/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-16 05:54:35,007 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-16 05:54:35,069 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-16 05:54:35,074 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-16 05:54:35,074 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-16 05:54:35,094 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-16 05:54:35,094 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-16 05:54:35,095 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-16 05:54:35,095 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-16 05:54:35,098 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-16 05:54:35,098 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-16 05:54:35,098 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-16 05:54:35,098 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-16 05:54:35,099 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-16 05:54:35,099 INFO L153 SettingsManager]: * Use SBE=true [2023-12-16 05:54:35,099 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-16 05:54:35,100 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-16 05:54:35,101 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-16 05:54:35,102 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-16 05:54:35,102 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:54:35,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-16 05:54:35,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-16 05:54:35,104 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-16 05:54:35,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-16 05:54:35,290 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-16 05:54:35,292 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-16 05:54:35,293 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-16 05:54:35,293 INFO L274 PluginConnector]: CDTParser initialized [2023-12-16 05:54:35,294 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps3-ll.c [2023-12-16 05:54:36,291 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-16 05:54:36,426 INFO L384 CDTParser]: Found 1 translation units. [2023-12-16 05:54:36,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps3-ll.c [2023-12-16 05:54:36,431 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4730b17f6/f2d66542e87e42d48a329e639777f7f0/FLAG0d53ee4d4 [2023-12-16 05:54:36,442 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4730b17f6/f2d66542e87e42d48a329e639777f7f0 [2023-12-16 05:54:36,444 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-16 05:54:36,444 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-16 05:54:36,445 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-16 05:54:36,445 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-16 05:54:36,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-16 05:54:36,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e8385c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36, skipping insertion in model container [2023-12-16 05:54:36,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,468 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-16 05:54:36,584 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2023-12-16 05:54:36,607 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:54:36,615 INFO L202 MainTranslator]: Completed pre-run [2023-12-16 05:54:36,625 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps3-ll.c[987,1000] [2023-12-16 05:54:36,642 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-16 05:54:36,651 INFO L206 MainTranslator]: Completed translation [2023-12-16 05:54:36,652 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36 WrapperNode [2023-12-16 05:54:36,652 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-16 05:54:36,653 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-16 05:54:36,653 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-16 05:54:36,653 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-16 05:54:36,658 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,670 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,681 INFO L138 Inliner]: procedures = 16, calls = 51, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 54 [2023-12-16 05:54:36,681 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-16 05:54:36,681 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-16 05:54:36,681 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-16 05:54:36,682 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-16 05:54:36,688 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,688 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,690 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,710 INFO L175 MemorySlicer]: Split 30 memory accesses to 5 slices as follows [2, 2, 17, 5, 4]. 57 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0, 0]. The 7 writes are split as follows [0, 1, 2, 2, 2]. [2023-12-16 05:54:36,711 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,711 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,715 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,716 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,716 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,717 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,719 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-16 05:54:36,719 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-16 05:54:36,719 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-16 05:54:36,719 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-16 05:54:36,720 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (1/1) ... [2023-12-16 05:54:36,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-16 05:54:36,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:36,753 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-16 05:54:36,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-16 05:54:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-16 05:54:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-16 05:54:36,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-16 05:54:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-16 05:54:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-16 05:54:36,777 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-16 05:54:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-16 05:54:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-16 05:54:36,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-16 05:54:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-12-16 05:54:36,779 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-12-16 05:54:36,779 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-16 05:54:36,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-16 05:54:36,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-16 05:54:36,867 INFO L241 CfgBuilder]: Building ICFG [2023-12-16 05:54:36,868 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-16 05:54:36,996 INFO L282 CfgBuilder]: Performing block encoding [2023-12-16 05:54:37,013 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-16 05:54:37,013 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-16 05:54:37,013 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:37 BoogieIcfgContainer [2023-12-16 05:54:37,013 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-16 05:54:37,015 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-16 05:54:37,015 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-16 05:54:37,017 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-16 05:54:37,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 05:54:36" (1/3) ... [2023-12-16 05:54:37,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773de6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:37, skipping insertion in model container [2023-12-16 05:54:37,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 05:54:36" (2/3) ... [2023-12-16 05:54:37,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@773de6d1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 05:54:37, skipping insertion in model container [2023-12-16 05:54:37,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 05:54:37" (3/3) ... [2023-12-16 05:54:37,018 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps3-ll.c [2023-12-16 05:54:37,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-16 05:54:37,030 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-16 05:54:37,056 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-16 05:54:37,060 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;@47466e84, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-16 05:54:37,060 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-16 05:54:37,063 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:54:37,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-16 05:54:37,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:37,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:37,068 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:37,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:37,071 INFO L85 PathProgramCache]: Analyzing trace with hash -248335761, now seen corresponding path program 1 times [2023-12-16 05:54:37,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:37,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301049926] [2023-12-16 05:54:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:37,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:37,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:37,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467008224] [2023-12-16 05:54:37,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:37,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:37,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:37,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:37,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-16 05:54:37,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:37,296 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-16 05:54:37,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:37,359 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 [2023-12-16 05:54:37,368 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 [2023-12-16 05:54:37,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:54:37,524 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:54:37,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301049926] [2023-12-16 05:54:37,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:37,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467008224] [2023-12-16 05:54:37,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467008224] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:54:37,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:54:37,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-16 05:54:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258740193] [2023-12-16 05:54:37,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:54:37,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-16 05:54:37,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:37,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-16 05:54:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-16 05:54:37,552 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:54:37,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:37,717 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2023-12-16 05:54:37,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-16 05:54:37,719 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-16 05:54:37,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:37,723 INFO L225 Difference]: With dead ends: 52 [2023-12-16 05:54:37,723 INFO L226 Difference]: Without dead ends: 31 [2023-12-16 05:54:37,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-16 05:54:37,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:37,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 72 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:54:37,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-16 05:54:37,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-12-16 05:54:37,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2023-12-16 05:54:37,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-12-16 05:54:37,750 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 8 [2023-12-16 05:54:37,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:37,751 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-12-16 05:54:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-16 05:54:37,751 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-12-16 05:54:37,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 05:54:37,752 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:37,752 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:37,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-16 05:54:37,956 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 [2023-12-16 05:54:37,957 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:37,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:37,957 INFO L85 PathProgramCache]: Analyzing trace with hash -2110697342, now seen corresponding path program 1 times [2023-12-16 05:54:37,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:37,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709316156] [2023-12-16 05:54:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:37,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:37,996 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [637295955] [2023-12-16 05:54:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:37,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:37,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:38,004 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:38,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-16 05:54:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:38,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 76 conjunts are in the unsatisfiable core [2023-12-16 05:54:38,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:38,122 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 [2023-12-16 05:54:38,126 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 [2023-12-16 05:54:38,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2023-12-16 05:54:38,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:54:38,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-16 05:54:38,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709316156] [2023-12-16 05:54:38,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:38,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637295955] [2023-12-16 05:54:38,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637295955] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-16 05:54:38,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-16 05:54:38,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2023-12-16 05:54:38,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489015784] [2023-12-16 05:54:38,515 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:38,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-16 05:54:38,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:38,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-16 05:54:38,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2023-12-16 05:54:38,517 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:54:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:38,865 INFO L93 Difference]: Finished difference Result 57 states and 62 transitions. [2023-12-16 05:54:38,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-16 05:54:38,865 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-16 05:54:38,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:38,867 INFO L225 Difference]: With dead ends: 57 [2023-12-16 05:54:38,867 INFO L226 Difference]: Without dead ends: 51 [2023-12-16 05:54:38,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-12-16 05:54:38,869 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:38,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 104 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-16 05:54:38,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-16 05:54:38,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2023-12-16 05:54:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2023-12-16 05:54:38,889 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 18 [2023-12-16 05:54:38,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:38,889 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2023-12-16 05:54:38,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:54:38,890 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2023-12-16 05:54:38,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-16 05:54:38,890 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:38,890 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:38,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:39,095 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 [2023-12-16 05:54:39,096 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:39,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:39,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1884088945, now seen corresponding path program 1 times [2023-12-16 05:54:39,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:39,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310487429] [2023-12-16 05:54:39,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:39,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:39,113 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:39,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1041771251] [2023-12-16 05:54:39,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:39,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:39,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:39,116 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:39,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-16 05:54:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:39,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-16 05:54:39,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:39,192 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 [2023-12-16 05:54:39,195 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 [2023-12-16 05:54:39,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-16 05:54:39,252 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-16 05:54:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310487429] [2023-12-16 05:54:39,253 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:39,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041771251] [2023-12-16 05:54:39,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041771251] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-16 05:54:39,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-16 05:54:39,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-16 05:54:39,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078769772] [2023-12-16 05:54:39,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-16 05:54:39,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-16 05:54:39,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:39,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-16 05:54:39,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-16 05:54:39,255 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:54:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:54:39,330 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-12-16 05:54:39,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-16 05:54:39,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-16 05:54:39,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:54:39,331 INFO L225 Difference]: With dead ends: 51 [2023-12-16 05:54:39,331 INFO L226 Difference]: Without dead ends: 43 [2023-12-16 05:54:39,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-12-16 05:54:39,332 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-16 05:54:39,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 40 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-16 05:54:39,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-16 05:54:39,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-16 05:54:39,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 7 states have call successors, (7), 6 states have call predecessors, (7), 7 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-16 05:54:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-12-16 05:54:39,340 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 18 [2023-12-16 05:54:39,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:54:39,340 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-12-16 05:54:39,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-16 05:54:39,340 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-12-16 05:54:39,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-16 05:54:39,341 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:54:39,341 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:54:39,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-16 05:54:39,547 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 [2023-12-16 05:54:39,548 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:54:39,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:54:39,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1821742097, now seen corresponding path program 1 times [2023-12-16 05:54:39,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:54:39,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757990252] [2023-12-16 05:54:39,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:39,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:54:39,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:54:39,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1174384127] [2023-12-16 05:54:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:54:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:54:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:54:39,586 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:54:39,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-16 05:54:39,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-16 05:54:39,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 98 conjunts are in the unsatisfiable core [2023-12-16 05:54:39,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:54:39,764 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 [2023-12-16 05:54:39,769 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 [2023-12-16 05:54:40,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:40,081 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:54:40,167 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-16 05:54:40,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:54:46,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 84 [2023-12-16 05:54:46,545 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 36 [2023-12-16 05:54:52,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-16 05:54:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757990252] [2023-12-16 05:54:52,578 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-16 05:54:52,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174384127] [2023-12-16 05:54:52,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174384127] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-16 05:54:52,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-16 05:54:52,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-16 05:54:52,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460885401] [2023-12-16 05:54:52,578 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-16 05:54:52,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-16 05:54:52,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-16 05:54:52,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-16 05:54:52,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=438, Unknown=2, NotChecked=0, Total=506 [2023-12-16 05:54:52,579 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 15 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:54:56,909 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-16 05:55:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-16 05:55:02,254 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-16 05:55:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-16 05:55:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-12-16 05:55:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-16 05:55:02,255 INFO L225 Difference]: With dead ends: 49 [2023-12-16 05:55:02,255 INFO L226 Difference]: Without dead ends: 39 [2023-12-16 05:55:02,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=126, Invalid=802, Unknown=2, NotChecked=0, Total=930 [2023-12-16 05:55:02,256 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-12-16 05:55:02,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 51 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 193 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2023-12-16 05:55:02,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-12-16 05:55:02,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2023-12-16 05:55:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-16 05:55:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2023-12-16 05:55:02,263 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2023-12-16 05:55:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-16 05:55:02,263 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2023-12-16 05:55:02,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-16 05:55:02,263 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2023-12-16 05:55:02,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-16 05:55:02,264 INFO L187 NwaCegarLoop]: Found error trace [2023-12-16 05:55:02,264 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-16 05:55:02,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-16 05:55:02,468 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 [2023-12-16 05:55:02,468 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-16 05:55:02,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-16 05:55:02,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2029722161, now seen corresponding path program 2 times [2023-12-16 05:55:02,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-16 05:55:02,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116141620] [2023-12-16 05:55:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-16 05:55:02,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-16 05:55:02,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-16 05:55:02,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147108616] [2023-12-16 05:55:02,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-16 05:55:02,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-16 05:55:02,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-16 05:55:02,490 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-16 05:55:02,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-16 05:55:02,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-16 05:55:02,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-16 05:55:02,634 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 131 conjunts are in the unsatisfiable core [2023-12-16 05:55:02,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-16 05:55:02,642 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 [2023-12-16 05:55:02,843 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 61 [2023-12-16 05:55:11,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-16 05:55:11,294 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 15 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-16 05:55:11,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-16 05:55:17,479 WARN L293 SmtUtils]: Spent 5.76s on a formula simplification that was a NOOP. DAG size: 113 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-16 05:55:36,194 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-16 05:55:36,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 344 treesize of output 343 [2023-12-16 05:55:44,274 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse3 (select .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse0 (+ (* 3 .cse3 .cse3) .cse3 (* 2 .cse3 .cse3 .cse3)))) (or (not (= (mod .cse0 6) 0)) (and (= (let ((.cse1 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse3 1))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ .cse1 (* 2 (* .cse1 .cse1 .cse1)) (* (* .cse1 .cse1) 3))) (+ (* (* .cse3 .cse3) 6) (* .cse3 12) (* (div .cse0 6) 6) 6)) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)))))) is different from false Received shutdown request... [2023-12-16 05:55:54,870 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:55:54,880 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-16 05:55:55,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-16 05:55:56,081 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-16 05:55:56,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-16 05:55:56,088 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-16 05:55:56,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-12-16 05:55:56,088 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 43 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while executing Executor. [2023-12-16 05:55:56,091 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1] [2023-12-16 05:55:56,093 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-16 05:55:56,098 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 05:55:56 BoogieIcfgContainer [2023-12-16 05:55:56,098 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-16 05:55:56,098 INFO L158 Benchmark]: Toolchain (without parser) took 79653.71ms. Allocated memory was 332.4MB in the beginning and 399.5MB in the end (delta: 67.1MB). Free memory was 279.4MB in the beginning and 297.0MB in the end (delta: -17.6MB). Peak memory consumption was 50.3MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,098 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 238.0MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-16 05:55:56,098 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.23ms. Allocated memory is still 332.4MB. Free memory was 279.0MB in the beginning and 267.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,099 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.08ms. Allocated memory is still 332.4MB. Free memory was 267.4MB in the beginning and 265.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,101 INFO L158 Benchmark]: Boogie Preprocessor took 37.33ms. Allocated memory is still 332.4MB. Free memory was 265.7MB in the beginning and 263.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,101 INFO L158 Benchmark]: RCFGBuilder took 294.08ms. Allocated memory is still 332.4MB. Free memory was 263.6MB in the beginning and 249.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,101 INFO L158 Benchmark]: TraceAbstraction took 79083.15ms. Allocated memory was 332.4MB in the beginning and 399.5MB in the end (delta: 67.1MB). Free memory was 248.3MB in the beginning and 297.0MB in the end (delta: -48.7MB). Peak memory consumption was 19.9MB. Max. memory is 8.0GB. [2023-12-16 05:55:56,104 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 238.0MB. Free memory is still 186.3MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 207.23ms. Allocated memory is still 332.4MB. Free memory was 279.0MB in the beginning and 267.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.08ms. Allocated memory is still 332.4MB. Free memory was 267.4MB in the beginning and 265.7MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 37.33ms. Allocated memory is still 332.4MB. Free memory was 265.7MB in the beginning and 263.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 294.08ms. Allocated memory is still 332.4MB. Free memory was 263.6MB in the beginning and 249.0MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 79083.15ms. Allocated memory was 332.4MB in the beginning and 399.5MB in the end (delta: 67.1MB). Free memory was 248.3MB in the beginning and 297.0MB in the end (delta: -48.7MB). Peak memory consumption was 19.9MB. 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 - TimeoutResultAtElement [Line: 37]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 37). Cancelled while NwaCegarLoop was analyzing trace of length 43 with TraceHistMax 4,while TraceCheckSpWp was constructing backward predicates,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 79.0s, OverallIterations: 5, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 10.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 102 SdHoareTripleChecker+Valid, 4.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 101 mSDsluCounter, 267 SdHoareTripleChecker+Invalid, 4.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 223 mSDsCounter, 35 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 491 IncrementalHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 35 mSolverCounterUnsat, 44 mSDtfsCounter, 491 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 17.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=2, InterpolantAutomatonStates: 50, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 10 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 13.5s InterpolantComputationTime, 74 NumberOfCodeBlocks, 74 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 87 ConstructedInterpolants, 4 QuantifiedInterpolants, 1626 SizeOfPredicates, 70 NumberOfNonLiveVariables, 786 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 14/27 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown