/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/recursified_nla-digbench/recursified_ps5-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-20 00:31:44,170 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-20 00:31:44,235 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-20 00:31:44,239 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-20 00:31:44,240 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-20 00:31:44,261 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-20 00:31:44,261 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-20 00:31:44,261 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-20 00:31:44,262 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-20 00:31:44,264 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-20 00:31:44,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-20 00:31:44,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-20 00:31:44,265 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-20 00:31:44,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * Use SBE=true [2023-12-20 00:31:44,267 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-20 00:31:44,267 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-20 00:31:44,268 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-20 00:31:44,269 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-20 00:31:44,269 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-20 00:31:44,269 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-20 00:31:44,270 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-20 00:31:44,270 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-20 00:31:44,270 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:31:44,270 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-20 00:31:44,270 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-20 00:31:44,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-20 00:31:44,271 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-20 00:31:44,271 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-20 00:31:44,446 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-20 00:31:44,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-20 00:31:44,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-20 00:31:44,463 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-20 00:31:44,463 INFO L274 PluginConnector]: CDTParser initialized [2023-12-20 00:31:44,464 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps5-ll.c [2023-12-20 00:31:45,457 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-20 00:31:45,609 INFO L384 CDTParser]: Found 1 translation units. [2023-12-20 00:31:45,610 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps5-ll.c [2023-12-20 00:31:45,620 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95173a66/00b4e6cdcca54d62b5513102b21b1404/FLAGa8a63c00c [2023-12-20 00:31:45,631 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c95173a66/00b4e6cdcca54d62b5513102b21b1404 [2023-12-20 00:31:45,633 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-20 00:31:45,634 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-20 00:31:45,635 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-20 00:31:45,636 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-20 00:31:45,645 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-20 00:31:45,646 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,646 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cd22b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45, skipping insertion in model container [2023-12-20 00:31:45,646 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,665 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-20 00:31:45,776 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_ps5-ll.c[987,1000] [2023-12-20 00:31:45,788 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:31:45,794 INFO L202 MainTranslator]: Completed pre-run [2023-12-20 00:31:45,802 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_ps5-ll.c[987,1000] [2023-12-20 00:31:45,811 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-20 00:31:45,820 INFO L206 MainTranslator]: Completed translation [2023-12-20 00:31:45,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45 WrapperNode [2023-12-20 00:31:45,820 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-20 00:31:45,821 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-20 00:31:45,821 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-20 00:31:45,821 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-20 00:31:45,826 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,848 INFO L138 Inliner]: procedures = 16, calls = 74, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 83 [2023-12-20 00:31:45,849 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-20 00:31:45,849 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-20 00:31:45,849 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-20 00:31:45,849 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-20 00:31:45,856 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,856 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,858 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,868 INFO L175 MemorySlicer]: Split 51 memory accesses to 5 slices as follows [2, 4, 5, 36, 4]. 71 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, 2, 2, 2, 1]. [2023-12-20 00:31:45,868 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,868 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,872 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,873 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,874 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,874 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,884 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-20 00:31:45,885 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-20 00:31:45,885 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-20 00:31:45,885 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-20 00:31:45,886 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (1/1) ... [2023-12-20 00:31:45,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-20 00:31:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:31:45,917 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) [2023-12-20 00:31:45,918 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 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-20 00:31:45,937 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-20 00:31:45,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-20 00:31:45,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-20 00:31:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-20 00:31:45,939 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-20 00:31:45,940 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-20 00:31:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2023-12-20 00:31:45,940 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2023-12-20 00:31:45,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-20 00:31:46,006 INFO L241 CfgBuilder]: Building ICFG [2023-12-20 00:31:46,008 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-20 00:31:46,160 INFO L282 CfgBuilder]: Performing block encoding [2023-12-20 00:31:46,194 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-20 00:31:46,194 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-20 00:31:46,194 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:31:46 BoogieIcfgContainer [2023-12-20 00:31:46,194 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-20 00:31:46,196 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-20 00:31:46,196 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-20 00:31:46,198 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-20 00:31:46,198 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.12 12:31:45" (1/3) ... [2023-12-20 00:31:46,198 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582279f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:31:46, skipping insertion in model container [2023-12-20 00:31:46,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.12 12:31:45" (2/3) ... [2023-12-20 00:31:46,199 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@582279f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.12 12:31:46, skipping insertion in model container [2023-12-20 00:31:46,199 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.12 12:31:46" (3/3) ... [2023-12-20 00:31:46,200 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps5-ll.c [2023-12-20 00:31:46,217 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-20 00:31:46,217 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-20 00:31:46,248 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-20 00:31:46,253 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;@73c3a5fb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-20 00:31:46,253 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-20 00:31:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-20 00:31:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 00:31:46,260 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:31:46,261 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:31:46,262 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:31:46,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:31:46,265 INFO L85 PathProgramCache]: Analyzing trace with hash 511642872, now seen corresponding path program 1 times [2023-12-20 00:31:46,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:31:46,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285268257] [2023-12-20 00:31:46,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:46,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:31:46,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:31:46,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:31:46,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285268257] [2023-12-20 00:31:46,385 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-20 00:31:46,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678823284] [2023-12-20 00:31:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:46,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:31:46,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:31:46,388 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) [2023-12-20 00:31:46,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-20 00:31:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:31:46,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-20 00:31:46,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:31:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:31:46,527 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:31:46,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678823284] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:31:46,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:31:46,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-20 00:31:46,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644784375] [2023-12-20 00:31:46,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:31:46,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-20 00:31:46,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:31:46,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-20 00:31:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 00:31:46,551 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 00:31:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:31:46,569 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-12-20 00:31:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-20 00:31:46,570 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 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 10 [2023-12-20 00:31:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:31:46,586 INFO L225 Difference]: With dead ends: 46 [2023-12-20 00:31:46,586 INFO L226 Difference]: Without dead ends: 22 [2023-12-20 00:31:46,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-20 00:31:46,590 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-20 00:31:46,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 25 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-20 00:31:46,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-20 00:31:46,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-20 00:31:46,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 16 states have internal predecessors, (16), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-20 00:31:46,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-20 00:31:46,613 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-12-20 00:31:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:31:46,614 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-20 00:31:46,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-20 00:31:46,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-20 00:31:46,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-20 00:31:46,614 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:31:46,614 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:31:46,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-20 00:31:46,819 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 [2023-12-20 00:31:46,819 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:31:46,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:31:46,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1191701242, now seen corresponding path program 1 times [2023-12-20 00:31:46,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:31:46,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24136544] [2023-12-20 00:31:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:31:46,862 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:31:46,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522393195] [2023-12-20 00:31:46,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:46,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:31:46,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:31:46,869 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) [2023-12-20 00:31:46,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-20 00:31:46,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:31:46,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 50 conjunts are in the unsatisfiable core [2023-12-20 00:31:46,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:31:47,033 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 [2023-12-20 00:31:47,038 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 [2023-12-20 00:31:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:31:47,183 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-20 00:31:47,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:31:47,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24136544] [2023-12-20 00:31:47,183 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:31:47,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522393195] [2023-12-20 00:31:47,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522393195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-20 00:31:47,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-20 00:31:47,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-20 00:31:47,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90341364] [2023-12-20 00:31:47,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-20 00:31:47,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-20 00:31:47,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:31:47,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-20 00:31:47,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-12-20 00:31:47,186 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-12-20 00:31:47,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:31:47,357 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-12-20 00:31:47,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-20 00:31:47,358 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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 10 [2023-12-20 00:31:47,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:31:47,359 INFO L225 Difference]: With dead ends: 39 [2023-12-20 00:31:47,359 INFO L226 Difference]: Without dead ends: 37 [2023-12-20 00:31:47,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2023-12-20 00:31:47,364 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:31:47,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 93 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:31:47,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-20 00:31:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-12-20 00:31:47,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-20 00:31:47,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-20 00:31:47,385 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2023-12-20 00:31:47,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:31:47,388 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-20 00:31:47,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 6 states have internal predecessors, (8), 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) [2023-12-20 00:31:47,388 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-20 00:31:47,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 00:31:47,389 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:31:47,389 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:31:47,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-20 00:31:47,599 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 [2023-12-20 00:31:47,600 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:31:47,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:31:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash -867575748, now seen corresponding path program 1 times [2023-12-20 00:31:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:31:47,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230239566] [2023-12-20 00:31:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:47,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:31:47,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:31:47,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566200955] [2023-12-20 00:31:47,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:47,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:31:47,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:31:47,645 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) [2023-12-20 00:31:47,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-20 00:31:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:31:47,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-20 00:31:47,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:31:47,818 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 15 treesize of output 1 [2023-12-20 00:31:47,859 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 [2023-12-20 00:31:47,864 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 [2023-12-20 00:31:47,872 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 [2023-12-20 00:31:48,119 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 39 treesize of output 31 [2023-12-20 00:31:48,128 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 [2023-12-20 00:31:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:31:48,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:31:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 00:31:48,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:31:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230239566] [2023-12-20 00:31:48,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:31:48,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566200955] [2023-12-20 00:31:48,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566200955] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-20 00:31:48,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-20 00:31:48,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 20 [2023-12-20 00:31:48,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094589935] [2023-12-20 00:31:48,429 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-20 00:31:48,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-20 00:31:48,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:31:48,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-20 00:31:48,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:31:48,431 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 20 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 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) [2023-12-20 00:31:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:31:49,539 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-12-20 00:31:49,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-20 00:31:49,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 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 20 [2023-12-20 00:31:49,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:31:49,542 INFO L225 Difference]: With dead ends: 63 [2023-12-20 00:31:49,542 INFO L226 Difference]: Without dead ends: 61 [2023-12-20 00:31:49,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=744, Unknown=0, NotChecked=0, Total=870 [2023-12-20 00:31:49,543 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-20 00:31:49,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 134 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-20 00:31:49,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-20 00:31:49,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-12-20 00:31:49,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-20 00:31:49,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-12-20 00:31:49,554 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2023-12-20 00:31:49,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:31:49,554 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-12-20 00:31:49,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 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) [2023-12-20 00:31:49,554 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-12-20 00:31:49,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-20 00:31:49,555 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:31:49,555 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:31:49,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-20 00:31:49,760 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 [2023-12-20 00:31:49,761 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:31:49,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:31:49,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1570354830, now seen corresponding path program 1 times [2023-12-20 00:31:49,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:31:49,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669334138] [2023-12-20 00:31:49,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:49,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:31:49,791 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:31:49,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815708791] [2023-12-20 00:31:49,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:31:49,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:31:49,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:31:49,794 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) [2023-12-20 00:31:49,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-20 00:31:49,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:31:49,858 WARN L260 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 118 conjunts are in the unsatisfiable core [2023-12-20 00:31:49,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:31:49,875 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 15 treesize of output 1 [2023-12-20 00:31:49,912 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 [2023-12-20 00:31:49,916 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 [2023-12-20 00:31:49,921 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 [2023-12-20 00:31:57,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:31:57,779 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:32:06,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:32:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669334138] [2023-12-20 00:32:06,338 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:32:06,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815708791] [2023-12-20 00:32:06,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815708791] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:32:06,338 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:32:06,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-20 00:32:06,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327513155] [2023-12-20 00:32:06,338 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:32:06,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-20 00:32:06,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:32:06,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-20 00:32:06,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=364, Unknown=1, NotChecked=0, Total=420 [2023-12-20 00:32:06,339 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-12-20 00:32:10,370 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 [0] [2023-12-20 00:32:14,383 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 [0] [2023-12-20 00:32:22,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:32:22,925 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-20 00:32:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 00:32:22,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 12 states have internal predecessors, (15), 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 20 [2023-12-20 00:32:22,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:32:22,926 INFO L225 Difference]: With dead ends: 61 [2023-12-20 00:32:22,926 INFO L226 Difference]: Without dead ends: 59 [2023-12-20 00:32:22,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=115, Invalid=752, Unknown=3, NotChecked=0, Total=870 [2023-12-20 00:32:22,927 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:32:22,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 245 Invalid, 2 Unknown, 0 Unchecked, 8.2s Time] [2023-12-20 00:32:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-20 00:32:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-12-20 00:32:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-20 00:32:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 64 transitions. [2023-12-20 00:32:22,935 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 64 transitions. Word has length 20 [2023-12-20 00:32:22,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:32:22,936 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 64 transitions. [2023-12-20 00:32:22,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 12 states have internal predecessors, (15), 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) [2023-12-20 00:32:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 64 transitions. [2023-12-20 00:32:22,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-20 00:32:22,936 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:32:22,936 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:32:22,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-20 00:32:23,148 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 [2023-12-20 00:32:23,148 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:32:23,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:32:23,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1441616947, now seen corresponding path program 1 times [2023-12-20 00:32:23,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:32:23,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443654945] [2023-12-20 00:32:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:23,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:32:23,172 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:32:23,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886946918] [2023-12-20 00:32:23,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:23,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:32:23,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:32:23,173 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) [2023-12-20 00:32:23,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-20 00:32:23,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:32:23,267 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 21 conjunts are in the unsatisfiable core [2023-12-20 00:32:23,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:32:23,272 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 [2023-12-20 00:32:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-20 00:32:23,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:32:23,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:32:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443654945] [2023-12-20 00:32:23,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:32:23,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886946918] [2023-12-20 00:32:23,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886946918] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:32:23,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:32:23,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-12-20 00:32:23,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870035414] [2023-12-20 00:32:23,484 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:32:23,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-20 00:32:23,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:32:23,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-20 00:32:23,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-20 00:32:23,486 INFO L87 Difference]: Start difference. First operand 57 states and 64 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 00:32:23,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:32:23,647 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2023-12-20 00:32:23,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-20 00:32:23,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2023-12-20 00:32:23,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:32:23,648 INFO L225 Difference]: With dead ends: 65 [2023-12-20 00:32:23,648 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 00:32:23,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-12-20 00:32:23,649 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-20 00:32:23,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-12-20 00:32:23,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 00:32:23,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-20 00:32:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (12), 8 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-20 00:32:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-12-20 00:32:23,656 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 26 [2023-12-20 00:32:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:32:23,656 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-12-20 00:32:23,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-12-20 00:32:23,656 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-12-20 00:32:23,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-20 00:32:23,657 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:32:23,657 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, 1, 1] [2023-12-20 00:32:23,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-20 00:32:23,857 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 [2023-12-20 00:32:23,858 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:32:23,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:32:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 656708138, now seen corresponding path program 1 times [2023-12-20 00:32:23,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:32:23,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709308156] [2023-12-20 00:32:23,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:23,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:32:23,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:32:23,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624082406] [2023-12-20 00:32:23,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:23,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:32:23,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:32:23,890 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) [2023-12-20 00:32:23,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-20 00:32:24,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:32:24,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 124 conjunts are in the unsatisfiable core [2023-12-20 00:32:24,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:32:24,251 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 [2023-12-20 00:32:24,343 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 15 treesize of output 1 [2023-12-20 00:32:24,595 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 [2023-12-20 00:32:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-20 00:32:24,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:32:29,402 WARN L854 $PredicateComparison]: unable to prove that (and (or (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_5|))) (= (+ .cse0 (* 30 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_5|))) (+ (* 6 (* .cse0 .cse0 .cse0 .cse0 .cse0)) (* (* .cse0 .cse0 .cse0 .cse0) 15) (* (* .cse0 .cse0 .cse0) 10))))) (let ((.cse1 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (= (+ .cse1 (* 30 (select (select |c_old(#memory_int#2)| |c_func_to_recursive_line_27_to_35_0_#in~x.base|) |c_func_to_recursive_line_27_to_35_0_#in~x.offset|))) (+ (* 10 (* .cse1 .cse1 .cse1)) (* (* .cse1 .cse1 .cse1 .cse1 .cse1) 6) (* (* .cse1 .cse1 .cse1 .cse1) 15))))) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_5| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_5| Int)) (or (not (let ((.cse2 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_5|))) (= (+ .cse2 (* 30 (select (select |c_old(#memory_int#2)| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_5|))) (+ (* 6 (* .cse2 .cse2 .cse2 .cse2 .cse2)) (* (* .cse2 .cse2 .cse2 .cse2) 15) (* (* .cse2 .cse2 .cse2) 10))))) (let ((.cse3 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_5|))) (= (+ .cse3 (* 30 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_5|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_5|))) (+ (* 6 (* .cse3 .cse3 .cse3 .cse3 .cse3)) (* (* .cse3 .cse3 .cse3 .cse3) 15) (* (* .cse3 .cse3 .cse3) 10))))))) is different from false [2023-12-20 00:32:38,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:32:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709308156] [2023-12-20 00:32:38,506 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:32:38,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624082406] [2023-12-20 00:32:38,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624082406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:32:38,507 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:32:38,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-20 00:32:38,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187836987] [2023-12-20 00:32:38,507 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:32:38,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-20 00:32:38,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:32:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-20 00:32:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=482, Unknown=3, NotChecked=44, Total=600 [2023-12-20 00:32:38,508 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-20 00:32:48,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:32:48,893 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-12-20 00:32:48,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-20 00:32:48,893 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (5), 4 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 32 [2023-12-20 00:32:48,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:32:48,894 INFO L225 Difference]: With dead ends: 59 [2023-12-20 00:32:48,894 INFO L226 Difference]: Without dead ends: 57 [2023-12-20 00:32:48,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 22.2s TimeCoverageRelationStatistics Valid=146, Invalid=909, Unknown=5, NotChecked=62, Total=1122 [2023-12-20 00:32:48,895 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-20 00:32:48,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 71 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-20 00:32:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-20 00:32:48,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-12-20 00:32:48,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (13), 9 states have call predecessors, (13), 8 states have call successors, (13) [2023-12-20 00:32:48,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-12-20 00:32:48,903 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 32 [2023-12-20 00:32:48,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:32:48,903 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-12-20 00:32:48,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-20 00:32:48,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-12-20 00:32:48,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-20 00:32:48,904 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:32:48,904 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:32:48,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-20 00:32:49,109 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 [2023-12-20 00:32:49,110 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:32:49,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:32:49,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1706020117, now seen corresponding path program 1 times [2023-12-20 00:32:49,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:32:49,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158542915] [2023-12-20 00:32:49,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:32:49,121 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:32:49,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692570660] [2023-12-20 00:32:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:49,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:32:49,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:32:49,122 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) [2023-12-20 00:32:49,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-20 00:32:49,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-20 00:32:49,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 93 conjunts are in the unsatisfiable core [2023-12-20 00:32:49,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:32:49,394 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 15 treesize of output 1 [2023-12-20 00:32:49,407 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 [2023-12-20 00:32:49,409 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 [2023-12-20 00:32:49,562 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 13 treesize of output 9 [2023-12-20 00:32:49,725 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 [2023-12-20 00:32:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-20 00:32:49,840 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:32:50,607 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 53 treesize of output 49 [2023-12-20 00:32:50,611 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 49 treesize of output 33 [2023-12-20 00:32:58,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:32:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158542915] [2023-12-20 00:32:58,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:32:58,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692570660] [2023-12-20 00:32:58,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692570660] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:32:58,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:32:58,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-20 00:32:58,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304320291] [2023-12-20 00:32:58,957 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:32:58,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 00:32:58,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:32:58,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 00:32:58,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=672, Unknown=2, NotChecked=0, Total=756 [2023-12-20 00:32:58,958 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 19 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-20 00:32:59,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:32:59,485 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-20 00:32:59,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-20 00:32:59,486 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2023-12-20 00:32:59,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:32:59,486 INFO L225 Difference]: With dead ends: 63 [2023-12-20 00:32:59,486 INFO L226 Difference]: Without dead ends: 45 [2023-12-20 00:32:59,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=176, Invalid=1382, Unknown=2, NotChecked=0, Total=1560 [2023-12-20 00:32:59,487 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-20 00:32:59,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 70 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 353 Invalid, 1 Unknown, 0 Unchecked, 0.2s Time] [2023-12-20 00:32:59,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-20 00:32:59,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-20 00:32:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-20 00:32:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-12-20 00:32:59,507 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2023-12-20 00:32:59,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:32:59,507 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-12-20 00:32:59,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-20 00:32:59,507 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-12-20 00:32:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-20 00:32:59,508 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:32:59,508 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, 1, 1] [2023-12-20 00:32:59,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-20 00:32:59,713 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 [2023-12-20 00:32:59,713 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:32:59,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:32:59,714 INFO L85 PathProgramCache]: Analyzing trace with hash -589022750, now seen corresponding path program 2 times [2023-12-20 00:32:59,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:32:59,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238824341] [2023-12-20 00:32:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:32:59,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:32:59,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:32:59,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429049101] [2023-12-20 00:32:59,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:32:59,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:32:59,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:32:59,727 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) [2023-12-20 00:32:59,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-20 00:33:00,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:33:00,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:33:00,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 128 conjunts are in the unsatisfiable core [2023-12-20 00:33:00,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:33:00,203 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 15 treesize of output 1 [2023-12-20 00:33:00,409 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 176 treesize of output 72 [2023-12-20 00:33:00,430 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 40 treesize of output 32 [2023-12-20 00:33:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-20 00:33:00,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:33:01,239 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 134 treesize of output 82 [2023-12-20 00:33:01,258 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:33:01,258 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 115 treesize of output 114 [2023-12-20 00:33:01,572 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-20 00:33:01,572 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 170 treesize of output 173 [2023-12-20 00:33:06,920 WARN L293 SmtUtils]: Spent 5.32s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:33:10,938 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base) c_func_to_recursive_line_27_to_35_0_~y.offset))) (let ((.cse2 (* .cse1 .cse1 .cse1 .cse1 15)) (.cse3 (* .cse1 .cse1 .cse1 .cse1 .cse1 6)) (.cse4 (* .cse1 .cse1 .cse1 10))) (or (and (= |c_func_to_recursive_line_27_to_35_0_#in~x.base| c_func_to_recursive_line_27_to_35_0_~x.base) (let ((.cse0 (select (select |c_#memory_int#3| |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (= (+ (* (* .cse0 .cse0 .cse0 .cse0) 15) (* 6 (* .cse0 .cse0 .cse0 .cse0 .cse0)) (* (* .cse0 .cse0 .cse0) 10)) (+ .cse0 (* 30 (div (+ (* (- 1) .cse1) .cse2 .cse3 .cse4) 30))))) (= c_func_to_recursive_line_27_to_35_0_~x.offset |c_func_to_recursive_line_27_to_35_0_#in~x.offset|)) (not (= (mod (+ .cse2 (* .cse1 29) .cse3 .cse4) 30) 0))))) is different from false [2023-12-20 00:33:23,035 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:33:27,058 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse2 (* .cse1 .cse1 .cse1 10)) (.cse3 (* .cse1 .cse1 .cse1 .cse1 .cse1 6)) (.cse4 (* .cse1 .cse1 .cse1 .cse1 15))) (and (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15| Int)) (or (not (let ((.cse0 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* 6 (* .cse0 .cse0 .cse0 .cse0 .cse0)) (* (* .cse0 .cse0 .cse0) 10) (* 15 (* .cse0 .cse0 .cse0 .cse0))) (+ (* (div (+ (* (- 1) .cse1) .cse2 .cse3 .cse4) 30) 30) .cse0)))) (let ((.cse5 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* (* .cse5 .cse5 .cse5 .cse5 .cse5) 6) (* (* .cse5 .cse5 .cse5) 10) (* 15 (* .cse5 .cse5 .cse5 .cse5))) (+ (* (select (select |c_#memory_int#2| |c_func_to_recursive_line_27_to_35_0_#in~x.base|) |c_func_to_recursive_line_27_to_35_0_#in~x.offset|) 30) .cse5))))) (or (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15| Int)) (let ((.cse6 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* 30 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_12|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_12|)) .cse6) (+ (* (* .cse6 .cse6 .cse6 .cse6 .cse6) 6) (* (* .cse6 .cse6 .cse6) 10) (* 15 (* .cse6 .cse6 .cse6 .cse6)))))) (= (mod (+ (* .cse1 29) .cse2 .cse3 .cse4) 30) 0))))) is different from true [2023-12-20 00:33:39,080 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:33:51,167 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:34:03,233 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:34:15,323 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-20 00:34:19,959 WARN L876 $PredicateComparison]: unable to prove that (or (let ((.cse1 (select (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse2 (* .cse1 .cse1 .cse1 10)) (.cse3 (* .cse1 .cse1 .cse1 .cse1 .cse1 6)) (.cse4 (* .cse1 .cse1 .cse1 .cse1 15))) (and (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15| Int)) (or (not (let ((.cse0 (select (select |c_old(#memory_int#3)| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* 6 (* .cse0 .cse0 .cse0 .cse0 .cse0)) (* (* .cse0 .cse0 .cse0) 10) (* 15 (* .cse0 .cse0 .cse0 .cse0))) (+ (* (div (+ (* (- 1) .cse1) .cse2 .cse3 .cse4) 30) 30) .cse0)))) (let ((.cse5 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* (* .cse5 .cse5 .cse5 .cse5 .cse5) 6) (* (* .cse5 .cse5 .cse5) 10) (* 15 (* .cse5 .cse5 .cse5 .cse5))) (+ (* (select (select |c_#memory_int#2| |c_func_to_recursive_line_27_to_35_0_#in~x.base|) |c_func_to_recursive_line_27_to_35_0_#in~x.offset|) 30) .cse5))))) (or (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_12| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15| Int)) (let ((.cse6 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_15|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_15|))) (= (+ (* 30 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_12|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_12|)) .cse6) (+ (* (* .cse6 .cse6 .cse6 .cse6 .cse6) 6) (* (* .cse6 .cse6 .cse6) 10) (* 15 (* .cse6 .cse6 .cse6 .cse6)))))) (= (mod (+ (* .cse1 29) .cse2 .cse3 .cse4) 30) 0))))) (not (= (+ (* 30 |c_func_to_recursive_line_27_to_35_0_#t~mem16|) |c_func_to_recursive_line_27_to_35_0_#t~mem17|) (+ (* (* |c_func_to_recursive_line_27_to_35_0_#t~mem8| |c_func_to_recursive_line_27_to_35_0_#t~mem4| |c_func_to_recursive_line_27_to_35_0_#t~mem7| |c_func_to_recursive_line_27_to_35_0_#t~mem5| |c_func_to_recursive_line_27_to_35_0_#t~mem6|) 6) (* (* |c_func_to_recursive_line_27_to_35_0_#t~mem14| |c_func_to_recursive_line_27_to_35_0_#t~mem15| |c_func_to_recursive_line_27_to_35_0_#t~mem13|) 10) (* 15 (* |c_func_to_recursive_line_27_to_35_0_#t~mem9| |c_func_to_recursive_line_27_to_35_0_#t~mem12| |c_func_to_recursive_line_27_to_35_0_#t~mem11| |c_func_to_recursive_line_27_to_35_0_#t~mem10|)))))) is different from true [2023-12-20 00:34:19,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:19,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238824341] [2023-12-20 00:34:19,961 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:19,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429049101] [2023-12-20 00:34:19,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429049101] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:19,961 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:19,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-20 00:34:19,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282712504] [2023-12-20 00:34:19,961 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:19,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-20 00:34:19,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-20 00:34:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=266, Unknown=3, NotChecked=102, Total=420 [2023-12-20 00:34:19,962 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 00:34:23,929 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.79s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-20 00:34:24,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:24,093 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2023-12-20 00:34:24,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-20 00:34:24,093 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 44 [2023-12-20 00:34:24,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:24,094 INFO L225 Difference]: With dead ends: 51 [2023-12-20 00:34:24,094 INFO L226 Difference]: Without dead ends: 47 [2023-12-20 00:34:24,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=105, Invalid=554, Unknown=3, NotChecked=150, Total=812 [2023-12-20 00:34:24,094 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:24,095 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 57 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-12-20 00:34:24,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-20 00:34:24,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2023-12-20 00:34:24,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2023-12-20 00:34:24,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-20 00:34:24,103 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 44 [2023-12-20 00:34:24,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:24,103 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-20 00:34:24,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2023-12-20 00:34:24,103 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-20 00:34:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-20 00:34:24,106 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:24,106 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:24,122 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-20 00:34:24,306 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 [2023-12-20 00:34:24,306 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:24,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:24,307 INFO L85 PathProgramCache]: Analyzing trace with hash -84856669, now seen corresponding path program 2 times [2023-12-20 00:34:24,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:24,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371123405] [2023-12-20 00:34:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:24,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:24,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:24,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [964651406] [2023-12-20 00:34:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-20 00:34:24,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:24,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:24,325 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:24,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-20 00:34:24,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-20 00:34:24,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-20 00:34:24,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 130 conjunts are in the unsatisfiable core [2023-12-20 00:34:24,873 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-20 00:34:24,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 14 treesize of output 12 [2023-12-20 00:34:24,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2023-12-20 00:34:24,898 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 [2023-12-20 00:34:24,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2023-12-20 00:34:25,181 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 13 treesize of output 9 [2023-12-20 00:34:25,372 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 [2023-12-20 00:34:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-20 00:34:25,494 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-20 00:34:26,840 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 55 treesize of output 51 [2023-12-20 00:34:26,847 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 51 treesize of output 35 [2023-12-20 00:34:28,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-20 00:34:28,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371123405] [2023-12-20 00:34:28,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-20 00:34:28,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964651406] [2023-12-20 00:34:28,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964651406] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-20 00:34:28,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-20 00:34:28,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-20 00:34:28,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758753405] [2023-12-20 00:34:28,339 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-20 00:34:28,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-20 00:34:28,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-20 00:34:28,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-20 00:34:28,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=681, Unknown=0, NotChecked=0, Total=756 [2023-12-20 00:34:28,340 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 15 states have (on average 1.8) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-20 00:34:28,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-20 00:34:28,965 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-12-20 00:34:28,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-20 00:34:28,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2023-12-20 00:34:28,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-20 00:34:28,966 INFO L225 Difference]: With dead ends: 61 [2023-12-20 00:34:28,966 INFO L226 Difference]: Without dead ends: 49 [2023-12-20 00:34:28,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=140, Invalid=1192, Unknown=0, NotChecked=0, Total=1332 [2023-12-20 00:34:28,968 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-20 00:34:28,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 89 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 417 Invalid, 1 Unknown, 0 Unchecked, 0.3s Time] [2023-12-20 00:34:28,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-20 00:34:28,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-20 00:34:28,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (11), 8 states have call predecessors, (11), 7 states have call successors, (11) [2023-12-20 00:34:28,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-12-20 00:34:28,978 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 50 [2023-12-20 00:34:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-20 00:34:28,978 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-12-20 00:34:28,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8) internal successors, (27), 17 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-20 00:34:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-12-20 00:34:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-20 00:34:28,979 INFO L187 NwaCegarLoop]: Found error trace [2023-12-20 00:34:28,979 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-20 00:34:28,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-20 00:34:29,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:29,185 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-20 00:34:29,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-20 00:34:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1187581275, now seen corresponding path program 3 times [2023-12-20 00:34:29,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-20 00:34:29,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78974656] [2023-12-20 00:34:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-20 00:34:29,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-20 00:34:29,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-20 00:34:29,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1059165899] [2023-12-20 00:34:29,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-20 00:34:29,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-20 00:34:29,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-20 00:34:29,200 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-20 00:34:29,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process Received shutdown request... [2023-12-20 00:46:30,836 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 [2023-12-20 00:46:30,836 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-20 00:46:31,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 [2023-12-20 00:46:32,037 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forcibly destroying the process [2023-12-20 00:46:32,055 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-20 00:46:32,056 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-20 00:46:32,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-20 00:46:32,057 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 63 with TraceHistMax 6,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-20 00:46:32,061 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2023-12-20 00:46:32,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 137 [2023-12-20 00:46:32,063 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-20 00:46:32,065 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.12 12:46:32 BoogieIcfgContainer [2023-12-20 00:46:32,065 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-20 00:46:32,065 INFO L158 Benchmark]: Toolchain (without parser) took 886431.53ms. Allocated memory is still 280.0MB. Free memory was 235.0MB in the beginning and 111.2MB in the end (delta: 123.9MB). Peak memory consumption was 124.8MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,066 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 192.9MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-20 00:46:32,066 INFO L158 Benchmark]: CACSL2BoogieTranslator took 185.04ms. Allocated memory is still 280.0MB. Free memory was 235.0MB in the beginning and 223.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,066 INFO L158 Benchmark]: Boogie Procedure Inliner took 27.83ms. Allocated memory is still 280.0MB. Free memory was 223.4MB in the beginning and 221.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,066 INFO L158 Benchmark]: Boogie Preprocessor took 35.25ms. Allocated memory is still 280.0MB. Free memory was 221.8MB in the beginning and 219.3MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,066 INFO L158 Benchmark]: RCFGBuilder took 309.27ms. Allocated memory is still 280.0MB. Free memory was 219.3MB in the beginning and 203.0MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,067 INFO L158 Benchmark]: TraceAbstraction took 885869.44ms. Allocated memory is still 280.0MB. Free memory was 202.1MB in the beginning and 111.2MB in the end (delta: 90.9MB). Peak memory consumption was 92.3MB. Max. memory is 8.0GB. [2023-12-20 00:46:32,068 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 192.9MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 185.04ms. Allocated memory is still 280.0MB. Free memory was 235.0MB in the beginning and 223.4MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 27.83ms. Allocated memory is still 280.0MB. Free memory was 223.4MB in the beginning and 221.8MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 35.25ms. Allocated memory is still 280.0MB. Free memory was 221.8MB in the beginning and 219.3MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 309.27ms. Allocated memory is still 280.0MB. Free memory was 219.3MB in the beginning and 203.0MB in the end (delta: 16.3MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 885869.44ms. Allocated memory is still 280.0MB. Free memory was 202.1MB in the beginning and 111.2MB in the end (delta: 90.9MB). Peak memory consumption was 92.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - 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 63 with TraceHistMax 6,while AutomatonFreeRefinementEngine was Timeout during CAMEL. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 885.8s, OverallIterations: 10, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 33.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 250 SdHoareTripleChecker+Valid, 15.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 242 mSDsluCounter, 668 SdHoareTripleChecker+Invalid, 14.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 555 mSDsCounter, 114 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1914 IncrementalHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 114 mSolverCounterUnsat, 113 mSDtfsCounter, 1914 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 426 GetRequests, 205 SyntacticMatches, 5 SemanticMatches, 216 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 1110 ImplicationChecksByTransitivity, 62.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=57occurred in iteration=4, InterpolantAutomatonStates: 128, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 20 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.5s SatisfiabilityAnalysisTime, 124.8s InterpolantComputationTime, 260 NumberOfCodeBlocks, 260 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 260 ConstructedInterpolants, 20 QuantifiedInterpolants, 5764 SizeOfPredicates, 262 NumberOfNonLiveVariables, 2438 ConjunctsInSsa, 792 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 93/154 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