/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 true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 19:05:53,117 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 19:05:53,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 19:05:53,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 19:05:53,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 19:05:53,213 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 19:05:53,213 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 19:05:53,213 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 19:05:53,214 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 19:05:53,217 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 19:05:53,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 19:05:53,217 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 19:05:53,217 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 19:05:53,218 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 19:05:53,218 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 19:05:53,219 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 19:05:53,219 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 19:05:53,219 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 19:05:53,219 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 19:05:53,220 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 19:05:53,220 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 19:05:53,220 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 19:05:53,221 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 19:05:53,222 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 19:05:53,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:05:53,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 19:05:53,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 19:05:53,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 19:05:53,224 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 19:05:53,224 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 19:05:53,224 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 19:05:53,224 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 19:05:53,224 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 19:05:53,401 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 19:05:53,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 19:05:53,417 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 19:05:53,418 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 19:05:53,418 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 19:05:53,419 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps6-ll.c [2023-12-19 19:05:54,424 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 19:05:54,569 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 19:05:54,569 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/ps6-ll.c [2023-12-19 19:05:54,574 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92ce35d6/77561ef282d94fb691ba60dfe6f72bfb/FLAG73ce8edcc [2023-12-19 19:05:54,589 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e92ce35d6/77561ef282d94fb691ba60dfe6f72bfb [2023-12-19 19:05:54,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 19:05:54,591 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 19:05:54,593 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 19:05:54,594 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 19:05:54,597 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 19:05:54,597 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,598 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7d3727 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54, skipping insertion in model container [2023-12-19 19:05:54,598 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,613 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 19:05:54,727 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/ps6-ll.c[458,471] [2023-12-19 19:05:54,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:05:54,755 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 19:05:54,763 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/ps6-ll.c[458,471] [2023-12-19 19:05:54,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:05:54,788 INFO L206 MainTranslator]: Completed translation [2023-12-19 19:05:54,789 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54 WrapperNode [2023-12-19 19:05:54,789 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 19:05:54,790 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 19:05:54,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 19:05:54,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 19:05:54,794 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,798 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,812 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2023-12-19 19:05:54,813 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 19:05:54,813 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 19:05:54,813 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 19:05:54,813 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 19:05:54,820 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,820 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,828 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,838 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-19 19:05:54,838 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,844 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,846 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,847 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,850 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,852 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 19:05:54,852 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 19:05:54,853 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 19:05:54,853 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 19:05:54,853 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (1/1) ... [2023-12-19 19:05:54,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:05:54,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:54,873 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) [2023-12-19 19:05:54,891 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 [2023-12-19 19:05:54,897 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 19:05:54,897 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 19:05:54,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 19:05:54,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 19:05:54,897 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 19:05:54,898 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 19:05:54,936 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 19:05:54,937 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 19:05:55,019 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 19:05:55,032 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 19:05:55,032 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-19 19:05:55,032 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:05:55 BoogieIcfgContainer [2023-12-19 19:05:55,032 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 19:05:55,034 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 19:05:55,034 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 19:05:55,036 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 19:05:55,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:05:54" (1/3) ... [2023-12-19 19:05:55,036 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452f449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:05:55, skipping insertion in model container [2023-12-19 19:05:55,036 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:05:54" (2/3) ... [2023-12-19 19:05:55,037 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2452f449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:05:55, skipping insertion in model container [2023-12-19 19:05:55,037 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:05:55" (3/3) ... [2023-12-19 19:05:55,037 INFO L112 eAbstractionObserver]: Analyzing ICFG ps6-ll.c [2023-12-19 19:05:55,050 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 19:05:55,051 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 19:05:55,088 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 19:05:55,094 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;@46902d96, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 19:05:55,094 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 19:05:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 19:05:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-19 19:05:55,102 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:55,103 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:55,103 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:55,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:55,106 INFO L85 PathProgramCache]: Analyzing trace with hash -959206418, now seen corresponding path program 1 times [2023-12-19 19:05:55,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:55,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621444431] [2023-12-19 19:05:55,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:55,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:05:55,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:05:55,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621444431] [2023-12-19 19:05:55,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 19:05:55,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770242543] [2023-12-19 19:05:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:55,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:55,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:55,208 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) [2023-12-19 19:05:55,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 19:05:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:05:55,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 19:05:55,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:05:55,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 19:05:55,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:05:55,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770242543] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:05:55,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:05:55,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 19:05:55,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821633472] [2023-12-19 19:05:55,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:05:55,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 19:05:55,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:05:55,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 19:05:55,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:05:55,308 INFO L87 Difference]: Start difference. First operand has 16 states, 10 states have (on average 1.6) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) 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) [2023-12-19 19:05:55,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:05:55,324 INFO L93 Difference]: Finished difference Result 30 states and 44 transitions. [2023-12-19 19:05:55,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 19:05:55,326 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 [2023-12-19 19:05:55,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:05:55,330 INFO L225 Difference]: With dead ends: 30 [2023-12-19 19:05:55,330 INFO L226 Difference]: Without dead ends: 14 [2023-12-19 19:05:55,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:05:55,334 INFO L413 NwaCegarLoop]: 16 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, 16 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 [2023-12-19 19:05:55,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:05:55,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-12-19 19:05:55,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-12-19 19:05:55,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-19 19:05:55,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2023-12-19 19:05:55,359 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 8 [2023-12-19 19:05:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:05:55,359 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2023-12-19 19:05:55,360 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) [2023-12-19 19:05:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2023-12-19 19:05:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-19 19:05:55,360 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:55,361 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:55,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 19:05:55,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-19 19:05:55,566 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:55,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:55,567 INFO L85 PathProgramCache]: Analyzing trace with hash 817588404, now seen corresponding path program 1 times [2023-12-19 19:05:55,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:55,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058115949] [2023-12-19 19:05:55,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:55,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:55,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:05:55,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055035344] [2023-12-19 19:05:55,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:55,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:55,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:55,586 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) [2023-12-19 19:05:55,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 19:05:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:05:55,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-19 19:05:55,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:05:55,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 19:05:55,674 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:05:55,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:05:55,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058115949] [2023-12-19 19:05:55,675 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:05:55,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055035344] [2023-12-19 19:05:55,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055035344] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:05:55,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:05:55,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 19:05:55,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189607549] [2023-12-19 19:05:55,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:05:55,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:05:55,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:05:55,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:05:55,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:05:55,676 INFO L87 Difference]: Start difference. First operand 14 states and 16 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) [2023-12-19 19:05:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:05:56,060 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-19 19:05:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 19:05:56,061 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 [2023-12-19 19:05:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:05:56,061 INFO L225 Difference]: With dead ends: 25 [2023-12-19 19:05:56,061 INFO L226 Difference]: Without dead ends: 21 [2023-12-19 19:05:56,062 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 [2023-12-19 19:05:56,063 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-19 19:05:56,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 38 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-19 19:05:56,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-19 19:05:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-19 19:05:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 15 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 19:05:56,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-12-19 19:05:56,068 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 8 [2023-12-19 19:05:56,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:05:56,068 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-12-19 19:05:56,068 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) [2023-12-19 19:05:56,068 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-12-19 19:05:56,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-19 19:05:56,068 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:56,068 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:56,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-19 19:05:56,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-19 19:05:56,273 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:56,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:56,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1282095925, now seen corresponding path program 1 times [2023-12-19 19:05:56,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:56,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25930186] [2023-12-19 19:05:56,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:56,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:56,295 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:05:56,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136563793] [2023-12-19 19:05:56,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:56,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:56,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:56,297 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) [2023-12-19 19:05:56,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 19:05:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:05:56,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 19:05:56,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:05:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-19 19:05:56,411 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:05:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-19 19:05:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:05:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25930186] [2023-12-19 19:05:56,542 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:05:56,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136563793] [2023-12-19 19:05:56,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136563793] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:05:56,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:05:56,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-12-19 19:05:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491550855] [2023-12-19 19:05:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:05:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:05:56,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:05:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:05:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:05:56,544 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-12-19 19:05:56,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:05:56,575 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-12-19 19:05:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:05:56,576 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2023-12-19 19:05:56,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:05:56,576 INFO L225 Difference]: With dead ends: 27 [2023-12-19 19:05:56,576 INFO L226 Difference]: Without dead ends: 23 [2023-12-19 19:05:56,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2023-12-19 19:05:56,577 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:05:56,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 33 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:05:56,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-19 19:05:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-12-19 19:05:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-19 19:05:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-12-19 19:05:56,583 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2023-12-19 19:05:56,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:05:56,584 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-12-19 19:05:56,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2023-12-19 19:05:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-12-19 19:05:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-19 19:05:56,584 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:56,584 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:56,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-19 19:05:56,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:56,789 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:56,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:56,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1293644165, now seen corresponding path program 1 times [2023-12-19 19:05:56,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:56,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454787365] [2023-12-19 19:05:56,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:56,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:56,796 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:05:56,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231898797] [2023-12-19 19:05:56,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:56,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:56,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:56,800 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) [2023-12-19 19:05:56,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 19:05:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:05:56,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 24 conjunts are in the unsatisfiable core [2023-12-19 19:05:56,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:05:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 19:05:56,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:05:57,173 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-19 19:05:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:05:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454787365] [2023-12-19 19:05:57,173 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:05:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231898797] [2023-12-19 19:05:57,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231898797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:05:57,174 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:05:57,174 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-19 19:05:57,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997162868] [2023-12-19 19:05:57,174 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:05:57,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-19 19:05:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:05:57,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-19 19:05:57,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-19 19:05:57,176 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 19:05:58,381 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:05:58,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:05:58,442 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-12-19 19:05:58,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-19 19:05:58,442 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 26 [2023-12-19 19:05:58,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:05:58,443 INFO L225 Difference]: With dead ends: 46 [2023-12-19 19:05:58,443 INFO L226 Difference]: Without dead ends: 36 [2023-12-19 19:05:58,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2023-12-19 19:05:58,444 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:05:58,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 90 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-19 19:05:58,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-19 19:05:58,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-19 19:05:58,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 19:05:58,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2023-12-19 19:05:58,453 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 26 [2023-12-19 19:05:58,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:05:58,453 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2023-12-19 19:05:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-19 19:05:58,454 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2023-12-19 19:05:58,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-19 19:05:58,455 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:58,455 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:58,459 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-19 19:05:58,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:58,659 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:58,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:58,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1936035506, now seen corresponding path program 2 times [2023-12-19 19:05:58,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:58,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513386748] [2023-12-19 19:05:58,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:58,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:58,670 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:05:58,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [384547120] [2023-12-19 19:05:58,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:05:58,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:58,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:58,671 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) [2023-12-19 19:05:58,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 19:05:58,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:05:58,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:05:58,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-19 19:05:58,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:05:58,918 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:05:58,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:05:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-19 19:05:59,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:05:59,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513386748] [2023-12-19 19:05:59,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:05:59,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384547120] [2023-12-19 19:05:59,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384547120] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:05:59,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:05:59,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2023-12-19 19:05:59,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142070093] [2023-12-19 19:05:59,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:05:59,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 19:05:59,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:05:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 19:05:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2023-12-19 19:05:59,098 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-19 19:05:59,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:05:59,560 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2023-12-19 19:05:59,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 19:05:59,561 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 47 [2023-12-19 19:05:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:05:59,563 INFO L225 Difference]: With dead ends: 59 [2023-12-19 19:05:59,563 INFO L226 Difference]: Without dead ends: 51 [2023-12-19 19:05:59,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 19:05:59,566 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 31 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:05:59,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 212 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:05:59,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-19 19:05:59,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-19 19:05:59,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-19 19:05:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2023-12-19 19:05:59,589 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 47 [2023-12-19 19:05:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:05:59,590 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2023-12-19 19:05:59,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-19 19:05:59,590 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2023-12-19 19:05:59,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-12-19 19:05:59,591 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:05:59,591 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:05:59,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-19 19:05:59,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:59,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:05:59,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:05:59,797 INFO L85 PathProgramCache]: Analyzing trace with hash -118276357, now seen corresponding path program 3 times [2023-12-19 19:05:59,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:05:59,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70286976] [2023-12-19 19:05:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:05:59,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:05:59,805 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:05:59,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1094955817] [2023-12-19 19:05:59,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:05:59,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:05:59,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:05:59,807 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) [2023-12-19 19:05:59,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 19:06:01,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-19 19:06:01,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:06:01,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 52 conjunts are in the unsatisfiable core [2023-12-19 19:06:01,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:06:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 36 proven. 151 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-19 19:06:01,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:06:09,982 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 4)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 4))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:06:18,028 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:06:30,040 WARN L293 SmtUtils]: Spent 8.00s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:06:38,062 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42|))) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29| 4)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 4))) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 7)) 12) 0))))) is different from true [2023-12-19 19:06:56,096 WARN L293 SmtUtils]: Spent 14.02s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:07:12,118 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:07:20,127 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (= c___VERIFIER_assert_~cond 0) (forall ((|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29| Int) (|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| Int)) (let ((.cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42|))) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_29| 4)) (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 4))) (= (mod (+ .cse0 (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 6) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 10) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_42| 7)) 12) 0))))) is different from true [2023-12-19 19:07:32,257 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 5)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 5))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:07:48,376 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 6) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 6))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:08:03,816 WARN L293 SmtUtils]: Spent 7.35s on a formula simplification that was a NOOP. DAG size: 14 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-19 19:08:07,819 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 7)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 7) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:08:24,147 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 8)) (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 8))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:08:40,181 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|))) (or (= (+ .cse0 (* |c_ULTIMATE.start_main_~y~0#1| 9)) (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 9))) (not (= 0 (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 10) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 7) .cse0 (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 6)) 12))))) is different from false [2023-12-19 19:08:48,201 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 36 proven. 22 refuted. 15 times theorem prover too weak. 190 trivial. 114 not checked. [2023-12-19 19:08:48,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:08:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70286976] [2023-12-19 19:08:48,201 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:08:48,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094955817] [2023-12-19 19:08:48,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094955817] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:08:48,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:08:48,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2023-12-19 19:08:48,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473720199] [2023-12-19 19:08:48,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:08:48,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-12-19 19:08:48,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:08:48,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-12-19 19:08:48,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=471, Unknown=8, NotChecked=408, Total=992 [2023-12-19 19:08:48,203 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 22 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 19:08:48,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:08:48,834 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2023-12-19 19:08:48,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-19 19:08:48,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 22 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 82 [2023-12-19 19:08:48,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:08:48,835 INFO L225 Difference]: With dead ends: 56 [2023-12-19 19:08:48,835 INFO L226 Difference]: Without dead ends: 0 [2023-12-19 19:08:48,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=230, Invalid=1200, Unknown=8, NotChecked=632, Total=2070 [2023-12-19 19:08:48,836 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:08:48,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 398 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 418 Invalid, 0 Unknown, 349 Unchecked, 0.2s Time] [2023-12-19 19:08:48,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-19 19:08:48,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-19 19:08:48,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-19 19:08:48,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-19 19:08:48,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 82 [2023-12-19 19:08:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:08:48,837 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-19 19:08:48,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 30 states have internal predecessors, (58), 22 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-19 19:08:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-19 19:08:48,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-19 19:08:48,839 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 19:08:48,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 19:08:49,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:08:49,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-12-19 19:08:49,499 INFO L895 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (+ |ULTIMATE.start_main_~y~0#1| .cse0) (+ |ULTIMATE.start_main_~c~0#1| .cse1)) (= (+ (* 2 |ULTIMATE.start_main_~c~0#1|) .cse1) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse0)) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)) (or (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~k~0#1| 256))) [2023-12-19 19:08:49,499 INFO L895 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2023-12-19 19:08:49,499 INFO L895 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: (let ((.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)))) [2023-12-19 19:08:49,499 INFO L895 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse1 (* |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~y~0#1|)) (.cse0 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (and (= (+ |ULTIMATE.start_main_~y~0#1| .cse0) (+ |ULTIMATE.start_main_~c~0#1| .cse1)) (= (+ (* 2 |ULTIMATE.start_main_~c~0#1|) .cse1) (+ (* 2 |ULTIMATE.start_main_~y~0#1|) .cse0)) (= (+ (* 6 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 2 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|)) (* 5 (* |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1| |ULTIMATE.start_main_~y~0#1|))) (+ (* |ULTIMATE.start_main_~x~0#1| 12) .cse0)) (or (= (* |ULTIMATE.start_main_~k~0#1| |ULTIMATE.start_main_~y~0#1|) .cse0) (< |ULTIMATE.start_main_~c~0#1| |ULTIMATE.start_main_~k~0#1|)) (<= |ULTIMATE.start_main_~k~0#1| 256))) [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point L28-1(lines 27 36) no Hoare annotation was computed. [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point L39(line 39) no Hoare annotation was computed. [2023-12-19 19:08:49,499 INFO L899 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2023-12-19 19:08:49,500 INFO L899 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2023-12-19 19:08:49,500 INFO L899 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2023-12-19 19:08:49,500 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2023-12-19 19:08:49,500 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 9 15) the Hoare annotation is: true [2023-12-19 19:08:49,500 INFO L899 garLoopResultBuilder]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2023-12-19 19:08:49,500 INFO L899 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2023-12-19 19:08:49,502 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2023-12-19 19:08:49,503 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 19:08:49,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 07:08:49 BoogieIcfgContainer [2023-12-19 19:08:49,515 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 19:08:49,516 INFO L158 Benchmark]: Toolchain (without parser) took 174924.59ms. Allocated memory is still 265.3MB. Free memory was 222.0MB in the beginning and 217.7MB in the end (delta: 4.3MB). Peak memory consumption was 144.5MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,516 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 211.8MB. Free memory is still 161.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 19:08:49,516 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.88ms. Allocated memory is still 265.3MB. Free memory was 221.6MB in the beginning and 210.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,516 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.49ms. Allocated memory is still 265.3MB. Free memory was 210.4MB in the beginning and 209.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,516 INFO L158 Benchmark]: Boogie Preprocessor took 38.77ms. Allocated memory is still 265.3MB. Free memory was 209.0MB in the beginning and 207.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,517 INFO L158 Benchmark]: RCFGBuilder took 179.94ms. Allocated memory is still 265.3MB. Free memory was 207.3MB in the beginning and 196.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,517 INFO L158 Benchmark]: TraceAbstraction took 174481.90ms. Allocated memory is still 265.3MB. Free memory was 195.7MB in the beginning and 217.7MB in the end (delta: -21.9MB). Peak memory consumption was 118.3MB. Max. memory is 8.0GB. [2023-12-19 19:08:49,518 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 211.8MB. Free memory is still 161.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.88ms. Allocated memory is still 265.3MB. Free memory was 221.6MB in the beginning and 210.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.49ms. Allocated memory is still 265.3MB. Free memory was 210.4MB in the beginning and 209.0MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 38.77ms. Allocated memory is still 265.3MB. Free memory was 209.0MB in the beginning and 207.3MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 179.94ms. Allocated memory is still 265.3MB. Free memory was 207.3MB in the beginning and 196.2MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 174481.90ms. Allocated memory is still 265.3MB. Free memory was 195.7MB in the beginning and 217.7MB in the end (delta: -21.9MB). Peak memory consumption was 118.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 174.4s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 79 SdHoareTripleChecker+Valid, 1.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 787 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 349 IncrementalHoareTripleChecker+Unchecked, 691 mSDsCounter, 68 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 748 IncrementalHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 68 mSolverCounterUnsat, 96 mSDtfsCounter, 748 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 385 GetRequests, 273 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 8 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 33.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=5, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 34 PreInvPairs, 72 NumberOfFragments, 231 HoareAnnotationTreeSize, 34 FormulaSimplifications, 1849 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FormulaSimplificationsInter, 1210 FormulaSimplificationTreeSizeReductionInter, 0.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 167.6s InterpolantComputationTime, 194 NumberOfCodeBlocks, 194 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 346 ConstructedInterpolants, 3 QuantifiedInterpolants, 2780 SizeOfPredicates, 20 NumberOfNonLiveVariables, 576 ConjunctsInSsa, 138 ConjunctsInUnsatCore, 10 InterpolantComputations, 3 PerfectInterpolantSequences, 636/1008 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: ((((((y + (y * y)) == (c + (c * y))) && (((2 * c) + (c * y)) == ((2 * y) + (y * y)))) && ((((6 * ((((y * y) * y) * y) * y)) + (2 * (((((y * y) * y) * y) * y) * y))) + (5 * (((y * y) * y) * y))) == ((x * 12) + (y * y)))) && (((k * y) == (y * y)) || (c < k))) && (k <= 256)) RESULT: Ultimate proved your program to be correct! [2023-12-19 19:08:49,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...