./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.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 9d96fce9cba7910d867f13bc16c5bd69d4168f707f39f60b6964bcaea0f2a9ec --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:01:46,061 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:01:46,157 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:01:46,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:01:46,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:01:46,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:01:46,194 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:01:46,194 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:01:46,195 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:01:46,198 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:01:46,198 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:01:46,198 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:01:46,199 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:01:46,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:01:46,201 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:01:46,201 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:01:46,202 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:01:46,202 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:01:46,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:01:46,202 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:01:46,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:01:46,206 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:01:46,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:01:46,206 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:01:46,206 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:01:46,207 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:01:46,207 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:01:46,207 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:01:46,207 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:01:46,207 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:01:46,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:01:46,208 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:01:46,208 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:01:46,208 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:01:46,208 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:01:46,209 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:01:46,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:01:46,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:01:46,210 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:01:46,211 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:01:46,211 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:01:46,211 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:01:46,212 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9d96fce9cba7910d867f13bc16c5bd69d4168f707f39f60b6964bcaea0f2a9ec Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:01:46,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:01:46,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:01:46,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:01:46,514 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:01:46,514 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:01:46,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c [2024-09-12 16:01:47,982 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:01:48,178 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:01:48,179 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/geo1-ll_unwindbound5.c [2024-09-12 16:01:48,191 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/50aed8b41/f1d094ebb3264aaaa17ba3309ccaf766/FLAGb9f55952f [2024-09-12 16:01:48,211 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/50aed8b41/f1d094ebb3264aaaa17ba3309ccaf766 [2024-09-12 16:01:48,213 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:01:48,215 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:01:48,217 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:01:48,217 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:01:48,222 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:01:48,223 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,223 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ffc4c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48, skipping insertion in model container [2024-09-12 16:01:48,224 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,242 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:01:48,409 WARN L247 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/geo1-ll_unwindbound5.c[546,559] [2024-09-12 16:01:48,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:01:48,445 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:01:48,457 WARN L247 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/geo1-ll_unwindbound5.c[546,559] [2024-09-12 16:01:48,467 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:01:48,485 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:01:48,485 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48 WrapperNode [2024-09-12 16:01:48,486 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:01:48,487 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:01:48,487 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:01:48,487 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:01:48,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,506 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:01:48,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:01:48,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:01:48,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:01:48,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:01:48,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,519 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,536 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]. [2024-09-12 16:01:48,537 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,537 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,543 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,546 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,547 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,551 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,553 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:01:48,554 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:01:48,554 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:01:48,554 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:01:48,555 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (1/1) ... [2024-09-12 16:01:48,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:01:48,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:48,588 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) [2024-09-12 16:01:48,594 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 [2024-09-12 16:01:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:01:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 16:01:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 16:01:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:01:48,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:01:48,637 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:01:48,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:01:48,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:01:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:01:48,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:01:48,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 16:01:48,639 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 16:01:48,710 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:01:48,712 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:01:48,886 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-12 16:01:48,887 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:01:48,912 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:01:48,913 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-12 16:01:48,914 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:01:48 BoogieIcfgContainer [2024-09-12 16:01:48,914 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:01:48,929 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:01:48,929 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:01:48,933 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:01:48,933 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:01:48" (1/3) ... [2024-09-12 16:01:48,934 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d125fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:01:48, skipping insertion in model container [2024-09-12 16:01:48,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:01:48" (2/3) ... [2024-09-12 16:01:48,935 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d125fb1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:01:48, skipping insertion in model container [2024-09-12 16:01:48,935 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:01:48" (3/3) ... [2024-09-12 16:01:48,936 INFO L112 eAbstractionObserver]: Analyzing ICFG geo1-ll_unwindbound5.c [2024-09-12 16:01:48,953 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:01:48,954 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:01:49,015 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:01:49,023 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;@2a2abc80, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:01:49,024 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:01:49,028 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:01:49,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 16:01:49,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:49,036 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:49,036 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:49,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:49,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1666515900, now seen corresponding path program 1 times [2024-09-12 16:01:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:49,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126447906] [2024-09-12 16:01:49,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:49,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:49,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:49,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:49,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:49,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:49,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126447906] [2024-09-12 16:01:49,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126447906] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:49,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:49,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-12 16:01:49,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471480074] [2024-09-12 16:01:49,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:49,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-12 16:01:49,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:49,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-12 16:01:49,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 16:01:49,263 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:49,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:49,327 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2024-09-12 16:01:49,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-12 16:01:49,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2024-09-12 16:01:49,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:49,338 INFO L225 Difference]: With dead ends: 51 [2024-09-12 16:01:49,344 INFO L226 Difference]: Without dead ends: 25 [2024-09-12 16:01:49,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-12 16:01:49,351 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 10 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:49,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:01:49,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-12 16:01:49,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-12 16:01:49,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-12 16:01:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-12 16:01:49,384 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2024-09-12 16:01:49,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:49,384 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-12 16:01:49,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:49,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:49,385 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-12 16:01:49,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 16:01:49,387 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:49,387 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:49,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:01:49,387 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:49,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:49,388 INFO L85 PathProgramCache]: Analyzing trace with hash -387848543, now seen corresponding path program 1 times [2024-09-12 16:01:49,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:49,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716995798] [2024-09-12 16:01:49,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:49,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:49,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:49,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581399716] [2024-09-12 16:01:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:49,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:49,422 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) [2024-09-12 16:01:49,424 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:01:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:49,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 16:01:49,497 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:49,596 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:49,596 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 16:01:49,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:49,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716995798] [2024-09-12 16:01:49,597 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:01:49,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581399716] [2024-09-12 16:01:49,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581399716] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:49,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:49,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:01:49,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122343038] [2024-09-12 16:01:49,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:49,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:01:49,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:49,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:01:49,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:01:49,603 INFO L87 Difference]: Start difference. First operand 24 states and 27 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:01:49,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:49,666 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-12 16:01:49,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:01:49,667 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2024-09-12 16:01:49,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:49,668 INFO L225 Difference]: With dead ends: 35 [2024-09-12 16:01:49,668 INFO L226 Difference]: Without dead ends: 33 [2024-09-12 16:01:49,668 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 [2024-09-12 16:01:49,669 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 5 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:49,670 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 81 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 16:01:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-12 16:01:49,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2024-09-12 16:01:49,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:01:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2024-09-12 16:01:49,686 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2024-09-12 16:01:49,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:49,687 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2024-09-12 16:01:49,688 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, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 16:01:49,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:49,688 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2024-09-12 16:01:49,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 16:01:49,689 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:49,689 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:49,707 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:01:49,893 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:49,894 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:49,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:49,895 INFO L85 PathProgramCache]: Analyzing trace with hash 783720481, now seen corresponding path program 1 times [2024-09-12 16:01:49,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:49,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119706600] [2024-09-12 16:01:49,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:49,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:49,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:50,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,084 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:50,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119706600] [2024-09-12 16:01:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119706600] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:01:50,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:01:50,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:01:50,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058147777] [2024-09-12 16:01:50,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:01:50,085 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:01:50,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:50,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:01:50,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:01:50,087 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:50,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:50,155 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2024-09-12 16:01:50,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 16:01:50,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2024-09-12 16:01:50,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:50,159 INFO L225 Difference]: With dead ends: 39 [2024-09-12 16:01:50,159 INFO L226 Difference]: Without dead ends: 31 [2024-09-12 16:01:50,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 16:01:50,161 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 13 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:50,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 37 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:01:50,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-12 16:01:50,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-12 16:01:50,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 16:01:50,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2024-09-12 16:01:50,177 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 23 [2024-09-12 16:01:50,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:50,177 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2024-09-12 16:01:50,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 3 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 16:01:50,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:50,178 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2024-09-12 16:01:50,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 16:01:50,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:50,179 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:50,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 16:01:50,179 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:50,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:50,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1293449266, now seen corresponding path program 1 times [2024-09-12 16:01:50,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:50,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958275249] [2024-09-12 16:01:50,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:50,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:01:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:01:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,481 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:01:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 16:01:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:50,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:01:50,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958275249] [2024-09-12 16:01:50,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958275249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:01:50,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864619555] [2024-09-12 16:01:50,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:50,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:50,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:50,514 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) [2024-09-12 16:01:50,515 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:01:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:50,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 16:01:50,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:50,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:50,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:01:50,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:01:50,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864619555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:01:50,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:01:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2024-09-12 16:01:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028963521] [2024-09-12 16:01:50,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:01:50,931 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:01:50,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:01:50,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:01:50,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:01:50,932 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:01:55,288 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:01:55,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:01:55,341 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-12 16:01:55,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 16:01:55,341 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2024-09-12 16:01:55,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:01:55,343 INFO L225 Difference]: With dead ends: 45 [2024-09-12 16:01:55,343 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 16:01:55,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2024-09-12 16:01:55,344 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:01:55,345 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 101 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 144 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-12 16:01:55,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 16:01:55,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-12 16:01:55,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-12 16:01:55,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2024-09-12 16:01:55,357 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2024-09-12 16:01:55,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:01:55,358 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2024-09-12 16:01:55,359 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 11 states have internal predecessors, (26), 4 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 16:01:55,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2024-09-12 16:01:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 16:01:55,361 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:01:55,361 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:01:55,378 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:01:55,561 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 [2024-09-12 16:01:55,562 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:01:55,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:01:55,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1959775791, now seen corresponding path program 1 times [2024-09-12 16:01:55,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:01:55,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050351313] [2024-09-12 16:01:55,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:55,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:01:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:01:55,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098504402] [2024-09-12 16:01:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:01:55,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:01:55,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:01:55,600 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) [2024-09-12 16:01:55,602 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:01:55,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:01:55,672 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 16:01:55,676 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:01:55,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:01:55,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:02:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 10 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:02:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:02:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050351313] [2024-09-12 16:02:08,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:02:08,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098504402] [2024-09-12 16:02:08,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098504402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:02:08,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:02:08,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2024-09-12 16:02:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890292036] [2024-09-12 16:02:08,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:02:08,876 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:02:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:02:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:02:08,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=166, Unknown=3, NotChecked=0, Total=210 [2024-09-12 16:02:08,879 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 16:02:18,279 WARN L293 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:02:22,301 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:38,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:42,529 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:46,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:50,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:54,559 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:02:58,583 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:18,664 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:22,668 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:26,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:30,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:34,705 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:38,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:42,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:46,716 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:50,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:54,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:58,735 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:03:58,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:03:58,777 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-12 16:03:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 16:03:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 38 [2024-09-12 16:03:58,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:03:58,779 INFO L225 Difference]: With dead ends: 66 [2024-09-12 16:03:58,779 INFO L226 Difference]: Without dead ends: 64 [2024-09-12 16:03:58,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 49.9s TimeCoverageRelationStatistics Valid=74, Invalid=259, Unknown=9, NotChecked=0, Total=342 [2024-09-12 16:03:58,780 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 12 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.7s IncrementalHoareTripleChecker+Time [2024-09-12 16:03:58,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 214 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 150 Invalid, 18 Unknown, 0 Unchecked, 72.7s Time] [2024-09-12 16:03:58,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2024-09-12 16:03:58,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2024-09-12 16:03:58,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 40 states have (on average 1.15) internal successors, (46), 42 states have internal predecessors, (46), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:03:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2024-09-12 16:03:58,806 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 38 [2024-09-12 16:03:58,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:03:58,806 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2024-09-12 16:03:58,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 12 states have internal predecessors, (34), 8 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 16:03:58,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:58,807 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2024-09-12 16:03:58,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 16:03:58,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:03:58,808 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:03:58,823 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:03:59,009 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 [2024-09-12 16:03:59,009 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:03:59,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:59,009 INFO L85 PathProgramCache]: Analyzing trace with hash -701383951, now seen corresponding path program 1 times [2024-09-12 16:03:59,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:03:59,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320355208] [2024-09-12 16:03:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:59,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:03:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:03:59,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:03:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:03:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 16:03:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 16:03:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:03:59,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:03:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320355208] [2024-09-12 16:03:59,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320355208] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:03:59,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535599315] [2024-09-12 16:03:59,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:59,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:03:59,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:03:59,187 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) [2024-09-12 16:03:59,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:03:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:03:59,243 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 16:03:59,245 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:03:59,315 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:03:59,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:03:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 16:03:59,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535599315] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:03:59,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:03:59,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 12 [2024-09-12 16:03:59,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47322402] [2024-09-12 16:03:59,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:03:59,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 16:03:59,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:03:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 16:03:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-09-12 16:03:59,414 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-12 16:03:59,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:03:59,601 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2024-09-12 16:03:59,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 16:03:59,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) Word has length 39 [2024-09-12 16:03:59,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:03:59,603 INFO L225 Difference]: With dead ends: 75 [2024-09-12 16:03:59,603 INFO L226 Difference]: Without dead ends: 67 [2024-09-12 16:03:59,604 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:03:59,605 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:03:59,605 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:03:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-12 16:03:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2024-09-12 16:03:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.065217391304348) internal successors, (49), 48 states have internal predecessors, (49), 12 states have call successors, (12), 9 states have call predecessors, (12), 8 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-12 16:03:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2024-09-12 16:03:59,629 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 39 [2024-09-12 16:03:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:03:59,630 INFO L474 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2024-09-12 16:03:59,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 8 states have call successors, (18), 7 states have call predecessors, (18), 5 states have return successors, (15), 6 states have call predecessors, (15), 7 states have call successors, (15) [2024-09-12 16:03:59,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2024-09-12 16:03:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-12 16:03:59,632 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:03:59,632 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:03:59,649 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 16:03:59,833 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:03:59,833 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:03:59,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:03:59,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1794971433, now seen corresponding path program 2 times [2024-09-12 16:03:59,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:03:59,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891323810] [2024-09-12 16:03:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:03:59,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:03:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 16:03:59,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347621596] [2024-09-12 16:03:59,918 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:03:59,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:03:59,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:03:59,920 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) [2024-09-12 16:03:59,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:04:00,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:04:00,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:04:00,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 16:04:00,082 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:04:00,482 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-09-12 16:04:00,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:05:01,360 WARN L876 $PredicateComparison]: unable to prove that (= (mod (+ (* 18446744073709551615 c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* 18446744073709551615 c_main_~y~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0) (* c_main_~x~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0 c_main_~z~0)) 18446744073709551616) 0) is different from true [2024-09-12 16:05:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 0 refuted. 32 times theorem prover too weak. 44 trivial. 18 not checked. [2024-09-12 16:05:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:05:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891323810] [2024-09-12 16:05:05,443 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 16:05:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347621596] [2024-09-12 16:05:05,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347621596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:05:05,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 16:05:05,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 21 [2024-09-12 16:05:05,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99508540] [2024-09-12 16:05:05,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 16:05:05,444 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:05:05,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:05:05,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:05:05,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=296, Unknown=12, NotChecked=36, Total=420 [2024-09-12 16:05:05,445 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 21 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 14 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 12 states have call predecessors, (15), 12 states have call successors, (15) [2024-09-12 16:05:09,468 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:05:13,504 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:05:17,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:05:36,229 WARN L293 SmtUtils]: Spent 16.25s on a formula simplification that was a NOOP. DAG size: 42 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:05:40,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:02,826 WARN L293 SmtUtils]: Spent 13.34s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 16:06:07,146 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.32s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:11,154 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:15,170 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:19,192 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:23,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 16:06:27,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers []