./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.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/hard-ll_valuebound50.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 a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f --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 11:07:49,548 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 11:07:49,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 11:07:49,611 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 11:07:49,612 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 11:07:49,635 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 11:07:49,638 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 11:07:49,639 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 11:07:49,639 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 11:07:49,640 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 11:07:49,640 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 11:07:49,640 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 11:07:49,641 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 11:07:49,644 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 11:07:49,644 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 11:07:49,644 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 11:07:49,644 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 11:07:49,645 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 11:07:49,645 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 11:07:49,645 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 11:07:49,645 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 11:07:49,649 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 11:07:49,649 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 11:07:49,649 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 11:07:49,649 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 11:07:49,649 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 11:07:49,650 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 11:07:49,650 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:07:49,651 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 11:07:49,651 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 11:07:49,652 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 11:07:49,653 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 11:07:49,653 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 -> a3c408aeb75b378569a9828f29f37caa03495bee0afeec4c4af831c79f34806f 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 11:07:49,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 11:07:49,936 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 11:07:49,938 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 11:07:49,938 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 11:07:49,941 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 11:07:49,942 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2024-09-25 11:07:51,232 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 11:07:51,374 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 11:07:51,374 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c [2024-09-25 11:07:51,380 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6c1004e50/8a04c64efbf84c15abcc7a9a3587d770/FLAGc71863521 [2024-09-25 11:07:51,790 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6c1004e50/8a04c64efbf84c15abcc7a9a3587d770 [2024-09-25 11:07:51,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 11:07:51,793 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 11:07:51,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 11:07:51,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 11:07:51,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 11:07:51,801 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:07:51" (1/1) ... [2024-09-25 11:07:51,802 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@502a0b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:51, skipping insertion in model container [2024-09-25 11:07:51,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 11:07:51" (1/1) ... [2024-09-25 11:07:51,818 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 11:07:51,941 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2024-09-25 11:07:51,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:07:51,966 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 11:07:51,978 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound50.c[538,551] [2024-09-25 11:07:51,986 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 11:07:52,001 INFO L204 MainTranslator]: Completed translation [2024-09-25 11:07:52,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52 WrapperNode [2024-09-25 11:07:52,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 11:07:52,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 11:07:52,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 11:07:52,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 11:07:52,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,016 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,024 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 11:07:52,024 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 11:07:52,025 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 11:07:52,026 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 11:07:52,026 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 11:07:52,034 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,036 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,048 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 11:07:52,049 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,049 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,051 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,080 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,083 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,087 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,088 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 11:07:52,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 11:07:52,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 11:07:52,089 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 11:07:52,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (1/1) ... [2024-09-25 11:07:52,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 11:07:52,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:52,125 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 11:07:52,131 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 11:07:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 11:07:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 11:07:52,163 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 11:07:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 11:07:52,163 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 11:07:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 11:07:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 11:07:52,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 11:07:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 11:07:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 11:07:52,165 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 11:07:52,165 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 11:07:52,213 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 11:07:52,215 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 11:07:52,356 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-25 11:07:52,356 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 11:07:52,376 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 11:07:52,376 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 11:07:52,377 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:07:52 BoogieIcfgContainer [2024-09-25 11:07:52,377 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 11:07:52,378 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 11:07:52,378 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 11:07:52,381 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 11:07:52,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 11:07:51" (1/3) ... [2024-09-25 11:07:52,381 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad03299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:07:52, skipping insertion in model container [2024-09-25 11:07:52,381 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 11:07:52" (2/3) ... [2024-09-25 11:07:52,382 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ad03299 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 11:07:52, skipping insertion in model container [2024-09-25 11:07:52,382 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 11:07:52" (3/3) ... [2024-09-25 11:07:52,383 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound50.c [2024-09-25 11:07:52,394 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 11:07:52,394 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 11:07:52,430 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 11:07:52,435 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;@358c1fc9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 11:07:52,435 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 11:07:52,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-25 11:07:52,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:07:52,443 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:52,444 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:52,445 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:52,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-25 11:07:52,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:52,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180909253] [2024-09-25 11:07:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:52,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:07:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:07:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:07:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:07:52,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:07:52,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:52,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180909253] [2024-09-25 11:07:52,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180909253] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:07:52,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:07:52,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-25 11:07:52,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28271909] [2024-09-25 11:07:52,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:52,609 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-25 11:07:52,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:52,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-25 11:07:52,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:07:52,640 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-25 11:07:52,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:52,661 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-25 11:07:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-25 11:07:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-25 11:07:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:52,667 INFO L225 Difference]: With dead ends: 66 [2024-09-25 11:07:52,668 INFO L226 Difference]: Without dead ends: 32 [2024-09-25 11:07:52,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-25 11:07:52,672 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:52,673 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:52,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-25 11:07:52,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-25 11:07:52,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 11:07:52,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-25 11:07:52,699 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-25 11:07:52,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:52,700 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-25 11:07:52,700 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-25 11:07:52,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-25 11:07:52,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-25 11:07:52,702 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:52,702 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:52,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 11:07:52,702 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:52,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:52,703 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-25 11:07:52,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:52,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414212360] [2024-09-25 11:07:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:52,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:52,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:07:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:07:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:07:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:07:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:07:52,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:52,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414212360] [2024-09-25 11:07:52,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414212360] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:07:52,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:07:52,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:07:52,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968602792] [2024-09-25 11:07:52,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:52,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:07:52,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:52,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:07:52,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:07:52,948 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-25 11:07:53,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:53,016 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-25 11:07:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:07:53,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-25 11:07:53,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:53,019 INFO L225 Difference]: With dead ends: 45 [2024-09-25 11:07:53,019 INFO L226 Difference]: Without dead ends: 43 [2024-09-25 11:07:53,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:07:53,020 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:53,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:53,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-25 11:07:53,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-25 11:07:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 11:07:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-25 11:07:53,037 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-25 11:07:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:53,037 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-25 11:07:53,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-25 11:07:53,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-25 11:07:53,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-25 11:07:53,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:53,039 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:53,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 11:07:53,040 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:53,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-25 11:07:53,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:53,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336465472] [2024-09-25 11:07:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:07:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:07:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:07:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:07:53,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:07:53,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-25 11:07:53,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:53,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336465472] [2024-09-25 11:07:53,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336465472] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:07:53,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:07:53,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:07:53,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910100155] [2024-09-25 11:07:53,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:53,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:07:53,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:53,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:07:53,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:07:53,187 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:07:53,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:53,249 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-25 11:07:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:07:53,250 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-25 11:07:53,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:53,251 INFO L225 Difference]: With dead ends: 49 [2024-09-25 11:07:53,251 INFO L226 Difference]: Without dead ends: 47 [2024-09-25 11:07:53,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:07:53,252 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:53,253 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:53,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-25 11:07:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-25 11:07:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 11:07:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-25 11:07:53,260 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-25 11:07:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:53,260 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-25 11:07:53,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-25 11:07:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,261 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-25 11:07:53,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-25 11:07:53,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:53,263 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:53,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-25 11:07:53,263 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:53,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-25 11:07:53,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315109072] [2024-09-25 11:07:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:53,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:07:53,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28042452] [2024-09-25 11:07:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:53,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:53,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:53,293 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 11:07:53,298 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 11:07:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,341 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 11:07:53,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 11:07:53,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:07:53,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:53,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315109072] [2024-09-25 11:07:53,399 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:07:53,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28042452] [2024-09-25 11:07:53,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28042452] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:07:53,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:07:53,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:07:53,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647930682] [2024-09-25 11:07:53,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:53,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:07:53,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:53,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:07:53,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:07:53,400 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 11:07:53,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:53,469 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-25 11:07:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:07:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-25 11:07:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:53,473 INFO L225 Difference]: With dead ends: 66 [2024-09-25 11:07:53,474 INFO L226 Difference]: Without dead ends: 53 [2024-09-25 11:07:53,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:07:53,475 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:53,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:53,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-25 11:07:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-25 11:07:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-25 11:07:53,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-25 11:07:53,484 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-25 11:07:53,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:53,484 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-25 11:07:53,484 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-25 11:07:53,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,484 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-25 11:07:53,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-25 11:07:53,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:53,485 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:53,514 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-25 11:07:53,686 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:53,687 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:53,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-25 11:07:53,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:53,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434214476] [2024-09-25 11:07:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:53,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:07:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242192589] [2024-09-25 11:07:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:53,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:53,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:53,716 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 11:07:53,721 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 11:07:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:53,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-25 11:07:53,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:07:53,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:07:54,017 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-25 11:07:54,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434214476] [2024-09-25 11:07:54,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:07:54,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242192589] [2024-09-25 11:07:54,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242192589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:07:54,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:07:54,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-25 11:07:54,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548058656] [2024-09-25 11:07:54,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:07:54,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-25 11:07:54,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:54,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-25 11:07:54,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-25 11:07:54,020 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 11:07:54,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:54,103 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-25 11:07:54,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-25 11:07:54,104 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-25 11:07:54,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:54,106 INFO L225 Difference]: With dead ends: 68 [2024-09-25 11:07:54,106 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 11:07:54,106 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-25 11:07:54,107 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:54,107 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:07:54,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 11:07:54,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-25 11:07:54,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 11:07:54,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-25 11:07:54,116 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-25 11:07:54,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:54,117 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-25 11:07:54,117 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-25 11:07:54,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:54,117 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-25 11:07:54,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 11:07:54,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:54,118 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:54,133 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 11:07:54,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:54,319 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:54,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:54,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-25 11:07:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346366663] [2024-09-25 11:07:54,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:54,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:07:54,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449632517] [2024-09-25 11:07:54,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:54,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:54,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:54,338 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 11:07:54,339 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 11:07:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 11:07:54,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-25 11:07:54,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:07:54,534 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-25 11:07:54,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:54,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346366663] [2024-09-25 11:07:54,535 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:07:54,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449632517] [2024-09-25 11:07:54,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449632517] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 11:07:54,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:07:54,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-25 11:07:54,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266015621] [2024-09-25 11:07:54,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:54,538 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:07:54,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:54,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:07:54,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:07:54,539 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 11:07:54,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:54,612 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-25 11:07:54,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:07:54,612 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-25 11:07:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:54,614 INFO L225 Difference]: With dead ends: 73 [2024-09-25 11:07:54,617 INFO L226 Difference]: Without dead ends: 71 [2024-09-25 11:07:54,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-25 11:07:54,618 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:54,618 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:54,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-25 11:07:54,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-25 11:07:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-25 11:07:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-25 11:07:54,639 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-25 11:07:54,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:54,640 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-25 11:07:54,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-25 11:07:54,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-25 11:07:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-25 11:07:54,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:54,642 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:54,661 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 11:07:54,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-25 11:07:54,847 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:54,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:54,847 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-25 11:07:54,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:54,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488382626] [2024-09-25 11:07:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:54,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:07:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:07:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:07:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:07:54,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:07:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:07:54,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:07:54,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:07:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:07:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-25 11:07:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:54,963 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-25 11:07:54,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:54,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488382626] [2024-09-25 11:07:54,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488382626] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:07:54,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 11:07:54,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 11:07:54,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511186232] [2024-09-25 11:07:54,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:07:54,964 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:07:54,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:07:54,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:07:54,965 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-25 11:07:55,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:55,033 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-25 11:07:55,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:07:55,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-25 11:07:55,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:55,034 INFO L225 Difference]: With dead ends: 78 [2024-09-25 11:07:55,035 INFO L226 Difference]: Without dead ends: 66 [2024-09-25 11:07:55,035 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:07:55,036 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:55,037 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:07:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-25 11:07:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-25 11:07:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-25 11:07:55,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-25 11:07:55,055 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-25 11:07:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:55,055 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-25 11:07:55,056 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-25 11:07:55,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-25 11:07:55,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-25 11:07:55,058 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:55,058 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:55,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-25 11:07:55,058 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:55,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:55,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-25 11:07:55,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:55,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402311125] [2024-09-25 11:07:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:55,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:07:55,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999956570] [2024-09-25 11:07:55,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:55,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:55,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:55,079 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 11:07:55,080 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 11:07:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:55,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-25 11:07:55,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:55,578 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-25 11:07:55,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:07:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-25 11:07:56,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402311125] [2024-09-25 11:07:56,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:07:56,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999956570] [2024-09-25 11:07:56,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999956570] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:07:56,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:07:56,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2024-09-25 11:07:56,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948215970] [2024-09-25 11:07:56,792 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:07:56,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-25 11:07:56,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:56,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-25 11:07:56,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2024-09-25 11:07:56,793 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-25 11:07:57,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:57,825 INFO L93 Difference]: Finished difference Result 153 states and 210 transitions. [2024-09-25 11:07:57,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 11:07:57,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) Word has length 74 [2024-09-25 11:07:57,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:57,827 INFO L225 Difference]: With dead ends: 153 [2024-09-25 11:07:57,828 INFO L226 Difference]: Without dead ends: 130 [2024-09-25 11:07:57,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=154, Invalid=602, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:07:57,829 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 79 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:57,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 256 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-25 11:07:57,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-25 11:07:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 105. [2024-09-25 11:07:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-25 11:07:57,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-25 11:07:57,853 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-25 11:07:57,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:57,853 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-25 11:07:57,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 16 states have internal predecessors, (35), 9 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-25 11:07:57,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:57,854 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-25 11:07:57,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-25 11:07:57,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:57,855 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:57,867 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 11:07:58,059 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:58,060 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:58,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:58,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-25 11:07:58,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:58,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18277782] [2024-09-25 11:07:58,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:58,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:58,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:07:58,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [469696516] [2024-09-25 11:07:58,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:58,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:58,087 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 11:07:58,088 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 11:07:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:58,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-25 11:07:58,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-25 11:07:58,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:07:58,958 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-25 11:07:58,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18277782] [2024-09-25 11:07:58,959 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:07:58,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469696516] [2024-09-25 11:07:58,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469696516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:07:58,959 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:07:58,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-25 11:07:58,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743760638] [2024-09-25 11:07:58,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:07:58,960 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-25 11:07:58,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:07:58,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-25 11:07:58,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-25 11:07:58,961 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-25 11:07:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:07:59,386 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-25 11:07:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:07:59,386 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-25 11:07:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:07:59,387 INFO L225 Difference]: With dead ends: 145 [2024-09-25 11:07:59,387 INFO L226 Difference]: Without dead ends: 111 [2024-09-25 11:07:59,388 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:07:59,388 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 25 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:07:59,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 414 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:07:59,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-25 11:07:59,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-25 11:07:59,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-25 11:07:59,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-25 11:07:59,410 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-25 11:07:59,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:07:59,410 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-25 11:07:59,410 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-25 11:07:59,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:59,411 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-25 11:07:59,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-25 11:07:59,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:07:59,412 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:07:59,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-25 11:07:59,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:59,616 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:07:59,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:07:59,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-25 11:07:59,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:07:59,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802549851] [2024-09-25 11:07:59,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:07:59,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:07:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:07:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:07:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:07:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:07:59,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:07:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:07:59,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:07:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:07:59,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:07:59,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 11:07:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 11:07:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 11:07:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 11:07:59,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 11:07:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:07:59,801 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-25 11:07:59,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:07:59,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802549851] [2024-09-25 11:07:59,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802549851] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:07:59,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333754180] [2024-09-25 11:07:59,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:07:59,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:07:59,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:07:59,803 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 11:07:59,804 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 11:07:59,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:07:59,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:07:59,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 11:07:59,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:07:59,893 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-25 11:07:59,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:00,000 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-25 11:08:00,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333754180] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:00,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:08:00,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-25 11:08:00,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202726823] [2024-09-25 11:08:00,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:00,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:08:00,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:00,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:08:00,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:08:00,006 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-25 11:08:00,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:00,073 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-25 11:08:00,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-25 11:08:00,073 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-25 11:08:00,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:00,074 INFO L225 Difference]: With dead ends: 124 [2024-09-25 11:08:00,074 INFO L226 Difference]: Without dead ends: 102 [2024-09-25 11:08:00,074 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-25 11:08:00,075 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:00,075 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:08:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-25 11:08:00,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-25 11:08:00,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-25 11:08:00,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-25 11:08:00,099 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-25 11:08:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:00,100 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-25 11:08:00,100 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-25 11:08:00,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-25 11:08:00,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-25 11:08:00,101 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:00,101 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:00,113 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 11:08:00,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-25 11:08:00,305 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:00,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:00,305 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-25 11:08:00,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:00,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111644426] [2024-09-25 11:08:00,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:00,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:00,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:08:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:08:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:08:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:08:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:08:00,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:08:00,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:08:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:08:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:08:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 11:08:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 11:08:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 11:08:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-25 11:08:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-25 11:08:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-25 11:08:00,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-25 11:08:00,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111644426] [2024-09-25 11:08:00,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111644426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:08:00,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160333612] [2024-09-25 11:08:00,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:00,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:00,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:00,502 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 11:08:00,503 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 11:08:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:00,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-25 11:08:00,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-25 11:08:00,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-25 11:08:01,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160333612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:01,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:08:01,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-25 11:08:01,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297620943] [2024-09-25 11:08:01,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:01,029 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-25 11:08:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:01,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-25 11:08:01,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-25 11:08:01,030 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-25 11:08:01,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:01,237 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-25 11:08:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-25 11:08:01,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-25 11:08:01,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:01,238 INFO L225 Difference]: With dead ends: 117 [2024-09-25 11:08:01,239 INFO L226 Difference]: Without dead ends: 100 [2024-09-25 11:08:01,239 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-25 11:08:01,239 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 27 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:01,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 384 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:08:01,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-25 11:08:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-25 11:08:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-25 11:08:01,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-25 11:08:01,258 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-25 11:08:01,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:01,258 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-25 11:08:01,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-25 11:08:01,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:01,259 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-25 11:08:01,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-25 11:08:01,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:01,260 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:01,273 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 11:08:01,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:01,464 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:01,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:01,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-25 11:08:01,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:01,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19815974] [2024-09-25 11:08:01,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:01,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:08:01,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:08:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:08:01,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:08:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:08:01,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:08:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:08:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:08:01,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:08:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 11:08:01,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 11:08:01,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 11:08:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 11:08:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 11:08:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 11:08:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-25 11:08:01,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,574 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-25 11:08:01,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:01,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19815974] [2024-09-25 11:08:01,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19815974] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:08:01,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545604748] [2024-09-25 11:08:01,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:01,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:01,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:01,576 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 11:08:01,577 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 11:08:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:01,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-25 11:08:01,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:01,639 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-25 11:08:01,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 11:08:01,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545604748] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 11:08:01,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 11:08:01,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-25 11:08:01,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462770486] [2024-09-25 11:08:01,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 11:08:01,641 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 11:08:01,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:01,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 11:08:01,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:08:01,642 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-25 11:08:01,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:01,695 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-25 11:08:01,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:08:01,695 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-25 11:08:01,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:01,696 INFO L225 Difference]: With dead ends: 100 [2024-09-25 11:08:01,696 INFO L226 Difference]: Without dead ends: 88 [2024-09-25 11:08:01,696 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-25 11:08:01,709 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 7 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:01,709 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 11:08:01,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-25 11:08:01,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-25 11:08:01,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-25 11:08:01,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-25 11:08:01,729 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-25 11:08:01,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:01,730 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-25 11:08:01,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-25 11:08:01,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:01,730 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-25 11:08:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-25 11:08:01,731 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:01,731 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:01,745 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 11:08:01,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:01,932 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:01,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:01,933 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-25 11:08:01,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:01,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090316667] [2024-09-25 11:08:01,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:01,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:01,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:08:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [698130837] [2024-09-25 11:08:01,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-25 11:08:01,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:01,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:01,973 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 11:08:01,974 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 11:08:02,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-25 11:08:02,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:08:02,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-25 11:08:02,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:03,278 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-25 11:08:03,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:16,521 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 37 proven. 49 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2024-09-25 11:08:16,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:16,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090316667] [2024-09-25 11:08:16,521 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:08:16,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698130837] [2024-09-25 11:08:16,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698130837] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:16,522 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:08:16,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-25 11:08:16,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695031072] [2024-09-25 11:08:16,522 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:16,522 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-25 11:08:16,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-25 11:08:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:08:16,523 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-25 11:08:24,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:24,856 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2024-09-25 11:08:24,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-25 11:08:24,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 104 [2024-09-25 11:08:24,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:24,858 INFO L225 Difference]: With dead ends: 162 [2024-09-25 11:08:24,858 INFO L226 Difference]: Without dead ends: 140 [2024-09-25 11:08:24,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2024-09-25 11:08:24,859 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:24,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 433 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-25 11:08:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-25 11:08:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 128. [2024-09-25 11:08:24,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 75 states have (on average 1.12) internal successors, (84), 79 states have internal predecessors, (84), 38 states have call successors, (38), 15 states have call predecessors, (38), 14 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-25 11:08:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2024-09-25 11:08:24,927 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 104 [2024-09-25 11:08:24,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:24,929 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2024-09-25 11:08:24,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 12 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2024-09-25 11:08:24,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:24,930 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2024-09-25 11:08:24,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-25 11:08:24,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:24,933 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:24,940 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-25 11:08:25,137 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-25 11:08:25,138 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:25,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:25,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1973122394, now seen corresponding path program 2 times [2024-09-25 11:08:25,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:25,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202941122] [2024-09-25 11:08:25,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:25,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:08:25,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119120571] [2024-09-25 11:08:25,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:08:25,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:25,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:25,187 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 11:08:25,190 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 11:08:25,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:08:25,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:08:25,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 11:08:25,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:25,385 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 124 proven. 22 refuted. 0 times theorem prover too weak. 344 trivial. 0 not checked. [2024-09-25 11:08:25,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:25,547 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-25 11:08:25,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:25,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202941122] [2024-09-25 11:08:25,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:08:25,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119120571] [2024-09-25 11:08:25,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119120571] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:25,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:08:25,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2024-09-25 11:08:25,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147234302] [2024-09-25 11:08:25,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:25,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-25 11:08:25,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:25,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-25 11:08:25,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2024-09-25 11:08:25,548 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 11:08:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:26,066 INFO L93 Difference]: Finished difference Result 142 states and 169 transitions. [2024-09-25 11:08:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-25 11:08:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) Word has length 115 [2024-09-25 11:08:26,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:26,068 INFO L225 Difference]: With dead ends: 142 [2024-09-25 11:08:26,068 INFO L226 Difference]: Without dead ends: 140 [2024-09-25 11:08:26,068 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2024-09-25 11:08:26,068 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:26,069 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 216 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:08:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-25 11:08:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2024-09-25 11:08:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 84 states have (on average 1.1071428571428572) internal successors, (93), 88 states have internal predecessors, (93), 38 states have call successors, (38), 18 states have call predecessors, (38), 17 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-25 11:08:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 167 transitions. [2024-09-25 11:08:26,112 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 167 transitions. Word has length 115 [2024-09-25 11:08:26,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:26,112 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 167 transitions. [2024-09-25 11:08:26,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 5 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (16), 5 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-25 11:08:26,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:26,113 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 167 transitions. [2024-09-25 11:08:26,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-25 11:08:26,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:26,114 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:26,127 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-25 11:08:26,314 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-25 11:08:26,314 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:26,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:26,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1536141598, now seen corresponding path program 4 times [2024-09-25 11:08:26,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:26,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233505188] [2024-09-25 11:08:26,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:26,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:26,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:08:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:08:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:08:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:08:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:08:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:08:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:08:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:08:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:08:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 11:08:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 11:08:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 11:08:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 11:08:26,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 11:08:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 11:08:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 11:08:26,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 11:08:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-25 11:08:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-25 11:08:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:26,583 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-25 11:08:26,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233505188] [2024-09-25 11:08:26,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233505188] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:08:26,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975401445] [2024-09-25 11:08:26,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-25 11:08:26,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:26,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:26,586 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 11:08:26,587 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 11:08:26,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-25 11:08:26,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:08:26,641 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-25 11:08:26,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:26,671 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-25 11:08:26,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 498 backedges. 38 proven. 28 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2024-09-25 11:08:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975401445] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:26,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:08:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2024-09-25 11:08:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182127592] [2024-09-25 11:08:26,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:26,813 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 11:08:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 11:08:26,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:08:26,814 INFO L87 Difference]: Start difference. First operand 140 states and 167 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-25 11:08:26,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:26,924 INFO L93 Difference]: Finished difference Result 167 states and 200 transitions. [2024-09-25 11:08:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 11:08:26,925 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) Word has length 117 [2024-09-25 11:08:26,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:26,926 INFO L225 Difference]: With dead ends: 167 [2024-09-25 11:08:26,926 INFO L226 Difference]: Without dead ends: 144 [2024-09-25 11:08:26,926 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 11:08:26,927 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 1 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:26,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 273 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 11:08:26,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-25 11:08:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2024-09-25 11:08:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 85 states have (on average 1.1058823529411765) internal successors, (94), 90 states have internal predecessors, (94), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (37), 33 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-25 11:08:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 170 transitions. [2024-09-25 11:08:26,970 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 170 transitions. Word has length 117 [2024-09-25 11:08:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:26,970 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 170 transitions. [2024-09-25 11:08:26,971 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 states have internal predecessors, (39), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 6 states have call predecessors, (29), 6 states have call successors, (29) [2024-09-25 11:08:26,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 170 transitions. [2024-09-25 11:08:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-25 11:08:26,972 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:26,972 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:26,989 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 11:08:27,172 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-25 11:08:27,173 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:27,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:27,173 INFO L85 PathProgramCache]: Analyzing trace with hash 47128766, now seen corresponding path program 2 times [2024-09-25 11:08:27,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:27,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863165783] [2024-09-25 11:08:27,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:27,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 11:08:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 11:08:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-25 11:08:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-25 11:08:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-25 11:08:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-25 11:08:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-25 11:08:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-25 11:08:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-25 11:08:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 11:08:27,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-25 11:08:27,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-25 11:08:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-25 11:08:27,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-25 11:08:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-25 11:08:27,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-25 11:08:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-25 11:08:27,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-25 11:08:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-25 11:08:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-25 11:08:27,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 11:08:27,537 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-25 11:08:27,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:08:27,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863165783] [2024-09-25 11:08:27,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863165783] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 11:08:27,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004369339] [2024-09-25 11:08:27,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-25 11:08:27,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:27,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:27,539 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 11:08:27,540 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 11:08:27,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-25 11:08:27,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:08:27,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-25 11:08:27,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:28,024 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-25 11:08:28,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:08:28,851 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 52 proven. 53 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-25 11:08:28,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004369339] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:08:28,852 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 11:08:28,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15, 14] total 30 [2024-09-25 11:08:28,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127231902] [2024-09-25 11:08:28,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 11:08:28,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-25 11:08:28,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:08:28,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-25 11:08:28,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-25 11:08:28,854 INFO L87 Difference]: Start difference. First operand 142 states and 170 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-25 11:08:29,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 11:08:29,448 INFO L93 Difference]: Finished difference Result 158 states and 191 transitions. [2024-09-25 11:08:29,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-25 11:08:29,448 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-25 11:08:29,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 11:08:29,450 INFO L225 Difference]: With dead ends: 158 [2024-09-25 11:08:29,450 INFO L226 Difference]: Without dead ends: 130 [2024-09-25 11:08:29,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=1192, Unknown=0, NotChecked=0, Total=1406 [2024-09-25 11:08:29,451 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 23 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 530 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-25 11:08:29,451 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 530 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-25 11:08:29,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-25 11:08:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2024-09-25 11:08:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 76 states have (on average 1.0921052631578947) internal successors, (83), 80 states have internal predecessors, (83), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (30), 27 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-25 11:08:29,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 145 transitions. [2024-09-25 11:08:29,481 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 145 transitions. Word has length 120 [2024-09-25 11:08:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 11:08:29,481 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 145 transitions. [2024-09-25 11:08:29,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 27 states have internal predecessors, (62), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 19 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-25 11:08:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:29,482 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 145 transitions. [2024-09-25 11:08:29,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-25 11:08:29,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 11:08:29,483 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 11:08:29,496 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 11:08:29,683 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-25 11:08:29,684 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 11:08:29,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 11:08:29,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1414642200, now seen corresponding path program 5 times [2024-09-25 11:08:29,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 11:08:29,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834311278] [2024-09-25 11:08:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 11:08:29,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 11:08:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 11:08:29,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407274693] [2024-09-25 11:08:29,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-25 11:08:29,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 11:08:29,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 11:08:29,726 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 11:08:29,726 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 11:08:29,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-25 11:08:29,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-25 11:08:29,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-25 11:08:29,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 11:08:30,506 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-25 11:08:30,506 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 11:09:56,437 WARN L293 SmtUtils]: Spent 11.43s on a formula simplification that was a NOOP. DAG size: 242 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 11:11:03,023 WARN L293 SmtUtils]: Spent 17.62s on a formula simplification that was a NOOP. DAG size: 244 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-25 11:11:25,305 WARN L293 SmtUtils]: Spent 5.23s on a formula simplification that was a NOOP. DAG size: 7 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-25 11:12:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 82 proven. 101 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2024-09-25 11:12:04,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 11:12:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834311278] [2024-09-25 11:12:04,005 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 11:12:04,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407274693] [2024-09-25 11:12:04,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407274693] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 11:12:04,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-25 11:12:04,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2024-09-25 11:12:04,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015985528] [2024-09-25 11:12:04,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-25 11:12:04,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-25 11:12:04,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 11:12:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-25 11:12:04,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=804, Unknown=1, NotChecked=0, Total=992 [2024-09-25 11:12:04,007 INFO L87 Difference]: Start difference. First operand 126 states and 145 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 29 states have internal predecessors, (57), 19 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (40), 15 states have call predecessors, (40), 17 states have call successors, (40) [2024-09-25 11:12:27,398 WARN L293 SmtUtils]: Spent 20.66s on a formula simplification. DAG size of input: 432 DAG size of output: 77 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)