/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/array-fpi/eqn1f.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-18 20:59:49,996 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-18 20:59:50,055 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-18 20:59:50,065 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-18 20:59:50,065 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-18 20:59:50,082 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-18 20:59:50,082 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-18 20:59:50,083 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-18 20:59:50,083 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-18 20:59:50,083 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-18 20:59:50,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-18 20:59:50,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-18 20:59:50,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-18 20:59:50,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-18 20:59:50,084 INFO L153 SettingsManager]: * Use SBE=true [2023-12-18 20:59:50,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-18 20:59:50,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-18 20:59:50,085 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-18 20:59:50,085 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-18 20:59:50,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-18 20:59:50,086 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-18 20:59:50,089 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-18 20:59:50,090 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-18 20:59:50,090 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-18 20:59:50,090 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-18 20:59:50,090 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-18 20:59:50,090 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-18 20:59:50,091 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-18 20:59:50,091 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-18 20:59:50,091 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-18 20:59:50,091 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-18 20:59:50,091 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-18 20:59:50,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:59:50,092 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-18 20:59:50,092 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-18 20:59:50,092 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-18 20:59:50,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-18 20:59:50,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-18 20:59:50,093 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-18 20:59:50,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-18 20:59:50,093 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-18 20:59:50,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-18 20:59:50,094 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-18 20:59:50,094 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-18 20:59:50,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-18 20:59:50,308 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-18 20:59:50,309 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-18 20:59:50,311 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-18 20:59:50,311 INFO L274 PluginConnector]: CDTParser initialized [2023-12-18 20:59:50,312 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/eqn1f.c [2023-12-18 20:59:51,427 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-18 20:59:51,565 INFO L384 CDTParser]: Found 1 translation units. [2023-12-18 20:59:51,566 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c [2023-12-18 20:59:51,570 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d257daf82/5fe0373e14f845fd80af1eebaa4d4ae9/FLAG742c3b9db [2023-12-18 20:59:51,579 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d257daf82/5fe0373e14f845fd80af1eebaa4d4ae9 [2023-12-18 20:59:51,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-18 20:59:51,581 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-18 20:59:51,582 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-18 20:59:51,582 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-18 20:59:51,585 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-18 20:59:51,585 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,586 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b043ef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51, skipping insertion in model container [2023-12-18 20:59:51,586 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,599 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-18 20:59:51,709 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c[588,601] [2023-12-18 20:59:51,728 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:59:51,736 INFO L202 MainTranslator]: Completed pre-run [2023-12-18 20:59:51,744 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/eqn1f.c[588,601] [2023-12-18 20:59:51,748 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-18 20:59:51,757 INFO L206 MainTranslator]: Completed translation [2023-12-18 20:59:51,758 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51 WrapperNode [2023-12-18 20:59:51,758 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-18 20:59:51,758 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-18 20:59:51,758 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-18 20:59:51,759 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-18 20:59:51,763 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,768 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,787 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 80 [2023-12-18 20:59:51,788 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-18 20:59:51,788 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-18 20:59:51,788 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-18 20:59:51,788 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-18 20:59:51,797 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,797 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,799 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,808 INFO L175 MemorySlicer]: Split 18 memory accesses to 4 slices as follows [2, 4, 8, 4]. 44 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 0, 8, 0]. The 4 writes are split as follows [0, 2, 0, 2]. [2023-12-18 20:59:51,808 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,808 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,812 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,815 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,816 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,817 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-18 20:59:51,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-18 20:59:51,818 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-18 20:59:51,818 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-18 20:59:51,818 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (1/1) ... [2023-12-18 20:59:51,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-18 20:59:51,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:51,845 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) [2023-12-18 20:59:51,857 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 [2023-12-18 20:59:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-18 20:59:51,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-18 20:59:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-18 20:59:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-18 20:59:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-18 20:59:51,878 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-18 20:59:51,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-18 20:59:51,879 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-18 20:59:51,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-18 20:59:51,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-18 20:59:51,955 INFO L241 CfgBuilder]: Building ICFG [2023-12-18 20:59:51,957 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-18 20:59:52,127 INFO L282 CfgBuilder]: Performing block encoding [2023-12-18 20:59:52,145 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-18 20:59:52,146 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-18 20:59:52,146 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:59:52 BoogieIcfgContainer [2023-12-18 20:59:52,146 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-18 20:59:52,148 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-18 20:59:52,148 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-18 20:59:52,151 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-18 20:59:52,151 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.12 08:59:51" (1/3) ... [2023-12-18 20:59:52,151 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22309bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:59:52, skipping insertion in model container [2023-12-18 20:59:52,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.12 08:59:51" (2/3) ... [2023-12-18 20:59:52,152 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22309bf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.12 08:59:52, skipping insertion in model container [2023-12-18 20:59:52,152 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.12 08:59:52" (3/3) ... [2023-12-18 20:59:52,153 INFO L112 eAbstractionObserver]: Analyzing ICFG eqn1f.c [2023-12-18 20:59:52,164 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-18 20:59:52,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-18 20:59:52,197 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-18 20:59:52,201 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;@53779f55, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-18 20:59:52,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-18 20:59:52,204 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 20:59:52,208 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:52,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:52,209 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:52,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:52,212 INFO L85 PathProgramCache]: Analyzing trace with hash 955298750, now seen corresponding path program 1 times [2023-12-18 20:59:52,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:52,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171794366] [2023-12-18 20:59:52,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:52,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:52,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:52,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:52,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171794366] [2023-12-18 20:59:52,313 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-18 20:59:52,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356998146] [2023-12-18 20:59:52,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:52,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:52,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:52,317 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) [2023-12-18 20:59:52,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-18 20:59:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:52,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-18 20:59:52,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:52,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:52,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:59:52,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356998146] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:59:52,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:59:52,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-18 20:59:52,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975774841] [2023-12-18 20:59:52,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:59:52,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-18 20:59:52,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:52,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-18 20:59:52,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 20:59:52,415 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:52,443 INFO L93 Difference]: Finished difference Result 29 states and 43 transitions. [2023-12-18 20:59:52,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-18 20:59:52,444 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-18 20:59:52,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:52,448 INFO L225 Difference]: With dead ends: 29 [2023-12-18 20:59:52,449 INFO L226 Difference]: Without dead ends: 13 [2023-12-18 20:59:52,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-18 20:59:52,455 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:52,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-18 20:59:52,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-18 20:59:52,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2023-12-18 20:59:52,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 11 [2023-12-18 20:59:52,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:52,493 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2023-12-18 20:59:52,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,494 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2023-12-18 20:59:52,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-18 20:59:52,495 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:52,495 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:52,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:52,700 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 [2023-12-18 20:59:52,701 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:52,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:52,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1635357120, now seen corresponding path program 1 times [2023-12-18 20:59:52,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:52,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505264867] [2023-12-18 20:59:52,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:52,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:52,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:52,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710180947] [2023-12-18 20:59:52,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:52,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:52,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:52,723 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) [2023-12-18 20:59:52,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-18 20:59:52,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:52,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2023-12-18 20:59:52,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:52,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:59:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:52,911 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:59:52,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505264867] [2023-12-18 20:59:52,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:52,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710180947] [2023-12-18 20:59:52,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710180947] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:59:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:59:52,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 20:59:52,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605229463] [2023-12-18 20:59:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:59:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:59:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:59:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:59:52,914 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:52,963 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2023-12-18 20:59:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-18 20:59:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-12-18 20:59:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:52,965 INFO L225 Difference]: With dead ends: 25 [2023-12-18 20:59:52,965 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 20:59:52,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-12-18 20:59:52,967 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 12 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:52,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 30 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 20:59:52,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 17. [2023-12-18 20:59:52,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2023-12-18 20:59:52,976 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 11 [2023-12-18 20:59:52,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:52,978 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2023-12-18 20:59:52,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2023-12-18 20:59:52,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-12-18 20:59:52,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:52,980 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:52,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:53,187 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 [2023-12-18 20:59:53,188 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:53,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:53,188 INFO L85 PathProgramCache]: Analyzing trace with hash 265370671, now seen corresponding path program 1 times [2023-12-18 20:59:53,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:53,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199950831] [2023-12-18 20:59:53,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:53,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:53,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [326343131] [2023-12-18 20:59:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:53,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:53,210 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) [2023-12-18 20:59:53,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-18 20:59:53,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:53,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-18 20:59:53,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:53,302 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:59:53,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:53,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199950831] [2023-12-18 20:59:53,302 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:53,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326343131] [2023-12-18 20:59:53,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326343131] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:59:53,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:59:53,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-18 20:59:53,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798959958] [2023-12-18 20:59:53,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:59:53,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-18 20:59:53,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:53,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-18 20:59:53,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-18 20:59:53,304 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:53,346 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2023-12-18 20:59:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 20:59:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-12-18 20:59:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:53,347 INFO L225 Difference]: With dead ends: 38 [2023-12-18 20:59:53,347 INFO L226 Difference]: Without dead ends: 31 [2023-12-18 20:59:53,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-12-18 20:59:53,348 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:53,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:53,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-18 20:59:53,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 20. [2023-12-18 20:59:53,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2023-12-18 20:59:53,352 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 12 [2023-12-18 20:59:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:53,353 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2023-12-18 20:59:53,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2023-12-18 20:59:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-12-18 20:59:53,353 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:53,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:53,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:53,558 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 [2023-12-18 20:59:53,559 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:53,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -1093428625, now seen corresponding path program 1 times [2023-12-18 20:59:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:53,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30319410] [2023-12-18 20:59:53,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:53,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:53,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:53,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351702222] [2023-12-18 20:59:53,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:53,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:53,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:53,591 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) [2023-12-18 20:59:53,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-18 20:59:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:53,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-18 20:59:53,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:53,656 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:59:53,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:59:53,711 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 20:59:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:59:53,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:59:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:59:53,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:53,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30319410] [2023-12-18 20:59:53,849 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:53,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351702222] [2023-12-18 20:59:53,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351702222] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:59:53,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:59:53,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-12-18 20:59:53,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366310485] [2023-12-18 20:59:53,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:59:53,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-18 20:59:53,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:53,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-18 20:59:53,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-12-18 20:59:53,852 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:53,907 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-12-18 20:59:53,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-18 20:59:53,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-12-18 20:59:53,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:53,909 INFO L225 Difference]: With dead ends: 25 [2023-12-18 20:59:53,909 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 20:59:53,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-12-18 20:59:53,912 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 19 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:53,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:53,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 20:59:53,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2023-12-18 20:59:53,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-12-18 20:59:53,919 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2023-12-18 20:59:53,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:53,919 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-12-18 20:59:53,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:53,919 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-12-18 20:59:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-12-18 20:59:53,919 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:53,920 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:53,927 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:54,127 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 [2023-12-18 20:59:54,128 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:54,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:54,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1115156774, now seen corresponding path program 1 times [2023-12-18 20:59:54,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:54,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868030357] [2023-12-18 20:59:54,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:54,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:54,148 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:54,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712067458] [2023-12-18 20:59:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:54,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:54,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:54,154 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) [2023-12-18 20:59:54,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-18 20:59:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:54,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-18 20:59:54,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:54,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:54,244 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-18 20:59:54,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:54,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868030357] [2023-12-18 20:59:54,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:54,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712067458] [2023-12-18 20:59:54,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712067458] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-18 20:59:54,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-18 20:59:54,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-18 20:59:54,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478846528] [2023-12-18 20:59:54,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-18 20:59:54,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-18 20:59:54,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:54,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-18 20:59:54,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-12-18 20:59:54,246 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:54,284 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2023-12-18 20:59:54,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-18 20:59:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-12-18 20:59:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:54,285 INFO L225 Difference]: With dead ends: 31 [2023-12-18 20:59:54,285 INFO L226 Difference]: Without dead ends: 18 [2023-12-18 20:59:54,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-12-18 20:59:54,286 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 8 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:54,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 20 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:54,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2023-12-18 20:59:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2023-12-18 20:59:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2023-12-18 20:59:54,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2023-12-18 20:59:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:54,288 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2023-12-18 20:59:54,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:54,288 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2023-12-18 20:59:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-18 20:59:54,289 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:54,289 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:54,295 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:54,493 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 [2023-12-18 20:59:54,494 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:54,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:54,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1294961129, now seen corresponding path program 1 times [2023-12-18 20:59:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:54,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218056882] [2023-12-18 20:59:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:54,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:54,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:54,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315225385] [2023-12-18 20:59:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:54,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:54,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:54,524 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) [2023-12-18 20:59:54,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-18 20:59:54,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-18 20:59:54,583 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2023-12-18 20:59:54,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:54,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:59:54,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-12-18 20:59:54,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-12-18 20:59:54,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2023-12-18 20:59:54,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-12-18 20:59:54,742 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:54,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:59:54,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-18 20:59:54,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:54,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218056882] [2023-12-18 20:59:54,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:54,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315225385] [2023-12-18 20:59:54,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315225385] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:59:54,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:59:54,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-12-18 20:59:54,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608494719] [2023-12-18 20:59:54,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:59:54,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-18 20:59:54,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:54,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-18 20:59:54,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-18 20:59:54,875 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:55,057 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2023-12-18 20:59:55,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 20:59:55,058 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-12-18 20:59:55,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:55,059 INFO L225 Difference]: With dead ends: 23 [2023-12-18 20:59:55,059 INFO L226 Difference]: Without dead ends: 21 [2023-12-18 20:59:55,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2023-12-18 20:59:55,060 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 38 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:55,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 38 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-18 20:59:55,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-18 20:59:55,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2023-12-18 20:59:55,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-12-18 20:59:55,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2023-12-18 20:59:55,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:55,064 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-12-18 20:59:55,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,064 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-12-18 20:59:55,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-12-18 20:59:55,065 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:55,065 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:55,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:55,265 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 [2023-12-18 20:59:55,266 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:55,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:55,266 INFO L85 PathProgramCache]: Analyzing trace with hash -785507985, now seen corresponding path program 2 times [2023-12-18 20:59:55,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:55,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416359997] [2023-12-18 20:59:55,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:55,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:55,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:55,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [970451333] [2023-12-18 20:59:55,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-18 20:59:55,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:55,288 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) [2023-12-18 20:59:55,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-18 20:59:55,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-18 20:59:55,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-18 20:59:55,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-18 20:59:55,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-18 20:59:55,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:59:55,398 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-18 20:59:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-18 20:59:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-18 20:59:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416359997] [2023-12-18 20:59:55,437 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-18 20:59:55,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970451333] [2023-12-18 20:59:55,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970451333] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-18 20:59:55,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-18 20:59:55,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2023-12-18 20:59:55,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854811363] [2023-12-18 20:59:55,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-18 20:59:55,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-18 20:59:55,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-18 20:59:55,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-18 20:59:55,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-12-18 20:59:55,439 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-18 20:59:55,521 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-12-18 20:59:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-18 20:59:55,522 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-12-18 20:59:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-18 20:59:55,522 INFO L225 Difference]: With dead ends: 47 [2023-12-18 20:59:55,522 INFO L226 Difference]: Without dead ends: 23 [2023-12-18 20:59:55,522 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2023-12-18 20:59:55,523 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 12 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-18 20:59:55,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 42 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-18 20:59:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-12-18 20:59:55,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-12-18 20:59:55,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-12-18 20:59:55,527 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 19 [2023-12-18 20:59:55,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-18 20:59:55,527 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-12-18 20:59:55,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-18 20:59:55,527 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-12-18 20:59:55,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-18 20:59:55,528 INFO L187 NwaCegarLoop]: Found error trace [2023-12-18 20:59:55,528 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-18 20:59:55,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:55,732 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 [2023-12-18 20:59:55,734 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-18 20:59:55,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-18 20:59:55,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1124717088, now seen corresponding path program 3 times [2023-12-18 20:59:55,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-18 20:59:55,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088690409] [2023-12-18 20:59:55,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-18 20:59:55,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-18 20:59:55,748 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-18 20:59:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [359783453] [2023-12-18 20:59:55,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-18 20:59:55,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-18 20:59:55,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-18 20:59:55,749 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-18 20:59:55,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-18 20:59:55,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-18 20:59:55,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-18 20:59:55,826 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-18 20:59:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-18 20:59:55,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-18 20:59:55,872 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-18 20:59:55,873 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-18 20:59:55,893 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-18 20:59:56,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-18 20:59:56,097 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2023-12-18 20:59:56,100 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-18 20:59:56,125 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.12 08:59:56 BoogieIcfgContainer [2023-12-18 20:59:56,125 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-18 20:59:56,126 INFO L158 Benchmark]: Toolchain (without parser) took 4544.54ms. Allocated memory was 202.4MB in the beginning and 273.7MB in the end (delta: 71.3MB). Free memory was 159.1MB in the beginning and 185.5MB in the end (delta: -26.5MB). Peak memory consumption was 45.2MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,126 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 149.0MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-18 20:59:56,126 INFO L158 Benchmark]: CACSL2BoogieTranslator took 175.80ms. Allocated memory is still 202.4MB. Free memory was 159.1MB in the beginning and 147.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,126 INFO L158 Benchmark]: Boogie Procedure Inliner took 29.29ms. Allocated memory is still 202.4MB. Free memory was 147.5MB in the beginning and 146.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,126 INFO L158 Benchmark]: Boogie Preprocessor took 28.99ms. Allocated memory is still 202.4MB. Free memory was 146.1MB in the beginning and 144.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,127 INFO L158 Benchmark]: RCFGBuilder took 328.38ms. Allocated memory is still 202.4MB. Free memory was 144.0MB in the beginning and 130.7MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,127 INFO L158 Benchmark]: TraceAbstraction took 3977.83ms. Allocated memory was 202.4MB in the beginning and 273.7MB in the end (delta: 71.3MB). Free memory was 130.1MB in the beginning and 185.5MB in the end (delta: -55.5MB). Peak memory consumption was 16.9MB. Max. memory is 8.0GB. [2023-12-18 20:59:56,128 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 149.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 175.80ms. Allocated memory is still 202.4MB. Free memory was 159.1MB in the beginning and 147.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 29.29ms. Allocated memory is still 202.4MB. Free memory was 147.5MB in the beginning and 146.1MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 28.99ms. Allocated memory is still 202.4MB. Free memory was 146.1MB in the beginning and 144.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 328.38ms. Allocated memory is still 202.4MB. Free memory was 144.0MB in the beginning and 130.7MB in the end (delta: 13.3MB). Peak memory consumption was 13.6MB. Max. memory is 8.0GB. * TraceAbstraction took 3977.83ms. Allocated memory was 202.4MB in the beginning and 273.7MB in the end (delta: 71.3MB). Free memory was 130.1MB in the beginning and 185.5MB in the end (delta: -55.5MB). Peak memory consumption was 16.9MB. 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 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int N; [L23] N = __VERIFIER_nondet_int() [L24] COND FALSE !(N <= 0) [L25] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L13] COND FALSE !(!cond) VAL [N=3, \old(cond)=1, cond=1] [L25] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L27] int i; [L28] long long *a = malloc(sizeof(long long)*N); [L29] long long *b = malloc(sizeof(long long)*N); [L31] a[0] = 2 [L32] b[0] = 1 [L33] i=1 VAL [N=3, a={-1:0}, b={-2:0}, i=1] [L33] COND TRUE i