/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 08:31:22,433 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 08:31:22,497 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 08:31:22,503 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 08:31:22,503 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 08:31:22,530 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 08:31:22,530 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 08:31:22,530 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 08:31:22,531 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 08:31:22,534 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 08:31:22,534 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 08:31:22,535 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 08:31:22,535 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 08:31:22,536 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 08:31:22,536 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 08:31:22,536 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 08:31:22,536 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 08:31:22,536 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 08:31:22,537 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 08:31:22,537 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 08:31:22,538 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 08:31:22,538 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 08:31:22,538 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 08:31:22,538 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 08:31:22,538 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 08:31:22,539 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 08:31:22,539 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 08:31:22,539 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 08:31:22,539 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 08:31:22,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 08:31:22,540 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 08:31:22,540 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 08:31:22,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:31:22,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 08:31:22,541 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 08:31:22,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 08:31:22,542 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/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 08:31:22,724 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 08:31:22,738 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 08:31:22,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 08:31:22,740 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 08:31:22,740 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 08:31:22,741 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2023-12-21 08:31:23,713 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 08:31:23,875 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 08:31:23,876 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c [2023-12-21 08:31:23,883 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3eeb094/ea93751e08dc43e6944b03cc215a36c4/FLAGe3cc5757e [2023-12-21 08:31:23,893 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3eeb094/ea93751e08dc43e6944b03cc215a36c4 [2023-12-21 08:31:23,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 08:31:23,896 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 08:31:23,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 08:31:23,897 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 08:31:23,899 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 08:31:23,900 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:31:23" (1/1) ... [2023-12-21 08:31:23,901 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2597bdb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:23, skipping insertion in model container [2023-12-21 08:31:23,901 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:31:23" (1/1) ... [2023-12-21 08:31:23,913 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 08:31:23,997 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2023-12-21 08:31:24,006 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:31:24,012 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 08:31:24,020 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_unwindbound2.c[520,533] [2023-12-21 08:31:24,033 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:31:24,043 INFO L206 MainTranslator]: Completed translation [2023-12-21 08:31:24,043 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24 WrapperNode [2023-12-21 08:31:24,044 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 08:31:24,045 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 08:31:24,045 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 08:31:24,045 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 08:31:24,049 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,056 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,072 INFO L138 Inliner]: procedures = 14, calls = 13, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 42 [2023-12-21 08:31:24,073 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 08:31:24,073 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 08:31:24,073 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 08:31:24,073 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 08:31:24,080 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,080 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,086 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,099 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]. [2023-12-21 08:31:24,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,106 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,108 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,111 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,112 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,114 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 08:31:24,115 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 08:31:24,115 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 08:31:24,115 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 08:31:24,115 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (1/1) ... [2023-12-21 08:31:24,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:31:24,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:31:24,136 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 08:31:24,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 08:31:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 08:31:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 08:31:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 08:31:24,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 08:31:24,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 08:31:24,163 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 08:31:24,201 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 08:31:24,203 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 08:31:24,338 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 08:31:24,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 08:31:24,359 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 08:31:24,359 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:31:24 BoogieIcfgContainer [2023-12-21 08:31:24,359 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 08:31:24,361 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 08:31:24,361 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 08:31:24,363 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 08:31:24,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:31:23" (1/3) ... [2023-12-21 08:31:24,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ce495e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:31:24, skipping insertion in model container [2023-12-21 08:31:24,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:31:24" (2/3) ... [2023-12-21 08:31:24,363 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ce495e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:31:24, skipping insertion in model container [2023-12-21 08:31:24,363 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:31:24" (3/3) ... [2023-12-21 08:31:24,376 INFO L112 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_unwindbound2.c [2023-12-21 08:31:24,409 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 08:31:24,409 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 08:31:24,449 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 08:31:24,454 INFO L357 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, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, 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;@5d539479, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 08:31:24,454 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 08:31:24,457 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 08:31:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 08:31:24,463 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:24,463 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 08:31:24,464 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:24,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1811081999, now seen corresponding path program 1 times [2023-12-21 08:31:24,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:24,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260848053] [2023-12-21 08:31:24,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:24,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:24,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:31:24,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:24,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260848053] [2023-12-21 08:31:24,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260848053] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:31:24,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:31:24,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 08:31:24,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517727055] [2023-12-21 08:31:24,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:31:24,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 08:31:24,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:24,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 08:31:24,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:31:24,625 INFO L87 Difference]: Start difference. First operand has 18 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:24,647 INFO L93 Difference]: Finished difference Result 35 states and 57 transitions. [2023-12-21 08:31:24,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 08:31:24,649 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-21 08:31:24,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:24,653 INFO L225 Difference]: With dead ends: 35 [2023-12-21 08:31:24,653 INFO L226 Difference]: Without dead ends: 16 [2023-12-21 08:31:24,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:31:24,659 INFO L413 NwaCegarLoop]: 22 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, 22 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 [2023-12-21 08:31:24,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:31:24,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-12-21 08:31:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-12-21 08:31:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:31:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2023-12-21 08:31:24,681 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 6 [2023-12-21 08:31:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:24,681 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2023-12-21 08:31:24,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2023-12-21 08:31:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 08:31:24,682 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:24,682 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:31:24,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 08:31:24,682 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:24,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:24,683 INFO L85 PathProgramCache]: Analyzing trace with hash -772994646, now seen corresponding path program 1 times [2023-12-21 08:31:24,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:24,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376999109] [2023-12-21 08:31:24,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:24,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:31:24,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:24,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376999109] [2023-12-21 08:31:24,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376999109] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:31:24,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:31:24,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 08:31:24,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925011492] [2023-12-21 08:31:24,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:31:24,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 08:31:24,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:24,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 08:31:24,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 08:31:24,748 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:24,767 INFO L93 Difference]: Finished difference Result 27 states and 35 transitions. [2023-12-21 08:31:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 08:31:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 08:31:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:24,769 INFO L225 Difference]: With dead ends: 27 [2023-12-21 08:31:24,769 INFO L226 Difference]: Without dead ends: 18 [2023-12-21 08:31:24,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 08:31:24,771 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:31:24,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:31:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-21 08:31:24,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2023-12-21 08:31:24,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:31:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2023-12-21 08:31:24,775 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 7 [2023-12-21 08:31:24,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:24,775 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2023-12-21 08:31:24,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:24,775 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2023-12-21 08:31:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 08:31:24,775 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:24,776 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:31:24,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 08:31:24,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:24,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:24,776 INFO L85 PathProgramCache]: Analyzing trace with hash -771326350, now seen corresponding path program 1 times [2023-12-21 08:31:24,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:24,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476405558] [2023-12-21 08:31:24,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:24,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:24,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:31:24,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:24,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476405558] [2023-12-21 08:31:24,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476405558] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:31:24,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:31:24,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 08:31:24,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333012820] [2023-12-21 08:31:24,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:31:24,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 08:31:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 08:31:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 08:31:24,937 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:25,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:25,023 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-12-21 08:31:25,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 08:31:25,024 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 08:31:25,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:25,024 INFO L225 Difference]: With dead ends: 24 [2023-12-21 08:31:25,024 INFO L226 Difference]: Without dead ends: 22 [2023-12-21 08:31:25,025 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 08:31:25,026 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:31:25,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:31:25,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-21 08:31:25,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-21 08:31:25,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 14 states have internal predecessors, (16), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:31:25,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-12-21 08:31:25,034 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 7 [2023-12-21 08:31:25,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:25,034 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-12-21 08:31:25,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-12-21 08:31:25,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-21 08:31:25,035 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:25,035 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:31:25,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-21 08:31:25,036 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:25,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:25,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1515882446, now seen corresponding path program 1 times [2023-12-21 08:31:25,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:25,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506207767] [2023-12-21 08:31:25,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:25,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:25,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:31:25,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055572187] [2023-12-21 08:31:25,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:25,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:25,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:31:25,047 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 08:31:25,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 08:31:25,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:25,090 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 08:31:25,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:31:25,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:31:25,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:31:25,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:31:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506207767] [2023-12-21 08:31:25,277 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:31:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055572187] [2023-12-21 08:31:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055572187] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:31:25,277 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:31:25,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 08:31:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194375770] [2023-12-21 08:31:25,278 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:31:25,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 08:31:25,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:25,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 08:31:25,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 08:31:25,280 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:31:25,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:25,370 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2023-12-21 08:31:25,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 08:31:25,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 12 [2023-12-21 08:31:25,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:25,373 INFO L225 Difference]: With dead ends: 43 [2023-12-21 08:31:25,373 INFO L226 Difference]: Without dead ends: 38 [2023-12-21 08:31:25,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 08:31:25,374 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 23 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:31:25,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 61 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 08:31:25,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-21 08:31:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2023-12-21 08:31:25,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 08:31:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2023-12-21 08:31:25,383 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 12 [2023-12-21 08:31:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:25,383 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2023-12-21 08:31:25,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.6) internal successors, (16), 8 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:31:25,384 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2023-12-21 08:31:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 08:31:25,384 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:25,385 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:31:25,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 08:31:25,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:25,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:25,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:25,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1450105813, now seen corresponding path program 1 times [2023-12-21 08:31:25,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:25,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509743614] [2023-12-21 08:31:25,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:25,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:25,598 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:31:25,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1687039628] [2023-12-21 08:31:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:25,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:25,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:31:25,600 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 08:31:25,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 08:31:25,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:25,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 08:31:25,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:31:25,695 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-12-21 08:31:25,696 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:31:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2023-12-21 08:31:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:25,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509743614] [2023-12-21 08:31:25,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:31:25,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687039628] [2023-12-21 08:31:25,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687039628] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:31:25,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:31:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2023-12-21 08:31:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353703533] [2023-12-21 08:31:25,736 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:31:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 08:31:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 08:31:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 08:31:25,738 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-21 08:31:25,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:25,772 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-12-21 08:31:25,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 08:31:25,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 35 [2023-12-21 08:31:25,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:25,775 INFO L225 Difference]: With dead ends: 57 [2023-12-21 08:31:25,775 INFO L226 Difference]: Without dead ends: 40 [2023-12-21 08:31:25,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-21 08:31:25,778 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:31:25,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 69 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:31:25,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-21 08:31:25,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-12-21 08:31:25,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 08:31:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2023-12-21 08:31:25,796 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 35 [2023-12-21 08:31:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:25,797 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2023-12-21 08:31:25,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-12-21 08:31:25,798 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2023-12-21 08:31:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-12-21 08:31:25,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:31:25,799 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-21 08:31:25,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 08:31:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:26,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:31:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:31:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -563431693, now seen corresponding path program 1 times [2023-12-21 08:31:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:31:26,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530583796] [2023-12-21 08:31:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:31:26,019 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:31:26,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512611356] [2023-12-21 08:31:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:31:26,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:26,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:31:26,040 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 08:31:26,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 08:31:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:31:26,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-21 08:31:26,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:31:26,163 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 08:31:26,164 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:31:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 08:31:26,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:31:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530583796] [2023-12-21 08:31:26,283 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:31:26,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512611356] [2023-12-21 08:31:26,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512611356] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:31:26,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:31:26,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-12-21 08:31:26,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125220777] [2023-12-21 08:31:26,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:31:26,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-21 08:31:26,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:31:26,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-21 08:31:26,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-12-21 08:31:26,285 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 08:31:26,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:31:26,379 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2023-12-21 08:31:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 08:31:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) Word has length 35 [2023-12-21 08:31:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:31:26,379 INFO L225 Difference]: With dead ends: 47 [2023-12-21 08:31:26,379 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 08:31:26,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-12-21 08:31:26,381 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:31:26,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 70 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 08:31:26,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 08:31:26,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 08:31:26,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:31:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 08:31:26,384 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2023-12-21 08:31:26,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:31:26,384 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 08:31:26,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 08:31:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 08:31:26,384 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 08:31:26,386 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 08:31:26,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-21 08:31:26,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:31:26,593 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 08:31:26,941 INFO L899 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2023-12-21 08:31:26,941 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-21 08:31:26,942 INFO L895 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,942 INFO L895 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,942 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2023-12-21 08:31:26,942 INFO L895 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,942 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-21 08:31:26,942 INFO L895 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,942 INFO L899 garLoopResultBuilder]: For program point L30-1(lines 30 42) no Hoare annotation was computed. [2023-12-21 08:31:26,944 INFO L895 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,944 INFO L895 garLoopResultBuilder]: At program point L30-4(lines 30 42) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,944 INFO L895 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (and (= |ULTIMATE.start_main_~t~0#1| (+ 1 (* 2 |ULTIMATE.start_main_~a~0#1|))) (= (* |ULTIMATE.start_main_~s~0#1| 4) (+ (* |ULTIMATE.start_main_~t~0#1| |ULTIMATE.start_main_~t~0#1|) (* 2 |ULTIMATE.start_main_~t~0#1|) 1))) [2023-12-21 08:31:26,944 INFO L899 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2023-12-21 08:31:26,944 INFO L899 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2023-12-21 08:31:26,944 INFO L899 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2023-12-21 08:31:26,944 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2023-12-21 08:31:26,944 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 11 17) the Hoare annotation is: true [2023-12-21 08:31:26,944 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2023-12-21 08:31:26,946 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1] [2023-12-21 08:31:26,948 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 08:31:26,954 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 08:31:26 BoogieIcfgContainer [2023-12-21 08:31:26,954 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 08:31:26,955 INFO L158 Benchmark]: Toolchain (without parser) took 3059.05ms. Allocated memory was 197.1MB in the beginning and 359.7MB in the end (delta: 162.5MB). Free memory was 144.5MB in the beginning and 204.6MB in the end (delta: -60.1MB). Peak memory consumption was 103.4MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,955 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory was 149.4MB in the beginning and 149.3MB in the end (delta: 122.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 08:31:26,955 INFO L158 Benchmark]: CACSL2BoogieTranslator took 147.68ms. Allocated memory is still 197.1MB. Free memory was 144.0MB in the beginning and 133.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,955 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.90ms. Allocated memory is still 197.1MB. Free memory was 133.0MB in the beginning and 131.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,955 INFO L158 Benchmark]: Boogie Preprocessor took 40.84ms. Allocated memory is still 197.1MB. Free memory was 131.8MB in the beginning and 129.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,956 INFO L158 Benchmark]: RCFGBuilder took 244.46ms. Allocated memory is still 197.1MB. Free memory was 129.8MB in the beginning and 119.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,956 INFO L158 Benchmark]: TraceAbstraction took 2593.77ms. Allocated memory was 197.1MB in the beginning and 359.7MB in the end (delta: 162.5MB). Free memory was 118.8MB in the beginning and 204.6MB in the end (delta: -85.8MB). Peak memory consumption was 78.3MB. Max. memory is 8.0GB. [2023-12-21 08:31:26,957 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 197.1MB. Free memory was 149.4MB in the beginning and 149.3MB in the end (delta: 122.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 147.68ms. Allocated memory is still 197.1MB. Free memory was 144.0MB in the beginning and 133.0MB in the end (delta: 11.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.90ms. Allocated memory is still 197.1MB. Free memory was 133.0MB in the beginning and 131.8MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.84ms. Allocated memory is still 197.1MB. Free memory was 131.8MB in the beginning and 129.8MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 244.46ms. Allocated memory is still 197.1MB. Free memory was 129.8MB in the beginning and 119.3MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 2593.77ms. Allocated memory was 197.1MB in the beginning and 359.7MB in the end (delta: 162.5MB). Free memory was 118.8MB in the beginning and 204.6MB in the end (delta: -85.8MB). Peak memory consumption was 78.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 18 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 2.5s, OverallIterations: 6, TraceHistogramMax: 6, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 71 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 48 mSDsluCounter, 328 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 224 mSDsCounter, 40 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 223 IncrementalHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 40 mSolverCounterUnsat, 104 mSDtfsCounter, 223 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 173 GetRequests, 135 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, InterpolantAutomatonStates: 36, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 37 PreInvPairs, 58 NumberOfFragments, 141 HoareAnnotationTreeSize, 37 FormulaSimplifications, 333 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FormulaSimplificationsInter, 265 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 102 NumberOfCodeBlocks, 102 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 640 SizeOfPredicates, 7 NumberOfNonLiveVariables, 258 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 181/218 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: ((t == (1 + (2 * a))) && ((s * 4) == (((t * t) + (2 * t)) + 1))) RESULT: Ultimate proved your program to be correct! [2023-12-21 08:31:26,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...