/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/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-94.i -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-15 20:49:00,838 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-15 20:49:00,927 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-15 20:49:00,932 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-15 20:49:00,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-15 20:49:00,953 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-15 20:49:00,954 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-15 20:49:00,954 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-15 20:49:00,955 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-15 20:49:00,955 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-15 20:49:00,955 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-15 20:49:00,956 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-15 20:49:00,956 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-15 20:49:00,957 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-15 20:49:00,957 INFO L153 SettingsManager]: * Use SBE=true [2023-12-15 20:49:00,958 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-15 20:49:00,959 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-15 20:49:00,959 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-15 20:49:00,959 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-15 20:49:00,960 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-15 20:49:00,961 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-15 20:49:00,961 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-15 20:49:00,962 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-15 20:49:00,962 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-15 20:49:00,962 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-15 20:49:00,962 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-15 20:49:00,962 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-15 20:49:00,963 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-15 20:49:00,963 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-15 20:49:00,963 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-15 20:49:00,964 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-15 20:49:00,965 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-15 20:49:00,965 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:49:00,965 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-15 20:49:00,965 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-15 20:49:00,965 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-15 20:49:00,965 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-15 20:49:00,966 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-15 20:49:00,966 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-15 20:49:00,966 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-15 20:49:00,966 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-15 20:49:00,966 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-15 20:49:00,967 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-15 20:49:00,967 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-15 20:49:01,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-15 20:49:01,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-15 20:49:01,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-15 20:49:01,187 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-15 20:49:01,187 INFO L274 PluginConnector]: CDTParser initialized [2023-12-15 20:49:01,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-94.i [2023-12-15 20:49:02,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-15 20:49:02,602 INFO L384 CDTParser]: Found 1 translation units. [2023-12-15 20:49:02,603 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-94.i [2023-12-15 20:49:02,615 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8392604/810c651cc6f14d6c8edbcbf086c58358/FLAG33c2d5089 [2023-12-15 20:49:02,629 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c8392604/810c651cc6f14d6c8edbcbf086c58358 [2023-12-15 20:49:02,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-15 20:49:02,633 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-15 20:49:02,635 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-15 20:49:02,635 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-15 20:49:02,639 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-15 20:49:02,640 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:49:02" (1/1) ... [2023-12-15 20:49:02,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f356edf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:02, skipping insertion in model container [2023-12-15 20:49:02,641 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 08:49:02" (1/1) ... [2023-12-15 20:49:02,679 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-15 20:49:02,806 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-94.i[916,929] [2023-12-15 20:49:02,889 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:49:02,906 INFO L202 MainTranslator]: Completed pre-run [2023-12-15 20:49:02,915 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/hardness-nfm22/hardness_loopvsstraightlinecode_100-1loop_file-94.i[916,929] [2023-12-15 20:49:02,984 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-15 20:49:03,006 INFO L206 MainTranslator]: Completed translation [2023-12-15 20:49:03,007 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03 WrapperNode [2023-12-15 20:49:03,007 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-15 20:49:03,008 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-15 20:49:03,008 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-15 20:49:03,008 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-15 20:49:03,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,025 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,073 INFO L138 Inliner]: procedures = 26, calls = 40, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 216 [2023-12-15 20:49:03,074 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-15 20:49:03,074 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-15 20:49:03,074 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-15 20:49:03,074 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-15 20:49:03,084 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,091 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,123 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]. [2023-12-15 20:49:03,124 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,124 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,138 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,141 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,146 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,153 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-15 20:49:03,164 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-15 20:49:03,164 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-15 20:49:03,164 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-15 20:49:03,165 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (1/1) ... [2023-12-15 20:49:03,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-15 20:49:03,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:03,196 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) [2023-12-15 20:49:03,228 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-15 20:49:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-15 20:49:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-15 20:49:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-15 20:49:03,229 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-15 20:49:03,229 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-15 20:49:03,212 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 [2023-12-15 20:49:03,332 INFO L241 CfgBuilder]: Building ICFG [2023-12-15 20:49:03,335 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-15 20:49:03,779 INFO L282 CfgBuilder]: Performing block encoding [2023-12-15 20:49:03,833 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-15 20:49:03,833 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-15 20:49:03,834 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:49:03 BoogieIcfgContainer [2023-12-15 20:49:03,834 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-15 20:49:03,836 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-15 20:49:03,837 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-15 20:49:03,839 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-15 20:49:03,839 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 08:49:02" (1/3) ... [2023-12-15 20:49:03,840 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af6ce4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:49:03, skipping insertion in model container [2023-12-15 20:49:03,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 08:49:03" (2/3) ... [2023-12-15 20:49:03,841 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4af6ce4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 08:49:03, skipping insertion in model container [2023-12-15 20:49:03,841 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 08:49:03" (3/3) ... [2023-12-15 20:49:03,842 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_loopvsstraightlinecode_100-1loop_file-94.i [2023-12-15 20:49:03,858 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-15 20:49:03,858 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-15 20:49:03,906 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-15 20:49:03,911 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;@44b6ceea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-15 20:49:03,911 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-15 20:49:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 84 states, 54 states have (on average 1.5) internal successors, (81), 55 states have internal predecessors, (81), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2023-12-15 20:49:03,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-15 20:49:03,934 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:03,935 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:03,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:03,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:03,942 INFO L85 PathProgramCache]: Analyzing trace with hash 487860691, now seen corresponding path program 1 times [2023-12-15 20:49:03,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:03,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802688002] [2023-12-15 20:49:03,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:03,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:04,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:04,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071752167] [2023-12-15 20:49:04,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:04,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:04,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:04,164 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) [2023-12-15 20:49:04,172 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-15 20:49:04,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:04,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-15 20:49:04,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-12-15 20:49:04,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:49:04,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:49:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802688002] [2023-12-15 20:49:04,504 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:49:04,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071752167] [2023-12-15 20:49:04,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071752167] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:49:04,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:49:04,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-15 20:49:04,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878277324] [2023-12-15 20:49:04,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:49:04,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 20:49:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:49:04,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 20:49:04,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:49:04,535 INFO L87 Difference]: Start difference. First operand has 84 states, 54 states have (on average 1.5) internal successors, (81), 55 states have internal predecessors, (81), 27 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:04,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:49:04,729 INFO L93 Difference]: Finished difference Result 199 states and 361 transitions. [2023-12-15 20:49:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-15 20:49:04,732 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 174 [2023-12-15 20:49:04,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:49:04,745 INFO L225 Difference]: With dead ends: 199 [2023-12-15 20:49:04,745 INFO L226 Difference]: Without dead ends: 112 [2023-12-15 20:49:04,753 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-12-15 20:49:04,758 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 76 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-15 20:49:04,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 369 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-15 20:49:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-12-15 20:49:04,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2023-12-15 20:49:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 66 states have internal predecessors, (87), 43 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2023-12-15 20:49:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 173 transitions. [2023-12-15 20:49:04,806 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 173 transitions. Word has length 174 [2023-12-15 20:49:04,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:49:04,807 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 173 transitions. [2023-12-15 20:49:04,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 173 transitions. [2023-12-15 20:49:04,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:49:04,815 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:04,815 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:04,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-15 20:49:05,016 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 [2023-12-15 20:49:05,016 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:05,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1000926220, now seen corresponding path program 1 times [2023-12-15 20:49:05,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:05,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688123803] [2023-12-15 20:49:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:05,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:05,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2140632179] [2023-12-15 20:49:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:05,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:05,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:05,070 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) [2023-12-15 20:49:05,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-15 20:49:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:05,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 6 conjunts are in the unsatisfiable core [2023-12-15 20:49:05,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-12-15 20:49:05,763 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:49:05,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:49:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688123803] [2023-12-15 20:49:05,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:49:05,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140632179] [2023-12-15 20:49:05,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140632179] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:49:05,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:49:05,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-15 20:49:05,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481218583] [2023-12-15 20:49:05,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:49:05,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-15 20:49:05,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:49:05,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-15 20:49:05,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:49:05,769 INFO L87 Difference]: Start difference. First operand 111 states and 173 transitions. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:05,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:49:05,869 INFO L93 Difference]: Finished difference Result 280 states and 433 transitions. [2023-12-15 20:49:05,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-12-15 20:49:05,869 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-12-15 20:49:05,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:49:05,873 INFO L225 Difference]: With dead ends: 280 [2023-12-15 20:49:05,873 INFO L226 Difference]: Without dead ends: 195 [2023-12-15 20:49:05,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-12-15 20:49:05,875 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 46 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-15 20:49:05,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 347 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-15 20:49:05,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-12-15 20:49:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2023-12-15 20:49:05,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 117 states have (on average 1.3247863247863247) internal successors, (155), 118 states have internal predecessors, (155), 70 states have call successors, (70), 4 states have call predecessors, (70), 4 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2023-12-15 20:49:05,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 295 transitions. [2023-12-15 20:49:05,903 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 295 transitions. Word has length 175 [2023-12-15 20:49:05,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:49:05,904 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 295 transitions. [2023-12-15 20:49:05,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 3 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:05,905 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 295 transitions. [2023-12-15 20:49:05,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:49:05,906 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:05,907 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:05,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-15 20:49:06,113 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 [2023-12-15 20:49:06,113 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:06,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:06,114 INFO L85 PathProgramCache]: Analyzing trace with hash -782071502, now seen corresponding path program 1 times [2023-12-15 20:49:06,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:06,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490160461] [2023-12-15 20:49:06,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:06,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:06,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:06,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [53195254] [2023-12-15 20:49:06,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:06,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:06,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:06,194 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) [2023-12-15 20:49:06,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-15 20:49:06,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:06,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-15 20:49:06,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:06,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-12-15 20:49:06,893 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:49:06,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:49:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490160461] [2023-12-15 20:49:06,894 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:49:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53195254] [2023-12-15 20:49:06,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53195254] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:49:06,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:49:06,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-15 20:49:06,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395986432] [2023-12-15 20:49:06,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:49:06,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-15 20:49:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:49:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-15 20:49:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-15 20:49:06,898 INFO L87 Difference]: Start difference. First operand 192 states and 295 transitions. Second operand has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:08,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:49:08,252 INFO L93 Difference]: Finished difference Result 473 states and 719 transitions. [2023-12-15 20:49:08,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:49:08,253 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Word has length 175 [2023-12-15 20:49:08,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:49:08,256 INFO L225 Difference]: With dead ends: 473 [2023-12-15 20:49:08,256 INFO L226 Difference]: Without dead ends: 307 [2023-12-15 20:49:08,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-15 20:49:08,258 INFO L413 NwaCegarLoop]: 114 mSDtfsCounter, 145 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-12-15 20:49:08,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 454 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-12-15 20:49:08,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-12-15 20:49:08,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 263. [2023-12-15 20:49:08,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 176 states have (on average 1.375) internal successors, (242), 176 states have internal predecessors, (242), 81 states have call successors, (81), 5 states have call predecessors, (81), 5 states have return successors, (81), 81 states have call predecessors, (81), 81 states have call successors, (81) [2023-12-15 20:49:08,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 404 transitions. [2023-12-15 20:49:08,294 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 404 transitions. Word has length 175 [2023-12-15 20:49:08,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:49:08,295 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 404 transitions. [2023-12-15 20:49:08,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.166666666666667) internal successors, (43), 5 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) [2023-12-15 20:49:08,296 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 404 transitions. [2023-12-15 20:49:08,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:49:08,298 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:08,298 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:08,312 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-15 20:49:08,504 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 [2023-12-15 20:49:08,504 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:08,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:08,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1591418128, now seen corresponding path program 1 times [2023-12-15 20:49:08,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:08,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41918073] [2023-12-15 20:49:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:08,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:08,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:08,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2026886322] [2023-12-15 20:49:08,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:08,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:08,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:08,567 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) [2023-12-15 20:49:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-15 20:49:08,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:08,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-15 20:49:08,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:09,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 641 proven. 93 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2023-12-15 20:49:09,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:49:11,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:49:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41918073] [2023-12-15 20:49:11,454 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:49:11,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026886322] [2023-12-15 20:49:11,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026886322] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 20:49:11,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 20:49:11,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-12-15 20:49:11,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389596240] [2023-12-15 20:49:11,455 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 20:49:11,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-15 20:49:11,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:49:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-15 20:49:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-12-15 20:49:11,456 INFO L87 Difference]: Start difference. First operand 263 states and 404 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-12-15 20:49:16,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-15 20:49:22,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:49:22,310 INFO L93 Difference]: Finished difference Result 845 states and 1243 transitions. [2023-12-15 20:49:22,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-15 20:49:22,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) Word has length 175 [2023-12-15 20:49:22,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:49:22,315 INFO L225 Difference]: With dead ends: 845 [2023-12-15 20:49:22,315 INFO L226 Difference]: Without dead ends: 659 [2023-12-15 20:49:22,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=400, Invalid=1160, Unknown=0, NotChecked=0, Total=1560 [2023-12-15 20:49:22,317 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 361 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 98 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 680 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2023-12-15 20:49:22,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 680 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 749 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2023-12-15 20:49:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2023-12-15 20:49:22,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 420. [2023-12-15 20:49:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 295 states have (on average 1.3661016949152542) internal successors, (403), 295 states have internal predecessors, (403), 108 states have call successors, (108), 16 states have call predecessors, (108), 16 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-15 20:49:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 619 transitions. [2023-12-15 20:49:22,393 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 619 transitions. Word has length 175 [2023-12-15 20:49:22,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:49:22,396 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 619 transitions. [2023-12-15 20:49:22,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 4 states have call successors, (27), 4 states have call predecessors, (27), 6 states have return successors, (27), 4 states have call predecessors, (27), 4 states have call successors, (27) [2023-12-15 20:49:22,396 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 619 transitions. [2023-12-15 20:49:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:49:22,399 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:22,399 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:22,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-15 20:49:22,611 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 [2023-12-15 20:49:22,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:22,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:22,612 INFO L85 PathProgramCache]: Analyzing trace with hash -523906064, now seen corresponding path program 1 times [2023-12-15 20:49:22,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:22,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236538623] [2023-12-15 20:49:22,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:22,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:22,652 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:22,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694491269] [2023-12-15 20:49:22,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:22,653 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:22,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:22,660 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) [2023-12-15 20:49:22,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-15 20:49:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:22,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-15 20:49:22,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 632 proven. 93 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2023-12-15 20:49:24,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:49:29,233 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (mod c_~var_1_26~0 65536))) (let ((.cse6 (< c_~var_1_27~0 0)) (.cse5 (< 0 (+ c_~var_1_27~0 1))) (.cse2 (+ .cse3 c_~var_1_27~0)) (.cse0 (mod c_~var_1_32~0 65536)) (.cse7 (forall ((~var_1_19~0 Int)) (or (not (= (mod ~var_1_19~0 c_~var_1_27~0) 0)) (< c_~last_1_var_1_20~0 ~var_1_19~0) (< 255 ~var_1_19~0))))) (and (forall ((~var_1_19~0 Int)) (let ((.cse1 (mod ~var_1_19~0 c_~var_1_27~0))) (or (< ~var_1_19~0 0) (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 .cse1) .cse2) (< 255 ~var_1_19~0) (< (+ .cse0 c_~var_1_27~0 .cse1) .cse3)))) (forall ((~var_1_19~0 Int)) (let ((.cse4 (mod ~var_1_19~0 c_~var_1_27~0))) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 .cse4) .cse2) (= .cse4 0) (< 0 (+ ~var_1_19~0 1)) (< (+ .cse0 c_~var_1_27~0 .cse4) .cse3)))) (forall ((~var_1_19~0 Int)) (or (< ~var_1_19~0 0) (< (+ .cse0 (mod ~var_1_19~0 c_~var_1_27~0)) .cse3) (< c_~last_1_var_1_20~0 ~var_1_19~0) (< 255 ~var_1_19~0))) (or (forall ((~var_1_19~0 Int)) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (< 255 ~var_1_19~0) (< (+ .cse0 c_~var_1_27~0 (mod ~var_1_19~0 c_~var_1_27~0)) .cse3))) .cse5) (or (forall ((~var_1_19~0 Int)) (or (< ~var_1_19~0 0) (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 (mod ~var_1_19~0 c_~var_1_27~0)) .cse2) (< 255 ~var_1_19~0))) .cse6) (or (< .cse0 .cse3) .cse7) (or .cse5 (forall ((~var_1_19~0 Int)) (let ((.cse8 (mod ~var_1_19~0 c_~var_1_27~0))) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (= .cse8 0) (< 0 (+ ~var_1_19~0 1)) (< (+ .cse0 c_~var_1_27~0 .cse8) .cse3))))) (or .cse6 (forall ((~var_1_19~0 Int)) (let ((.cse9 (mod ~var_1_19~0 c_~var_1_27~0))) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 .cse9) .cse2) (= .cse9 0) (< 0 (+ ~var_1_19~0 1)))))) (or (forall ((~var_1_19~0 Int)) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 (mod ~var_1_19~0 c_~var_1_27~0)) .cse2) (< 255 ~var_1_19~0))) .cse6) (or (forall ((~var_1_19~0 Int)) (or (< ~var_1_19~0 0) (< c_~last_1_var_1_20~0 ~var_1_19~0) (< 255 ~var_1_19~0) (< (+ .cse0 c_~var_1_27~0 (mod ~var_1_19~0 c_~var_1_27~0)) .cse3))) .cse5) (forall ((~var_1_19~0 Int)) (let ((.cse10 (mod ~var_1_19~0 c_~var_1_27~0))) (or (< c_~last_1_var_1_20~0 ~var_1_19~0) (< (+ .cse0 .cse10) .cse2) (< 255 ~var_1_19~0) (< (+ .cse0 c_~var_1_27~0 .cse10) .cse3)))) (or (< .cse0 .cse2) (< (+ .cse0 c_~var_1_27~0) .cse3) .cse7)))) is different from false [2023-12-15 20:49:33,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:49:33,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236538623] [2023-12-15 20:49:33,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:49:33,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694491269] [2023-12-15 20:49:33,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694491269] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 20:49:33,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 20:49:33,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-15 20:49:33,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439892983] [2023-12-15 20:49:33,291 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 20:49:33,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-15 20:49:33,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:49:33,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-15 20:49:33,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=198, Unknown=1, NotChecked=28, Total=272 [2023-12-15 20:49:33,293 INFO L87 Difference]: Start difference. First operand 420 states and 619 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-15 20:49:51,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-15 20:49:52,899 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-15 20:49:53,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:49:53,640 INFO L93 Difference]: Finished difference Result 864 states and 1274 transitions. [2023-12-15 20:49:53,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-15 20:49:53,640 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) Word has length 175 [2023-12-15 20:49:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:49:53,644 INFO L225 Difference]: With dead ends: 864 [2023-12-15 20:49:53,644 INFO L226 Difference]: Without dead ends: 553 [2023-12-15 20:49:53,645 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=221, Invalid=773, Unknown=2, NotChecked=60, Total=1056 [2023-12-15 20:49:53,646 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 334 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 143 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 789 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2023-12-15 20:49:53,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 789 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 632 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2023-12-15 20:49:53,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2023-12-15 20:49:53,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 460. [2023-12-15 20:49:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 335 states have (on average 1.3850746268656717) internal successors, (464), 335 states have internal predecessors, (464), 108 states have call successors, (108), 16 states have call predecessors, (108), 16 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-15 20:49:53,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 680 transitions. [2023-12-15 20:49:53,681 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 680 transitions. Word has length 175 [2023-12-15 20:49:53,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:49:53,682 INFO L495 AbstractCegarLoop]: Abstraction has 460 states and 680 transitions. [2023-12-15 20:49:53,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 12 states have internal predecessors, (55), 3 states have call successors, (27), 3 states have call predecessors, (27), 5 states have return successors, (27), 3 states have call predecessors, (27), 3 states have call successors, (27) [2023-12-15 20:49:53,682 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 680 transitions. [2023-12-15 20:49:53,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:49:53,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:49:53,684 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:49:53,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-15 20:49:53,889 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 [2023-12-15 20:49:53,890 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:49:53,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:49:53,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1333252690, now seen corresponding path program 1 times [2023-12-15 20:49:53,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:49:53,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262736716] [2023-12-15 20:49:53,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:53,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:49:53,920 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:49:53,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144576521] [2023-12-15 20:49:53,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:49:53,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:49:53,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:49:53,922 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) [2023-12-15 20:49:53,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-15 20:49:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:49:54,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 30 conjunts are in the unsatisfiable core [2023-12-15 20:49:54,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:49:55,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 843 proven. 93 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2023-12-15 20:49:55,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-15 20:50:00,454 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_~var_1_32~0 65536)) (.cse1 (mod c_~var_1_26~0 65536))) (and (or (forall ((v_~var_1_27~0_17 Int)) (or (= v_~var_1_27~0_17 0) (not (= (mod c_~var_1_19~0 v_~var_1_27~0_17) 0)) (< 2147483647 v_~var_1_27~0_17) (< (+ v_~var_1_27~0_17 2147483648) 0))) (< .cse0 .cse1)) (forall ((v_~var_1_27~0_17 Int)) (let ((.cse2 (mod c_~var_1_19~0 v_~var_1_27~0_17))) (or (= v_~var_1_27~0_17 0) (< (+ .cse0 v_~var_1_27~0_17 .cse2) .cse1) (< 2147483647 v_~var_1_27~0_17) (< (+ v_~var_1_27~0_17 2147483648) 0) (< (+ .cse0 .cse2) (+ .cse1 v_~var_1_27~0_17))))) (or (forall ((v_~var_1_27~0_17 Int)) (or (= v_~var_1_27~0_17 0) (< 2147483647 v_~var_1_27~0_17) (< (+ v_~var_1_27~0_17 2147483648) 0) (< (+ .cse0 (mod c_~var_1_19~0 v_~var_1_27~0_17)) .cse1))) (< c_~var_1_19~0 0)))) is different from false [2023-12-15 20:50:00,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:50:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262736716] [2023-12-15 20:50:00,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:50:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144576521] [2023-12-15 20:50:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144576521] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-15 20:50:00,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-15 20:50:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-12-15 20:50:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518295957] [2023-12-15 20:50:00,581 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-15 20:50:00,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-15 20:50:00,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:50:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-15 20:50:00,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=222, Unknown=1, NotChecked=32, Total=342 [2023-12-15 20:50:00,583 INFO L87 Difference]: Start difference. First operand 460 states and 680 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 5 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-12-15 20:50:02,974 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-15 20:50:03,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-15 20:50:03,913 INFO L93 Difference]: Finished difference Result 848 states and 1238 transitions. [2023-12-15 20:50:03,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-12-15 20:50:03,914 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 5 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) Word has length 175 [2023-12-15 20:50:03,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-15 20:50:03,916 INFO L225 Difference]: With dead ends: 848 [2023-12-15 20:50:03,916 INFO L226 Difference]: Without dead ends: 498 [2023-12-15 20:50:03,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 215 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=434, Invalid=1051, Unknown=1, NotChecked=74, Total=1560 [2023-12-15 20:50:03,919 INFO L413 NwaCegarLoop]: 81 mSDtfsCounter, 359 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-12-15 20:50:03,919 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 611 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-12-15 20:50:03,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-12-15 20:50:03,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 382. [2023-12-15 20:50:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 257 states have (on average 1.3268482490272373) internal successors, (341), 257 states have internal predecessors, (341), 108 states have call successors, (108), 16 states have call predecessors, (108), 16 states have return successors, (108), 108 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-15 20:50:03,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 557 transitions. [2023-12-15 20:50:03,956 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 557 transitions. Word has length 175 [2023-12-15 20:50:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-15 20:50:03,956 INFO L495 AbstractCegarLoop]: Abstraction has 382 states and 557 transitions. [2023-12-15 20:50:03,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 5 states have call successors, (27), 5 states have call predecessors, (27), 8 states have return successors, (27), 5 states have call predecessors, (27), 5 states have call successors, (27) [2023-12-15 20:50:03,957 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 557 transitions. [2023-12-15 20:50:03,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-15 20:50:03,958 INFO L187 NwaCegarLoop]: Found error trace [2023-12-15 20:50:03,958 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:50:03,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-15 20:50:04,170 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 [2023-12-15 20:50:04,171 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-15 20:50:04,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-15 20:50:04,171 INFO L85 PathProgramCache]: Analyzing trace with hash 709404462, now seen corresponding path program 1 times [2023-12-15 20:50:04,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-15 20:50:04,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079272917] [2023-12-15 20:50:04,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:50:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-15 20:50:04,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-15 20:50:04,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614688538] [2023-12-15 20:50:04,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-15 20:50:04,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:50:04,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-15 20:50:04,219 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-15 20:50:04,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-15 20:50:04,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-15 20:50:04,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 12 conjunts are in the unsatisfiable core [2023-12-15 20:50:04,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-15 20:50:06,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2023-12-15 20:50:06,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-15 20:50:06,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-15 20:50:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079272917] [2023-12-15 20:50:06,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-15 20:50:06,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614688538] [2023-12-15 20:50:06,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614688538] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-15 20:50:06,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-15 20:50:06,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-15 20:50:06,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643827143] [2023-12-15 20:50:06,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-15 20:50:06,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-15 20:50:06,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-15 20:50:06,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-15 20:50:06,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-15 20:50:06,609 INFO L87 Difference]: Start difference. First operand 382 states and 557 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 states have internal predecessors, (43), 1 states have call successors, (27), 1 states have call predecessors, (27), 1 states have return successors, (27), 1 states have call predecessors, (27), 1 states have call successors, (27) Received shutdown request... [2023-12-15 20:50:07,576 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 20:50:07,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-15 20:50:07,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-12-15 20:50:07,595 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 298 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-15 20:50:07,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [298 Valid, 319 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-15 20:50:07,596 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-15 20:50:07,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-15 20:50:07,611 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-15 20:50:07,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-15 20:50:07,801 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (382states) and FLOYD_HOARE automaton (currently 8 states, 7 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-7-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ∧-6-1 context. [2023-12-15 20:50:07,805 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-12-15 20:50:07,807 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-15 20:50:07,808 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 08:50:07 BoogieIcfgContainer [2023-12-15 20:50:07,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-15 20:50:07,809 INFO L158 Benchmark]: Toolchain (without parser) took 65176.61ms. Allocated memory was 307.2MB in the beginning and 533.7MB in the end (delta: 226.5MB). Free memory was 269.7MB in the beginning and 404.8MB in the end (delta: -135.1MB). Peak memory consumption was 92.0MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,809 INFO L158 Benchmark]: CDTParser took 0.48ms. Allocated memory is still 207.6MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-15 20:50:07,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 372.34ms. Allocated memory is still 307.2MB. Free memory was 269.3MB in the beginning and 251.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,810 INFO L158 Benchmark]: Boogie Procedure Inliner took 66.07ms. Allocated memory is still 307.2MB. Free memory was 251.5MB in the beginning and 245.7MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,810 INFO L158 Benchmark]: Boogie Preprocessor took 88.67ms. Allocated memory is still 307.2MB. Free memory was 245.7MB in the beginning and 235.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,810 INFO L158 Benchmark]: RCFGBuilder took 670.41ms. Allocated memory is still 307.2MB. Free memory was 235.2MB in the beginning and 200.1MB in the end (delta: 35.1MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,811 INFO L158 Benchmark]: TraceAbstraction took 63972.29ms. Allocated memory was 307.2MB in the beginning and 533.7MB in the end (delta: 226.5MB). Free memory was 199.6MB in the beginning and 404.8MB in the end (delta: -205.3MB). Peak memory consumption was 21.8MB. Max. memory is 8.0GB. [2023-12-15 20:50:07,812 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.48ms. Allocated memory is still 207.6MB. Free memory is still 154.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 372.34ms. Allocated memory is still 307.2MB. Free memory was 269.3MB in the beginning and 251.5MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 66.07ms. Allocated memory is still 307.2MB. Free memory was 251.5MB in the beginning and 245.7MB in the end (delta: 5.8MB). Peak memory consumption was 6.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 88.67ms. Allocated memory is still 307.2MB. Free memory was 245.7MB in the beginning and 235.2MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * RCFGBuilder took 670.41ms. Allocated memory is still 307.2MB. Free memory was 235.2MB in the beginning and 200.1MB in the end (delta: 35.1MB). Peak memory consumption was 34.6MB. Max. memory is 8.0GB. * TraceAbstraction took 63972.29ms. Allocated memory was 307.2MB in the beginning and 533.7MB in the end (delta: 226.5MB). Free memory was 199.6MB in the beginning and 404.8MB in the end (delta: -205.3MB). Peak memory consumption was 21.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 19]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 19). Cancelled while NwaCegarLoop was constructing difference of abstraction (382states) and FLOYD_HOARE automaton (currently 8 states, 7 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDA2 was simplifying a ∧-7-1 term,while SimplifyDDA2 was simplifying 3 xjuncts wrt. a ∧-6-1 context. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 84 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 63.9s, OverallIterations: 7, TraceHistogramMax: 27, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 37.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2 mSolverCounterUnknown, 1657 SdHoareTripleChecker+Valid, 20.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1619 mSDsluCounter, 3569 SdHoareTripleChecker+Invalid, 20.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2767 mSDsCounter, 567 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2303 IncrementalHoareTripleChecker+Invalid, 2872 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 567 mSolverCounterUnsat, 802 mSDtfsCounter, 2303 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1400 GetRequests, 1267 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 26.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=460occurred in iteration=5, InterpolantAutomatonStates: 99, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 6 MinimizatonAttempts, 496 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 23.2s InterpolantComputationTime, 1224 NumberOfCodeBlocks, 1224 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 1217 ConstructedInterpolants, 28 QuantifiedInterpolants, 10787 SizeOfPredicates, 52 NumberOfNonLiveVariables, 2958 ConjunctsInSsa, 113 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 9549/9828 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown