./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version fb1cb0b9 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:52:50,730 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:52:50,811 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:52:50,817 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:52:50,818 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:52:50,844 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:52:50,847 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:52:50,847 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:52:50,848 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:52:50,848 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:52:50,849 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:52:50,849 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:52:50,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:52:50,852 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:52:50,852 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:52:50,853 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:52:50,853 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:52:50,853 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:52:50,853 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:52:50,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:52:50,857 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:52:50,857 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:52:50,858 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:52:50,858 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:52:50,858 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:52:50,858 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:52:50,859 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:52:50,859 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:52:50,859 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:52:50,859 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:52:50,860 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:52:50,860 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:52:50,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:52:50,860 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:52:50,860 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:52:50,861 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:52:50,861 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:52:50,864 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:52:50,865 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:52:50,865 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:52:50,866 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:52:50,866 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:52:50,866 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 -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:52:51,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:52:51,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:52:51,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:52:51,214 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:52:51,214 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:52:51,215 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-09-25 10:52:52,719 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:52:52,933 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:52:52,933 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2024-09-25 10:52:52,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/5c5d16b41/cbe052712184479a889ea4fca173c1ca/FLAG7b1fee52c [2024-09-25 10:52:52,965 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/5c5d16b41/cbe052712184479a889ea4fca173c1ca [2024-09-25 10:52:52,970 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:52:52,971 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:52:52,974 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:52:52,975 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:52:52,980 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:52:52,980 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:52:52" (1/1) ... [2024-09-25 10:52:52,981 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e0fcbb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:52, skipping insertion in model container [2024-09-25 10:52:52,981 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:52:52" (1/1) ... [2024-09-25 10:52:53,001 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:52:53,161 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-09-25 10:52:53,191 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:52:53,205 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:52:53,215 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c[490,503] [2024-09-25 10:52:53,229 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:52:53,249 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:52:53,250 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53 WrapperNode [2024-09-25 10:52:53,250 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:52:53,251 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:52:53,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:52:53,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:52:53,257 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,276 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:52:53,277 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:52:53,277 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:52:53,277 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:52:53,277 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:52:53,297 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,297 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,299 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,314 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-25 10:52:53,315 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,315 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,318 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,322 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,324 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,325 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,329 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:52:53,330 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:52:53,331 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:52:53,331 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:52:53,331 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (1/1) ... [2024-09-25 10:52:53,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:52:53,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:53,363 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 10:52:53,365 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 10:52:53,401 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:52:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 10:52:53,402 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 10:52:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:52:53,402 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:52:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:52:53,402 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:52:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:52:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:52:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:52:53,403 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:52:53,403 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:52:53,459 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:52:53,462 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:52:53,674 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-25 10:52:53,678 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:52:53,709 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:52:53,710 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:52:53,710 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:52:53 BoogieIcfgContainer [2024-09-25 10:52:53,710 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:52:53,714 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:52:53,714 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:52:53,718 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:52:53,718 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:52:52" (1/3) ... [2024-09-25 10:52:53,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f79517a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:52:53, skipping insertion in model container [2024-09-25 10:52:53,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:52:53" (2/3) ... [2024-09-25 10:52:53,719 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f79517a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:52:53, skipping insertion in model container [2024-09-25 10:52:53,719 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:52:53" (3/3) ... [2024-09-25 10:52:53,721 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2024-09-25 10:52:53,739 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:52:53,739 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:52:53,813 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:52:53,820 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;@3f40238d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:52:53,821 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:52:53,825 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:52:53,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-25 10:52:53,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:53,834 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:53,835 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:53,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:53,840 INFO L85 PathProgramCache]: Analyzing trace with hash -2011850563, now seen corresponding path program 1 times [2024-09-25 10:52:53,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:53,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441271199] [2024-09-25 10:52:53,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:53,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:53,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:54,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:52:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:52:54,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,073 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:52:54,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:54,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441271199] [2024-09-25 10:52:54,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441271199] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:54,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:54,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 10:52:54,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464768966] [2024-09-25 10:52:54,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:54,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 10:52:54,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:54,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 10:52:54,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:52:54,107 INFO L87 Difference]: Start difference. First operand has 38 states, 18 states have (on average 1.5) internal successors, (27), 20 states have internal predecessors, (27), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:52:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:54,140 INFO L93 Difference]: Finished difference Result 70 states and 115 transitions. [2024-09-25 10:52:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 10:52:54,149 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 42 [2024-09-25 10:52:54,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:54,157 INFO L225 Difference]: With dead ends: 70 [2024-09-25 10:52:54,166 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 10:52:54,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 10:52:54,177 INFO L434 NwaCegarLoop]: 47 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, 47 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:54,179 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 47 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:54,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 10:52:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-25 10:52:54,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 10:52:54,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2024-09-25 10:52:54,220 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 42 [2024-09-25 10:52:54,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:54,222 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2024-09-25 10:52:54,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 10:52:54,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:54,224 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2024-09-25 10:52:54,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-25 10:52:54,227 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:54,227 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:54,227 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:52:54,228 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:54,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:54,228 INFO L85 PathProgramCache]: Analyzing trace with hash -213832741, now seen corresponding path program 1 times [2024-09-25 10:52:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:54,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268923380] [2024-09-25 10:52:54,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:54,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:54,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:52:54,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:52:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:52:54,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268923380] [2024-09-25 10:52:54,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268923380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:54,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031015996] [2024-09-25 10:52:54,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:54,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:54,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:54,606 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:54,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:52:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:54,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-25 10:52:54,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-25 10:52:54,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:55,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031015996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:55,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:52:55,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 11 [2024-09-25 10:52:55,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207118329] [2024-09-25 10:52:55,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:55,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-25 10:52:55,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:55,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-25 10:52:55,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:52:55,059 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-25 10:52:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:55,324 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2024-09-25 10:52:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:52:55,325 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 43 [2024-09-25 10:52:55,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:55,326 INFO L225 Difference]: With dead ends: 55 [2024-09-25 10:52:55,326 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 10:52:55,327 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:52:55,328 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:55,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 233 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:52:55,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 10:52:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-25 10:52:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 18 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:52:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 61 transitions. [2024-09-25 10:52:55,353 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 61 transitions. Word has length 43 [2024-09-25 10:52:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:55,354 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 61 transitions. [2024-09-25 10:52:55,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 6 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2024-09-25 10:52:55,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 61 transitions. [2024-09-25 10:52:55,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 10:52:55,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:55,355 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:55,375 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:55,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:55,557 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:55,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1967462229, now seen corresponding path program 1 times [2024-09-25 10:52:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:55,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889811378] [2024-09-25 10:52:55,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:55,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:55,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570338723] [2024-09-25 10:52:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:55,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:55,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:55,590 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:55,591 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:52:55,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:55,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:52:55,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:55,684 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:52:55,684 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:55,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:55,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889811378] [2024-09-25 10:52:55,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:55,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570338723] [2024-09-25 10:52:55,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570338723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:55,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:55,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:55,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186872780] [2024-09-25 10:52:55,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:55,690 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:55,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:55,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:55,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:55,691 INFO L87 Difference]: Start difference. First operand 46 states and 61 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-25 10:52:55,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:55,761 INFO L93 Difference]: Finished difference Result 65 states and 89 transitions. [2024-09-25 10:52:55,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:55,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 44 [2024-09-25 10:52:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:55,763 INFO L225 Difference]: With dead ends: 65 [2024-09-25 10:52:55,763 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 10:52:55,763 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:55,764 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 4 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:55,765 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 144 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:55,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 10:52:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2024-09-25 10:52:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:52:55,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2024-09-25 10:52:55,789 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 44 [2024-09-25 10:52:55,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:55,790 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2024-09-25 10:52:55,790 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2024-09-25 10:52:55,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:55,790 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2024-09-25 10:52:55,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 10:52:55,799 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:55,800 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:55,819 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:56,000 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:56,001 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:56,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:56,001 INFO L85 PathProgramCache]: Analyzing trace with hash -189867411, now seen corresponding path program 1 times [2024-09-25 10:52:56,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:56,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135798151] [2024-09-25 10:52:56,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:56,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:56,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269213405] [2024-09-25 10:52:56,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:56,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:56,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:56,036 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:56,038 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:52:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:56,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:52:56,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:56,201 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:52:56,201 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:56,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:56,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135798151] [2024-09-25 10:52:56,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:56,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269213405] [2024-09-25 10:52:56,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269213405] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:56,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:56,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:56,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828061043] [2024-09-25 10:52:56,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:56,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:56,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:56,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:56,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:56,205 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:56,259 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2024-09-25 10:52:56,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:56,263 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2024-09-25 10:52:56,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:56,266 INFO L225 Difference]: With dead ends: 61 [2024-09-25 10:52:56,266 INFO L226 Difference]: Without dead ends: 59 [2024-09-25 10:52:56,266 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:56,267 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:56,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 154 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:52:56,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-25 10:52:56,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2024-09-25 10:52:56,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:52:56,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 73 transitions. [2024-09-25 10:52:56,285 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 73 transitions. Word has length 49 [2024-09-25 10:52:56,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:56,286 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 73 transitions. [2024-09-25 10:52:56,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-25 10:52:56,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:56,287 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 73 transitions. [2024-09-25 10:52:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-25 10:52:56,288 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:56,288 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:56,305 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-25 10:52:56,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:56,490 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:56,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:56,490 INFO L85 PathProgramCache]: Analyzing trace with hash -470549715, now seen corresponding path program 1 times [2024-09-25 10:52:56,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:56,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249552636] [2024-09-25 10:52:56,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:56,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:56,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:56,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [343357649] [2024-09-25 10:52:56,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:56,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:56,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:56,515 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:56,519 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:52:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:56,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:52:56,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-25 10:52:56,736 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:52:56,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:56,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249552636] [2024-09-25 10:52:56,737 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343357649] [2024-09-25 10:52:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343357649] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:52:56,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:52:56,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:52:56,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084349866] [2024-09-25 10:52:56,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:52:56,739 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:52:56,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:56,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:52:56,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:52:56,741 INFO L87 Difference]: Start difference. First operand 58 states and 73 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-25 10:52:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:56,840 INFO L93 Difference]: Finished difference Result 65 states and 79 transitions. [2024-09-25 10:52:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:52:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2024-09-25 10:52:56,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:56,842 INFO L225 Difference]: With dead ends: 65 [2024-09-25 10:52:56,842 INFO L226 Difference]: Without dead ends: 63 [2024-09-25 10:52:56,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:52:56,843 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:56,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 141 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:56,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-25 10:52:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2024-09-25 10:52:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 10:52:56,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-25 10:52:56,857 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 59 [2024-09-25 10:52:56,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:56,858 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-25 10:52:56,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-25 10:52:56,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:56,858 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-25 10:52:56,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-25 10:52:56,860 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:56,860 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:56,883 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:52:57,064 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:57,065 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:57,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:57,066 INFO L85 PathProgramCache]: Analyzing trace with hash 487403380, now seen corresponding path program 1 times [2024-09-25 10:52:57,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:57,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839065477] [2024-09-25 10:52:57,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:57,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:57,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186943973] [2024-09-25 10:52:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:57,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:57,091 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:57,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:52:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 10:52:57,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:52:57,252 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:57,346 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-25 10:52:57,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839065477] [2024-09-25 10:52:57,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:57,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186943973] [2024-09-25 10:52:57,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186943973] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:52:57,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:52:57,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2024-09-25 10:52:57,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852198252] [2024-09-25 10:52:57,348 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:57,349 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:52:57,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:57,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:52:57,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:52:57,351 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-25 10:52:57,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:57,487 INFO L93 Difference]: Finished difference Result 90 states and 121 transitions. [2024-09-25 10:52:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-25 10:52:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 66 [2024-09-25 10:52:57,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:57,491 INFO L225 Difference]: With dead ends: 90 [2024-09-25 10:52:57,492 INFO L226 Difference]: Without dead ends: 88 [2024-09-25 10:52:57,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:52:57,493 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:57,495 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-25 10:52:57,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 58. [2024-09-25 10:52:57,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-25 10:52:57,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 70 transitions. [2024-09-25 10:52:57,523 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 70 transitions. Word has length 66 [2024-09-25 10:52:57,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:57,525 INFO L474 AbstractCegarLoop]: Abstraction has 58 states and 70 transitions. [2024-09-25 10:52:57,525 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-25 10:52:57,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:57,526 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 70 transitions. [2024-09-25 10:52:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-25 10:52:57,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:57,528 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:57,545 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-25 10:52:57,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 10:52:57,729 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:57,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash -2098403842, now seen corresponding path program 1 times [2024-09-25 10:52:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382136780] [2024-09-25 10:52:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:57,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:52:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:52:57,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:52:57,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:52:57,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:52:57,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:52:57,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:52:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:52:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:52:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:52:57,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:52:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-25 10:52:57,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382136780] [2024-09-25 10:52:57,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382136780] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:57,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083084889] [2024-09-25 10:52:57,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:57,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:57,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:57,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:57,924 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:52:57,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:57,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:52:57,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-25 10:52:58,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:58,137 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2024-09-25 10:52:58,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083084889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:52:58,138 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:52:58,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 9 [2024-09-25 10:52:58,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484399841] [2024-09-25 10:52:58,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:58,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:52:58,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:58,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:52:58,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:52:58,142 INFO L87 Difference]: Start difference. First operand 58 states and 70 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-25 10:52:58,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:58,346 INFO L93 Difference]: Finished difference Result 105 states and 145 transitions. [2024-09-25 10:52:58,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:52:58,347 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2024-09-25 10:52:58,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:58,348 INFO L225 Difference]: With dead ends: 105 [2024-09-25 10:52:58,354 INFO L226 Difference]: Without dead ends: 97 [2024-09-25 10:52:58,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 153 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:52:58,355 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 32 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:58,355 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 311 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:58,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-25 10:52:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 88. [2024-09-25 10:52:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2024-09-25 10:52:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2024-09-25 10:52:58,397 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 68 [2024-09-25 10:52:58,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:58,397 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2024-09-25 10:52:58,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-25 10:52:58,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:58,398 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2024-09-25 10:52:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-25 10:52:58,400 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:58,400 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:58,416 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:52:58,600 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:58,601 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:58,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:58,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1520512592, now seen corresponding path program 1 times [2024-09-25 10:52:58,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:58,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367400813] [2024-09-25 10:52:58,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:58,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:58,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:58,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1114600661] [2024-09-25 10:52:58,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:58,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:58,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:58,622 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:58,625 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:52:58,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:52:58,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-25 10:52:58,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:58,803 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-25 10:52:58,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:58,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367400813] [2024-09-25 10:52:58,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:58,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114600661] [2024-09-25 10:52:58,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114600661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:58,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:52:58,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2024-09-25 10:52:58,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646248660] [2024-09-25 10:52:58,853 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:58,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:52:58,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:58,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:52:58,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:52:58,854 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 10:52:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:58,984 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-25 10:52:58,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:52:58,985 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 74 [2024-09-25 10:52:58,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:58,986 INFO L225 Difference]: With dead ends: 123 [2024-09-25 10:52:58,987 INFO L226 Difference]: Without dead ends: 120 [2024-09-25 10:52:58,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-09-25 10:52:58,987 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:58,988 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-25 10:52:59,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2024-09-25 10:52:59,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 63 states have internal predecessors, (74), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-25 10:52:59,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 165 transitions. [2024-09-25 10:52:59,040 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 165 transitions. Word has length 74 [2024-09-25 10:52:59,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:59,041 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 165 transitions. [2024-09-25 10:52:59,041 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-25 10:52:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:59,042 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 165 transitions. [2024-09-25 10:52:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-25 10:52:59,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:59,042 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:59,061 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 10:52:59,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:59,250 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:52:59,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:59,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1071513618, now seen corresponding path program 2 times [2024-09-25 10:52:59,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:52:59,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541331144] [2024-09-25 10:52:59,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:52:59,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:52:59,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:52:59,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [41354988] [2024-09-25 10:52:59,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:52:59,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:52:59,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:52:59,273 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:52:59,275 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-25 10:52:59,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:52:59,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:52:59,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 10:52:59,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:52:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-25 10:52:59,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:52:59,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:52:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541331144] [2024-09-25 10:52:59,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:52:59,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41354988] [2024-09-25 10:52:59,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41354988] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:52:59,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:52:59,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-25 10:52:59,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737416499] [2024-09-25 10:52:59,674 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:52:59,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 10:52:59,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:52:59,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 10:52:59,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:52:59,676 INFO L87 Difference]: Start difference. First operand 117 states and 165 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-25 10:52:59,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:52:59,860 INFO L93 Difference]: Finished difference Result 129 states and 175 transitions. [2024-09-25 10:52:59,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:52:59,861 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2024-09-25 10:52:59,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:52:59,862 INFO L225 Difference]: With dead ends: 129 [2024-09-25 10:52:59,862 INFO L226 Difference]: Without dead ends: 127 [2024-09-25 10:52:59,863 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:52:59,863 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:52:59,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 229 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:52:59,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-25 10:52:59,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2024-09-25 10:52:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 69 states have internal predecessors, (80), 47 states have call successors, (47), 11 states have call predecessors, (47), 10 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-25 10:52:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 171 transitions. [2024-09-25 10:52:59,893 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 171 transitions. Word has length 79 [2024-09-25 10:52:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:52:59,894 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 171 transitions. [2024-09-25 10:52:59,894 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2024-09-25 10:52:59,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:52:59,895 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 171 transitions. [2024-09-25 10:52:59,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-25 10:52:59,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:52:59,896 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:52:59,913 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-25 10:53:00,100 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:00,101 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:00,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:00,101 INFO L85 PathProgramCache]: Analyzing trace with hash 807735120, now seen corresponding path program 3 times [2024-09-25 10:53:00,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:00,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981464004] [2024-09-25 10:53:00,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:00,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:00,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:00,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [827426423] [2024-09-25 10:53:00,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:53:00,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:00,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:00,132 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:53:00,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-25 10:53:00,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:53:00,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:00,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-25 10:53:00,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 48 proven. 27 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2024-09-25 10:53:01,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:14,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:14,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981464004] [2024-09-25 10:53:14,073 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:14,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827426423] [2024-09-25 10:53:14,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827426423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:14,074 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:14,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 10:53:14,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571003048] [2024-09-25 10:53:14,074 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:14,074 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:53:14,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:14,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:53:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=539, Unknown=1, NotChecked=0, Total=650 [2024-09-25 10:53:14,075 INFO L87 Difference]: Start difference. First operand 125 states and 171 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-25 10:53:14,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:14,519 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2024-09-25 10:53:14,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:53:14,520 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) Word has length 84 [2024-09-25 10:53:14,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:14,521 INFO L225 Difference]: With dead ends: 133 [2024-09-25 10:53:14,521 INFO L226 Difference]: Without dead ends: 131 [2024-09-25 10:53:14,522 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=163, Invalid=706, Unknown=1, NotChecked=0, Total=870 [2024-09-25 10:53:14,522 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 32 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:14,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 271 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:53:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-25 10:53:14,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2024-09-25 10:53:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 70 states have (on average 1.1857142857142857) internal successors, (83), 72 states have internal predecessors, (83), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2024-09-25 10:53:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 174 transitions. [2024-09-25 10:53:14,561 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 174 transitions. Word has length 84 [2024-09-25 10:53:14,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:14,561 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 174 transitions. [2024-09-25 10:53:14,562 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2024-09-25 10:53:14,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:14,562 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 174 transitions. [2024-09-25 10:53:14,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-25 10:53:14,565 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:14,565 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:14,583 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-25 10:53:14,765 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 10:53:14,766 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:14,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:14,766 INFO L85 PathProgramCache]: Analyzing trace with hash -607760099, now seen corresponding path program 1 times [2024-09-25 10:53:14,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:14,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204297078] [2024-09-25 10:53:14,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:14,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:14,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728495372] [2024-09-25 10:53:14,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:14,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:14,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:14,790 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) [2024-09-25 10:53:14,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-25 10:53:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:14,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-25 10:53:14,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2024-09-25 10:53:15,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:16,027 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-25 10:53:16,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204297078] [2024-09-25 10:53:16,028 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:16,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728495372] [2024-09-25 10:53:16,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728495372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:53:16,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:53:16,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2024-09-25 10:53:16,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304776770] [2024-09-25 10:53:16,028 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:16,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:53:16,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:16,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:53:16,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:53:16,030 INFO L87 Difference]: Start difference. First operand 129 states and 174 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 10:53:18,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:18,672 INFO L93 Difference]: Finished difference Result 229 states and 337 transitions. [2024-09-25 10:53:18,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-25 10:53:18,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 90 [2024-09-25 10:53:18,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:18,676 INFO L225 Difference]: With dead ends: 229 [2024-09-25 10:53:18,676 INFO L226 Difference]: Without dead ends: 225 [2024-09-25 10:53:18,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=255, Invalid=1151, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:53:18,677 INFO L434 NwaCegarLoop]: 48 mSDtfsCounter, 75 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:18,677 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 451 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 10:53:18,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-25 10:53:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2024-09-25 10:53:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 112 states have (on average 1.2410714285714286) internal successors, (139), 115 states have internal predecessors, (139), 96 states have call successors, (96), 14 states have call predecessors, (96), 13 states have return successors, (93), 92 states have call predecessors, (93), 93 states have call successors, (93) [2024-09-25 10:53:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 328 transitions. [2024-09-25 10:53:18,757 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 328 transitions. Word has length 90 [2024-09-25 10:53:18,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:18,757 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 328 transitions. [2024-09-25 10:53:18,757 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (29), 3 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 10:53:18,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:18,758 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 328 transitions. [2024-09-25 10:53:18,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-25 10:53:18,758 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:18,759 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:18,776 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-25 10:53:18,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-25 10:53:18,959 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:18,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:18,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1117188045, now seen corresponding path program 4 times [2024-09-25 10:53:18,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:18,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603787647] [2024-09-25 10:53:18,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:18,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:53:19,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:53:19,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:53:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:53:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:53:19,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:53:19,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:53:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:53:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:53:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:53:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:53:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:53:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:53:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:53:19,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:53:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-25 10:53:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2024-09-25 10:53:19,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:19,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603787647] [2024-09-25 10:53:19,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603787647] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:53:19,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:53:19,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:53:19,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183652639] [2024-09-25 10:53:19,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:53:19,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:53:19,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:19,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:53:19,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:53:19,121 INFO L87 Difference]: Start difference. First operand 222 states and 328 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 10:53:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:19,260 INFO L93 Difference]: Finished difference Result 275 states and 404 transitions. [2024-09-25 10:53:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:53:19,260 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 99 [2024-09-25 10:53:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:19,262 INFO L225 Difference]: With dead ends: 275 [2024-09-25 10:53:19,262 INFO L226 Difference]: Without dead ends: 201 [2024-09-25 10:53:19,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:53:19,264 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:19,264 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 179 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:53:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-25 10:53:19,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 189. [2024-09-25 10:53:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 95 states have (on average 1.1789473684210525) internal successors, (112), 98 states have internal predecessors, (112), 80 states have call successors, (80), 14 states have call predecessors, (80), 13 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-25 10:53:19,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 269 transitions. [2024-09-25 10:53:19,348 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 269 transitions. Word has length 99 [2024-09-25 10:53:19,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:19,349 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 269 transitions. [2024-09-25 10:53:19,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 10:53:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:19,351 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 269 transitions. [2024-09-25 10:53:19,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2024-09-25 10:53:19,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:19,352 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:19,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-09-25 10:53:19,353 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:19,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:19,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2069519471, now seen corresponding path program 1 times [2024-09-25 10:53:19,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:19,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552599001] [2024-09-25 10:53:19,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:19,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:19,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313453052] [2024-09-25 10:53:19,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:19,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:19,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:19,386 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) [2024-09-25 10:53:19,397 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-25 10:53:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:19,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-25 10:53:19,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2024-09-25 10:53:20,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:20,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552599001] [2024-09-25 10:53:20,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:20,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313453052] [2024-09-25 10:53:20,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313453052] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:20,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:20,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 10:53:20,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723811399] [2024-09-25 10:53:20,648 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:20,648 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:53:20,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:20,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:53:20,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:53:20,649 INFO L87 Difference]: Start difference. First operand 189 states and 269 transitions. Second operand has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-25 10:53:21,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:21,295 INFO L93 Difference]: Finished difference Result 201 states and 279 transitions. [2024-09-25 10:53:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 10:53:21,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) Word has length 106 [2024-09-25 10:53:21,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:21,300 INFO L225 Difference]: With dead ends: 201 [2024-09-25 10:53:21,303 INFO L226 Difference]: Without dead ends: 199 [2024-09-25 10:53:21,303 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:53:21,304 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 40 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:21,304 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 352 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:53:21,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2024-09-25 10:53:21,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2024-09-25 10:53:21,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 101 states have (on average 1.1683168316831682) internal successors, (118), 104 states have internal predecessors, (118), 80 states have call successors, (80), 16 states have call predecessors, (80), 15 states have return successors, (77), 76 states have call predecessors, (77), 77 states have call successors, (77) [2024-09-25 10:53:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 275 transitions. [2024-09-25 10:53:21,387 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 275 transitions. Word has length 106 [2024-09-25 10:53:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:21,387 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 275 transitions. [2024-09-25 10:53:21,387 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 7 states have call successors, (18) [2024-09-25 10:53:21,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 275 transitions. [2024-09-25 10:53:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 10:53:21,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:21,389 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:21,406 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-25 10:53:21,589 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 [2024-09-25 10:53:21,590 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:21,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:21,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1527784632, now seen corresponding path program 1 times [2024-09-25 10:53:21,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:21,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464281933] [2024-09-25 10:53:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:21,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:53:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:53:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 10:53:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 10:53:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-25 10:53:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-25 10:53:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-25 10:53:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 10:53:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 10:53:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:53:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:53:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-25 10:53:21,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 10:53:21,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 10:53:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-25 10:53:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 10:53:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 10:53:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-25 10:53:21,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-25 10:53:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 10:53:21,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,783 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-25 10:53:21,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464281933] [2024-09-25 10:53:21,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464281933] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:21,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140408055] [2024-09-25 10:53:21,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:21,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:21,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:21,785 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) [2024-09-25 10:53:21,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-25 10:53:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:53:21,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:53:21,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 88 proven. 9 refuted. 0 times theorem prover too weak. 326 trivial. 0 not checked. [2024-09-25 10:53:21,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:21,966 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 42 proven. 9 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-25 10:53:21,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140408055] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:53:21,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:53:21,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-25 10:53:21,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218017736] [2024-09-25 10:53:21,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:21,967 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:53:21,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:21,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:53:21,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:53:21,968 INFO L87 Difference]: Start difference. First operand 197 states and 275 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-25 10:53:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:22,167 INFO L93 Difference]: Finished difference Result 227 states and 317 transitions. [2024-09-25 10:53:22,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 10:53:22,168 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) Word has length 120 [2024-09-25 10:53:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:22,170 INFO L225 Difference]: With dead ends: 227 [2024-09-25 10:53:22,170 INFO L226 Difference]: Without dead ends: 215 [2024-09-25 10:53:22,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 278 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:53:22,171 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 17 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:22,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 337 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:53:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2024-09-25 10:53:22,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 196. [2024-09-25 10:53:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 101 states have (on average 1.1584158415841583) internal successors, (117), 103 states have internal predecessors, (117), 79 states have call successors, (79), 16 states have call predecessors, (79), 15 states have return successors, (76), 76 states have call predecessors, (76), 76 states have call successors, (76) [2024-09-25 10:53:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 272 transitions. [2024-09-25 10:53:22,244 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 272 transitions. Word has length 120 [2024-09-25 10:53:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:22,244 INFO L474 AbstractCegarLoop]: Abstraction has 196 states and 272 transitions. [2024-09-25 10:53:22,244 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 4 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 4 states have call predecessors, (21), 4 states have call successors, (21) [2024-09-25 10:53:22,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:22,245 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 272 transitions. [2024-09-25 10:53:22,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-25 10:53:22,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:22,246 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:22,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-25 10:53:22,447 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 [2024-09-25 10:53:22,447 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:22,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:22,447 INFO L85 PathProgramCache]: Analyzing trace with hash -2141824020, now seen corresponding path program 2 times [2024-09-25 10:53:22,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:22,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588390071] [2024-09-25 10:53:22,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:22,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:22,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235515984] [2024-09-25 10:53:22,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:53:22,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:22,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:22,473 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) [2024-09-25 10:53:22,475 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-25 10:53:22,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:53:22,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:22,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-25 10:53:22,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-25 10:53:22,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:22,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588390071] [2024-09-25 10:53:22,978 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:22,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235515984] [2024-09-25 10:53:22,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235515984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:22,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:22,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2024-09-25 10:53:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204587479] [2024-09-25 10:53:22,979 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:22,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 10:53:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 10:53:22,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:53:22,980 INFO L87 Difference]: Start difference. First operand 196 states and 272 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-25 10:53:23,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:23,234 INFO L93 Difference]: Finished difference Result 230 states and 321 transitions. [2024-09-25 10:53:23,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:53:23,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 121 [2024-09-25 10:53:23,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:23,237 INFO L225 Difference]: With dead ends: 230 [2024-09-25 10:53:23,237 INFO L226 Difference]: Without dead ends: 227 [2024-09-25 10:53:23,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 169 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:53:23,238 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 23 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:23,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 290 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:53:23,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-25 10:53:23,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2024-09-25 10:53:23,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 116 states have (on average 1.1637931034482758) internal successors, (135), 118 states have internal predecessors, (135), 91 states have call successors, (91), 17 states have call predecessors, (91), 16 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-25 10:53:23,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 314 transitions. [2024-09-25 10:53:23,322 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 314 transitions. Word has length 121 [2024-09-25 10:53:23,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:23,323 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 314 transitions. [2024-09-25 10:53:23,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-25 10:53:23,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:23,323 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 314 transitions. [2024-09-25 10:53:23,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-25 10:53:23,324 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:23,325 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:23,341 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-25 10:53:23,525 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 [2024-09-25 10:53:23,525 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:23,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:23,526 INFO L85 PathProgramCache]: Analyzing trace with hash -669028268, now seen corresponding path program 3 times [2024-09-25 10:53:23,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:23,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621319682] [2024-09-25 10:53:23,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:23,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:23,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:23,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406205240] [2024-09-25 10:53:23,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:53:23,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:23,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:23,549 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) [2024-09-25 10:53:23,556 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-25 10:53:23,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:53:23,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:23,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-25 10:53:23,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-25 10:53:24,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2024-09-25 10:53:24,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:24,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621319682] [2024-09-25 10:53:24,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:24,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406205240] [2024-09-25 10:53:24,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406205240] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:53:24,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:53:24,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2024-09-25 10:53:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414085368] [2024-09-25 10:53:24,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:24,556 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:53:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:24,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:53:24,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:53:24,557 INFO L87 Difference]: Start difference. First operand 224 states and 314 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-25 10:53:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:25,702 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2024-09-25 10:53:25,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:53:25,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) Word has length 123 [2024-09-25 10:53:25,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:25,704 INFO L225 Difference]: With dead ends: 253 [2024-09-25 10:53:25,704 INFO L226 Difference]: Without dead ends: 251 [2024-09-25 10:53:25,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2024-09-25 10:53:25,705 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 44 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:25,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 429 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-25 10:53:25,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2024-09-25 10:53:25,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 228. [2024-09-25 10:53:25,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 119 states have (on average 1.1596638655462186) internal successors, (138), 121 states have internal predecessors, (138), 91 states have call successors, (91), 18 states have call predecessors, (91), 17 states have return successors, (88), 88 states have call predecessors, (88), 88 states have call successors, (88) [2024-09-25 10:53:25,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 317 transitions. [2024-09-25 10:53:25,805 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 317 transitions. Word has length 123 [2024-09-25 10:53:25,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:25,805 INFO L474 AbstractCegarLoop]: Abstraction has 228 states and 317 transitions. [2024-09-25 10:53:25,805 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 11 states have call predecessors, (37), 13 states have call successors, (37) [2024-09-25 10:53:25,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:25,806 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 317 transitions. [2024-09-25 10:53:25,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-25 10:53:25,807 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:25,807 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:25,824 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-25 10:53:26,007 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 [2024-09-25 10:53:26,008 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:26,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash 669612110, now seen corresponding path program 4 times [2024-09-25 10:53:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:26,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175914742] [2024-09-25 10:53:26,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:26,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1838048227] [2024-09-25 10:53:26,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:53:26,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:26,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:26,031 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) [2024-09-25 10:53:26,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-25 10:53:26,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:53:26,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:26,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-25 10:53:26,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:27,079 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 71 proven. 36 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2024-09-25 10:53:27,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:27,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175914742] [2024-09-25 10:53:27,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:27,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838048227] [2024-09-25 10:53:27,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838048227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:27,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:27,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2024-09-25 10:53:27,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176680640] [2024-09-25 10:53:27,374 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:27,375 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 10:53:27,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:27,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 10:53:27,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2024-09-25 10:53:27,375 INFO L87 Difference]: Start difference. First operand 228 states and 317 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-25 10:53:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:28,239 INFO L93 Difference]: Finished difference Result 261 states and 362 transitions. [2024-09-25 10:53:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:53:28,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) Word has length 128 [2024-09-25 10:53:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:28,241 INFO L225 Difference]: With dead ends: 261 [2024-09-25 10:53:28,241 INFO L226 Difference]: Without dead ends: 259 [2024-09-25 10:53:28,241 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2024-09-25 10:53:28,242 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 24 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:28,242 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 528 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-25 10:53:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-25 10:53:28,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 235. [2024-09-25 10:53:28,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 123 states have (on average 1.1544715447154472) internal successors, (142), 126 states have internal predecessors, (142), 94 states have call successors, (94), 18 states have call predecessors, (94), 17 states have return successors, (91), 90 states have call predecessors, (91), 91 states have call successors, (91) [2024-09-25 10:53:28,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 327 transitions. [2024-09-25 10:53:28,368 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 327 transitions. Word has length 128 [2024-09-25 10:53:28,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:28,368 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 327 transitions. [2024-09-25 10:53:28,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 7 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 6 states have call successors, (22) [2024-09-25 10:53:28,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:28,368 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 327 transitions. [2024-09-25 10:53:28,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2024-09-25 10:53:28,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:28,370 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:28,388 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-25 10:53:28,571 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 [2024-09-25 10:53:28,571 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:28,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:28,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1717758444, now seen corresponding path program 5 times [2024-09-25 10:53:28,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:28,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370981865] [2024-09-25 10:53:28,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:28,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:28,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:28,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964003718] [2024-09-25 10:53:28,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:53:28,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:28,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:28,598 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) [2024-09-25 10:53:28,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-25 10:53:28,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-25 10:53:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:28,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-25 10:53:28,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 99 proven. 79 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2024-09-25 10:53:30,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:30,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370981865] [2024-09-25 10:53:30,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964003718] [2024-09-25 10:53:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964003718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:30,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:30,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-25 10:53:30,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532323033] [2024-09-25 10:53:30,894 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:30,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:53:30,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:30,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:53:30,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:53:30,896 INFO L87 Difference]: Start difference. First operand 235 states and 327 transitions. Second operand has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-25 10:53:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:32,743 INFO L93 Difference]: Finished difference Result 269 states and 372 transitions. [2024-09-25 10:53:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:53:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) Word has length 131 [2024-09-25 10:53:32,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:32,746 INFO L225 Difference]: With dead ends: 269 [2024-09-25 10:53:32,746 INFO L226 Difference]: Without dead ends: 267 [2024-09-25 10:53:32,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:53:32,747 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 23 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:32,747 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 637 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-25 10:53:32,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-25 10:53:32,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 265. [2024-09-25 10:53:32,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 138 states have (on average 1.1521739130434783) internal successors, (159), 141 states have internal predecessors, (159), 106 states have call successors, (106), 21 states have call predecessors, (106), 20 states have return successors, (103), 102 states have call predecessors, (103), 103 states have call successors, (103) [2024-09-25 10:53:32,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 368 transitions. [2024-09-25 10:53:32,894 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 368 transitions. Word has length 131 [2024-09-25 10:53:32,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:32,894 INFO L474 AbstractCegarLoop]: Abstraction has 265 states and 368 transitions. [2024-09-25 10:53:32,895 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 9 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-25 10:53:32,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:32,895 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 368 transitions. [2024-09-25 10:53:32,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2024-09-25 10:53:32,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:32,897 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:32,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-25 10:53:33,097 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 [2024-09-25 10:53:33,097 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:33,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:33,098 INFO L85 PathProgramCache]: Analyzing trace with hash -83573063, now seen corresponding path program 2 times [2024-09-25 10:53:33,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:33,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136631294] [2024-09-25 10:53:33,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:33,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:33,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157263403] [2024-09-25 10:53:33,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:53:33,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:33,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:33,120 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) [2024-09-25 10:53:33,122 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-25 10:53:33,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:53:33,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:33,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-25 10:53:33,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 73 proven. 47 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-25 10:53:34,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:53:36,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:53:36,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136631294] [2024-09-25 10:53:36,325 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:53:36,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157263403] [2024-09-25 10:53:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157263403] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:53:36,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:53:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2024-09-25 10:53:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249442123] [2024-09-25 10:53:36,326 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:53:36,326 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-25 10:53:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:53:36,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-25 10:53:36,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:53:36,327 INFO L87 Difference]: Start difference. First operand 265 states and 368 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-25 10:53:37,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:53:37,358 INFO L93 Difference]: Finished difference Result 309 states and 429 transitions. [2024-09-25 10:53:37,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:53:37,358 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) Word has length 137 [2024-09-25 10:53:37,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:53:37,360 INFO L225 Difference]: With dead ends: 309 [2024-09-25 10:53:37,361 INFO L226 Difference]: Without dead ends: 302 [2024-09-25 10:53:37,361 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2024-09-25 10:53:37,361 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 29 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 10:53:37,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 644 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 10:53:37,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2024-09-25 10:53:37,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 282. [2024-09-25 10:53:37,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 149 states have (on average 1.1476510067114094) internal successors, (171), 152 states have internal predecessors, (171), 110 states have call successors, (110), 23 states have call predecessors, (110), 22 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2024-09-25 10:53:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 388 transitions. [2024-09-25 10:53:37,531 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 388 transitions. Word has length 137 [2024-09-25 10:53:37,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:53:37,531 INFO L474 AbstractCegarLoop]: Abstraction has 282 states and 388 transitions. [2024-09-25 10:53:37,531 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 7 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-25 10:53:37,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:37,532 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 388 transitions. [2024-09-25 10:53:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-25 10:53:37,533 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:53:37,534 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:53:37,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-25 10:53:37,737 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 [2024-09-25 10:53:37,738 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:53:37,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:53:37,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1268175597, now seen corresponding path program 6 times [2024-09-25 10:53:37,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:53:37,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034226593] [2024-09-25 10:53:37,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:53:37,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:53:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:53:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173063179] [2024-09-25 10:53:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-25 10:53:37,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:53:37,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:53:37,772 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) [2024-09-25 10:53:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-25 10:53:37,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-25 10:53:37,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:53:37,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-25 10:53:37,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:53:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 162 proven. 42 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2024-09-25 10:53:38,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:13,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:13,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034226593] [2024-09-25 10:54:13,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:13,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173063179] [2024-09-25 10:54:13,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173063179] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:13,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:13,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 10:54:13,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428741394] [2024-09-25 10:54:13,400 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:13,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:54:13,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:13,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:54:13,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=481, Unknown=2, NotChecked=0, Total=600 [2024-09-25 10:54:13,401 INFO L87 Difference]: Start difference. First operand 282 states and 388 transitions. Second operand has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-25 10:54:14,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:14,057 INFO L93 Difference]: Finished difference Result 294 states and 398 transitions. [2024-09-25 10:54:14,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:54:14,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 150 [2024-09-25 10:54:14,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:14,060 INFO L225 Difference]: With dead ends: 294 [2024-09-25 10:54:14,060 INFO L226 Difference]: Without dead ends: 292 [2024-09-25 10:54:14,060 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=139, Invalid=561, Unknown=2, NotChecked=0, Total=702 [2024-09-25 10:54:14,061 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 20 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:14,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 375 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:54:14,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2024-09-25 10:54:14,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 261. [2024-09-25 10:54:14,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 140 states have (on average 1.1428571428571428) internal successors, (160), 143 states have internal predecessors, (160), 98 states have call successors, (98), 23 states have call predecessors, (98), 22 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-09-25 10:54:14,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 353 transitions. [2024-09-25 10:54:14,237 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 353 transitions. Word has length 150 [2024-09-25 10:54:14,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:14,239 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 353 transitions. [2024-09-25 10:54:14,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2024-09-25 10:54:14,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:14,239 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 353 transitions. [2024-09-25 10:54:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-25 10:54:14,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:14,241 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:14,249 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-25 10:54:14,441 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 [2024-09-25 10:54:14,442 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:14,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 680663563, now seen corresponding path program 7 times [2024-09-25 10:54:14,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509768330] [2024-09-25 10:54:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:14,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:14,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975716679] [2024-09-25 10:54:14,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-25 10:54:14,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:14,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:14,465 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) [2024-09-25 10:54:14,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-25 10:54:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:54:14,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-25 10:54:14,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 173 proven. 87 refuted. 0 times theorem prover too weak. 585 trivial. 0 not checked. [2024-09-25 10:54:15,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:16,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:16,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509768330] [2024-09-25 10:54:16,456 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:16,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975716679] [2024-09-25 10:54:16,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975716679] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:16,456 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:16,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2024-09-25 10:54:16,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744411553] [2024-09-25 10:54:16,456 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:16,456 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 10:54:16,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:16,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 10:54:16,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2024-09-25 10:54:16,457 INFO L87 Difference]: Start difference. First operand 261 states and 353 transitions. Second operand has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-25 10:54:17,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:17,867 INFO L93 Difference]: Finished difference Result 299 states and 401 transitions. [2024-09-25 10:54:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-25 10:54:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) Word has length 153 [2024-09-25 10:54:17,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:17,869 INFO L225 Difference]: With dead ends: 299 [2024-09-25 10:54:17,869 INFO L226 Difference]: Without dead ends: 297 [2024-09-25 10:54:17,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2024-09-25 10:54:17,870 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 42 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:17,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 582 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-25 10:54:17,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2024-09-25 10:54:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 266. [2024-09-25 10:54:17,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 143 states have (on average 1.1398601398601398) internal successors, (163), 146 states have internal predecessors, (163), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (95), 94 states have call predecessors, (95), 95 states have call successors, (95) [2024-09-25 10:54:17,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 356 transitions. [2024-09-25 10:54:17,999 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 356 transitions. Word has length 153 [2024-09-25 10:54:17,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:17,999 INFO L474 AbstractCegarLoop]: Abstraction has 266 states and 356 transitions. [2024-09-25 10:54:17,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26) [2024-09-25 10:54:18,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 356 transitions. [2024-09-25 10:54:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-25 10:54:18,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:18,001 INFO L216 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:18,017 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:18,205 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 [2024-09-25 10:54:18,206 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:18,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:18,206 INFO L85 PathProgramCache]: Analyzing trace with hash 818386669, now seen corresponding path program 8 times [2024-09-25 10:54:18,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:18,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361717429] [2024-09-25 10:54:18,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:18,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:18,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:18,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [864931251] [2024-09-25 10:54:18,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:54:18,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:18,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:18,227 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) [2024-09-25 10:54:18,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-25 10:54:18,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:54:18,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:54:18,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-25 10:54:18,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 167 proven. 78 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2024-09-25 10:54:20,763 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:21,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361717429] [2024-09-25 10:54:21,629 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:21,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864931251] [2024-09-25 10:54:21,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864931251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:21,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:21,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 10:54:21,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873379649] [2024-09-25 10:54:21,630 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:21,630 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:54:21,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:21,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:54:21,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-25 10:54:21,631 INFO L87 Difference]: Start difference. First operand 266 states and 356 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-25 10:54:25,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.60s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-25 10:54:29,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:29,436 INFO L93 Difference]: Finished difference Result 318 states and 430 transitions. [2024-09-25 10:54:29,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-25 10:54:29,437 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 153 [2024-09-25 10:54:29,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:29,439 INFO L225 Difference]: With dead ends: 318 [2024-09-25 10:54:29,439 INFO L226 Difference]: Without dead ends: 316 [2024-09-25 10:54:29,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 137 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2024-09-25 10:54:29,440 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 719 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:29,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 719 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 690 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2024-09-25 10:54:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2024-09-25 10:54:29,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2024-09-25 10:54:29,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 166 states have internal predecessors, (187), 115 states have call successors, (115), 28 states have call predecessors, (115), 27 states have return successors, (112), 112 states have call predecessors, (112), 112 states have call successors, (112) [2024-09-25 10:54:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 414 transitions. [2024-09-25 10:54:29,611 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 414 transitions. Word has length 153 [2024-09-25 10:54:29,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:29,611 INFO L474 AbstractCegarLoop]: Abstraction has 307 states and 414 transitions. [2024-09-25 10:54:29,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-25 10:54:29,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,612 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 414 transitions. [2024-09-25 10:54:29,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2024-09-25 10:54:29,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:29,614 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:29,629 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-25 10:54:29,814 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 [2024-09-25 10:54:29,814 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:29,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:29,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1362351366, now seen corresponding path program 3 times [2024-09-25 10:54:29,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:29,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479126162] [2024-09-25 10:54:29,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:29,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:29,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:29,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075996761] [2024-09-25 10:54:29,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:54:29,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:29,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:29,839 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) [2024-09-25 10:54:29,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-25 10:54:29,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 10:54:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:54:29,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-25 10:54:29,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:30,657 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 95 proven. 43 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2024-09-25 10:54:30,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:35,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:35,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479126162] [2024-09-25 10:54:35,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:35,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075996761] [2024-09-25 10:54:35,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075996761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:35,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:35,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2024-09-25 10:54:35,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123146598] [2024-09-25 10:54:35,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:35,216 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-25 10:54:35,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:35,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-25 10:54:35,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=389, Unknown=1, NotChecked=0, Total=462 [2024-09-25 10:54:35,217 INFO L87 Difference]: Start difference. First operand 307 states and 414 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-25 10:54:35,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:35,764 INFO L93 Difference]: Finished difference Result 324 states and 428 transitions. [2024-09-25 10:54:35,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 10:54:35,765 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 156 [2024-09-25 10:54:35,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:35,767 INFO L225 Difference]: With dead ends: 324 [2024-09-25 10:54:35,767 INFO L226 Difference]: Without dead ends: 317 [2024-09-25 10:54:35,769 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=103, Invalid=496, Unknown=1, NotChecked=0, Total=600 [2024-09-25 10:54:35,769 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 22 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:35,770 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 260 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 10:54:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2024-09-25 10:54:35,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 300. [2024-09-25 10:54:35,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 163 states have (on average 1.1226993865030674) internal successors, (183), 165 states have internal predecessors, (183), 107 states have call successors, (107), 30 states have call predecessors, (107), 29 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2024-09-25 10:54:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 394 transitions. [2024-09-25 10:54:35,973 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 394 transitions. Word has length 156 [2024-09-25 10:54:35,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:35,975 INFO L474 AbstractCegarLoop]: Abstraction has 300 states and 394 transitions. [2024-09-25 10:54:35,976 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-25 10:54:35,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:35,976 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 394 transitions. [2024-09-25 10:54:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-25 10:54:35,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:35,978 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:35,996 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-25 10:54:36,182 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 [2024-09-25 10:54:36,183 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:36,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:36,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1326373992, now seen corresponding path program 4 times [2024-09-25 10:54:36,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:36,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761399255] [2024-09-25 10:54:36,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:36,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1631669869] [2024-09-25 10:54:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:54:36,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:36,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:36,213 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) [2024-09-25 10:54:36,215 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-25 10:54:36,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:54:36,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:54:36,306 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-25 10:54:36,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 99 proven. 80 refuted. 0 times theorem prover too weak. 748 trivial. 0 not checked. [2024-09-25 10:54:38,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:42,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761399255] [2024-09-25 10:54:42,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:42,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631669869] [2024-09-25 10:54:42,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631669869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:42,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:42,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2024-09-25 10:54:42,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115028883] [2024-09-25 10:54:42,747 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:42,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 10:54:42,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:42,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 10:54:42,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2024-09-25 10:54:42,748 INFO L87 Difference]: Start difference. First operand 300 states and 394 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-25 10:54:45,651 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-25 10:54:47,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:54:47,267 INFO L93 Difference]: Finished difference Result 337 states and 450 transitions. [2024-09-25 10:54:47,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 10:54:47,268 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) Word has length 159 [2024-09-25 10:54:47,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:54:47,270 INFO L225 Difference]: With dead ends: 337 [2024-09-25 10:54:47,270 INFO L226 Difference]: Without dead ends: 330 [2024-09-25 10:54:47,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:54:47,271 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 46 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2024-09-25 10:54:47,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 482 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2024-09-25 10:54:47,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2024-09-25 10:54:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 309. [2024-09-25 10:54:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 168 states have (on average 1.125) internal successors, (189), 170 states have internal predecessors, (189), 111 states have call successors, (111), 30 states have call predecessors, (111), 29 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2024-09-25 10:54:47,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 408 transitions. [2024-09-25 10:54:47,454 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 408 transitions. Word has length 159 [2024-09-25 10:54:47,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:54:47,454 INFO L474 AbstractCegarLoop]: Abstraction has 309 states and 408 transitions. [2024-09-25 10:54:47,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 10 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (27), 9 states have call predecessors, (27), 9 states have call successors, (27) [2024-09-25 10:54:47,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:47,455 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 408 transitions. [2024-09-25 10:54:47,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2024-09-25 10:54:47,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:54:47,456 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:54:47,468 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-25 10:54:47,656 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 [2024-09-25 10:54:47,656 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:54:47,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:54:47,657 INFO L85 PathProgramCache]: Analyzing trace with hash 895086330, now seen corresponding path program 5 times [2024-09-25 10:54:47,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:54:47,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811018360] [2024-09-25 10:54:47,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:54:47,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:54:47,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:54:47,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [959868068] [2024-09-25 10:54:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:54:47,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:54:47,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:54:47,683 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) [2024-09-25 10:54:47,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-25 10:54:47,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-25 10:54:47,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:54:47,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-25 10:54:47,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:54:51,427 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 81 proven. 83 refuted. 0 times theorem prover too weak. 763 trivial. 0 not checked. [2024-09-25 10:54:51,427 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:54:55,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:54:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811018360] [2024-09-25 10:54:55,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:54:55,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959868068] [2024-09-25 10:54:55,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [959868068] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:54:55,681 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:54:55,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2024-09-25 10:54:55,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463943950] [2024-09-25 10:54:55,682 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:54:55,682 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 10:54:55,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:54:55,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 10:54:55,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=524, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:54:55,683 INFO L87 Difference]: Start difference. First operand 309 states and 408 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 10:55:00,672 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-25 10:55:02,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:02,056 INFO L93 Difference]: Finished difference Result 365 states and 486 transitions. [2024-09-25 10:55:02,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 10:55:02,057 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) Word has length 159 [2024-09-25 10:55:02,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:02,058 INFO L225 Difference]: With dead ends: 365 [2024-09-25 10:55:02,058 INFO L226 Difference]: Without dead ends: 363 [2024-09-25 10:55:02,059 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2024-09-25 10:55:02,059 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 34 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:02,060 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 724 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2024-09-25 10:55:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-09-25 10:55:02,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 341. [2024-09-25 10:55:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 187 states have (on average 1.1283422459893049) internal successors, (211), 190 states have internal predecessors, (211), 120 states have call successors, (120), 34 states have call predecessors, (120), 33 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-09-25 10:55:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 448 transitions. [2024-09-25 10:55:02,274 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 448 transitions. Word has length 159 [2024-09-25 10:55:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:02,274 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 448 transitions. [2024-09-25 10:55:02,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 9 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (27), 8 states have call predecessors, (27), 8 states have call successors, (27) [2024-09-25 10:55:02,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 448 transitions. [2024-09-25 10:55:02,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2024-09-25 10:55:02,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:02,276 INFO L216 NwaCegarLoop]: trace histogram [22, 21, 21, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:55:02,289 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-25 10:55:02,476 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 [2024-09-25 10:55:02,477 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:02,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:02,477 INFO L85 PathProgramCache]: Analyzing trace with hash 487350504, now seen corresponding path program 2 times [2024-09-25 10:55:02,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:02,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118514989] [2024-09-25 10:55:02,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:02,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:02,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155766568] [2024-09-25 10:55:02,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 10:55:02,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:02,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:02,505 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) [2024-09-25 10:55:02,506 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-25 10:55:02,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 10:55:02,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:02,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 61 conjuncts are in the unsatisfiable core [2024-09-25 10:55:02,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:03,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 104 proven. 80 refuted. 0 times theorem prover too weak. 825 trivial. 0 not checked. [2024-09-25 10:55:03,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:03,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 108 proven. 7 refuted. 0 times theorem prover too weak. 894 trivial. 0 not checked. [2024-09-25 10:55:03,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118514989] [2024-09-25 10:55:03,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:03,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155766568] [2024-09-25 10:55:03,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155766568] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:55:03,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 10:55:03,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 25 [2024-09-25 10:55:03,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089340106] [2024-09-25 10:55:03,497 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:03,497 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-25 10:55:03,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:03,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-25 10:55:03,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-25 10:55:03,499 INFO L87 Difference]: Start difference. First operand 341 states and 448 transitions. Second operand has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-25 10:55:05,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:05,975 INFO L93 Difference]: Finished difference Result 386 states and 506 transitions. [2024-09-25 10:55:05,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-25 10:55:05,975 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) Word has length 164 [2024-09-25 10:55:05,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:05,977 INFO L225 Difference]: With dead ends: 386 [2024-09-25 10:55:05,977 INFO L226 Difference]: Without dead ends: 373 [2024-09-25 10:55:05,978 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=227, Invalid=1105, Unknown=0, NotChecked=0, Total=1332 [2024-09-25 10:55:05,978 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 66 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:05,979 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 576 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-25 10:55:05,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2024-09-25 10:55:06,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 352. [2024-09-25 10:55:06,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 197 states have (on average 1.1218274111675126) internal successors, (221), 199 states have internal predecessors, (221), 119 states have call successors, (119), 36 states have call predecessors, (119), 35 states have return successors, (117), 116 states have call predecessors, (117), 117 states have call successors, (117) [2024-09-25 10:55:06,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 457 transitions. [2024-09-25 10:55:06,275 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 457 transitions. Word has length 164 [2024-09-25 10:55:06,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:06,275 INFO L474 AbstractCegarLoop]: Abstraction has 352 states and 457 transitions. [2024-09-25 10:55:06,275 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 10 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 11 states have call predecessors, (38), 10 states have call successors, (38) [2024-09-25 10:55:06,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 457 transitions. [2024-09-25 10:55:06,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-25 10:55:06,277 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:06,277 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:55:06,295 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-25 10:55:06,478 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 [2024-09-25 10:55:06,478 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:06,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:06,479 INFO L85 PathProgramCache]: Analyzing trace with hash -700524310, now seen corresponding path program 9 times [2024-09-25 10:55:06,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:06,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420506343] [2024-09-25 10:55:06,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:06,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:06,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267278684] [2024-09-25 10:55:06,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 10:55:06,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:06,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:06,507 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:55:06,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-25 10:55:06,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-25 10:55:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:06,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-25 10:55:06,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:07,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 185 proven. 61 refuted. 0 times theorem prover too weak. 964 trivial. 0 not checked. [2024-09-25 10:55:07,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:07,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:07,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420506343] [2024-09-25 10:55:07,932 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:07,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267278684] [2024-09-25 10:55:07,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267278684] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:55:07,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:55:07,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-25 10:55:07,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165430830] [2024-09-25 10:55:07,933 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:07,933 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-25 10:55:07,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:07,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-25 10:55:07,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:55:07,934 INFO L87 Difference]: Start difference. First operand 352 states and 457 transitions. Second operand has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-25 10:55:08,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:08,826 INFO L93 Difference]: Finished difference Result 368 states and 470 transitions. [2024-09-25 10:55:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 10:55:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 175 [2024-09-25 10:55:08,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:08,829 INFO L225 Difference]: With dead ends: 368 [2024-09-25 10:55:08,829 INFO L226 Difference]: Without dead ends: 366 [2024-09-25 10:55:08,829 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:55:08,830 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 17 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:08,831 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 637 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-25 10:55:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2024-09-25 10:55:09,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 335. [2024-09-25 10:55:09,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 191 states have (on average 1.1151832460732984) internal successors, (213), 193 states have internal predecessors, (213), 107 states have call successors, (107), 37 states have call predecessors, (107), 36 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2024-09-25 10:55:09,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 425 transitions. [2024-09-25 10:55:09,036 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 425 transitions. Word has length 175 [2024-09-25 10:55:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:09,037 INFO L474 AbstractCegarLoop]: Abstraction has 335 states and 425 transitions. [2024-09-25 10:55:09,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2024-09-25 10:55:09,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:09,037 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 425 transitions. [2024-09-25 10:55:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-25 10:55:09,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:09,040 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:55:09,053 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-25 10:55:09,240 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-25 10:55:09,240 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:09,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:09,241 INFO L85 PathProgramCache]: Analyzing trace with hash 515416140, now seen corresponding path program 10 times [2024-09-25 10:55:09,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:09,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445554667] [2024-09-25 10:55:09,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:09,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:09,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060515514] [2024-09-25 10:55:09,274 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 10:55:09,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:09,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:09,276 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:55:09,278 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-25 10:55:09,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 10:55:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:09,381 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-25 10:55:09,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:16,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 228 proven. 153 refuted. 0 times theorem prover too weak. 829 trivial. 0 not checked. [2024-09-25 10:55:16,752 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:55:17,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:55:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445554667] [2024-09-25 10:55:17,429 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:55:17,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060515514] [2024-09-25 10:55:17,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060515514] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:55:17,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:55:17,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2024-09-25 10:55:17,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044828939] [2024-09-25 10:55:17,430 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-25 10:55:17,430 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-25 10:55:17,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:55:17,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-25 10:55:17,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-25 10:55:17,431 INFO L87 Difference]: Start difference. First operand 335 states and 425 transitions. Second operand has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-25 10:55:29,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-25 10:55:34,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2024-09-25 10:55:38,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:55:38,216 INFO L93 Difference]: Finished difference Result 365 states and 467 transitions. [2024-09-25 10:55:38,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-25 10:55:38,217 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) Word has length 175 [2024-09-25 10:55:38,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:55:38,219 INFO L225 Difference]: With dead ends: 365 [2024-09-25 10:55:38,219 INFO L226 Difference]: Without dead ends: 363 [2024-09-25 10:55:38,219 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 10:55:38,220 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 42 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2024-09-25 10:55:38,220 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 705 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1166 Invalid, 1 Unknown, 0 Unchecked, 15.7s Time] [2024-09-25 10:55:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2024-09-25 10:55:38,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 332. [2024-09-25 10:55:38,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 188 states have (on average 1.1170212765957446) internal successors, (210), 190 states have internal predecessors, (210), 107 states have call successors, (107), 37 states have call predecessors, (107), 36 states have return successors, (105), 104 states have call predecessors, (105), 105 states have call successors, (105) [2024-09-25 10:55:38,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 422 transitions. [2024-09-25 10:55:38,478 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 422 transitions. Word has length 175 [2024-09-25 10:55:38,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:55:38,478 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 422 transitions. [2024-09-25 10:55:38,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 18 states have internal predecessors, (38), 11 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 13 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-25 10:55:38,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 422 transitions. [2024-09-25 10:55:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2024-09-25 10:55:38,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:55:38,481 INFO L216 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:55:38,500 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-25 10:55:38,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:38,681 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:55:38,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:55:38,682 INFO L85 PathProgramCache]: Analyzing trace with hash 653139246, now seen corresponding path program 11 times [2024-09-25 10:55:38,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:55:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808543436] [2024-09-25 10:55:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:55:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:55:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:55:38,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1566958207] [2024-09-25 10:55:38,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 10:55:38,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:55:38,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:55:38,720 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:55:38,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-25 10:55:38,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-25 10:55:38,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 10:55:38,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-25 10:55:38,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:55:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 199 proven. 134 refuted. 0 times theorem prover too weak. 877 trivial. 0 not checked. [2024-09-25 10:55:40,631 INFO L327 TraceCheckSpWp]: Computing backward predicates...