./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound5.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 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --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/dijkstra-u_valuebound5.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 b5a1422c7f1124202863875c2296d538cebfb680907647840c96a830e98d336c --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --cacsl2boogietranslator.check.absence.of.signed.integer.overflows true --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 18:42:47,557 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 18:42:47,632 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 18:42:47,639 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 18:42:47,640 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 18:42:47,667 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 18:42:47,668 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 18:42:47,668 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 18:42:47,669 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 18:42:47,670 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 18:42:47,671 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 18:42:47,672 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 18:42:47,672 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 18:42:47,673 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 18:42:47,673 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 18:42:47,675 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 18:42:47,676 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 18:42:47,676 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 18:42:47,676 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 18:42:47,677 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 18:42:47,677 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 18:42:47,678 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 18:42:47,678 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 18:42:47,678 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 18:42:47,678 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 18:42:47,679 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 18:42:47,679 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 18:42:47,679 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 18:42:47,679 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 18:42:47,680 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 18:42:47,680 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 18:42:47,680 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 18:42:47,680 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:42:47,680 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 18:42:47,681 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 18:42:47,681 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 18:42:47,687 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 18:42:47,687 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 18:42:47,688 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 18:42:47,688 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 18:42:47,688 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 18:42:47,688 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 18:42:47,689 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b5a1422c7f1124202863875c2296d538cebfb680907647840c96a830e98d336c Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check absence of signed integer overflows -> true [2024-09-12 18:42:47,999 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 18:42:48,017 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 18:42:48,020 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 18:42:48,021 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 18:42:48,022 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 18:42:48,023 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound5.c [2024-09-12 18:42:49,546 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 18:42:49,745 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 18:42:49,745 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/dijkstra-u_valuebound5.c [2024-09-12 18:42:49,756 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/26591296a/281795eb362044099d51bebf9a7f6058/FLAG7088fc666 [2024-09-12 18:42:50,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/26591296a/281795eb362044099d51bebf9a7f6058 [2024-09-12 18:42:50,136 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 18:42:50,138 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 18:42:50,139 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 18:42:50,139 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 18:42:50,146 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 18:42:50,147 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,148 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b8bc93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50, skipping insertion in model container [2024-09-12 18:42:50,148 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,166 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 18:42:50,326 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/dijkstra-u_valuebound5.c[525,538] [2024-09-12 18:42:50,378 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:42:50,388 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 18:42:50,402 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/dijkstra-u_valuebound5.c[525,538] [2024-09-12 18:42:50,420 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 18:42:50,442 INFO L204 MainTranslator]: Completed translation [2024-09-12 18:42:50,443 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50 WrapperNode [2024-09-12 18:42:50,443 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 18:42:50,444 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 18:42:50,445 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 18:42:50,445 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 18:42:50,451 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,460 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,467 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 18:42:50,468 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 18:42:50,469 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 18:42:50,469 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 18:42:50,469 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 18:42:50,479 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,479 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,481 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,504 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 18:42:50,504 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,505 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,512 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,517 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,521 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,522 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 18:42:50,526 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 18:42:50,526 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 18:42:50,526 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 18:42:50,527 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (1/1) ... [2024-09-12 18:42:50,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 18:42:50,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:42:50,564 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 18:42:50,571 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 18:42:50,618 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 18:42:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-12 18:42:50,619 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-12 18:42:50,619 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 18:42:50,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 18:42:50,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 18:42:50,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 18:42:50,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 18:42:50,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 18:42:50,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 18:42:50,621 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 18:42:50,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 18:42:50,686 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 18:42:50,688 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 18:42:50,917 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-12 18:42:50,918 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 18:42:50,944 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 18:42:50,944 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-12 18:42:50,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:42:50 BoogieIcfgContainer [2024-09-12 18:42:50,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 18:42:50,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 18:42:50,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 18:42:50,956 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 18:42:50,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 06:42:50" (1/3) ... [2024-09-12 18:42:50,957 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6095c638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:42:50, skipping insertion in model container [2024-09-12 18:42:50,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 06:42:50" (2/3) ... [2024-09-12 18:42:50,958 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6095c638 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 06:42:50, skipping insertion in model container [2024-09-12 18:42:50,958 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 06:42:50" (3/3) ... [2024-09-12 18:42:50,960 INFO L112 eAbstractionObserver]: Analyzing ICFG dijkstra-u_valuebound5.c [2024-09-12 18:42:50,976 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 18:42:50,977 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 18:42:51,037 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 18:42:51,045 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;@49b157b1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 18:42:51,046 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 18:42:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-12 18:42:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-12 18:42:51,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:42:51,057 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 18:42:51,058 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:42:51,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:42:51,065 INFO L85 PathProgramCache]: Analyzing trace with hash 570623365, now seen corresponding path program 1 times [2024-09-12 18:42:51,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:42:51,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118131879] [2024-09-12 18:42:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:42:51,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:42:51,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:42:51,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:42:51,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:42:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,256 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 18:42:51,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:42:51,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118131879] [2024-09-12 18:42:51,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118131879] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:42:51,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:42:51,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-12 18:42:51,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227624376] [2024-09-12 18:42:51,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:42:51,263 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-12 18:42:51,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:42:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-12 18:42:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 18:42:51,298 INFO L87 Difference]: Start difference. First operand has 36 states, 17 states have (on average 1.588235294117647) internal successors, (27), 18 states have internal predecessors, (27), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 18:42:51,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:42:51,338 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2024-09-12 18:42:51,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-12 18:42:51,341 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 18:42:51,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:42:51,348 INFO L225 Difference]: With dead ends: 66 [2024-09-12 18:42:51,348 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 18:42:51,352 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-12 18:42:51,357 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:42:51,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 18:42:51,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 18:42:51,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-12 18:42:51,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-12 18:42:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2024-09-12 18:42:51,399 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 22 [2024-09-12 18:42:51,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:42:51,400 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2024-09-12 18:42:51,400 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 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 18:42:51,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:42:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2024-09-12 18:42:51,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-12 18:42:51,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:42:51,405 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 18:42:51,406 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 18:42:51,406 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:42:51,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:42:51,407 INFO L85 PathProgramCache]: Analyzing trace with hash -2095105318, now seen corresponding path program 1 times [2024-09-12 18:42:51,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:42:51,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931776460] [2024-09-12 18:42:51,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:42:51,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:42:51,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:42:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:42:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:42:51,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:51,902 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 18:42:51,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:42:51,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931776460] [2024-09-12 18:42:51,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931776460] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:42:51,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:42:51,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-12 18:42:51,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922749901] [2024-09-12 18:42:51,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:42:51,905 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-12 18:42:51,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:42:51,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-12 18:42:51,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-12 18:42:51,906 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 18:42:53,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:42:57,296 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 18:42:57,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:42:57,320 INFO L93 Difference]: Finished difference Result 64 states and 92 transitions. [2024-09-12 18:42:57,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 18:42:57,323 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 23 [2024-09-12 18:42:57,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:42:57,324 INFO L225 Difference]: With dead ends: 64 [2024-09-12 18:42:57,324 INFO L226 Difference]: Without dead ends: 46 [2024-09-12 18:42:57,325 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-12 18:42:57,326 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 13 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2024-09-12 18:42:57,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 184 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 53 Invalid, 1 Unknown, 0 Unchecked, 5.4s Time] [2024-09-12 18:42:57,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-12 18:42:57,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2024-09-12 18:42:57,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-12 18:42:57,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2024-09-12 18:42:57,352 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 23 [2024-09-12 18:42:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:42:57,354 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2024-09-12 18:42:57,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 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 18:42:57,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:42:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2024-09-12 18:42:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-12 18:42:57,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:42:57,357 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] [2024-09-12 18:42:57,357 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 18:42:57,357 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:42:57,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:42:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1429886677, now seen corresponding path program 1 times [2024-09-12 18:42:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:42:57,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139560247] [2024-09-12 18:42:57,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:42:57,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:42:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:57,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:42:57,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:57,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:42:57,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:57,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:42:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:42:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:42:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139560247] [2024-09-12 18:42:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139560247] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:42:57,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127671840] [2024-09-12 18:42:57,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:42:57,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:42:57,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:42:57,836 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 18:42:57,838 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 18:42:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:42:57,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 18:42:57,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:42:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:42:58,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:42:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:42:58,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127671840] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:42:58,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:42:58,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-09-12 18:42:58,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64363145] [2024-09-12 18:42:58,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:42:58,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 18:42:58,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:42:58,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 18:42:58,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:42:58,321 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:43:03,462 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:04,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:43:04,062 INFO L93 Difference]: Finished difference Result 115 states and 181 transitions. [2024-09-12 18:43:04,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-12 18:43:04,062 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 25 [2024-09-12 18:43:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:43:04,065 INFO L225 Difference]: With dead ends: 115 [2024-09-12 18:43:04,065 INFO L226 Difference]: Without dead ends: 97 [2024-09-12 18:43:04,066 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2024-09-12 18:43:04,067 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 28 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 113 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2024-09-12 18:43:04,067 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 304 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 236 Invalid, 1 Unknown, 0 Unchecked, 5.6s Time] [2024-09-12 18:43:04,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-12 18:43:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2024-09-12 18:43:04,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 27 states have call successors, (27), 6 states have call predecessors, (27), 5 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-12 18:43:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 91 transitions. [2024-09-12 18:43:04,100 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 91 transitions. Word has length 25 [2024-09-12 18:43:04,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:43:04,101 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 91 transitions. [2024-09-12 18:43:04,102 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 18:43:04,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:04,102 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 91 transitions. [2024-09-12 18:43:04,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 18:43:04,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:43:04,105 INFO L216 NwaCegarLoop]: trace histogram [3, 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] [2024-09-12 18:43:04,123 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-12 18:43:04,308 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 [2024-09-12 18:43:04,309 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:43:04,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:04,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1189191834, now seen corresponding path program 1 times [2024-09-12 18:43:04,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:43:04,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734366338] [2024-09-12 18:43:04,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:04,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:43:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:43:04,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098143742] [2024-09-12 18:43:04,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:04,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:04,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:43:04,353 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 18:43:04,363 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 18:43:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:04,406 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 18:43:04,408 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:43:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 18:43:04,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-12 18:43:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:43:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734366338] [2024-09-12 18:43:04,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:43:04,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098143742] [2024-09-12 18:43:04,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098143742] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 18:43:04,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 18:43:04,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 18:43:04,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890417095] [2024-09-12 18:43:04,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 18:43:04,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 18:43:04,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:43:04,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 18:43:04,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 18:43:04,470 INFO L87 Difference]: Start difference. First operand 65 states and 91 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 18:43:08,668 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 18:43:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:43:08,669 INFO L93 Difference]: Finished difference Result 90 states and 127 transitions. [2024-09-12 18:43:08,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 18:43:08,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2024-09-12 18:43:08,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:43:08,679 INFO L225 Difference]: With dead ends: 90 [2024-09-12 18:43:08,679 INFO L226 Difference]: Without dead ends: 87 [2024-09-12 18:43:08,679 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 18:43:08,680 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 5 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2024-09-12 18:43:08,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2024-09-12 18:43:08,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-12 18:43:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2024-09-12 18:43:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 40 states have (on average 1.2) internal successors, (48), 42 states have internal predecessors, (48), 39 states have call successors, (39), 8 states have call predecessors, (39), 7 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-12 18:43:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 123 transitions. [2024-09-12 18:43:08,702 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 123 transitions. Word has length 33 [2024-09-12 18:43:08,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:43:08,703 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 123 transitions. [2024-09-12 18:43:08,703 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-12 18:43:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 123 transitions. [2024-09-12 18:43:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 18:43:08,704 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:43:08,705 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:43:08,721 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 18:43:08,908 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 18:43:08,909 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:43:08,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:43:08,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1682280212, now seen corresponding path program 1 times [2024-09-12 18:43:08,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:43:08,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583195574] [2024-09-12 18:43:08,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:08,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:43:08,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:43:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362570085] [2024-09-12 18:43:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:43:08,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:43:08,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:43:08,928 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 18:43:08,931 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 18:43:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:43:09,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 18:43:09,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:43:09,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:43:09,159 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:43:10,427 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 18:43:10,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:43:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583195574] [2024-09-12 18:43:10,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:43:10,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362570085] [2024-09-12 18:43:10,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362570085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:43:10,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 18:43:10,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-12 18:43:10,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451575323] [2024-09-12 18:43:10,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 18:43:10,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-12 18:43:10,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:43:10,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-12 18:43:10,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-09-12 18:43:10,430 INFO L87 Difference]: Start difference. First operand 87 states and 123 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 18:43:26,282 WARN L293 SmtUtils]: Spent 8.06s on a formula simplification. DAG size of input: 29 DAG size of output: 21 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:43:30,301 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 18:43:31,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:43:36,465 WARN L539 Checker$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 18:43:40,569 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:44,590 WARN L539 Checker$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 18:43:48,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:43:52,876 WARN L539 Checker$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 18:43:56,966 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.69s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:00,979 WARN L539 Checker$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 18:44:04,984 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:08,994 WARN L539 Checker$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 18:44:13,004 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:17,013 WARN L539 Checker$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 18:44:21,285 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:25,290 WARN L539 Checker$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 18:44:29,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:31,277 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:35,323 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:44:39,852 WARN L539 Checker$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 18:44:39,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:44:39,870 INFO L93 Difference]: Finished difference Result 156 states and 226 transitions. [2024-09-12 18:44:39,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 18:44:39,871 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2024-09-12 18:44:39,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:44:39,872 INFO L225 Difference]: With dead ends: 156 [2024-09-12 18:44:39,872 INFO L226 Difference]: Without dead ends: 132 [2024-09-12 18:44:39,873 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=38, Invalid=93, Unknown=1, NotChecked=0, Total=132 [2024-09-12 18:44:39,874 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 55 mSolverCounterUnsat, 16 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 16 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.6s IncrementalHoareTripleChecker+Time [2024-09-12 18:44:39,875 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 297 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 199 Invalid, 16 Unknown, 0 Unchecked, 73.6s Time] [2024-09-12 18:44:39,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-12 18:44:39,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2024-09-12 18:44:39,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 58 states have (on average 1.1896551724137931) internal successors, (69), 61 states have internal predecessors, (69), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 18:44:39,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2024-09-12 18:44:39,912 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 32 [2024-09-12 18:44:39,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:44:39,912 INFO L474 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2024-09-12 18:44:39,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-12 18:44:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:44:39,913 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2024-09-12 18:44:39,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 18:44:39,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:44:39,915 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:44:39,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-12 18:44:40,119 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 18:44:40,120 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:44:40,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:44:40,120 INFO L85 PathProgramCache]: Analyzing trace with hash -7962503, now seen corresponding path program 1 times [2024-09-12 18:44:40,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:44:40,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934887747] [2024-09-12 18:44:40,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:44:40,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:44:40,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:44:40,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:44:40,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:44:40,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 18:44:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 18:44:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-12 18:44:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:44:40,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:44:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934887747] [2024-09-12 18:44:40,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934887747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:44:40,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891059596] [2024-09-12 18:44:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:44:40,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:44:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:44:40,425 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 18:44:40,426 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 18:44:40,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:40,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 18:44:40,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:44:40,614 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 18:44:40,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:44:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-12 18:44:40,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891059596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 18:44:40,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 18:44:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-12 18:44:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755707912] [2024-09-12 18:44:40,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 18:44:40,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 18:44:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:44:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 18:44:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-12 18:44:40,885 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 18:44:45,638 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:44:49,936 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:44:50,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:44:50,016 INFO L93 Difference]: Finished difference Result 177 states and 252 transitions. [2024-09-12 18:44:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 18:44:50,017 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 44 [2024-09-12 18:44:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:44:50,018 INFO L225 Difference]: With dead ends: 177 [2024-09-12 18:44:50,018 INFO L226 Difference]: Without dead ends: 135 [2024-09-12 18:44:50,019 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2024-09-12 18:44:50,020 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 84 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 180 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:44:50,020 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 245 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 165 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-09-12 18:44:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-12 18:44:50,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 123. [2024-09-12 18:44:50,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 55 states have (on average 1.1272727272727272) internal successors, (62), 59 states have internal predecessors, (62), 57 states have call successors, (57), 11 states have call predecessors, (57), 10 states have return successors, (54), 52 states have call predecessors, (54), 54 states have call successors, (54) [2024-09-12 18:44:50,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 173 transitions. [2024-09-12 18:44:50,051 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 173 transitions. Word has length 44 [2024-09-12 18:44:50,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:44:50,051 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 173 transitions. [2024-09-12 18:44:50,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 13 states have internal predecessors, (40), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2024-09-12 18:44:50,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:44:50,052 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 173 transitions. [2024-09-12 18:44:50,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 18:44:50,054 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:44:50,054 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:44:50,072 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 18:44:50,258 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 18:44:50,258 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:44:50,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:44:50,258 INFO L85 PathProgramCache]: Analyzing trace with hash -409333978, now seen corresponding path program 1 times [2024-09-12 18:44:50,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:44:50,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983107512] [2024-09-12 18:44:50,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:44:50,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:44:50,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-12 18:44:50,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057586026] [2024-09-12 18:44:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:44:50,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:44:50,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:44:50,293 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 18:44:50,297 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 18:44:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:44:50,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 18:44:50,354 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:44:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 19 proven. 13 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-12 18:44:50,507 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:45:02,693 WARN L854 $PredicateComparison]: unable to prove that (or (= (mod (+ (* 4294967295 c_main_~n~0) c_main_~r~0 (* c_main_~p~0 c_main_~p~0)) 4294967296) 0) (forall ((main_~q~0 Int)) (not (= (mod (+ (* main_~q~0 main_~q~0 4294967295 c_main_~h~0) (* 4294967292 main_~q~0 main_~q~0 c_main_~p~0) (* main_~q~0 c_main_~r~0 12 c_main_~h~0) (* main_~q~0 16 c_main_~p~0 c_main_~n~0) (* c_main_~h~0 c_main_~h~0 c_main_~h~0) (* main_~q~0 c_main_~n~0 4294967284 c_main_~h~0) (* main_~q~0 c_main_~p~0 c_main_~r~0 4294967280)) 4294967296) 0)))) is different from false [2024-09-12 18:45:02,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:45:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983107512] [2024-09-12 18:45:02,698 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-12 18:45:02,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057586026] [2024-09-12 18:45:02,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057586026] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:45:02,698 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-12 18:45:02,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2024-09-12 18:45:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003524439] [2024-09-12 18:45:02,699 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-12 18:45:02,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 18:45:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:45:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 18:45:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=54, Unknown=1, NotChecked=14, Total=90 [2024-09-12 18:45:02,701 INFO L87 Difference]: Start difference. First operand 123 states and 173 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 18:45:07,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:11,568 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:11,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:45:11,788 INFO L93 Difference]: Finished difference Result 133 states and 184 transitions. [2024-09-12 18:45:11,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 18:45:11,788 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2024-09-12 18:45:11,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:45:11,792 INFO L225 Difference]: With dead ends: 133 [2024-09-12 18:45:11,792 INFO L226 Difference]: Without dead ends: 111 [2024-09-12 18:45:11,793 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=27, Invalid=66, Unknown=1, NotChecked=16, Total=110 [2024-09-12 18:45:11,805 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 7 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 13 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2024-09-12 18:45:11,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 157 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 152 Invalid, 2 Unknown, 0 Unchecked, 9.0s Time] [2024-09-12 18:45:11,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-12 18:45:11,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2024-09-12 18:45:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 54 states have internal predecessors, (57), 50 states have call successors, (50), 10 states have call predecessors, (50), 9 states have return successors, (47), 46 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-12 18:45:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 154 transitions. [2024-09-12 18:45:11,843 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 154 transitions. Word has length 59 [2024-09-12 18:45:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:45:11,843 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 154 transitions. [2024-09-12 18:45:11,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-12 18:45:11,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:45:11,844 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 154 transitions. [2024-09-12 18:45:11,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 18:45:11,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:45:11,850 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:45:11,869 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-12 18:45:12,051 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-12 18:45:12,051 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:45:12,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:45:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash 382001091, now seen corresponding path program 1 times [2024-09-12 18:45:12,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:45:12,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694911524] [2024-09-12 18:45:12,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:45:12,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:45:12,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:45:12,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:45:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:45:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 18:45:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 18:45:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 18:45:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 18:45:12,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-12 18:45:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-12 18:45:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 18:45:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:45:12,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694911524] [2024-09-12 18:45:12,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694911524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:45:12,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177544582] [2024-09-12 18:45:12,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:45:12,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:45:12,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:45:12,913 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) [2024-09-12 18:45:12,914 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 18:45:13,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:45:13,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 18:45:13,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:45:13,721 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-12 18:45:13,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 18:45:39,873 WARN L293 SmtUtils]: Spent 12.14s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-12 18:45:39,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177544582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:45:39,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-12 18:45:39,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 19 [2024-09-12 18:45:39,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473300258] [2024-09-12 18:45:39,875 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-12 18:45:39,875 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-12 18:45:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 18:45:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-12 18:45:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=391, Unknown=1, NotChecked=0, Total=462 [2024-09-12 18:45:39,877 INFO L87 Difference]: Start difference. First operand 111 states and 154 transitions. Second operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 18:45:42,002 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:46,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:50,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:54,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:45:58,631 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:02,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:06,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:10,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:14,752 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:18,766 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:22,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:26,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-12 18:46:29,120 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:33,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:37,134 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-12 18:46:37,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 18:46:37,284 INFO L93 Difference]: Finished difference Result 143 states and 188 transitions. [2024-09-12 18:46:37,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 18:46:37,285 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 58 [2024-09-12 18:46:37,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 18:46:37,287 INFO L225 Difference]: With dead ends: 143 [2024-09-12 18:46:37,287 INFO L226 Difference]: Without dead ends: 124 [2024-09-12 18:46:37,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=104, Invalid=597, Unknown=1, NotChecked=0, Total=702 [2024-09-12 18:46:37,288 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 17 mSolverCounterUnsat, 13 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 56.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 13 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 57.1s IncrementalHoareTripleChecker+Time [2024-09-12 18:46:37,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 398 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 375 Invalid, 13 Unknown, 0 Unchecked, 57.1s Time] [2024-09-12 18:46:37,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-12 18:46:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2024-09-12 18:46:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 63 states have internal predecessors, (65), 45 states have call successors, (45), 13 states have call predecessors, (45), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2024-09-12 18:46:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 152 transitions. [2024-09-12 18:46:37,314 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 152 transitions. Word has length 58 [2024-09-12 18:46:37,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 18:46:37,314 INFO L474 AbstractCegarLoop]: Abstraction has 118 states and 152 transitions. [2024-09-12 18:46:37,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2024-09-12 18:46:37,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:46:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 152 transitions. [2024-09-12 18:46:37,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 18:46:37,316 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 18:46:37,316 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 18:46:37,333 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 18:46:37,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:46:37,521 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 18:46:37,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 18:46:37,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1682429464, now seen corresponding path program 2 times [2024-09-12 18:46:37,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 18:46:37,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228113191] [2024-09-12 18:46:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 18:46:37,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 18:46:37,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 18:46:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 18:46:38,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 18:46:38,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 18:46:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 18:46:38,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-12 18:46:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 18:46:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-12 18:46:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-12 18:46:38,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 18:46:38,559 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 18:46:38,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 18:46:38,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228113191] [2024-09-12 18:46:38,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228113191] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 18:46:38,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105740586] [2024-09-12 18:46:38,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 18:46:38,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 18:46:38,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 18:46:38,562 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) [2024-09-12 18:46:38,563 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 18:46:38,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 18:46:38,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 18:46:38,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 18:46:38,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 18:46:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 23 proven. 15 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 18:46:39,469 INFO L327 TraceCheckSpWp]: Computing backward predicates...