./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.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/cohendiv-ll_unwindbound20.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 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --traceabstraction.encode.modifies.clause.in.ensures.clause.of.contracts true --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-fb1cb0b-m [2024-09-25 10:43:59,406 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-25 10:43:59,459 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-25 10:43:59,462 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-25 10:43:59,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-25 10:43:59,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-25 10:43:59,490 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-25 10:43:59,490 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-25 10:43:59,491 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-25 10:43:59,491 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-25 10:43:59,491 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-25 10:43:59,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-25 10:43:59,492 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-25 10:43:59,492 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-25 10:43:59,492 INFO L153 SettingsManager]: * Use SBE=true [2024-09-25 10:43:59,493 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-25 10:43:59,493 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-25 10:43:59,493 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-25 10:43:59,493 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-25 10:43:59,493 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-25 10:43:59,494 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-25 10:43:59,498 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-25 10:43:59,498 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-25 10:43:59,498 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-25 10:43:59,502 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-25 10:43:59,502 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-25 10:43:59,502 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-25 10:43:59,503 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-25 10:43:59,503 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-25 10:43:59,503 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-25 10:43:59,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-25 10:43:59,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-25 10:43:59,503 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:43:59,503 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-25 10:43:59,504 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-25 10:43:59,504 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-25 10:43:59,504 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-25 10:43:59,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-25 10:43:59,507 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-25 10:43:59,507 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-25 10:43:59,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-25 10:43:59,507 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-25 10:43:59,507 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 -> 93ad3f0e42b4c26a38d8e528f550b89aecdadec634fd1fe3b21f86af4528c655 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Encode 'modifies' clause in 'ensures' clause of contracts -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-25 10:43:59,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-25 10:43:59,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-25 10:43:59,741 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-25 10:43:59,741 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-25 10:43:59,742 INFO L274 PluginConnector]: CDTParser initialized [2024-09-25 10:43:59,743 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2024-09-25 10:44:01,127 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-25 10:44:01,259 INFO L384 CDTParser]: Found 1 translation units. [2024-09-25 10:44:01,259 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/cohendiv-ll_unwindbound20.c [2024-09-25 10:44:01,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/094e3a364/7479e77f47e2443e9071074c16c28e52/FLAG296c5da5f [2024-09-25 10:44:01,691 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/094e3a364/7479e77f47e2443e9071074c16c28e52 [2024-09-25 10:44:01,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-25 10:44:01,694 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-25 10:44:01,695 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-25 10:44:01,695 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-25 10:44:01,702 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-25 10:44:01,703 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,704 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23a084c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01, skipping insertion in model container [2024-09-25 10:44:01,704 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,720 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-25 10:44:01,840 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/cohendiv-ll_unwindbound20.c[576,589] [2024-09-25 10:44:01,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:44:01,867 INFO L200 MainTranslator]: Completed pre-run [2024-09-25 10:44:01,876 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/cohendiv-ll_unwindbound20.c[576,589] [2024-09-25 10:44:01,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-25 10:44:01,897 INFO L204 MainTranslator]: Completed translation [2024-09-25 10:44:01,897 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01 WrapperNode [2024-09-25 10:44:01,897 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-25 10:44:01,899 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-25 10:44:01,899 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-25 10:44:01,899 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-25 10:44:01,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,908 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,912 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-25 10:44:01,912 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-25 10:44:01,913 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-25 10:44:01,913 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-25 10:44:01,913 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-25 10:44:01,919 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,920 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,920 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,932 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-25 10:44:01,933 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,933 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,935 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,940 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,940 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,941 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,942 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-25 10:44:01,943 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-25 10:44:01,944 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-25 10:44:01,944 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-25 10:44:01,945 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (1/1) ... [2024-09-25 10:44:01,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-25 10:44:01,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:01,984 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-25 10:44:01,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-25 10:44:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-25 10:44:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-25 10:44:02,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-25 10:44:02,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-25 10:44:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-25 10:44:02,015 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-25 10:44:02,015 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-25 10:44:02,067 INFO L241 CfgBuilder]: Building ICFG [2024-09-25 10:44:02,069 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-25 10:44:02,223 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-25 10:44:02,223 INFO L290 CfgBuilder]: Performing block encoding [2024-09-25 10:44:02,241 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-25 10:44:02,242 INFO L317 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-25 10:44:02,242 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:44:02 BoogieIcfgContainer [2024-09-25 10:44:02,243 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-25 10:44:02,244 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-25 10:44:02,244 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-25 10:44:02,247 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-25 10:44:02,247 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 10:44:01" (1/3) ... [2024-09-25 10:44:02,248 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264b00d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:44:02, skipping insertion in model container [2024-09-25 10:44:02,248 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 10:44:01" (2/3) ... [2024-09-25 10:44:02,249 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@264b00d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 10:44:02, skipping insertion in model container [2024-09-25 10:44:02,249 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:44:02" (3/3) ... [2024-09-25 10:44:02,251 INFO L112 eAbstractionObserver]: Analyzing ICFG cohendiv-ll_unwindbound20.c [2024-09-25 10:44:02,263 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-25 10:44:02,263 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-25 10:44:02,307 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-25 10:44:02,312 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;@222e963f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-25 10:44:02,312 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-25 10:44:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-25 10:44:02,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-25 10:44:02,321 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:02,322 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:02,325 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:02,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:02,328 INFO L85 PathProgramCache]: Analyzing trace with hash -166019731, now seen corresponding path program 1 times [2024-09-25 10:44:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642693910] [2024-09-25 10:44:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:02,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:02,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:44:02,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:02,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642693910] [2024-09-25 10:44:02,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642693910] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:02,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:02,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-25 10:44:02,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658804542] [2024-09-25 10:44:02,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:02,488 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-25 10:44:02,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:02,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-25 10:44:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:44:02,517 INFO L87 Difference]: Start difference. First operand has 36 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 10:44:02,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:02,618 INFO L93 Difference]: Finished difference Result 65 states and 98 transitions. [2024-09-25 10:44:02,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-25 10:44:02,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 16 [2024-09-25 10:44:02,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:02,627 INFO L225 Difference]: With dead ends: 65 [2024-09-25 10:44:02,627 INFO L226 Difference]: Without dead ends: 33 [2024-09-25 10:44:02,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-25 10:44:02,635 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 10 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:02,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 46 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:02,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-25 10:44:02,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2024-09-25 10:44:02,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:44:02,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-25 10:44:02,675 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 16 [2024-09-25 10:44:02,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:02,676 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-25 10:44:02,676 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 10:44:02,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:02,677 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-25 10:44:02,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:44:02,678 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:02,678 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:02,678 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-25 10:44:02,679 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:02,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:02,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1899526296, now seen corresponding path program 1 times [2024-09-25 10:44:02,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:02,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766005276] [2024-09-25 10:44:02,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:02,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:02,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:02,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:44:02,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:02,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766005276] [2024-09-25 10:44:02,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766005276] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:02,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:02,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:44:02,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038990123] [2024-09-25 10:44:02,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:02,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:44:02,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:02,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:44:02,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:44:02,831 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:44:02,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:02,906 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2024-09-25 10:44:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:44:02,907 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 17 [2024-09-25 10:44:02,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:02,908 INFO L225 Difference]: With dead ends: 41 [2024-09-25 10:44:02,908 INFO L226 Difference]: Without dead ends: 34 [2024-09-25 10:44:02,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:44:02,909 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:02,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 77 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-25 10:44:02,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-09-25 10:44:02,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.25) internal successors, (25), 21 states have internal predecessors, (25), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-25 10:44:02,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2024-09-25 10:44:02,917 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 17 [2024-09-25 10:44:02,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:02,917 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2024-09-25 10:44:02,918 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), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-25 10:44:02,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:02,918 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2024-09-25 10:44:02,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-25 10:44:02,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:02,919 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:02,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-25 10:44:02,919 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:02,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1901015846, now seen corresponding path program 1 times [2024-09-25 10:44:02,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:02,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564230902] [2024-09-25 10:44:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:02,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:02,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:44:02,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [700716023] [2024-09-25 10:44:02,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:02,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:02,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:02,934 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:02,936 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-25 10:44:02,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:02,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:44:02,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:44:03,033 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:44:03,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564230902] [2024-09-25 10:44:03,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:44:03,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700716023] [2024-09-25 10:44:03,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700716023] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:03,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:03,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:44:03,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383840379] [2024-09-25 10:44:03,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:03,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:44:03,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:03,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:44:03,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:44:03,038 INFO L87 Difference]: Start difference. First operand 34 states and 43 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 10:44:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:03,087 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-25 10:44:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:44:03,087 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2024-09-25 10:44:03,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:03,088 INFO L225 Difference]: With dead ends: 44 [2024-09-25 10:44:03,088 INFO L226 Difference]: Without dead ends: 42 [2024-09-25 10:44:03,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:44:03,090 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 4 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:03,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 135 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:44:03,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-25 10:44:03,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 39. [2024-09-25 10:44:03,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 states have internal predecessors, (28), 11 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-25 10:44:03,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2024-09-25 10:44:03,099 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 17 [2024-09-25 10:44:03,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:03,099 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2024-09-25 10:44:03,099 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, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-25 10:44:03,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:03,100 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2024-09-25 10:44:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-25 10:44:03,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:03,100 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:03,114 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 10:44:03,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:03,301 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:03,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:03,302 INFO L85 PathProgramCache]: Analyzing trace with hash 1706287866, now seen corresponding path program 1 times [2024-09-25 10:44:03,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:03,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546967638] [2024-09-25 10:44:03,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:03,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:44:03,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1474914483] [2024-09-25 10:44:03,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:03,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:03,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:03,337 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:03,340 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-25 10:44:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:03,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:44:03,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:03,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-25 10:44:03,407 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:44:03,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:03,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546967638] [2024-09-25 10:44:03,408 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:44:03,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474914483] [2024-09-25 10:44:03,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1474914483] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:03,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:03,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:44:03,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839499391] [2024-09-25 10:44:03,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:03,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:44:03,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:03,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:44:03,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:44:03,410 INFO L87 Difference]: Start difference. First operand 39 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 10:44:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:03,458 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2024-09-25 10:44:03,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:44:03,459 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-25 10:44:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:03,460 INFO L225 Difference]: With dead ends: 57 [2024-09-25 10:44:03,460 INFO L226 Difference]: Without dead ends: 54 [2024-09-25 10:44:03,460 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:44:03,461 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 11 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:03,461 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 124 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:44:03,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-25 10:44:03,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-25 10:44:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 32 states have internal predecessors, (38), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-25 10:44:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2024-09-25 10:44:03,471 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 22 [2024-09-25 10:44:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:03,471 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2024-09-25 10:44:03,471 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-25 10:44:03,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2024-09-25 10:44:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-25 10:44:03,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:03,473 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:03,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-25 10:44:03,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:03,676 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:03,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:03,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1856957465, now seen corresponding path program 1 times [2024-09-25 10:44:03,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:03,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292164733] [2024-09-25 10:44:03,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:03,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:44:03,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1912167741] [2024-09-25 10:44:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:03,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:03,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:03,712 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:03,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-25 10:44:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:03,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-25 10:44:03,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:44:03,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:44:03,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292164733] [2024-09-25 10:44:03,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:44:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912167741] [2024-09-25 10:44:03,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912167741] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:03,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:03,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-25 10:44:03,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377332627] [2024-09-25 10:44:03,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:03,798 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-25 10:44:03,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:03,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-25 10:44:03,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-25 10:44:03,799 INFO L87 Difference]: Start difference. First operand 53 states and 68 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, (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 10:44:03,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:03,849 INFO L93 Difference]: Finished difference Result 82 states and 112 transitions. [2024-09-25 10:44:03,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:44:03,850 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, (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 30 [2024-09-25 10:44:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:03,851 INFO L225 Difference]: With dead ends: 82 [2024-09-25 10:44:03,851 INFO L226 Difference]: Without dead ends: 80 [2024-09-25 10:44:03,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-25 10:44:03,852 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 11 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:03,852 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 141 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-25 10:44:03,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-25 10:44:03,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2024-09-25 10:44:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 45 states have internal predecessors, (55), 23 states have call successors, (23), 7 states have call predecessors, (23), 6 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-25 10:44:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 99 transitions. [2024-09-25 10:44:03,865 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 99 transitions. Word has length 30 [2024-09-25 10:44:03,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:03,865 INFO L474 AbstractCegarLoop]: Abstraction has 73 states and 99 transitions. [2024-09-25 10:44:03,865 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, (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 10:44:03,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 99 transitions. [2024-09-25 10:44:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-25 10:44:03,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:03,866 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:03,878 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-25 10:44:04,066 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:04,067 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:04,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,068 INFO L85 PathProgramCache]: Analyzing trace with hash 1900127414, now seen corresponding path program 1 times [2024-09-25 10:44:04,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:04,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551161810] [2024-09-25 10:44:04,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:04,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:04,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:04,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:44:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:44:04,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-25 10:44:04,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:04,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551161810] [2024-09-25 10:44:04,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551161810] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:04,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:04,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-25 10:44:04,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186138439] [2024-09-25 10:44:04,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:04,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-25 10:44:04,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:04,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-25 10:44:04,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-25 10:44:04,249 INFO L87 Difference]: Start difference. First operand 73 states and 99 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 10:44:04,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:04,341 INFO L93 Difference]: Finished difference Result 112 states and 152 transitions. [2024-09-25 10:44:04,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-25 10:44:04,342 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 33 [2024-09-25 10:44:04,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:04,344 INFO L225 Difference]: With dead ends: 112 [2024-09-25 10:44:04,344 INFO L226 Difference]: Without dead ends: 77 [2024-09-25 10:44:04,344 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:44:04,345 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:04,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 74 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:04,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-25 10:44:04,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2024-09-25 10:44:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 48 states have internal predecessors, (57), 23 states have call successors, (23), 8 states have call predecessors, (23), 7 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-25 10:44:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 101 transitions. [2024-09-25 10:44:04,365 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 101 transitions. Word has length 33 [2024-09-25 10:44:04,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:04,366 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 101 transitions. [2024-09-25 10:44:04,366 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-25 10:44:04,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,366 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 101 transitions. [2024-09-25 10:44:04,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-25 10:44:04,368 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:04,368 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:04,368 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-25 10:44:04,368 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:04,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,369 INFO L85 PathProgramCache]: Analyzing trace with hash -2073680743, now seen corresponding path program 1 times [2024-09-25 10:44:04,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:04,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966658578] [2024-09-25 10:44:04,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:04,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:04,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:44:04,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:44:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:44:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:44:04,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,503 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-25 10:44:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:04,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966658578] [2024-09-25 10:44:04,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966658578] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:04,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-25 10:44:04,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-09-25 10:44:04,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816801930] [2024-09-25 10:44:04,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:04,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-25 10:44:04,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:04,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-25 10:44:04,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-25 10:44:04,505 INFO L87 Difference]: Start difference. First operand 77 states and 101 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 10:44:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:04,634 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2024-09-25 10:44:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:44:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 40 [2024-09-25 10:44:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:04,636 INFO L225 Difference]: With dead ends: 83 [2024-09-25 10:44:04,636 INFO L226 Difference]: Without dead ends: 81 [2024-09-25 10:44:04,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-25 10:44:04,637 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:04,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 121 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:04,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-25 10:44:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-25 10:44:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 49 states have (on average 1.2244897959183674) internal successors, (60), 51 states have internal predecessors, (60), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2024-09-25 10:44:04,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 104 transitions. [2024-09-25 10:44:04,647 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 104 transitions. Word has length 40 [2024-09-25 10:44:04,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:04,648 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 104 transitions. [2024-09-25 10:44:04,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-25 10:44:04,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,648 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 104 transitions. [2024-09-25 10:44:04,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-25 10:44:04,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:04,649 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:04,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-25 10:44:04,650 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:04,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,650 INFO L85 PathProgramCache]: Analyzing trace with hash -930915559, now seen corresponding path program 1 times [2024-09-25 10:44:04,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:04,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699776911] [2024-09-25 10:44:04,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:04,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:44:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:44:04,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:44:04,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:44:04,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:44:04,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,761 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 7 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-25 10:44:04,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:04,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699776911] [2024-09-25 10:44:04,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699776911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:44:04,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477151114] [2024-09-25 10:44:04,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:04,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:04,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:04,763 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:04,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-25 10:44:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:04,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-25 10:44:04,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:44:04,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-25 10:44:04,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477151114] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-25 10:44:04,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:44:04,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2024-09-25 10:44:04,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967419211] [2024-09-25 10:44:04,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:04,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-25 10:44:04,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:04,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-25 10:44:04,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:44:04,863 INFO L87 Difference]: Start difference. First operand 81 states and 104 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 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 10:44:04,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:04,970 INFO L93 Difference]: Finished difference Result 94 states and 120 transitions. [2024-09-25 10:44:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-25 10:44:04,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 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 46 [2024-09-25 10:44:04,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:04,971 INFO L225 Difference]: With dead ends: 94 [2024-09-25 10:44:04,972 INFO L226 Difference]: Without dead ends: 92 [2024-09-25 10:44:04,972 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2024-09-25 10:44:04,972 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 11 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:04,973 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 185 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:04,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2024-09-25 10:44:04,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2024-09-25 10:44:04,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 52 states have (on average 1.2115384615384615) internal successors, (63), 56 states have internal predecessors, (63), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (23), 20 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-25 10:44:04,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 111 transitions. [2024-09-25 10:44:04,984 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 111 transitions. Word has length 46 [2024-09-25 10:44:04,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:04,984 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 111 transitions. [2024-09-25 10:44:04,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 3 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 10:44:04,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:04,985 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 111 transitions. [2024-09-25 10:44:04,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-25 10:44:04,985 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:04,985 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:04,998 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-25 10:44:05,189 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 10:44:05,190 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:05,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -872582608, now seen corresponding path program 1 times [2024-09-25 10:44:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:05,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245185603] [2024-09-25 10:44:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:05,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,307 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:05,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:05,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:44:05,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:44:05,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:44:05,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:44:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:44:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:44:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245185603] [2024-09-25 10:44:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245185603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:44:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116075065] [2024-09-25 10:44:05,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:05,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:05,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:05,332 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:05,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-25 10:44:05,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:05,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:44:05,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-25 10:44:05,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:44:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-25 10:44:05,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116075065] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:44:05,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:44:05,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 13 [2024-09-25 10:44:05,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195385893] [2024-09-25 10:44:05,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:44:05,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-25 10:44:05,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:05,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-25 10:44:05,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2024-09-25 10:44:05,544 INFO L87 Difference]: Start difference. First operand 87 states and 111 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-25 10:44:05,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:05,823 INFO L93 Difference]: Finished difference Result 254 states and 311 transitions. [2024-09-25 10:44:05,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-25 10:44:05,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 49 [2024-09-25 10:44:05,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:05,826 INFO L225 Difference]: With dead ends: 254 [2024-09-25 10:44:05,826 INFO L226 Difference]: Without dead ends: 247 [2024-09-25 10:44:05,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-25 10:44:05,828 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 109 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:05,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 148 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-25 10:44:05,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-25 10:44:05,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 231. [2024-09-25 10:44:05,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 146 states have (on average 1.1986301369863013) internal successors, (175), 155 states have internal predecessors, (175), 58 states have call successors, (58), 27 states have call predecessors, (58), 26 states have return successors, (53), 48 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-25 10:44:05,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 286 transitions. [2024-09-25 10:44:05,857 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 286 transitions. Word has length 49 [2024-09-25 10:44:05,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:05,857 INFO L474 AbstractCegarLoop]: Abstraction has 231 states and 286 transitions. [2024-09-25 10:44:05,858 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 9 states have call successors, (24), 8 states have call predecessors, (24), 6 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2024-09-25 10:44:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:05,858 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 286 transitions. [2024-09-25 10:44:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-25 10:44:05,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:05,859 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:05,874 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 10:44:06,059 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 10:44:06,060 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:06,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:06,060 INFO L85 PathProgramCache]: Analyzing trace with hash 260253794, now seen corresponding path program 1 times [2024-09-25 10:44:06,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:06,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760811596] [2024-09-25 10:44:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:06,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:06,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-25 10:44:06,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833561482] [2024-09-25 10:44:06,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:06,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:06,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:06,079 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:06,081 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-25 10:44:06,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:06,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-25 10:44:06,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:44:06,353 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:44:06,556 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-25 10:44:06,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760811596] [2024-09-25 10:44:06,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-25 10:44:06,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833561482] [2024-09-25 10:44:06,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833561482] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-25 10:44:06,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-25 10:44:06,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [11] total 17 [2024-09-25 10:44:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781971997] [2024-09-25 10:44:06,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-25 10:44:06,557 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-25 10:44:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-25 10:44:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-09-25 10:44:06,558 INFO L87 Difference]: Start difference. First operand 231 states and 286 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-25 10:44:06,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:06,666 INFO L93 Difference]: Finished difference Result 249 states and 303 transitions. [2024-09-25 10:44:06,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-25 10:44:06,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 54 [2024-09-25 10:44:06,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:06,668 INFO L225 Difference]: With dead ends: 249 [2024-09-25 10:44:06,668 INFO L226 Difference]: Without dead ends: 243 [2024-09-25 10:44:06,669 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2024-09-25 10:44:06,669 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 35 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:06,669 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 113 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:06,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-25 10:44:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 178. [2024-09-25 10:44:06,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 114 states have (on average 1.131578947368421) internal successors, (129), 119 states have internal predecessors, (129), 39 states have call successors, (39), 25 states have call predecessors, (39), 24 states have return successors, (38), 33 states have call predecessors, (38), 38 states have call successors, (38) [2024-09-25 10:44:06,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 206 transitions. [2024-09-25 10:44:06,720 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 206 transitions. Word has length 54 [2024-09-25 10:44:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:06,720 INFO L474 AbstractCegarLoop]: Abstraction has 178 states and 206 transitions. [2024-09-25 10:44:06,720 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2024-09-25 10:44:06,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 206 transitions. [2024-09-25 10:44:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-25 10:44:06,721 INFO L208 NwaCegarLoop]: Found error trace [2024-09-25 10:44:06,721 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 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] [2024-09-25 10:44:06,733 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-25 10:44:06,925 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 10:44:06,926 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-25 10:44:06,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:06,926 INFO L85 PathProgramCache]: Analyzing trace with hash -1070557628, now seen corresponding path program 1 times [2024-09-25 10:44:06,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-25 10:44:06,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661662601] [2024-09-25 10:44:06,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:06,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-25 10:44:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-25 10:44:07,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-25 10:44:07,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-25 10:44:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-25 10:44:07,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-25 10:44:07,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-25 10:44:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-25 10:44:07,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-25 10:44:07,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-25 10:44:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-25 10:44:07,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-25 10:44:07,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-25 10:44:07,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-25 10:44:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661662601] [2024-09-25 10:44:07,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661662601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-25 10:44:07,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274981878] [2024-09-25 10:44:07,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-25 10:44:07,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-25 10:44:07,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-25 10:44:07,060 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-25 10:44:07,063 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-25 10:44:07,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-25 10:44:07,100 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-25 10:44:07,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-25 10:44:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-25 10:44:07,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-25 10:44:07,202 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 39 proven. 7 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2024-09-25 10:44:07,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274981878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-25 10:44:07,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-25 10:44:07,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2024-09-25 10:44:07,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967097826] [2024-09-25 10:44:07,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-25 10:44:07,203 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-25 10:44:07,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-25 10:44:07,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-25 10:44:07,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-25 10:44:07,204 INFO L87 Difference]: Start difference. First operand 178 states and 206 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 10:44:07,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-25 10:44:07,361 INFO L93 Difference]: Finished difference Result 190 states and 215 transitions. [2024-09-25 10:44:07,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-25 10:44:07,362 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 70 [2024-09-25 10:44:07,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-25 10:44:07,362 INFO L225 Difference]: With dead ends: 190 [2024-09-25 10:44:07,363 INFO L226 Difference]: Without dead ends: 0 [2024-09-25 10:44:07,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2024-09-25 10:44:07,364 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-25 10:44:07,364 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 116 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-25 10:44:07,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-25 10:44:07,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-25 10:44:07,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-25 10:44:07,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-25 10:44:07,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 70 [2024-09-25 10:44:07,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-25 10:44:07,365 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-25 10:44:07,365 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (16), 4 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-25 10:44:07,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-25 10:44:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-25 10:44:07,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-25 10:44:07,367 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-25 10:44:07,380 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-25 10:44:07,571 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 10:44:07,574 INFO L408 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-25 10:44:07,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-25 10:44:08,927 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-25 10:44:08,941 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,941 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,942 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,943 WARN L156 FloydHoareUtils]: Requires clause for main contained old-variable. Original clause: (and (= ~counter~0 0) (= |old(~counter~0)| 0)) Eliminated clause: (= ~counter~0 0) [2024-09-25 10:44:08,943 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,943 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,943 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,943 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #length [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,944 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #StackHeapBarrier [2024-09-25 10:44:08,945 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,945 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #memory_int#0 [2024-09-25 10:44:08,945 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,945 WARN L953 BoogieBacktranslator]: Unfinished Backtranslation: Unknown variable: #valid [2024-09-25 10:44:08,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 10:44:08 BoogieIcfgContainer [2024-09-25 10:44:08,945 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-25 10:44:08,945 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-25 10:44:08,945 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-25 10:44:08,945 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-25 10:44:08,946 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 10:44:02" (3/4) ... [2024-09-25 10:44:08,947 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-25 10:44:08,984 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-25 10:44:08,985 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-25 10:44:08,985 INFO L158 Benchmark]: Toolchain (without parser) took 7290.90ms. Allocated memory was 83.9MB in the beginning and 180.4MB in the end (delta: 96.5MB). Free memory was 51.5MB in the beginning and 140.4MB in the end (delta: -88.9MB). Peak memory consumption was 10.7MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,985 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 10:44:08,985 INFO L158 Benchmark]: CACSL2BoogieTranslator took 202.33ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 39.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,986 INFO L158 Benchmark]: Boogie Procedure Inliner took 13.54ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 38.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,986 INFO L158 Benchmark]: Boogie Preprocessor took 30.34ms. Allocated memory is still 83.9MB. Free memory was 38.6MB in the beginning and 36.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-25 10:44:08,986 INFO L158 Benchmark]: RCFGBuilder took 299.24ms. Allocated memory is still 83.9MB. Free memory was 36.8MB in the beginning and 51.2MB in the end (delta: -14.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,986 INFO L158 Benchmark]: TraceAbstraction took 6700.93ms. Allocated memory was 83.9MB in the beginning and 180.4MB in the end (delta: 96.5MB). Free memory was 50.8MB in the beginning and 142.5MB in the end (delta: -91.6MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,986 INFO L158 Benchmark]: Witness Printer took 39.33ms. Allocated memory is still 180.4MB. Free memory was 142.5MB in the beginning and 140.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-25 10:44:08,987 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 83.9MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 202.33ms. Allocated memory is still 83.9MB. Free memory was 51.5MB in the beginning and 39.7MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 13.54ms. Allocated memory is still 83.9MB. Free memory was 39.7MB in the beginning and 38.6MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.34ms. Allocated memory is still 83.9MB. Free memory was 38.6MB in the beginning and 36.8MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 299.24ms. Allocated memory is still 83.9MB. Free memory was 36.8MB in the beginning and 51.2MB in the end (delta: -14.4MB). Peak memory consumption was 7.9MB. Max. memory is 16.1GB. * TraceAbstraction took 6700.93ms. Allocated memory was 83.9MB in the beginning and 180.4MB in the end (delta: 96.5MB). Free memory was 50.8MB in the beginning and 142.5MB in the end (delta: -91.6MB). Peak memory consumption was 93.5MB. Max. memory is 16.1GB. * Witness Printer took 39.33ms. Allocated memory is still 180.4MB. Free memory was 142.5MB in the beginning and 140.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #length - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #StackHeapBarrier - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #memory_int#0 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Unknown variable: #valid * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 5.3s, OverallIterations: 11, TraceHistogramMax: 10, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 312 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 278 mSDsluCounter, 1280 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 949 mSDsCounter, 150 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 968 IncrementalHoareTripleChecker+Invalid, 1118 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 150 mSolverCounterUnsat, 331 mSDtfsCounter, 968 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 615 GetRequests, 510 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=231occurred in iteration=9, InterpolantAutomatonStates: 84, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.7s InterpolantComputationTime, 682 NumberOfCodeBlocks, 682 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 715 ConstructedInterpolants, 0 QuantifiedInterpolants, 1741 SizeOfPredicates, 14 NumberOfNonLiveVariables, 817 ConjunctsInSsa, 74 ConjunctsInUnsatCore, 17 InterpolantComputations, 9 PerfectInterpolantSequences, 905/967 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: (((((1 <= r) && (((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x))) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: ((((((((__int128) q * y) + r) + ((__int128) a * y)) == ((__int128) b + x)) && (\old(counter) == 0)) && (1 <= y)) && (b == ((__int128) a * y))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Requires: (counter == 0) Ensures: (((cond != 0) && (counter == \old(counter))) && (counter == 0)) - ProcedureContractResult [Line: 23]: Procedure Contract for main Derived contract for procedure main. Requires: (counter == 0) Ensures: (\old(counter) == 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (cond != 0) Ensures: ((cond != 0) && (counter == \old(counter))) RESULT: Ultimate proved your program to be correct! [2024-09-25 10:44:09,005 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE