/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps6-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 11:07:08,468 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 11:07:08,524 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 11:07:08,527 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 11:07:08,527 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 11:07:08,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 11:07:08,546 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 11:07:08,546 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 11:07:08,547 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 11:07:08,547 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 11:07:08,548 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 11:07:08,548 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 11:07:08,549 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 11:07:08,549 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 11:07:08,549 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 11:07:08,550 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 11:07:08,550 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 11:07:08,550 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 11:07:08,551 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 11:07:08,551 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 11:07:08,551 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 11:07:08,552 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 11:07:08,552 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 11:07:08,553 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 11:07:08,553 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 11:07:08,553 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 11:07:08,554 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 11:07:08,554 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 11:07:08,554 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 11:07:08,555 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 11:07:08,555 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 11:07:08,556 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 11:07:08,556 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:07:08,556 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 11:07:08,557 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 11:07:08,557 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 11:07:08,557 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 11:07:08,558 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 11:07:08,558 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 11:07:08,558 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 11:07:08,559 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 11:07:08,559 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 11:07:08,559 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 11:07:08,560 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 11:07:08,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 11:07:08,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 11:07:08,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 11:07:08,802 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 11:07:08,805 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 11:07:08,807 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps6-ll.c [2023-12-21 11:07:09,824 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 11:07:10,016 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 11:07:10,017 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps6-ll.c [2023-12-21 11:07:10,022 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f92341f/dc2e2cc4276b41109bc243a9ff259777/FLAG5c2727572 [2023-12-21 11:07:10,034 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41f92341f/dc2e2cc4276b41109bc243a9ff259777 [2023-12-21 11:07:10,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 11:07:10,038 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 11:07:10,039 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 11:07:10,039 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 11:07:10,042 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 11:07:10,043 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,044 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@717bef4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10, skipping insertion in model container [2023-12-21 11:07:10,044 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,069 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 11:07:10,204 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_ps6-ll.c[987,1000] [2023-12-21 11:07:10,220 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:07:10,228 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 11:07:10,236 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_ps6-ll.c[987,1000] [2023-12-21 11:07:10,247 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:07:10,259 INFO L206 MainTranslator]: Completed translation [2023-12-21 11:07:10,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10 WrapperNode [2023-12-21 11:07:10,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 11:07:10,260 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 11:07:10,260 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 11:07:10,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 11:07:10,266 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,273 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,289 INFO L138 Inliner]: procedures = 16, calls = 83, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 91 [2023-12-21 11:07:10,289 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 11:07:10,290 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 11:07:10,290 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 11:07:10,290 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 11:07:10,298 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,298 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,301 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,313 INFO L175 MemorySlicer]: Split 60 memory accesses to 5 slices as follows [2, 4, 5, 45, 4]. 75 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]. [2023-12-21 11:07:10,313 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,314 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,321 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,322 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,323 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 11:07:10,327 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 11:07:10,327 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 11:07:10,327 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 11:07:10,328 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (1/1) ... [2023-12-21 11:07:10,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:07:10,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:10,356 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) [2023-12-21 11:07:10,358 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 [2023-12-21 11:07:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 11:07:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 11:07:10,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 11:07:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 11:07:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 11:07:10,383 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 11:07:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 11:07:10,384 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 11:07:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 11:07:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 11:07:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 11:07:10,385 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 11:07:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 11:07:10,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 11:07:10,386 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 11:07:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_27_to_35_0 [2023-12-21 11:07:10,387 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_27_to_35_0 [2023-12-21 11:07:10,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 11:07:10,505 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 11:07:10,509 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 11:07:10,746 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 11:07:10,768 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 11:07:10,768 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 11:07:10,768 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:07:10 BoogieIcfgContainer [2023-12-21 11:07:10,769 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 11:07:10,771 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 11:07:10,771 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 11:07:10,773 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 11:07:10,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:07:10" (1/3) ... [2023-12-21 11:07:10,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2535c50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:07:10, skipping insertion in model container [2023-12-21 11:07:10,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:07:10" (2/3) ... [2023-12-21 11:07:10,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2535c50f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:07:10, skipping insertion in model container [2023-12-21 11:07:10,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:07:10" (3/3) ... [2023-12-21 11:07:10,775 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps6-ll.c [2023-12-21 11:07:10,790 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 11:07:10,790 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 11:07:10,836 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 11:07:10,843 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;@70aa7bca, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 11:07:10,843 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 11:07:10,847 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) [2023-12-21 11:07:10,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 11:07:10,853 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:10,854 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:10,854 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:10,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 511642872, now seen corresponding path program 1 times [2023-12-21 11:07:10,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:10,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551494324] [2023-12-21 11:07:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:10,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:11,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:11,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551494324] [2023-12-21 11:07:11,045 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 11:07:11,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520711652] [2023-12-21 11:07:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:11,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:11,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:11,049 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) [2023-12-21 11:07:11,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 11:07:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:11,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 11:07:11,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:11,192 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:07:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520711652] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:07:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:07:11,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 11:07:11,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447029938] [2023-12-21 11:07:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:07:11,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 11:07:11,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:11,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 11:07:11,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 11:07:11,222 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) [2023-12-21 11:07:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:11,250 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2023-12-21 11:07:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 11:07:11,252 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 [2023-12-21 11:07:11,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:11,258 INFO L225 Difference]: With dead ends: 46 [2023-12-21 11:07:11,258 INFO L226 Difference]: Without dead ends: 22 [2023-12-21 11:07:11,261 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 [2023-12-21 11:07:11,266 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 [2023-12-21 11:07:11,267 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] [2023-12-21 11:07:11,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-12-21 11:07:11,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-12-21 11:07:11,298 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) [2023-12-21 11:07:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-12-21 11:07:11,301 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2023-12-21 11:07:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:11,302 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-12-21 11:07:11,302 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) [2023-12-21 11:07:11,302 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-12-21 11:07:11,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-12-21 11:07:11,303 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:11,303 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:11,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 11:07:11,508 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 [2023-12-21 11:07:11,509 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:11,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:11,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1191701242, now seen corresponding path program 1 times [2023-12-21 11:07:11,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:11,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021589917] [2023-12-21 11:07:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:11,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:11,555 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:11,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985771903] [2023-12-21 11:07:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:11,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:11,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:11,559 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) [2023-12-21 11:07:11,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 11:07:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:11,680 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-21 11:07:11,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:11,848 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 [2023-12-21 11:07:11,855 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 [2023-12-21 11:07:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:12,031 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:07:12,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:12,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021589917] [2023-12-21 11:07:12,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:12,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985771903] [2023-12-21 11:07:12,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985771903] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:07:12,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:07:12,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-12-21 11:07:12,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828185050] [2023-12-21 11:07:12,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:07:12,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-21 11:07:12,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:12,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-21 11:07:12,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2023-12-21 11:07:12,036 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 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) [2023-12-21 11:07:12,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:12,250 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2023-12-21 11:07:12,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 11:07:12,251 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 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 [2023-12-21 11:07:12,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:12,252 INFO L225 Difference]: With dead ends: 39 [2023-12-21 11:07:12,252 INFO L226 Difference]: Without dead ends: 37 [2023-12-21 11:07:12,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-12-21 11:07:12,253 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:12,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:07:12,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-12-21 11:07:12,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 33. [2023-12-21 11:07:12,262 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) [2023-12-21 11:07:12,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2023-12-21 11:07:12,263 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 10 [2023-12-21 11:07:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:12,263 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2023-12-21 11:07:12,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 1.0) internal successors, (8), 7 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) [2023-12-21 11:07:12,263 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2023-12-21 11:07:12,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 11:07:12,264 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:12,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:12,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:12,470 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 [2023-12-21 11:07:12,471 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:12,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:12,471 INFO L85 PathProgramCache]: Analyzing trace with hash -867575748, now seen corresponding path program 1 times [2023-12-21 11:07:12,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:12,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741995764] [2023-12-21 11:07:12,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:12,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:12,497 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:12,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1716711642] [2023-12-21 11:07:12,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:12,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:12,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:12,499 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) [2023-12-21 11:07:12,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 11:07:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:12,620 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 105 conjunts are in the unsatisfiable core [2023-12-21 11:07:12,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:12,671 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 [2023-12-21 11:07:12,677 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 [2023-12-21 11:07:12,869 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 44 treesize of output 36 [2023-12-21 11:07:12,881 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 [2023-12-21 11:07:13,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:13,142 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 11:07:13,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741995764] [2023-12-21 11:07:13,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:13,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716711642] [2023-12-21 11:07:13,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716711642] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:13,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:13,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-12-21 11:07:13,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014826645] [2023-12-21 11:07:13,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:13,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:07:13,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:13,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:07:13,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2023-12-21 11:07:13,569 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2023-12-21 11:07:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:14,620 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2023-12-21 11:07:14,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:07:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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 [2023-12-21 11:07:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:14,623 INFO L225 Difference]: With dead ends: 63 [2023-12-21 11:07:14,623 INFO L226 Difference]: Without dead ends: 61 [2023-12-21 11:07:14,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:07:14,625 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 62 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:14,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 125 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:07:14,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-21 11:07:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-12-21 11:07:14,637 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) [2023-12-21 11:07:14,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 56 transitions. [2023-12-21 11:07:14,638 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 56 transitions. Word has length 20 [2023-12-21 11:07:14,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:14,638 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 56 transitions. [2023-12-21 11:07:14,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 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) [2023-12-21 11:07:14,639 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 56 transitions. [2023-12-21 11:07:14,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-12-21 11:07:14,639 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:14,639 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:14,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:14,846 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 [2023-12-21 11:07:14,847 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:14,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:14,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1570354830, now seen corresponding path program 1 times [2023-12-21 11:07:14,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050968239] [2023-12-21 11:07:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:14,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:14,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832250183] [2023-12-21 11:07:14,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:14,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:14,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:14,867 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) [2023-12-21 11:07:14,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 11:07:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:14,979 WARN L260 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 146 conjunts are in the unsatisfiable core [2023-12-21 11:07:14,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:15,017 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 [2023-12-21 11:07:15,052 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 [2023-12-21 11:07:15,058 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 [2023-12-21 11:07:15,062 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 [2023-12-21 11:07:15,725 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 217 treesize of output 81 [2023-12-21 11:07:15,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:15,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:20,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:20,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050968239] [2023-12-21 11:07:20,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:20,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832250183] [2023-12-21 11:07:20,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832250183] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:07:20,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:07:20,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2023-12-21 11:07:20,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538217614] [2023-12-21 11:07:20,175 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:20,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 11:07:20,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:20,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 11:07:20,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:07:20,177 INFO L87 Difference]: Start difference. First operand 49 states and 56 transitions. Second operand has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:07:26,376 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.96s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:07:28,482 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:07:32,807 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:07:36,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [1] [2023-12-21 11:07:39,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:39,176 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2023-12-21 11:07:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:07:39,177 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 20 [2023-12-21 11:07:39,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:39,178 INFO L225 Difference]: With dead ends: 65 [2023-12-21 11:07:39,178 INFO L226 Difference]: Without dead ends: 63 [2023-12-21 11:07:39,179 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=243, Invalid=1563, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 11:07:39,181 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 40 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.0s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:39,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 39 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 314 Invalid, 1 Unknown, 0 Unchecked, 16.0s Time] [2023-12-21 11:07:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-21 11:07:39,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-12-21 11:07:39,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 39 states have internal predecessors, (40), 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) [2023-12-21 11:07:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-12-21 11:07:39,197 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 20 [2023-12-21 11:07:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:39,197 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-12-21 11:07:39,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:07:39,197 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-12-21 11:07:39,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-12-21 11:07:39,198 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:39,198 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] [2023-12-21 11:07:39,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:39,403 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 [2023-12-21 11:07:39,404 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:39,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:39,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1441616947, now seen corresponding path program 1 times [2023-12-21 11:07:39,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:39,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047713811] [2023-12-21 11:07:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:39,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:39,424 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:39,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991961805] [2023-12-21 11:07:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:39,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:39,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:39,430 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) [2023-12-21 11:07:39,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 11:07:39,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:39,546 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 39 conjunts are in the unsatisfiable core [2023-12-21 11:07:39,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:39,557 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 [2023-12-21 11:07:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:07:39,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047713811] [2023-12-21 11:07:39,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:39,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991961805] [2023-12-21 11:07:39,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991961805] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:39,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:39,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-21 11:07:39,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991805231] [2023-12-21 11:07:39,818 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:39,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 11:07:39,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:39,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 11:07:39,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2023-12-21 11:07:39,821 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2023-12-21 11:07:40,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:40,061 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2023-12-21 11:07:40,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-21 11:07:40,062 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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 [2023-12-21 11:07:40,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:40,063 INFO L225 Difference]: With dead ends: 71 [2023-12-21 11:07:40,063 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 11:07:40,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-12-21 11:07:40,064 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 33 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:40,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 68 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 150 Invalid, 1 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:07:40,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 11:07:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-21 11:07:40,079 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) [2023-12-21 11:07:40,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2023-12-21 11:07:40,081 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 26 [2023-12-21 11:07:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:40,081 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2023-12-21 11:07:40,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 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) [2023-12-21 11:07:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2023-12-21 11:07:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-12-21 11:07:40,082 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:40,083 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] [2023-12-21 11:07:40,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 11:07:40,289 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 [2023-12-21 11:07:40,289 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:40,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:40,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1706020117, now seen corresponding path program 1 times [2023-12-21 11:07:40,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:40,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407170905] [2023-12-21 11:07:40,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:40,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:40,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:40,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874006641] [2023-12-21 11:07:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:40,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:40,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:40,315 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) [2023-12-21 11:07:40,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 11:07:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:07:40,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 159 conjunts are in the unsatisfiable core [2023-12-21 11:07:40,458 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:40,466 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 [2023-12-21 11:07:40,486 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 [2023-12-21 11:07:40,491 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 [2023-12-21 11:07:40,496 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 [2023-12-21 11:07:40,800 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 [2023-12-21 11:07:41,040 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 44 treesize of output 36 [2023-12-21 11:07:41,050 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 [2023-12-21 11:07:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-12-21 11:07:41,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:50,263 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 158 treesize of output 74 [2023-12-21 11:07:50,274 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 74 treesize of output 70 [2023-12-21 11:07:50,283 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 70 treesize of output 66 [2023-12-21 11:08:11,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:08:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407170905] [2023-12-21 11:08:11,716 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:08:11,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874006641] [2023-12-21 11:08:11,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874006641] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:08:11,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:08:11,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-21 11:08:11,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237332415] [2023-12-21 11:08:11,717 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:08:11,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 11:08:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:08:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 11:08:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1062, Unknown=4, NotChecked=0, Total=1190 [2023-12-21 11:08:11,718 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:08:12,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:08:12,845 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-21 11:08:12,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 11:08:12,846 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 38 [2023-12-21 11:08:12,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:08:12,847 INFO L225 Difference]: With dead ends: 63 [2023-12-21 11:08:12,847 INFO L226 Difference]: Without dead ends: 45 [2023-12-21 11:08:12,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 29.8s TimeCoverageRelationStatistics Valid=193, Invalid=1525, Unknown=4, NotChecked=0, Total=1722 [2023-12-21 11:08:12,848 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 23 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:08:12,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 63 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 336 Invalid, 1 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:08:12,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-12-21 11:08:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-12-21 11:08:12,860 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) [2023-12-21 11:08:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-12-21 11:08:12,860 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 38 [2023-12-21 11:08:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:08:12,861 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-12-21 11:08:12,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.411764705882353) internal successors, (24), 16 states have internal predecessors, (24), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 11:08:12,861 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-12-21 11:08:12,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-12-21 11:08:12,862 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:08:12,862 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] [2023-12-21 11:08:12,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 11:08:13,068 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 [2023-12-21 11:08:13,069 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:08:13,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:08:13,069 INFO L85 PathProgramCache]: Analyzing trace with hash -589022750, now seen corresponding path program 1 times [2023-12-21 11:08:13,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:08:13,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704029406] [2023-12-21 11:08:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:08:13,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:08:13,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:08:13,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1656192830] [2023-12-21 11:08:13,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:08:13,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:08:13,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:08:13,093 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) [2023-12-21 11:08:13,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 11:08:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:08:13,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 199 conjunts are in the unsatisfiable core [2023-12-21 11:08:13,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:08:13,270 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 [2023-12-21 11:08:13,646 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 148 treesize of output 136 [2023-12-21 11:09:50,430 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 [2023-12-21 11:09:54,835 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-12-21 11:09:54,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:11,163 WARN L293 SmtUtils]: Spent 15.97s on a formula simplification. DAG size of input: 144 DAG size of output: 141 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:10:30,804 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:10:30,804 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 900 treesize of output 899 [2023-12-21 11:10:34,893 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base))) (let ((.cse2 (select .cse5 c_func_to_recursive_line_27_to_35_0_~y.offset))) (let ((.cse0 (* .cse2 .cse2 .cse2 .cse2 5)) (.cse1 (* .cse2 .cse2 .cse2 .cse2 .cse2 6)) (.cse3 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2 2))) (or (not (= (mod (+ .cse0 .cse1 (* .cse2 .cse2 11) .cse3) 12) 0)) (and (= |c_func_to_recursive_line_27_to_35_0_#in~x.base| c_func_to_recursive_line_27_to_35_0_~x.base) (= c_func_to_recursive_line_27_to_35_0_~x.offset |c_func_to_recursive_line_27_to_35_0_#in~x.offset|) (let ((.cse4 (select (select (store |c_#memory_int#3| c_func_to_recursive_line_27_to_35_0_~y.base (store .cse5 c_func_to_recursive_line_27_to_35_0_~y.offset (+ .cse2 1))) |c_func_to_recursive_line_27_to_35_0_#in~y.base|) |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (= (+ (* (* .cse4 .cse4 .cse4 .cse4 .cse4) 6) (* (* .cse4 .cse4 .cse4 .cse4 .cse4 .cse4) 2) (* (* .cse4 .cse4 .cse4 .cse4) 5)) (+ (* (* .cse2 .cse2 .cse2) 120) (* (* .cse2 .cse2 .cse2 .cse2 .cse2) 12) (* .cse4 .cse4) (* .cse2 60) 12 (* 120 (* .cse2 .cse2)) (* (div (+ (* (- 1) .cse2 .cse2) .cse0 .cse1 .cse3) 12) 12) (* (* .cse2 .cse2 .cse2 .cse2) 60))))))))) is different from false [2023-12-21 11:10:42,956 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:10:51,182 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse2 (select .cse6 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse0 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2 2)) (.cse1 (* .cse2 .cse2 .cse2 .cse2 .cse2 6)) (.cse3 (* .cse2 .cse2 .cse2 .cse2 5))) (and (or (= (mod (+ .cse0 .cse1 (* .cse2 .cse2 11) .cse3) 12) 0) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (let ((.cse4 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse4 .cse4 .cse4 .cse4 .cse4 .cse4) 2) (* 6 (* .cse4 .cse4 .cse4 .cse4 .cse4)) (* 5 (* .cse4 .cse4 .cse4 .cse4))) (+ (* 12 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11|)) (* .cse4 .cse4)))))) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (or (not (let ((.cse5 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse6 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| (+ .cse2 1))) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* 120 (* .cse2 .cse2)) (* .cse5 .cse5) (* 12 (div (+ .cse0 .cse1 (* (- 1) .cse2 .cse2) .cse3) 12)) (* 120 (* .cse2 .cse2 .cse2)) (* (* .cse2 .cse2 .cse2 .cse2 .cse2) 12) (* (* .cse2 .cse2 .cse2 .cse2) 60) 12 (* .cse2 60)) (+ (* 5 (* .cse5 .cse5 .cse5 .cse5)) (* (* .cse5 .cse5 .cse5 .cse5 .cse5 .cse5) 2) (* (* .cse5 .cse5 .cse5 .cse5 .cse5) 6))))) (let ((.cse7 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse7 .cse7 .cse7 .cse7 .cse7 .cse7) 2) (* 6 (* .cse7 .cse7 .cse7 .cse7 .cse7)) (* 5 (* .cse7 .cse7 .cse7 .cse7))) (+ (* .cse7 .cse7) (* (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|) 12)))))))))) is different from false [2023-12-21 11:10:55,185 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse6 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse2 (select .cse6 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse0 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2 2)) (.cse1 (* .cse2 .cse2 .cse2 .cse2 .cse2 6)) (.cse3 (* .cse2 .cse2 .cse2 .cse2 5))) (and (or (= (mod (+ .cse0 .cse1 (* .cse2 .cse2 11) .cse3) 12) 0) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (let ((.cse4 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse4 .cse4 .cse4 .cse4 .cse4 .cse4) 2) (* 6 (* .cse4 .cse4 .cse4 .cse4 .cse4)) (* 5 (* .cse4 .cse4 .cse4 .cse4))) (+ (* 12 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11|)) (* .cse4 .cse4)))))) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (or (not (let ((.cse5 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse6 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| (+ .cse2 1))) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* 120 (* .cse2 .cse2)) (* .cse5 .cse5) (* 12 (div (+ .cse0 .cse1 (* (- 1) .cse2 .cse2) .cse3) 12)) (* 120 (* .cse2 .cse2 .cse2)) (* (* .cse2 .cse2 .cse2 .cse2 .cse2) 12) (* (* .cse2 .cse2 .cse2 .cse2) 60) 12 (* .cse2 60)) (+ (* 5 (* .cse5 .cse5 .cse5 .cse5)) (* (* .cse5 .cse5 .cse5 .cse5 .cse5 .cse5) 2) (* (* .cse5 .cse5 .cse5 .cse5 .cse5) 6))))) (let ((.cse7 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse7 .cse7 .cse7 .cse7 .cse7 .cse7) 2) (* 6 (* .cse7 .cse7 .cse7 .cse7 .cse7)) (* 5 (* .cse7 .cse7 .cse7 .cse7))) (+ (* .cse7 .cse7) (* (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|) 12)))))))))) is different from true [2023-12-21 11:11:03,283 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:11:23,572 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:11:33,080 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (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 ((.cse0 (* .cse2 .cse2 .cse2 .cse2 5)) (.cse1 (* .cse2 .cse2 .cse2 .cse2 .cse2 6)) (.cse3 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2 2))) (or (not (= (mod (+ .cse0 .cse1 (* .cse2 .cse2 11) .cse3) 12) 0)) (let ((.cse10 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse6 (select .cse10 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse4 (* .cse6 .cse6 .cse6 .cse6 .cse6 .cse6 2)) (.cse5 (* .cse6 .cse6 .cse6 .cse6 .cse6 6)) (.cse7 (* .cse6 .cse6 .cse6 .cse6 5))) (and (or (= (mod (+ .cse4 .cse5 (* .cse6 .cse6 11) .cse7) 12) 0) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (let ((.cse8 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse8 .cse8 .cse8 .cse8 .cse8 .cse8) 2) (* 6 (* .cse8 .cse8 .cse8 .cse8 .cse8)) (* 5 (* .cse8 .cse8 .cse8 .cse8))) (+ (* 12 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11|)) (* .cse8 .cse8)))))) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (or (not (let ((.cse9 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse10 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| (+ .cse6 1))) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* 120 (* .cse6 .cse6)) (* .cse9 .cse9) (* 12 (div (+ .cse4 .cse5 (* (- 1) .cse6 .cse6) .cse7) 12)) (* 120 (* .cse6 .cse6 .cse6)) (* (* .cse6 .cse6 .cse6 .cse6 .cse6) 12) (* (* .cse6 .cse6 .cse6 .cse6) 60) 12 (* .cse6 60)) (+ (* 5 (* .cse9 .cse9 .cse9 .cse9)) (* (* .cse9 .cse9 .cse9 .cse9 .cse9 .cse9) 2) (* (* .cse9 .cse9 .cse9 .cse9 .cse9) 6))))) (let ((.cse11 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse11 .cse11 .cse11 .cse11 .cse11 .cse11) 2) (* 6 (* .cse11 .cse11 .cse11 .cse11 .cse11)) (* 5 (* .cse11 .cse11 .cse11 .cse11))) (+ (* .cse11 .cse11) (* (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|) 12)))))))))) (< (select (select |c_#memory_int#2| c_func_to_recursive_line_27_to_35_0_~x.base) c_func_to_recursive_line_27_to_35_0_~x.offset) (div (+ (* (- 1) .cse2 .cse2) .cse0 .cse1 .cse3) 12))))) is different from false [2023-12-21 11:11:37,083 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (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 ((.cse0 (* .cse2 .cse2 .cse2 .cse2 5)) (.cse1 (* .cse2 .cse2 .cse2 .cse2 .cse2 6)) (.cse3 (* .cse2 .cse2 .cse2 .cse2 .cse2 .cse2 2))) (or (not (= (mod (+ .cse0 .cse1 (* .cse2 .cse2 11) .cse3) 12) 0)) (let ((.cse10 (select |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base|))) (let ((.cse6 (select .cse10 |c_func_to_recursive_line_27_to_35_0_#in~y.offset|))) (let ((.cse4 (* .cse6 .cse6 .cse6 .cse6 .cse6 .cse6 2)) (.cse5 (* .cse6 .cse6 .cse6 .cse6 .cse6 6)) (.cse7 (* .cse6 .cse6 .cse6 .cse6 5))) (and (or (= (mod (+ .cse4 .cse5 (* .cse6 .cse6 11) .cse7) 12) 0) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (let ((.cse8 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse8 .cse8 .cse8 .cse8 .cse8 .cse8) 2) (* 6 (* .cse8 .cse8 .cse8 .cse8 .cse8)) (* 5 (* .cse8 .cse8 .cse8 .cse8))) (+ (* 12 (select (select |c_#memory_int#2| |v_func_to_recursive_line_27_to_35_0_#in~x.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~x.offset_BEFORE_CALL_11|)) (* .cse8 .cse8)))))) (forall ((|v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11| Int) (|v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11| Int)) (or (not (let ((.cse9 (select (select (store |c_old(#memory_int#3)| |c_func_to_recursive_line_27_to_35_0_#in~y.base| (store .cse10 |c_func_to_recursive_line_27_to_35_0_#in~y.offset| (+ .cse6 1))) |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* 120 (* .cse6 .cse6)) (* .cse9 .cse9) (* 12 (div (+ .cse4 .cse5 (* (- 1) .cse6 .cse6) .cse7) 12)) (* 120 (* .cse6 .cse6 .cse6)) (* (* .cse6 .cse6 .cse6 .cse6 .cse6) 12) (* (* .cse6 .cse6 .cse6 .cse6) 60) 12 (* .cse6 60)) (+ (* 5 (* .cse9 .cse9 .cse9 .cse9)) (* (* .cse9 .cse9 .cse9 .cse9 .cse9 .cse9) 2) (* (* .cse9 .cse9 .cse9 .cse9 .cse9) 6))))) (let ((.cse11 (select (select |c_#memory_int#3| |v_func_to_recursive_line_27_to_35_0_#in~y.base_BEFORE_CALL_11|) |v_func_to_recursive_line_27_to_35_0_#in~y.offset_BEFORE_CALL_11|))) (= (+ (* (* .cse11 .cse11 .cse11 .cse11 .cse11 .cse11) 2) (* 6 (* .cse11 .cse11 .cse11 .cse11 .cse11)) (* 5 (* .cse11 .cse11 .cse11 .cse11))) (+ (* .cse11 .cse11) (* (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|) 12)))))))))) (< (select (select |c_#memory_int#2| c_func_to_recursive_line_27_to_35_0_~x.base) c_func_to_recursive_line_27_to_35_0_~x.offset) (div (+ (* (- 1) .cse2 .cse2) .cse0 .cse1 .cse3) 12))))) is different from true [2023-12-21 11:11:37,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704029406] [2023-12-21 11:11:37,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:37,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656192830] [2023-12-21 11:11:37,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656192830] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:37,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:37,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:11:37,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871192645] [2023-12-21 11:11:37,086 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:37,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:11:37,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:37,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:11:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=570, Unknown=15, NotChecked=150, Total=812 [2023-12-21 11:11:37,087 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:11:41,091 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:42,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:44,136 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:48,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:49,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:53,452 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:11:57,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:01,100 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:05,163 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:13,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:17,538 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:22,918 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.38s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:26,924 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:30,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:38,968 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:42,973 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:56,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:00,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:04,352 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:19,160 WARN L293 SmtUtils]: Spent 14.20s on a formula simplification. DAG size of input: 110 DAG size of output: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:13:23,203 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:28,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:32,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:13:34,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:15,310 WARN L293 SmtUtils]: Spent 40.57s on a formula simplification. DAG size of input: 82 DAG size of output: 78 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 11:14:17,688 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.38s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:22,682 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:30,712 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:32,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:36,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:44,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:48,680 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:52,691 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:14:56,696 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:00,707 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:04,717 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:08,723 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:12,738 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:16,744 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:20,639 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:24,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:28,689 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:32,714 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:36,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:15:36,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:15:36,734 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2023-12-21 11:15:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 11:15:36,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 44 [2023-12-21 11:15:36,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:15:36,735 INFO L225 Difference]: With dead ends: 57 [2023-12-21 11:15:36,735 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 11:15:36,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 174.2s TimeCoverageRelationStatistics Valid=151, Invalid=1031, Unknown=20, NotChecked=204, Total=1406 [2023-12-21 11:15:36,737 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 20 mSolverCounterUnsat, 34 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 160.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 34 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 160.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:15:36,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 99 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 296 Invalid, 34 Unknown, 0 Unchecked, 160.3s Time] [2023-12-21 11:15:36,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 11:15:36,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-12-21 11:15:36,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 9 states have call successors, (9), 7 states have call predecessors, (9), 8 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-21 11:15:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2023-12-21 11:15:36,751 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 44 [2023-12-21 11:15:36,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:15:36,753 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2023-12-21 11:15:36,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 18 states have internal predecessors, (27), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:15:36,753 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2023-12-21 11:15:36,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-21 11:15:36,754 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:15:36,754 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:15:36,768 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 11:15:36,964 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 [2023-12-21 11:15:36,964 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:15:36,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:15:36,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1814954138, now seen corresponding path program 2 times [2023-12-21 11:15:36,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:15:36,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128469210] [2023-12-21 11:15:36,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:15:36,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:15:36,987 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:15:36,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409748146] [2023-12-21 11:15:36,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:15:36,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:15:36,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:15:36,996 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) [2023-12-21 11:15:36,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 11:15:37,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:15:37,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:15:37,215 INFO L262 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 245 conjunts are in the unsatisfiable core [2023-12-21 11:15:37,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:15:37,245 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 [2023-12-21 11:15:37,248 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 [2023-12-21 11:15:44,507 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 46 treesize of output 38 [2023-12-21 11:15:44,515 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 [2023-12-21 11:15:44,690 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 11:15:44,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:16:27,637 WARN L293 SmtUtils]: Spent 39.26s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:16:48,925 WARN L293 SmtUtils]: Spent 8.77s on a formula simplification. DAG size of input: 142 DAG size of output: 124 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:16:57,394 WARN L293 SmtUtils]: Spent 8.37s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:18:19,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:18:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128469210] [2023-12-21 11:18:19,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:18:19,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409748146] [2023-12-21 11:18:19,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409748146] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:18:19,614 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:18:19,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:18:19,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436559346] [2023-12-21 11:18:19,614 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:18:19,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:18:19,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:18:19,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:18:19,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=712, Unknown=15, NotChecked=0, Total=812 [2023-12-21 11:18:19,616 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 22 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 11:18:32,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:34,726 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:39,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:44,353 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:48,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.95s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:52,937 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.43s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:18:53,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:18:53,572 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2023-12-21 11:18:53,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 11:18:53,573 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 56 [2023-12-21 11:18:53,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:18:53,574 INFO L225 Difference]: With dead ends: 65 [2023-12-21 11:18:53,574 INFO L226 Difference]: Without dead ends: 63 [2023-12-21 11:18:53,575 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 97.7s TimeCoverageRelationStatistics Valid=129, Invalid=1044, Unknown=17, NotChecked=0, Total=1190 [2023-12-21 11:18:53,575 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 502 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:18:53,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 118 Invalid, 502 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 485 Invalid, 3 Unknown, 0 Unchecked, 25.5s Time] [2023-12-21 11:18:53,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-21 11:18:53,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-12-21 11:18:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 9 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2023-12-21 11:18:53,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-12-21 11:18:53,592 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 56 [2023-12-21 11:18:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:18:53,592 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-12-21 11:18:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 16 states have (on average 1.6875) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 11:18:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-12-21 11:18:53,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-21 11:18:53,593 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:18:53,594 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:18:53,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-21 11:18:53,800 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 [2023-12-21 11:18:53,801 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:18:53,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:18:53,801 INFO L85 PathProgramCache]: Analyzing trace with hash 194684498, now seen corresponding path program 3 times [2023-12-21 11:18:53,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:18:53,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946711204] [2023-12-21 11:18:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:18:53,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:18:53,832 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:18:53,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [27121701] [2023-12-21 11:18:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:18:53,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:18:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:18:53,853 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) [2023-12-21 11:18:53,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 11:18:54,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 11:18:54,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:18:54,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 182 conjunts are in the unsatisfiable core [2023-12-21 11:18:54,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:18:54,767 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 [2023-12-21 11:18:54,775 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 [2023-12-21 11:18:55,165 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 113 treesize of output 105 [2023-12-21 11:18:55,172 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 221 treesize of output 85 [2023-12-21 11:18:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 31 proven. 25 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2023-12-21 11:18:55,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:18:57,863 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 108 [2023-12-21 11:18:57,867 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 194 treesize of output 186 [2023-12-21 11:18:58,780 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 108 [2023-12-21 11:18:58,785 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 194 treesize of output 186 [2023-12-21 11:18:59,350 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 496 treesize of output 492 [2023-12-21 11:18:59,364 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 322 treesize of output 186 [2023-12-21 11:19:05,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946711204] [2023-12-21 11:19:05,001 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:05,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27121701] [2023-12-21 11:19:05,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27121701] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:05,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:05,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-21 11:19:05,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967239093] [2023-12-21 11:19:05,001 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:05,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 11:19:05,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:05,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 11:19:05,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2023-12-21 11:19:05,003 INFO L87 Difference]: Start difference. First operand 55 states and 64 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) [2023-12-21 11:19:07,891 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:19:08,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:08,334 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2023-12-21 11:19:08,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 11:19:08,334 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 68 [2023-12-21 11:19:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:08,338 INFO L225 Difference]: With dead ends: 61 [2023-12-21 11:19:08,338 INFO L226 Difference]: Without dead ends: 57 [2023-12-21 11:19:08,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:19:08,339 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 30 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:08,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 62 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-12-21 11:19:08,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-21 11:19:08,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 47. [2023-12-21 11:19:08,357 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) [2023-12-21 11:19:08,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2023-12-21 11:19:08,357 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 68 [2023-12-21 11:19:08,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:08,358 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2023-12-21 11:19:08,358 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) [2023-12-21 11:19:08,358 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2023-12-21 11:19:08,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-12-21 11:19:08,359 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:08,359 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] [2023-12-21 11:19:08,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:08,569 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 [2023-12-21 11:19:08,570 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:08,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash -84856669, now seen corresponding path program 2 times [2023-12-21 11:19:08,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:08,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978645379] [2023-12-21 11:19:08,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:08,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:08,585 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:08,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [135153881] [2023-12-21 11:19:08,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:19:08,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:08,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:08,587 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) [2023-12-21 11:19:08,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 11:19:08,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:19:08,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:08,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 127 conjunts are in the unsatisfiable core [2023-12-21 11:19:08,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:08,949 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 [2023-12-21 11:19:08,976 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 [2023-12-21 11:19:08,980 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 [2023-12-21 11:19:09,316 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 [2023-12-21 11:19:09,538 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 [2023-12-21 11:19:09,688 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 11:19:09,688 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:19:11,128 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 [2023-12-21 11:19:11,133 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 [2023-12-21 11:19:12,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978645379] [2023-12-21 11:19:12,653 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:12,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135153881] [2023-12-21 11:19:12,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135153881] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:12,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:12,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:19:12,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993798418] [2023-12-21 11:19:12,653 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:12,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:19:12,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:12,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:19:12,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:19:12,655 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 20 states, 16 states have (on average 1.6875) internal successors, (27), 18 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) [2023-12-21 11:19:13,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:13,353 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-12-21 11:19:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:19:13,354 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 18 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 [2023-12-21 11:19:13,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:13,355 INFO L225 Difference]: With dead ends: 61 [2023-12-21 11:19:13,355 INFO L226 Difference]: Without dead ends: 49 [2023-12-21 11:19:13,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=143, Invalid=1263, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 11:19:13,356 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:13,356 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 67 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 391 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:19:13,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-21 11:19:13,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-21 11:19:13,370 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) [2023-12-21 11:19:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2023-12-21 11:19:13,371 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 50 [2023-12-21 11:19:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2023-12-21 11:19:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.6875) internal successors, (27), 18 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) [2023-12-21 11:19:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2023-12-21 11:19:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-12-21 11:19:13,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:13,372 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] [2023-12-21 11:19:13,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:13,579 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 [2023-12-21 11:19:13,579 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:13,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1187581275, now seen corresponding path program 3 times [2023-12-21 11:19:13,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:13,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434397357] [2023-12-21 11:19:13,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:13,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:13,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:13,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [659547326] [2023-12-21 11:19:13,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:19:13,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:13,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:13,614 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:19:13,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 11:19:14,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 11:19:14,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:14,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 175 conjunts are in the unsatisfiable core [2023-12-21 11:19:14,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:14,611 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 [2023-12-21 11:19:14,627 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 [2023-12-21 11:19:14,634 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 [2023-12-21 11:19:15,105 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 [2023-12-21 11:19:15,388 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 [2023-12-21 11:19:15,554 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 11:19:15,554 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:19:18,414 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 39 [2023-12-21 11:19:18,419 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 39 treesize of output 35 [2023-12-21 11:19:19,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434397357] [2023-12-21 11:19:19,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:19,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659547326] [2023-12-21 11:19:19,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659547326] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:19,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:19,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 11:19:19,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129054226] [2023-12-21 11:19:19,573 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:19,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 11:19:19,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:19,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 11:19:19,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=848, Unknown=0, NotChecked=0, Total=930 [2023-12-21 11:19:19,574 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 11:19:20,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:20,496 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-21 11:19:20,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 11:19:20,496 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 62 [2023-12-21 11:19:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:20,497 INFO L225 Difference]: With dead ends: 63 [2023-12-21 11:19:20,497 INFO L226 Difference]: Without dead ends: 51 [2023-12-21 11:19:20,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=1709, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 11:19:20,498 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:20,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 110 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:19:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-21 11:19:20,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-21 11:19:20,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 8 states have call successors, (8), 7 states have call predecessors, (8), 8 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 11:19:20,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-21 11:19:20,515 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 62 [2023-12-21 11:19:20,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:20,515 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-21 11:19:20,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.736842105263158) internal successors, (33), 21 states have internal predecessors, (33), 8 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2023-12-21 11:19:20,515 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-21 11:19:20,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2023-12-21 11:19:20,516 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:20,516 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:19:20,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:20,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 11:19:20,728 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:20,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:20,729 INFO L85 PathProgramCache]: Analyzing trace with hash 249596179, now seen corresponding path program 4 times [2023-12-21 11:19:20,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:20,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898202957] [2023-12-21 11:19:20,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:20,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:20,749 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:20,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398207564] [2023-12-21 11:19:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:19:20,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:20,751 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:19:20,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 11:19:21,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:19:21,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:21,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 551 conjuncts, 182 conjunts are in the unsatisfiable core [2023-12-21 11:19:21,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:21,066 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 [2023-12-21 11:19:21,069 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 [2023-12-21 11:19:21,544 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 [2023-12-21 11:19:21,850 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 [2023-12-21 11:19:22,001 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 33 proven. 41 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2023-12-21 11:19:22,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:19:23,566 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 43 [2023-12-21 11:19:24,856 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:19:24,856 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 80 treesize of output 83 [2023-12-21 11:19:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898202957] [2023-12-21 11:19:25,032 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398207564] [2023-12-21 11:19:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398207564] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:25,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:19:25,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474099333] [2023-12-21 11:19:25,032 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:25,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:19:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:25,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:19:25,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:19:25,034 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 20 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 11:19:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:25,782 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-21 11:19:25,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:19:25,783 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 74 [2023-12-21 11:19:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:25,783 INFO L225 Difference]: With dead ends: 65 [2023-12-21 11:19:25,783 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 11:19:25,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=121, Invalid=1069, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:19:25,784 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:25,784 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 115 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 452 Invalid, 1 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:19:25,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 11:19:25,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-21 11:19:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 8 states have call successors, (8), 7 states have call predecessors, (8), 9 states have return successors, (13), 10 states have call predecessors, (13), 7 states have call successors, (13) [2023-12-21 11:19:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-21 11:19:25,798 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 74 [2023-12-21 11:19:25,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:25,798 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-21 11:19:25,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 16 states have (on average 1.8125) internal successors, (29), 18 states have internal predecessors, (29), 7 states have call successors, (7), 4 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2023-12-21 11:19:25,799 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-21 11:19:25,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 11:19:25,799 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:25,800 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:19:25,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:26,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 11:19:26,004 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:26,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:26,005 INFO L85 PathProgramCache]: Analyzing trace with hash -2108660789, now seen corresponding path program 5 times [2023-12-21 11:19:26,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:26,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222080314] [2023-12-21 11:19:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:26,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:26,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:26,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1950945663] [2023-12-21 11:19:26,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 11:19:26,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:26,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:26,026 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:19:26,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 11:19:27,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 11:19:27,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:27,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 249 conjunts are in the unsatisfiable core [2023-12-21 11:19:27,150 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:27,157 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 [2023-12-21 11:19:27,179 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 [2023-12-21 11:19:27,185 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 [2023-12-21 11:19:27,798 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 [2023-12-21 11:19:28,195 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 [2023-12-21 11:19:28,375 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 46 proven. 65 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-21 11:19:28,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:19:32,498 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 [2023-12-21 11:19:32,503 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 [2023-12-21 11:19:34,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222080314] [2023-12-21 11:19:34,552 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:34,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950945663] [2023-12-21 11:19:34,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950945663] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:34,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:34,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 11:19:34,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832810245] [2023-12-21 11:19:34,552 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:34,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 11:19:34,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:34,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 11:19:34,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=908, Unknown=0, NotChecked=0, Total=992 [2023-12-21 11:19:34,554 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 24 states, 20 states have (on average 1.65) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 11:19:35,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:35,602 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-12-21 11:19:35,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:19:35,602 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) Word has length 86 [2023-12-21 11:19:35,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:35,603 INFO L225 Difference]: With dead ends: 67 [2023-12-21 11:19:35,603 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 11:19:35,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=1716, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 11:19:35,605 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 10 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:35,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 151 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 543 Invalid, 1 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:19:35,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 11:19:35,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-21 11:19:35,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 10 states have return successors, (14), 11 states have call predecessors, (14), 7 states have call successors, (14) [2023-12-21 11:19:35,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-21 11:19:35,621 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 86 [2023-12-21 11:19:35,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:35,621 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-21 11:19:35,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.65) internal successors, (33), 22 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 9 states have return successors, (10), 8 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 11:19:35,622 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-21 11:19:35,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2023-12-21 11:19:35,623 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:35,623 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:19:35,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:35,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 11:19:35,833 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:35,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1245797763, now seen corresponding path program 6 times [2023-12-21 11:19:35,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:35,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651329107] [2023-12-21 11:19:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:35,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:35,854 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:35,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996974548] [2023-12-21 11:19:35,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 11:19:35,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:35,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:35,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:19:35,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 11:19:46,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-12-21 11:19:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:46,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 285 conjunts are in the unsatisfiable core [2023-12-21 11:19:46,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:46,865 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 [2023-12-21 11:19:46,883 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 [2023-12-21 11:19:46,889 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 [2023-12-21 11:19:47,638 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 [2023-12-21 11:19:48,105 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 [2023-12-21 11:19:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 50 proven. 93 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-12-21 11:19:48,367 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:19:53,096 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 39 [2023-12-21 11:19:53,103 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 39 treesize of output 35 [2023-12-21 11:19:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:19:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651329107] [2023-12-21 11:19:56,343 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:19:56,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996974548] [2023-12-21 11:19:56,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996974548] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:19:56,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:19:56,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-21 11:19:56,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538822484] [2023-12-21 11:19:56,343 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:19:56,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 11:19:56,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:19:56,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 11:19:56,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 11:19:56,345 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 11:19:57,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:19:57,626 INFO L93 Difference]: Finished difference Result 69 states and 74 transitions. [2023-12-21 11:19:57,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:19:57,628 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 98 [2023-12-21 11:19:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:19:57,629 INFO L225 Difference]: With dead ends: 69 [2023-12-21 11:19:57,629 INFO L226 Difference]: Without dead ends: 57 [2023-12-21 11:19:57,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=191, Invalid=1971, Unknown=0, NotChecked=0, Total=2162 [2023-12-21 11:19:57,631 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 11:19:57,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 188 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 644 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 11:19:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-21 11:19:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-21 11:19:57,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 11 states have return successors, (15), 12 states have call predecessors, (15), 7 states have call successors, (15) [2023-12-21 11:19:57,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-21 11:19:57,646 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 98 [2023-12-21 11:19:57,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:19:57,647 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-21 11:19:57,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 24 states have internal predecessors, (35), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2023-12-21 11:19:57,647 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-21 11:19:57,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-12-21 11:19:57,648 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:19:57,648 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:19:57,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-21 11:19:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:57,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:19:57,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:19:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1709979195, now seen corresponding path program 7 times [2023-12-21 11:19:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:19:57,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626428528] [2023-12-21 11:19:57,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:19:57,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:19:57,894 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:19:57,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314377866] [2023-12-21 11:19:57,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 11:19:57,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:19:57,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:19:57,896 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:19:57,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 11:19:58,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:19:58,490 INFO L262 TraceCheckSpWp]: Trace formula consists of 954 conjuncts, 309 conjunts are in the unsatisfiable core [2023-12-21 11:19:58,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:58,511 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 [2023-12-21 11:19:58,526 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 [2023-12-21 11:19:58,530 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 [2023-12-21 11:19:59,293 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 [2023-12-21 11:19:59,832 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 [2023-12-21 11:20:00,126 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 60 proven. 79 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2023-12-21 11:20:00,127 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:20:05,461 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 39 [2023-12-21 11:20:05,468 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 39 treesize of output 35 [2023-12-21 11:20:09,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:20:09,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626428528] [2023-12-21 11:20:09,518 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:20:09,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314377866] [2023-12-21 11:20:09,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314377866] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:20:09,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:20:09,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 11:20:09,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759576600] [2023-12-21 11:20:09,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:20:09,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 11:20:09,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:20:09,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 11:20:09,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1097, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:20:09,519 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 10 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-21 11:20:10,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:20:10,653 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2023-12-21 11:20:10,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:20:10,653 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 10 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) Word has length 110 [2023-12-21 11:20:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:20:10,654 INFO L225 Difference]: With dead ends: 71 [2023-12-21 11:20:10,654 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 11:20:10,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=172, Invalid=1808, Unknown=0, NotChecked=0, Total=1980 [2023-12-21 11:20:10,656 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:20:10,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 171 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 552 Invalid, 1 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 11:20:10,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 11:20:10,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-21 11:20:10,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 12 states have return successors, (16), 13 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-21 11:20:10,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-12-21 11:20:10,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 110 [2023-12-21 11:20:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:20:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-12-21 11:20:10,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 7 states have call successors, (7), 4 states have call predecessors, (7), 10 states have return successors, (11), 10 states have call predecessors, (11), 6 states have call successors, (11) [2023-12-21 11:20:10,670 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-12-21 11:20:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-12-21 11:20:10,671 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:20:10,671 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:20:10,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-21 11:20:10,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 11:20:10,886 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:20:10,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:20:10,886 INFO L85 PathProgramCache]: Analyzing trace with hash 110734835, now seen corresponding path program 8 times [2023-12-21 11:20:10,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:20:10,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747565627] [2023-12-21 11:20:10,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:20:10,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:20:10,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:20:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203685417] [2023-12-21 11:20:10,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:20:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:20:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:20:10,914 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:20:10,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 11:20:11,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:20:11,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:20:11,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 331 conjunts are in the unsatisfiable core [2023-12-21 11:20:11,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:20:11,603 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 [2023-12-21 11:20:11,628 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 [2023-12-21 11:20:11,633 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 [2023-12-21 11:20:12,516 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 [2023-12-21 11:20:13,161 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 [2023-12-21 11:20:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 61 proven. 113 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2023-12-21 11:20:13,409 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:20:19,240 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 [2023-12-21 11:20:19,245 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 [2023-12-21 11:20:22,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:20:22,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747565627] [2023-12-21 11:20:22,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:20:22,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203685417] [2023-12-21 11:20:22,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203685417] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:20:22,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:20:22,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 11:20:22,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232940193] [2023-12-21 11:20:22,156 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:20:22,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 11:20:22,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:20:22,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 11:20:22,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:20:22,158 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 26 states, 22 states have (on average 1.5) internal successors, (33), 24 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 11 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-21 11:20:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:20:23,354 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2023-12-21 11:20:23,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:20:23,355 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 24 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 11 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) Word has length 122 [2023-12-21 11:20:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:20:23,355 INFO L225 Difference]: With dead ends: 73 [2023-12-21 11:20:23,355 INFO L226 Difference]: Without dead ends: 61 [2023-12-21 11:20:23,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=153, Invalid=1739, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 11:20:23,356 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 11 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 11:20:23,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 179 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 657 Invalid, 1 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 11:20:23,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-21 11:20:23,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-21 11:20:23,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 13 states have return successors, (17), 14 states have call predecessors, (17), 7 states have call successors, (17) [2023-12-21 11:20:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-12-21 11:20:23,368 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 122 [2023-12-21 11:20:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:20:23,368 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-12-21 11:20:23,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 22 states have (on average 1.5) internal successors, (33), 24 states have internal predecessors, (33), 7 states have call successors, (7), 4 states have call predecessors, (7), 11 states have return successors, (12), 11 states have call predecessors, (12), 6 states have call successors, (12) [2023-12-21 11:20:23,368 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-12-21 11:20:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-12-21 11:20:23,369 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:20:23,369 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:20:23,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-21 11:20:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 11:20:23,570 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:20:23,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:20:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1805812907, now seen corresponding path program 9 times [2023-12-21 11:20:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:20:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488798923] [2023-12-21 11:20:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:20:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:20:23,594 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:20:23,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [96065334] [2023-12-21 11:20:23,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:20:23,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:20:23,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:20:23,596 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:20:23,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process Received shutdown request... [2023-12-21 11:21:42,045 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 [2023-12-21 11:21:42,045 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:21:43,246 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forcibly destroying the process [2023-12-21 11:21:43,247 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 11:21:43,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 137 [2023-12-21 11:21:43,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Timeout or Toolchain cancelled by user [2023-12-21 11:21:43,257 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:21:43,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-12-21 11:21:43,258 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 135 with TraceHistMax 12,while AutomatonFreeRefinementEngine was Timeout during CAMEL. [2023-12-21 11:21:43,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 11:21:43,280 INFO L445 BasicCegarLoop]: Path program histogram: [9, 3, 1, 1, 1, 1, 1] [2023-12-21 11:21:43,283 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 11:21:43,285 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:21:43 BoogieIcfgContainer [2023-12-21 11:21:43,285 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 11:21:43,285 INFO L158 Benchmark]: Toolchain (without parser) took 873246.62ms. Allocated memory was 186.6MB in the beginning and 308.3MB in the end (delta: 121.6MB). Free memory was 158.7MB in the beginning and 181.0MB in the end (delta: -22.3MB). Peak memory consumption was 100.9MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,285 INFO L158 Benchmark]: CDTParser took 0.49ms. Allocated memory is still 186.6MB. Free memory was 143.1MB in the beginning and 142.9MB in the end (delta: 206.5kB). There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:21:43,285 INFO L158 Benchmark]: CACSL2BoogieTranslator took 220.33ms. Allocated memory is still 186.6MB. Free memory was 158.2MB in the beginning and 146.5MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.89ms. Allocated memory is still 186.6MB. Free memory was 146.5MB in the beginning and 144.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,286 INFO L158 Benchmark]: Boogie Preprocessor took 36.26ms. Allocated memory is still 186.6MB. Free memory was 144.6MB in the beginning and 142.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,286 INFO L158 Benchmark]: RCFGBuilder took 442.07ms. Allocated memory is still 186.6MB. Free memory was 142.5MB in the beginning and 124.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,286 INFO L158 Benchmark]: TraceAbstraction took 872514.12ms. Allocated memory was 186.6MB in the beginning and 308.3MB in the end (delta: 121.6MB). Free memory was 124.2MB in the beginning and 181.0MB in the end (delta: -56.8MB). Peak memory consumption was 66.3MB. Max. memory is 8.0GB. [2023-12-21 11:21:43,287 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.49ms. Allocated memory is still 186.6MB. Free memory was 143.1MB in the beginning and 142.9MB in the end (delta: 206.5kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 220.33ms. Allocated memory is still 186.6MB. Free memory was 158.2MB in the beginning and 146.5MB in the end (delta: 11.7MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.89ms. Allocated memory is still 186.6MB. Free memory was 146.5MB in the beginning and 144.6MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 36.26ms. Allocated memory is still 186.6MB. Free memory was 144.6MB in the beginning and 142.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 442.07ms. Allocated memory is still 186.6MB. Free memory was 142.5MB in the beginning and 124.6MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * TraceAbstraction took 872514.12ms. Allocated memory was 186.6MB in the beginning and 308.3MB in the end (delta: 121.6MB). Free memory was 124.2MB in the beginning and 181.0MB in the end (delta: -56.8MB). Peak memory consumption was 66.3MB. 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 135 with TraceHistMax 12,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: 872.5s, OverallIterations: 17, TraceHistogramMax: 12, PathProgramHistogramMax: 9, EmptinessCheckTime: 0.0s, AutomataDifference: 305.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 47 mSolverCounterUnknown, 426 SdHoareTripleChecker+Valid, 209.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 410 mSDsluCounter, 1658 SdHoareTripleChecker+Invalid, 208.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1455 mSDsCounter, 221 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5783 IncrementalHoareTripleChecker+Invalid, 6051 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 221 mSolverCounterUnsat, 203 mSDtfsCounter, 5783 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1263 GetRequests, 735 SyntacticMatches, 9 SemanticMatches, 519 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 3844 ImplicationChecksByTransitivity, 331.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=16, InterpolantAutomatonStates: 282, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.6s SsaConstructionTime, 14.6s SatisfiabilityAnalysisTime, 466.0s InterpolantComputationTime, 904 NumberOfCodeBlocks, 891 NumberOfCodeBlocksAsserted, 42 NumberOfCheckSat, 916 ConstructedInterpolants, 44 QuantifiedInterpolants, 24821 SizeOfPredicates, 755 NumberOfNonLiveVariables, 8152 ConjunctsInSsa, 2789 ConjunctsInUnsatCore, 18 InterpolantComputations, 2 PerfectInterpolantSequences, 1418/1949 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