/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/hard2_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:12:43,540 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:12:43,602 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 05:12:43,605 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:12:43,605 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:12:43,625 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:12:43,625 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:12:43,626 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:12:43,626 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:12:43,629 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:12:43,629 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:12:43,629 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:12:43,630 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:12:43,631 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:12:43,631 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:12:43,631 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:12:43,631 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:12:43,631 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:12:43,631 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:12:43,632 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:12:43,632 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:12:43,633 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:12:43,634 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:12:43,634 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:12:43,635 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:12:43,635 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:12:43,636 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:12:43,636 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:12:43,636 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:12:43,636 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:12:43,636 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:12:43,636 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:12:43,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:12:43,819 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:12:43,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:12:43,821 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:12:43,823 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:12:43,824 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2023-12-16 05:12:44,781 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:12:44,929 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:12:44,929 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound5.c [2023-12-16 05:12:44,935 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31a1e11d/312048b63d1b4dcc9a548d69629b4ccb/FLAG9ba6f2548 [2023-12-16 05:12:44,944 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a31a1e11d/312048b63d1b4dcc9a548d69629b4ccb [2023-12-16 05:12:44,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:12:44,947 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:12:44,950 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:12:44,951 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:12:44,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:12:44,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:12:44" (1/1) ... [2023-12-16 05:12:44,955 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19c9afe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:44, skipping insertion in model container [2023-12-16 05:12:44,955 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:12:44" (1/1) ... [2023-12-16 05:12:44,970 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:12:45,067 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/hard2_valuebound5.c[526,539] [2023-12-16 05:12:45,080 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:12:45,087 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:12:45,098 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/hard2_valuebound5.c[526,539] [2023-12-16 05:12:45,101 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:12:45,110 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:12:45,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45 WrapperNode [2023-12-16 05:12:45,111 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:12:45,111 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:12:45,111 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:12:45,111 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:12:45,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,119 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,130 INFO L138 Inliner]: procedures = 14, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 64 [2023-12-16 05:12:45,130 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:12:45,131 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:12:45,131 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:12:45,131 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:12:45,138 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,138 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,139 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,162 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2023-12-16 05:12:45,163 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,163 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,168 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:12:45,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:12:45,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:12:45,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:12:45,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (1/1) ... [2023-12-16 05:12:45,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:12:45,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:12:45,197 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) [2023-12-16 05:12:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:12:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:12:45,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 05:12:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:12:45,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:12:45,221 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 05:12:45,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 05:12:45,202 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 [2023-12-16 05:12:45,270 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:12:45,272 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:12:45,401 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:12:45,421 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:12:45,421 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-16 05:12:45,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:12:45 BoogieIcfgContainer [2023-12-16 05:12:45,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:12:45,423 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:12:45,423 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:12:45,425 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:12:45,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:12:44" (1/3) ... [2023-12-16 05:12:45,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36463417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:12:45, skipping insertion in model container [2023-12-16 05:12:45,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:12:45" (2/3) ... [2023-12-16 05:12:45,426 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36463417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:12:45, skipping insertion in model container [2023-12-16 05:12:45,426 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:12:45" (3/3) ... [2023-12-16 05:12:45,427 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_valuebound5.c [2023-12-16 05:12:45,438 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:12:45,438 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:12:45,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:12:45,471 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;@661a70ff, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:12:45,471 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:12:45,473 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-16 05:12:45,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 05:12:45,478 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:45,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:45,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:45,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:45,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1830609328, now seen corresponding path program 1 times [2023-12-16 05:12:45,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:45,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523695955] [2023-12-16 05:12:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:45,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:45,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:12:45,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:45,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523695955] [2023-12-16 05:12:45,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523695955] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:12:45,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:12:45,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-16 05:12:45,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617154827] [2023-12-16 05:12:45,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:12:45,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-16 05:12:45,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:45,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-16 05:12:45,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-16 05:12:45,631 INFO L87 Difference]: Start difference. First operand has 23 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-12-16 05:12:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:12:45,667 INFO L93 Difference]: Finished difference Result 44 states and 78 transitions. [2023-12-16 05:12:45,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-16 05:12:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 8 [2023-12-16 05:12:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:12:45,673 INFO L225 Difference]: With dead ends: 44 [2023-12-16 05:12:45,673 INFO L226 Difference]: Without dead ends: 21 [2023-12-16 05:12:45,675 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 [2023-12-16 05:12:45,679 INFO L413 NwaCegarLoop]: 29 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, 29 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 [2023-12-16 05:12:45,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:12:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-16 05:12:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-16 05:12:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 05:12:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 29 transitions. [2023-12-16 05:12:45,711 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 29 transitions. Word has length 8 [2023-12-16 05:12:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:12:45,711 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 29 transitions. [2023-12-16 05:12:45,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-12-16 05:12:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 29 transitions. [2023-12-16 05:12:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 05:12:45,714 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:45,714 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:45,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-16 05:12:45,714 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:45,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:45,715 INFO L85 PathProgramCache]: Analyzing trace with hash -55601966, now seen corresponding path program 1 times [2023-12-16 05:12:45,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:45,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571452620] [2023-12-16 05:12:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:45,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:45,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:12:45,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:45,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571452620] [2023-12-16 05:12:45,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571452620] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:12:45,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:12:45,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:12:45,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076873728] [2023-12-16 05:12:45,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:12:45,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:12:45,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:45,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:12:45,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:12:45,899 INFO L87 Difference]: Start difference. First operand 21 states and 29 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-12-16 05:12:45,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:12:45,944 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2023-12-16 05:12:45,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 05:12:45,946 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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 8 [2023-12-16 05:12:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:12:45,946 INFO L225 Difference]: With dead ends: 34 [2023-12-16 05:12:45,946 INFO L226 Difference]: Without dead ends: 32 [2023-12-16 05:12:45,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:12:45,947 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:12:45,948 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 82 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:12:45,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-12-16 05:12:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2023-12-16 05:12:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 05:12:45,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-12-16 05:12:45,954 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 8 [2023-12-16 05:12:45,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:12:45,954 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-12-16 05:12:45,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 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) [2023-12-16 05:12:45,955 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-12-16 05:12:45,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-16 05:12:45,955 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:45,955 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:45,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-16 05:12:45,955 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:45,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:45,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1587104181, now seen corresponding path program 1 times [2023-12-16 05:12:45,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:45,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455946009] [2023-12-16 05:12:45,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:45,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:46,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-12-16 05:12:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:46,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:12:46,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:46,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455946009] [2023-12-16 05:12:46,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455946009] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:12:46,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:12:46,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-16 05:12:46,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859222770] [2023-12-16 05:12:46,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:12:46,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-16 05:12:46,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:46,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-16 05:12:46,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-16 05:12:46,058 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:12:46,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:12:46,095 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2023-12-16 05:12:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 05:12:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-12-16 05:12:46,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:12:46,097 INFO L225 Difference]: With dead ends: 38 [2023-12-16 05:12:46,097 INFO L226 Difference]: Without dead ends: 36 [2023-12-16 05:12:46,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:12:46,098 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:12:46,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 78 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:12:46,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-16 05:12:46,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 29. [2023-12-16 05:12:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-16 05:12:46,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-12-16 05:12:46,104 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 13 [2023-12-16 05:12:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:12:46,104 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-12-16 05:12:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-12-16 05:12:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-12-16 05:12:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 05:12:46,105 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:46,105 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-12-16 05:12:46,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:46,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:46,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1972613170, now seen corresponding path program 1 times [2023-12-16 05:12:46,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681118349] [2023-12-16 05:12:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:46,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:12:46,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155193122] [2023-12-16 05:12:46,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:46,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:12:46,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:12:46,121 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) [2023-12-16 05:12:46,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 05:12:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:46,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-16 05:12:46,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:12:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:12:46,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:12:46,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-16 05:12:46,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:46,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681118349] [2023-12-16 05:12:46,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:12:46,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155193122] [2023-12-16 05:12:46,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155193122] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:12:46,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:12:46,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-16 05:12:46,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48799111] [2023-12-16 05:12:46,437 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:12:46,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-16 05:12:46,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-16 05:12:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-16 05:12:46,440 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:12:50,577 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 [] [2023-12-16 05:12:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:12:50,633 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-12-16 05:12:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 05:12:50,633 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2023-12-16 05:12:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:12:50,635 INFO L225 Difference]: With dead ends: 64 [2023-12-16 05:12:50,635 INFO L226 Difference]: Without dead ends: 50 [2023-12-16 05:12:50,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-16 05:12:50,636 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 18 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:12:50,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 96 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 132 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-16 05:12:50,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-16 05:12:50,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-12-16 05:12:50,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 32 states have internal predecessors, (34), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-16 05:12:50,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2023-12-16 05:12:50,645 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 18 [2023-12-16 05:12:50,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:12:50,646 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2023-12-16 05:12:50,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-16 05:12:50,646 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2023-12-16 05:12:50,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-12-16 05:12:50,646 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:50,647 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:50,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-16 05:12:50,854 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 [2023-12-16 05:12:50,854 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:50,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:50,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1810344840, now seen corresponding path program 1 times [2023-12-16 05:12:50,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:50,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150047743] [2023-12-16 05:12:50,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:50,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:50,864 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:12:50,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882577284] [2023-12-16 05:12:50,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:12:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:12:50,876 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) [2023-12-16 05:12:50,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 05:12:50,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:50,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-16 05:12:50,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:12:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:12:50,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:12:51,081 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:12:51,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150047743] [2023-12-16 05:12:51,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:12:51,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882577284] [2023-12-16 05:12:51,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882577284] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:12:51,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:12:51,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-12-16 05:12:51,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202855824] [2023-12-16 05:12:51,082 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:12:51,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-16 05:12:51,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:51,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-16 05:12:51,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-16 05:12:51,084 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:12:51,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:12:51,164 INFO L93 Difference]: Finished difference Result 65 states and 82 transitions. [2023-12-16 05:12:51,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 05:12:51,165 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 25 [2023-12-16 05:12:51,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:12:51,166 INFO L225 Difference]: With dead ends: 65 [2023-12-16 05:12:51,166 INFO L226 Difference]: Without dead ends: 58 [2023-12-16 05:12:51,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2023-12-16 05:12:51,167 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 25 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:12:51,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 77 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:12:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-16 05:12:51,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-12-16 05:12:51,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 38 states have internal predecessors, (40), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2023-12-16 05:12:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2023-12-16 05:12:51,178 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 25 [2023-12-16 05:12:51,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:12:51,178 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2023-12-16 05:12:51,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-16 05:12:51,178 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2023-12-16 05:12:51,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-16 05:12:51,180 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:12:51,180 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:12:51,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 05:12:51,385 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 [2023-12-16 05:12:51,386 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:12:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:12:51,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1460518785, now seen corresponding path program 1 times [2023-12-16 05:12:51,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:12:51,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934636359] [2023-12-16 05:12:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:12:51,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:12:51,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1361864164] [2023-12-16 05:12:51,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:12:51,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:12:51,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:12:51,397 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) [2023-12-16 05:12:51,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 05:12:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:12:51,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 33 conjunts are in the unsatisfiable core [2023-12-16 05:12:51,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:12:51,718 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-16 05:12:51,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:12:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2023-12-16 05:12:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:12:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934636359] [2023-12-16 05:12:52,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:12:52,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361864164] [2023-12-16 05:12:52,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361864164] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:12:52,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:12:52,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-16 05:12:52,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850319108] [2023-12-16 05:12:52,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:12:52,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 05:12:52,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:12:52,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 05:12:52,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-16 05:12:52,760 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-16 05:13:05,547 WARN L293 SmtUtils]: Spent 12.67s on a formula simplification. DAG size of input: 50 DAG size of output: 48 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-16 05:13:06,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:13:06,264 INFO L93 Difference]: Finished difference Result 141 states and 192 transitions. [2023-12-16 05:13:06,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 05:13:06,265 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 55 [2023-12-16 05:13:06,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:13:06,266 INFO L225 Difference]: With dead ends: 141 [2023-12-16 05:13:06,266 INFO L226 Difference]: Without dead ends: 110 [2023-12-16 05:13:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2023-12-16 05:13:06,267 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 60 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-16 05:13:06,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 168 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-16 05:13:06,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-12-16 05:13:06,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 105. [2023-12-16 05:13:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 70 states have internal predecessors, (76), 31 states have call successors, (31), 10 states have call predecessors, (31), 10 states have return successors, (30), 24 states have call predecessors, (30), 30 states have call successors, (30) [2023-12-16 05:13:06,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 137 transitions. [2023-12-16 05:13:06,309 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 137 transitions. Word has length 55 [2023-12-16 05:13:06,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:13:06,310 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 137 transitions. [2023-12-16 05:13:06,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2) internal successors, (33), 14 states have internal predecessors, (33), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2023-12-16 05:13:06,310 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 137 transitions. [2023-12-16 05:13:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-16 05:13:06,315 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:13:06,315 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:13:06,332 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-16 05:13:06,520 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 [2023-12-16 05:13:06,521 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:13:06,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:13:06,521 INFO L85 PathProgramCache]: Analyzing trace with hash -814878683, now seen corresponding path program 1 times [2023-12-16 05:13:06,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:13:06,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139921975] [2023-12-16 05:13:06,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:06,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:13:06,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:13:06,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769973099] [2023-12-16 05:13:06,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:06,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:06,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:13:06,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:13:06,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 05:13:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:13:06,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-16 05:13:06,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:13:06,832 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-16 05:13:06,832 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:13:07,217 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-12-16 05:13:07,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:13:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139921975] [2023-12-16 05:13:07,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:13:07,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769973099] [2023-12-16 05:13:07,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769973099] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:13:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:13:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-16 05:13:07,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080053546] [2023-12-16 05:13:07,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:13:07,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 05:13:07,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:13:07,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 05:13:07,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2023-12-16 05:13:07,221 INFO L87 Difference]: Start difference. First operand 105 states and 137 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-16 05:13:10,839 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-16 05:13:10,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:13:10,914 INFO L93 Difference]: Finished difference Result 160 states and 209 transitions. [2023-12-16 05:13:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-16 05:13:10,914 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 66 [2023-12-16 05:13:10,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:13:10,916 INFO L225 Difference]: With dead ends: 160 [2023-12-16 05:13:10,916 INFO L226 Difference]: Without dead ends: 122 [2023-12-16 05:13:10,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-16 05:13:10,917 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 23 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-12-16 05:13:10,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 168 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-12-16 05:13:10,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-12-16 05:13:10,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 100. [2023-12-16 05:13:10,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 65 states have internal predecessors, (71), 27 states have call successors, (27), 11 states have call predecessors, (27), 11 states have return successors, (26), 23 states have call predecessors, (26), 26 states have call successors, (26) [2023-12-16 05:13:10,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2023-12-16 05:13:10,946 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 66 [2023-12-16 05:13:10,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:13:10,947 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2023-12-16 05:13:10,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-16 05:13:10,947 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2023-12-16 05:13:10,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-12-16 05:13:10,948 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:13:10,948 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:13:10,955 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 05:13:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:11,151 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:13:11,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:13:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1399001704, now seen corresponding path program 1 times [2023-12-16 05:13:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:13:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660693047] [2023-12-16 05:13:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:13:11,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:13:11,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1140602083] [2023-12-16 05:13:11,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:11,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:11,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:13:11,159 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:13:11,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 05:13:11,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:13:11,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-16 05:13:11,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:13:11,354 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-16 05:13:11,354 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:13:11,630 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 24 proven. 37 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-16 05:13:11,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:13:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660693047] [2023-12-16 05:13:11,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:13:11,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140602083] [2023-12-16 05:13:11,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140602083] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:13:11,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:13:11,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-16 05:13:11,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038999707] [2023-12-16 05:13:11,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:13:11,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-16 05:13:11,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:13:11,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-16 05:13:11,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2023-12-16 05:13:11,632 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-16 05:13:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:13:11,981 INFO L93 Difference]: Finished difference Result 116 states and 138 transitions. [2023-12-16 05:13:11,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-16 05:13:11,981 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 71 [2023-12-16 05:13:11,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:13:11,982 INFO L225 Difference]: With dead ends: 116 [2023-12-16 05:13:11,982 INFO L226 Difference]: Without dead ends: 85 [2023-12-16 05:13:11,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2023-12-16 05:13:11,983 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-16 05:13:11,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-16 05:13:11,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-16 05:13:11,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2023-12-16 05:13:11,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 56 states have internal predecessors, (59), 21 states have call successors, (21), 10 states have call predecessors, (21), 10 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-16 05:13:11,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-12-16 05:13:11,996 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 71 [2023-12-16 05:13:12,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:13:12,005 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-12-16 05:13:12,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.5) internal successors, (35), 15 states have internal predecessors, (35), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-16 05:13:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-12-16 05:13:12,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-16 05:13:12,006 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:13:12,006 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:13:12,028 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 05:13:12,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:12,211 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:13:12,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:13:12,211 INFO L85 PathProgramCache]: Analyzing trace with hash -2065528550, now seen corresponding path program 1 times [2023-12-16 05:13:12,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:13:12,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39221150] [2023-12-16 05:13:12,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:12,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:13:12,218 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:13:12,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315686369] [2023-12-16 05:13:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:12,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:12,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:13:12,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:13:12,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-16 05:13:12,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:13:12,288 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 8 conjunts are in the unsatisfiable core [2023-12-16 05:13:12,293 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:13:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2023-12-16 05:13:12,453 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:13:12,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:13:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39221150] [2023-12-16 05:13:12,453 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:13:12,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315686369] [2023-12-16 05:13:12,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315686369] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:13:12,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:13:12,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-16 05:13:12,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508845808] [2023-12-16 05:13:12,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:13:12,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-16 05:13:12,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:13:12,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-16 05:13:12,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-16 05:13:12,455 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-16 05:13:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:13:12,559 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2023-12-16 05:13:12,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-16 05:13:12,559 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 85 [2023-12-16 05:13:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:13:12,563 INFO L225 Difference]: With dead ends: 115 [2023-12-16 05:13:12,563 INFO L226 Difference]: Without dead ends: 85 [2023-12-16 05:13:12,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-12-16 05:13:12,564 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 8 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:13:12,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 85 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:13:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-12-16 05:13:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2023-12-16 05:13:12,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 51 states have internal predecessors, (53), 17 states have call successors, (17), 10 states have call predecessors, (17), 10 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-16 05:13:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2023-12-16 05:13:12,598 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 85 [2023-12-16 05:13:12,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:13:12,599 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2023-12-16 05:13:12,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2023-12-16 05:13:12,599 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2023-12-16 05:13:12,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-12-16 05:13:12,600 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:13:12,600 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-16 05:13:12,607 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-16 05:13:12,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:12,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:13:12,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:13:12,810 INFO L85 PathProgramCache]: Analyzing trace with hash -376584808, now seen corresponding path program 2 times [2023-12-16 05:13:12,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:13:12,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786857990] [2023-12-16 05:13:12,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:13:12,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:13:12,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:13:12,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000827936] [2023-12-16 05:13:12,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:13:12,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:13:12,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:13:12,820 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:13:12,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-16 05:13:12,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:13:12,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:13:12,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-16 05:13:12,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:13:13,173 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-16 05:13:13,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:13:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-16 05:13:33,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:13:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786857990] [2023-12-16 05:13:33,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:13:33,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000827936] [2023-12-16 05:13:33,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000827936] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:13:33,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:13:33,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-12-16 05:13:33,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097007425] [2023-12-16 05:13:33,247 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:13:33,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-16 05:13:33,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:13:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-16 05:13:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2023-12-16 05:13:33,250 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 19 states have internal predecessors, (43), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Received shutdown request... [2023-12-16 05:14:02,327 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:14:02,329 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:14:03,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-16 05:14:03,528 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-16 05:14:03,534 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 137 [2023-12-16 05:14:03,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 05:14:03,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2023-12-16 05:14:03,536 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 11 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:14:03,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-16 05:14:03,537 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:14:03,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-12-16 05:14:03,537 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (77states) and FLOYD_HOARE automaton (currently 7 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. [2023-12-16 05:14:03,541 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:14:03,545 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:14:03,546 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:14:03 BoogieIcfgContainer [2023-12-16 05:14:03,546 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:14:03,547 INFO L158 Benchmark]: Toolchain (without parser) took 78599.00ms. Allocated memory was 282.1MB in the beginning and 338.7MB in the end (delta: 56.6MB). Free memory was 238.5MB in the beginning and 207.0MB in the end (delta: 31.6MB). Peak memory consumption was 88.7MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,547 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 219.2MB. Free memory was 169.3MB in the beginning and 169.1MB in the end (delta: 155.2kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:14:03,547 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.44ms. Allocated memory is still 282.1MB. Free memory was 238.2MB in the beginning and 227.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,547 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.95ms. Allocated memory is still 282.1MB. Free memory was 227.1MB in the beginning and 225.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,547 INFO L158 Benchmark]: Boogie Preprocessor took 42.11ms. Allocated memory is still 282.1MB. Free memory was 225.5MB in the beginning and 223.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,547 INFO L158 Benchmark]: RCFGBuilder took 248.54ms. Allocated memory is still 282.1MB. Free memory was 223.7MB in the beginning and 212.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,548 INFO L158 Benchmark]: TraceAbstraction took 78122.78ms. Allocated memory was 282.1MB in the beginning and 338.7MB in the end (delta: 56.6MB). Free memory was 211.4MB in the beginning and 207.0MB in the end (delta: 4.5MB). Peak memory consumption was 61.4MB. Max. memory is 8.0GB. [2023-12-16 05:14:03,549 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 219.2MB. Free memory was 169.3MB in the beginning and 169.1MB in the end (delta: 155.2kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 160.44ms. Allocated memory is still 282.1MB. Free memory was 238.2MB in the beginning and 227.1MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 18.95ms. Allocated memory is still 282.1MB. Free memory was 227.1MB in the beginning and 225.5MB in the end (delta: 1.7MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 42.11ms. Allocated memory is still 282.1MB. Free memory was 225.5MB in the beginning and 223.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 248.54ms. Allocated memory is still 282.1MB. Free memory was 223.7MB in the beginning and 212.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 78122.78ms. Allocated memory was 282.1MB in the beginning and 338.7MB in the end (delta: 56.6MB). Free memory was 211.4MB in the beginning and 207.0MB in the end (delta: 4.5MB). Peak memory consumption was 61.4MB. 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 - TimeoutResultAtElement [Line: 17]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 17). Cancelled while NwaCegarLoop was constructing difference of abstraction (77states) and FLOYD_HOARE automaton (currently 7 states, 21 states before enhancement),while PredicateUnifier was unifying predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 78.1s, OverallIterations: 10, TraceHistogramMax: 14, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 52.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 226 SdHoareTripleChecker+Valid, 9.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 187 mSDsluCounter, 1061 SdHoareTripleChecker+Invalid, 8.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 833 mSDsCounter, 200 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1232 IncrementalHoareTripleChecker+Invalid, 1433 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 200 mSolverCounterUnsat, 228 mSDtfsCounter, 1232 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 748 GetRequests, 637 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 16.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=6, InterpolantAutomatonStates: 73, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 9 MinimizatonAttempts, 50 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 23.5s InterpolantComputationTime, 434 NumberOfCodeBlocks, 434 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 738 ConstructedInterpolants, 0 QuantifiedInterpolants, 14533 SizeOfPredicates, 24 NumberOfNonLiveVariables, 1119 ConjunctsInSsa, 187 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 2010/2330 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown