 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 487 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 11:27:03,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-21 11:27:03,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2024-09-21 11:27:03,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 11:27:03,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2024-09-21 11:27:03,294 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 78 [2024-09-21 11:27:03,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:27:03,295 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2024-09-21 11:27:03,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.608695652173913) internal successors, (74), 45 states have internal predecessors, (74), 19 states have call successors, (21), 4 states have call predecessors, (21), 2 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 11:27:03,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:03,295 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2024-09-21 11:27:03,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 11:27:03,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:27:03,295 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:27:03,309 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-21 11:27:03,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-21 11:27:03,501 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:27:03,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:03,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1937089780, now seen corresponding path program 14 times [2024-09-21 11:27:03,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:27:03,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368194977] [2024-09-21 11:27:03,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:27:03,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:27:03,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:27:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-21 11:27:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-21 11:27:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:27:03,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:27:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:27:03,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-21 11:27:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-21 11:27:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 11:27:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 11:27:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-21 11:27:03,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:27:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368194977] [2024-09-21 11:27:03,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368194977] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:03,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379901784] [2024-09-21 11:27:03,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:27:03,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:03,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:27:03,766 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:27:03,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 11:27:03,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:27:03,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:27:03,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 11:27:03,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:27:04,059 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-21 11:27:04,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:27:04,265 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-21 11:27:04,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379901784] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:27:04,265 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:27:04,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2024-09-21 11:27:04,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621964397] [2024-09-21 11:27:04,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:27:04,266 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-21 11:27:04,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:27:04,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-21 11:27:04,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:27:04,267 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-21 11:27:04,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:27:04,392 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2024-09-21 11:27:04,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 11:27:04,392 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 85 [2024-09-21 11:27:04,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:27:04,393 INFO L225 Difference]: With dead ends: 127 [2024-09-21 11:27:04,393 INFO L226 Difference]: Without dead ends: 89 [2024-09-21 11:27:04,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 160 SyntacticMatches, 19 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 711 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=910, Unknown=0, NotChecked=0, Total=1190 [2024-09-21 11:27:04,394 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:27:04,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 232 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:27:04,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-21 11:27:04,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2024-09-21 11:27:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 66 states have internal predecessors, (67), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-21 11:27:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2024-09-21 11:27:04,408 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2024-09-21 11:27:04,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:27:04,409 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2024-09-21 11:27:04,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-21 11:27:04,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2024-09-21 11:27:04,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-21 11:27:04,409 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:27:04,409 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:27:04,422 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-21 11:27:04,610 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-21 11:27:04,610 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:27:04,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1607595050, now seen corresponding path program 15 times [2024-09-21 11:27:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:27:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080044786] [2024-09-21 11:27:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:27:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:27:04,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:27:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-21 11:27:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-21 11:27:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-21 11:27:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-21 11:27:05,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-21 11:27:05,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-21 11:27:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-21 11:27:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-21 11:27:05,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-21 11:27:05,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 18 proven. 181 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-21 11:27:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:27:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080044786] [2024-09-21 11:27:05,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080044786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:05,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645962316] [2024-09-21 11:27:05,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:27:05,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:27:05,290 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:27:05,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 11:27:05,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-21 11:27:05,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:27:05,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-21 11:27:05,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:27:05,737 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:27:07,605 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:27:07,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:27:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 117 proven. 82 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-21 11:27:07,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:27:07,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645962316] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:07,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:27:07,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 51 [2024-09-21 11:27:07,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395637167] [2024-09-21 11:27:07,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:27:07,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-21 11:27:07,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:27:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-21 11:27:07,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2468, Unknown=0, NotChecked=0, Total=2756 [2024-09-21 11:27:07,839 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-21 11:27:12,431 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:16,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:20,616 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:24,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:28,853 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:32,961 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:37,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:41,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:27:41,569 INFO L93 Difference]: Finished difference Result 165 states and 169 transitions. [2024-09-21 11:27:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-21 11:27:41,569 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 86 [2024-09-21 11:27:41,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:27:41,570 INFO L225 Difference]: With dead ends: 165 [2024-09-21 11:27:41,570 INFO L226 Difference]: Without dead ends: 99 [2024-09-21 11:27:41,572 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 69 SyntacticMatches, 19 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=643, Invalid=7189, Unknown=0, NotChecked=0, Total=7832 [2024-09-21 11:27:41,572 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 1545 mSolverCounterSat, 26 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 32.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1545 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:27:41,572 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 394 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1545 Invalid, 8 Unknown, 0 Unchecked, 32.8s Time] [2024-09-21 11:27:41,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-21 11:27:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-21 11:27:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 71 states have (on average 1.028169014084507) internal successors, (73), 72 states have internal predecessors, (73), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-21 11:27:41,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2024-09-21 11:27:41,589 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 86 [2024-09-21 11:27:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:27:41,589 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2024-09-21 11:27:41,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.54) internal successors, (77), 49 states have internal predecessors, (77), 20 states have call successors, (22), 4 states have call predecessors, (22), 2 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-21 11:27:41,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2024-09-21 11:27:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-21 11:27:41,590 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:27:41,590 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:27:41,620 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-21 11:27:41,790 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:41,790 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:27:41,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:27:41,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1437286660, now seen corresponding path program 16 times [2024-09-21 11:27:41,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:27:41,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436930375] [2024-09-21 11:27:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:27:41,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:27:41,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:27:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-21 11:27:42,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-21 11:27:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-21 11:27:42,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-21 11:27:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-21 11:27:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-21 11:27:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-21 11:27:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-21 11:27:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-21 11:27:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-21 11:27:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:27:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:27:42,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:27:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436930375] [2024-09-21 11:27:42,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436930375] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:42,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520115876] [2024-09-21 11:27:42,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:27:42,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:27:42,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:27:42,386 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:27:42,393 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-21 11:27:42,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:27:42,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:27:42,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-21 11:27:42,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:27:42,816 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:27:45,081 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:27:45,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:27:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 145 proven. 96 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-21 11:27:45,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:27:45,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520115876] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:27:45,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:27:45,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30] total 55 [2024-09-21 11:27:45,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587641310] [2024-09-21 11:27:45,327 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:27:45,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-21 11:27:45,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:27:45,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-21 11:27:45,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2862, Unknown=0, NotChecked=0, Total=3192 [2024-09-21 11:27:45,329 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-21 11:27:49,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:54,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:27:58,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:02,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:06,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:10,589 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:14,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:18,873 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:23,013 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:23,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:23,406 INFO L93 Difference]: Finished difference Result 180 states and 184 transitions. [2024-09-21 11:28:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-21 11:28:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) Word has length 94 [2024-09-21 11:28:23,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:23,408 INFO L225 Difference]: With dead ends: 180 [2024-09-21 11:28:23,408 INFO L226 Difference]: Without dead ends: 107 [2024-09-21 11:28:23,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 75 SyntacticMatches, 21 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=726, Invalid=8394, Unknown=0, NotChecked=0, Total=9120 [2024-09-21 11:28:23,410 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 36 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 22 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 2410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:23,410 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 562 Invalid, 2410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2379 Invalid, 9 Unknown, 0 Unchecked, 37.1s Time] [2024-09-21 11:28:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-21 11:28:23,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-21 11:28:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.025974025974026) internal successors, (79), 78 states have internal predecessors, (79), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-21 11:28:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2024-09-21 11:28:23,439 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 94 [2024-09-21 11:28:23,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:23,439 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2024-09-21 11:28:23,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.537037037037037) internal successors, (83), 53 states have internal predecessors, (83), 22 states have call successors, (24), 4 states have call predecessors, (24), 2 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-21 11:28:23,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:23,440 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2024-09-21 11:28:23,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-21 11:28:23,440 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:23,440 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:23,458 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-21 11:28:23,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:23,642 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:23,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:23,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1240172010, now seen corresponding path program 17 times [2024-09-21 11:28:23,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:23,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218293191] [2024-09-21 11:28:23,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:23,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:24,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:28:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 11:28:24,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-21 11:28:24,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:28:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-21 11:28:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:28:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:28:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-21 11:28:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-21 11:28:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-21 11:28:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-21 11:28:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:24,202 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:28:24,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218293191] [2024-09-21 11:28:24,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218293191] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:24,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478681577] [2024-09-21 11:28:24,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:28:24,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:24,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:24,204 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:24,205 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-21 11:28:24,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-21 11:28:24,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:24,353 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-21 11:28:24,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:24,634 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:28:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:28:26,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:26,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:28:26,273 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:28:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-21 11:28:26,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478681577] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:26,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:26,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 30] total 59 [2024-09-21 11:28:26,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542847788] [2024-09-21 11:28:26,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:26,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-21 11:28:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:26,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-21 11:28:26,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3240, Unknown=0, NotChecked=0, Total=3422 [2024-09-21 11:28:26,289 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-21 11:28:27,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:27,177 INFO L93 Difference]: Finished difference Result 116 states and 117 transitions. [2024-09-21 11:28:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-21 11:28:27,178 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 102 [2024-09-21 11:28:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:27,178 INFO L225 Difference]: With dead ends: 116 [2024-09-21 11:28:27,178 INFO L226 Difference]: Without dead ends: 114 [2024-09-21 11:28:27,179 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 178 SyntacticMatches, 23 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=210, Invalid=3696, Unknown=0, NotChecked=0, Total=3906 [2024-09-21 11:28:27,179 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 21 mSDsluCounter, 671 mSDsCounter, 0 mSdLazyCounter, 2331 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 696 SdHoareTripleChecker+Invalid, 2339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:27,180 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 696 Invalid, 2339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2331 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-21 11:28:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2024-09-21 11:28:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2024-09-21 11:28:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 11:28:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2024-09-21 11:28:27,200 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 102 [2024-09-21 11:28:27,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:27,201 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2024-09-21 11:28:27,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.5862068965517242) internal successors, (92), 57 states have internal predecessors, (92), 25 states have call successors, (27), 4 states have call predecessors, (27), 2 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-21 11:28:27,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2024-09-21 11:28:27,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 11:28:27,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:27,202 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:27,216 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-21 11:28:27,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:27,406 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:27,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1925454366, now seen corresponding path program 18 times [2024-09-21 11:28:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:27,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981452521] [2024-09-21 11:28:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:27,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-21 11:28:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-21 11:28:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-21 11:28:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-21 11:28:27,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-21 11:28:27,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-21 11:28:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-21 11:28:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-21 11:28:27,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-21 11:28:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-21 11:28:27,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-21 11:28:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-21 11:28:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:27,786 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:27,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:27,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981452521] [2024-09-21 11:28:27,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981452521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:27,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666387579] [2024-09-21 11:28:27,786 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 11:28:27,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:27,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:27,788 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:27,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-21 11:28:28,027 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-21 11:28:28,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:28,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-21 11:28:28,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:28,376 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:28,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:28,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666387579] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:28,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:28,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2024-09-21 11:28:28,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103913095] [2024-09-21 11:28:28,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:28,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-21 11:28:28,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:28,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-21 11:28:28,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-21 11:28:28,668 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-21 11:28:28,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:28,845 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2024-09-21 11:28:28,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-21 11:28:28,846 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 109 [2024-09-21 11:28:28,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:28,847 INFO L225 Difference]: With dead ends: 160 [2024-09-21 11:28:28,847 INFO L226 Difference]: Without dead ends: 113 [2024-09-21 11:28:28,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 205 SyntacticMatches, 25 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1453, Unknown=0, NotChecked=0, Total=1892 [2024-09-21 11:28:28,848 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:28,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 298 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:28:28,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-21 11:28:28,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2024-09-21 11:28:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 84 states have internal predecessors, (85), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-21 11:28:28,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2024-09-21 11:28:28,873 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2024-09-21 11:28:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:28,873 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2024-09-21 11:28:28,873 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-21 11:28:28,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2024-09-21 11:28:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-21 11:28:28,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:28,874 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:28,886 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-21 11:28:29,077 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-21 11:28:29,078 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:29,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:29,078 INFO L85 PathProgramCache]: Analyzing trace with hash -54937284, now seen corresponding path program 19 times [2024-09-21 11:28:29,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:29,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143499454] [2024-09-21 11:28:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:28:29,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:28:29,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 11:28:29,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:28:29,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 11:28:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 11:28:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-21 11:28:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-21 11:28:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-21 11:28:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-21 11:28:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-21 11:28:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-21 11:28:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,860 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:29,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143499454] [2024-09-21 11:28:29,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143499454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:29,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638834497] [2024-09-21 11:28:29,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 11:28:29,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:29,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:29,862 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:29,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-21 11:28:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:29,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-21 11:28:29,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:29,978 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:28:30,712 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 337 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:30,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:31,172 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:28:31,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:28:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 24 proven. 313 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-21 11:28:31,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638834497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:31,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:31,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 33, 32] total 62 [2024-09-21 11:28:31,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501761580] [2024-09-21 11:28:31,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:31,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-21 11:28:31,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:31,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-21 11:28:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=3592, Unknown=0, NotChecked=0, Total=3782 [2024-09-21 11:28:31,516 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-21 11:28:32,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:32,641 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2024-09-21 11:28:32,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-21 11:28:32,642 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) Word has length 110 [2024-09-21 11:28:32,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:32,643 INFO L225 Difference]: With dead ends: 124 [2024-09-21 11:28:32,643 INFO L226 Difference]: Without dead ends: 122 [2024-09-21 11:28:32,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 193 SyntacticMatches, 25 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=218, Invalid=4072, Unknown=0, NotChecked=0, Total=4290 [2024-09-21 11:28:32,644 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 784 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:32,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 784 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-21 11:28:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-21 11:28:32,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 120. [2024-09-21 11:28:32,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 89 states have internal predecessors, (90), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 11:28:32,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2024-09-21 11:28:32,668 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 110 [2024-09-21 11:28:32,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:32,668 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2024-09-21 11:28:32,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 states have internal predecessors, (95), 26 states have call successors, (40), 4 states have call predecessors, (40), 2 states have return successors, (37), 25 states have call predecessors, (37), 25 states have call successors, (37) [2024-09-21 11:28:32,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:32,668 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2024-09-21 11:28:32,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-21 11:28:32,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:32,669 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:32,681 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-21 11:28:32,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-21 11:28:32,874 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:32,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -1102649716, now seen corresponding path program 20 times [2024-09-21 11:28:32,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:32,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779527156] [2024-09-21 11:28:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:32,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:32,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:33,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-21 11:28:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-21 11:28:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-21 11:28:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-21 11:28:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-21 11:28:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-21 11:28:33,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-21 11:28:33,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-21 11:28:33,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-21 11:28:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-21 11:28:33,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-21 11:28:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-21 11:28:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-21 11:28:33,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:33,294 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:28:33,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:33,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779527156] [2024-09-21 11:28:33,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779527156] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:33,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153782678] [2024-09-21 11:28:33,295 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 11:28:33,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:33,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:33,297 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:33,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-21 11:28:33,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 11:28:33,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:33,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-21 11:28:33,401 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:33,802 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:28:33,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:28:34,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153782678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:28:34,123 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:28:34,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2024-09-21 11:28:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203223917] [2024-09-21 11:28:34,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:34,123 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-21 11:28:34,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-21 11:28:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:28:34,124 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-21 11:28:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:28:34,310 INFO L93 Difference]: Finished difference Result 171 states and 186 transitions. [2024-09-21 11:28:34,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-21 11:28:34,311 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 117 [2024-09-21 11:28:34,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:28:34,312 INFO L225 Difference]: With dead ends: 171 [2024-09-21 11:28:34,312 INFO L226 Difference]: Without dead ends: 121 [2024-09-21 11:28:34,312 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 27 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1339 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=500, Invalid=1662, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 11:28:34,313 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:28:34,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 307 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 11:28:34,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-21 11:28:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2024-09-21 11:28:34,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 90 states have internal predecessors, (91), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-21 11:28:34,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2024-09-21 11:28:34,344 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2024-09-21 11:28:34,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:28:34,345 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2024-09-21 11:28:34,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-21 11:28:34,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:34,345 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2024-09-21 11:28:34,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-21 11:28:34,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:28:34,346 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:28:34,362 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-21 11:28:34,546 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:34,547 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:28:34,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:28:34,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1681033130, now seen corresponding path program 21 times [2024-09-21 11:28:34,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:28:34,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636262327] [2024-09-21 11:28:34,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:28:34,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:28:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:28:35,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-21 11:28:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-21 11:28:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-21 11:28:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-21 11:28:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-21 11:28:35,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-21 11:28:35,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-21 11:28:35,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-21 11:28:35,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-21 11:28:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-21 11:28:35,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-21 11:28:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-21 11:28:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-21 11:28:35,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:28:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:28:35,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:28:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636262327] [2024-09-21 11:28:35,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636262327] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:35,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108190829] [2024-09-21 11:28:35,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 11:28:35,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:28:35,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:28:35,225 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:28:35,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-21 11:28:35,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-21 11:28:35,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:28:35,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-21 11:28:35,996 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:28:36,391 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:28:39,848 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:28:39,848 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:28:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 247 proven. 144 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-21 11:28:39,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:28:40,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108190829] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:28:40,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:28:40,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 67 [2024-09-21 11:28:40,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416436613] [2024-09-21 11:28:40,127 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:28:40,127 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-21 11:28:40,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:28:40,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-21 11:28:40,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=4218, Unknown=0, NotChecked=0, Total=4692 [2024-09-21 11:28:40,128 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-21 11:28:44,969 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:49,095 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:53,225 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:28:57,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:01,489 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:05,683 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:09,860 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:14,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:18,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:22,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:26,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:30,709 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:29:31,109 INFO L93 Difference]: Finished difference Result 225 states and 229 transitions. [2024-09-21 11:29:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2024-09-21 11:29:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Word has length 118 [2024-09-21 11:29:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:29:31,111 INFO L225 Difference]: With dead ends: 225 [2024-09-21 11:29:31,111 INFO L226 Difference]: Without dead ends: 131 [2024-09-21 11:29:31,113 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 93 SyntacticMatches, 27 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=1005, Invalid=12567, Unknown=0, NotChecked=0, Total=13572 [2024-09-21 11:29:31,114 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 39 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 3285 mSolverCounterSat, 22 mSolverCounterUnsat, 12 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 3319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3285 IncrementalHoareTripleChecker+Invalid, 12 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 49.5s IncrementalHoareTripleChecker+Time [2024-09-21 11:29:31,114 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 596 Invalid, 3319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3285 Invalid, 12 Unknown, 0 Unchecked, 49.5s Time] [2024-09-21 11:29:31,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-21 11:29:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-21 11:29:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 96 states have internal predecessors, (97), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-21 11:29:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2024-09-21 11:29:31,144 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 118 [2024-09-21 11:29:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:29:31,145 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2024-09-21 11:29:31,145 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.5303030303030303) internal successors, (101), 65 states have internal predecessors, (101), 28 states have call successors, (30), 4 states have call predecessors, (30), 2 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-21 11:29:31,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:29:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2024-09-21 11:29:31,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-21 11:29:31,146 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:29:31,146 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:29:31,162 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-21 11:29:31,349 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-21 11:29:31,350 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:29:31,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:29:31,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1231766396, now seen corresponding path program 22 times [2024-09-21 11:29:31,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:29:31,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137911635] [2024-09-21 11:29:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:29:31,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:29:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:29:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-21 11:29:32,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-21 11:29:32,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-21 11:29:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-21 11:29:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-21 11:29:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-21 11:29:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-21 11:29:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-21 11:29:32,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-21 11:29:32,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-21 11:29:32,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-21 11:29:32,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-21 11:29:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-21 11:29:32,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-21 11:29:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:29:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-21 11:29:32,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:29:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137911635] [2024-09-21 11:29:32,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137911635] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:29:32,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034860893] [2024-09-21 11:29:32,126 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 11:29:32,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:29:32,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:29:32,128 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:29:32,129 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-21 11:29:32,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 11:29:32,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:29:32,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-21 11:29:32,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:29:33,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2024-09-21 11:29:36,391 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-09-21 11:29:36,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2024-09-21 11:29:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 287 proven. 162 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-21 11:29:36,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:29:36,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034860893] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:29:36,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-21 11:29:36,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 38] total 71 [2024-09-21 11:29:36,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060440709] [2024-09-21 11:29:36,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-21 11:29:36,640 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2024-09-21 11:29:36,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:29:36,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2024-09-21 11:29:36,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=4728, Unknown=0, NotChecked=0, Total=5256 [2024-09-21 11:29:36,641 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-21 11:29:41,487 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:45,600 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:49,737 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:53,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:29:58,038 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:02,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:06,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:10,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:14,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:18,779 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:22,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:27,048 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:31,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-09-21 11:30:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:30:31,877 INFO L93 Difference]: Finished difference Result 240 states and 244 transitions. [2024-09-21 11:30:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-21 11:30:31,881 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Word has length 126 [2024-09-21 11:30:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:30:31,882 INFO L225 Difference]: With dead ends: 240 [2024-09-21 11:30:31,882 INFO L226 Difference]: Without dead ends: 139 [2024-09-21 11:30:31,883 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 99 SyntacticMatches, 29 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3202 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1108, Invalid=14144, Unknown=0, NotChecked=0, Total=15252 [2024-09-21 11:30:31,883 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 73 mSDsluCounter, 435 mSDsCounter, 0 mSdLazyCounter, 2684 mSolverCounterSat, 36 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 2684 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.4s IncrementalHoareTripleChecker+Time [2024-09-21 11:30:31,884 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 462 Invalid, 2733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 2684 Invalid, 13 Unknown, 0 Unchecked, 53.4s Time] [2024-09-21 11:30:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-21 11:30:31,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2024-09-21 11:30:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 102 states have internal predecessors, (103), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-21 11:30:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2024-09-21 11:30:31,940 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 126 [2024-09-21 11:30:31,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:30:31,940 INFO L474 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2024-09-21 11:30:31,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.5285714285714285) internal successors, (107), 69 states have internal predecessors, (107), 30 states have call successors, (32), 4 states have call predecessors, (32), 2 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-21 11:30:31,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:30:31,941 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2024-09-21 11:30:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-21 11:30:31,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:30:31,941 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:30:31,956 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-21 11:30:32,144 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-21 11:30:32,144 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:30:32,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:30:32,144 INFO L85 PathProgramCache]: Analyzing trace with hash 191035754, now seen corresponding path program 23 times [2024-09-21 11:30:32,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:30:32,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030824463] [2024-09-21 11:30:32,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:30:32,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:30:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 11:30:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-21 11:30:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-21 11:30:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-21 11:30:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-21 11:30:32,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-21 11:30:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-21 11:30:32,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-21 11:30:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-21 11:30:32,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-21 11:30:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-21 11:30:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-21 11:30:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-21 11:30:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-21 11:30:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-21 11:30:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-21 11:30:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 11:30:32,993 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:30:32,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 11:30:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030824463] [2024-09-21 11:30:32,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030824463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 11:30:32,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579773655] [2024-09-21 11:30:32,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 11:30:32,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 11:30:32,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 11:30:32,995 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 11:30:32,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-21 11:30:33,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-21 11:30:33,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 11:30:33,295 INFO L262 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-09-21 11:30:33,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 11:30:33,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-09-21 11:30:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 511 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:30:35,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 11:30:36,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2024-09-21 11:30:36,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2024-09-21 11:30:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-21 11:30:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579773655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 11:30:36,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 11:30:36,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39, 38] total 75 [2024-09-21 11:30:36,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327920515] [2024-09-21 11:30:36,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 11:30:36,159 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-21 11:30:36,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 11:30:36,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-21 11:30:36,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=5316, Unknown=0, NotChecked=0, Total=5550 [2024-09-21 11:30:36,160 INFO L87 Difference]: Start difference. First operand 137 states and 138 transitions. Second operand has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-21 11:30:37,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 11:30:37,387 INFO L93 Difference]: Finished difference Result 148 states and 149 transitions. [2024-09-21 11:30:37,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-21 11:30:37,387 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) Word has length 134 [2024-09-21 11:30:37,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 11:30:37,388 INFO L225 Difference]: With dead ends: 148 [2024-09-21 11:30:37,388 INFO L226 Difference]: Without dead ends: 146 [2024-09-21 11:30:37,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 234 SyntacticMatches, 31 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1783 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=262, Invalid=5900, Unknown=0, NotChecked=0, Total=6162 [2024-09-21 11:30:37,389 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 4037 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 968 SdHoareTripleChecker+Invalid, 4046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 4037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-21 11:30:37,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 968 Invalid, 4046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 4037 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-21 11:30:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-21 11:30:37,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2024-09-21 11:30:37,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 107 states have internal predecessors, (108), 19 states have call successors, (19), 19 states have call predecessors, (19), 18 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-21 11:30:37,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2024-09-21 11:30:37,432 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 134 [2024-09-21 11:30:37,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 11:30:37,432 INFO L474 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2024-09-21 11:30:37,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5675675675675675) internal successors, (116), 73 states have internal predecessors, (116), 33 states have call successors, (35), 4 states have call predecessors, (35), 2 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-21 11:30:37,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:30:37,432 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2024-09-21 11:30:37,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2024-09-21 11:30:37,433 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 11:30:37,433 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 11:30:37,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-21 11:30:37,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-21 11:30:37,634 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 11:30:37,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 11:30:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -2060732770, now seen corresponding path program 24 times [2024-09-21 11:30:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 11:30:37,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549548710] [2024-09-21 11:30:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 11:30:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 11:30:37,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat