/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_ps4-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 11:05:45,691 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 11:05:45,759 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 11:05:45,762 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 11:05:45,763 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 11:05:45,788 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 11:05:45,789 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 11:05:45,790 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 11:05:45,790 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 11:05:45,794 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 11:05:45,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 11:05:45,795 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 11:05:45,795 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 11:05:45,796 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 11:05:45,796 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 11:05:45,796 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 11:05:45,796 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 11:05:45,797 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 11:05:45,797 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 11:05:45,798 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 11:05:45,798 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 11:05:45,799 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 11:05:45,799 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 11:05:45,799 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 11:05:45,799 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 11:05:45,800 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 11:05:45,800 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 11:05:45,800 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 11:05:45,801 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 11:05:45,801 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 11:05:45,801 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 11:05:45,801 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 11:05:45,801 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:05:45,802 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 11:05:45,802 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 11:05:45,803 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 11:05:45,803 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 11:05:46,017 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 11:05:46,037 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 11:05:46,039 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 11:05:46,039 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 11:05:46,040 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 11:05:46,040 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-21 11:05:47,136 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 11:05:47,302 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 11:05:47,303 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursified_nla-digbench/recursified_ps4-ll.c [2023-12-21 11:05:47,310 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3492848c6/54ba4d7a06d840988b013ece843bd1be/FLAG04b06b162 [2023-12-21 11:05:47,323 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3492848c6/54ba4d7a06d840988b013ece843bd1be [2023-12-21 11:05:47,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 11:05:47,327 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 11:05:47,329 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 11:05:47,329 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 11:05:47,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 11:05:47,333 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,334 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d115306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47, skipping insertion in model container [2023-12-21 11:05:47,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,355 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 11:05:47,490 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_ps4-ll.c[987,1000] [2023-12-21 11:05:47,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:05:47,515 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 11:05:47,526 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_ps4-ll.c[987,1000] [2023-12-21 11:05:47,536 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 11:05:47,547 INFO L206 MainTranslator]: Completed translation [2023-12-21 11:05:47,548 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47 WrapperNode [2023-12-21 11:05:47,548 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 11:05:47,548 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 11:05:47,549 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 11:05:47,549 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 11:05:47,557 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,562 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,577 INFO L138 Inliner]: procedures = 16, calls = 63, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2023-12-21 11:05:47,577 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 11:05:47,577 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 11:05:47,578 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 11:05:47,578 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 11:05:47,584 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,587 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,597 INFO L175 MemorySlicer]: Split 41 memory accesses to 5 slices as follows [2, 5, 27, 3, 4]. 66 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, 1, 2]. [2023-12-21 11:05:47,598 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,598 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,603 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,604 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,606 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,607 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,609 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 11:05:47,610 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 11:05:47,610 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 11:05:47,610 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 11:05:47,611 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (1/1) ... [2023-12-21 11:05:47,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 11:05:47,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:47,637 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 11:05:47,652 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 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-12-21 11:05:47,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 11:05:47,672 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 11:05:47,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure func_to_recursive_line_26_to_34_0 [2023-12-21 11:05:47,673 INFO L138 BoogieDeclarations]: Found implementation of procedure func_to_recursive_line_26_to_34_0 [2023-12-21 11:05:47,673 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 11:05:47,674 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 11:05:47,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-12-21 11:05:47,751 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 11:05:47,753 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 11:05:47,944 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 11:05:47,966 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 11:05:47,966 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 11:05:47,966 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:05:47 BoogieIcfgContainer [2023-12-21 11:05:47,966 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 11:05:47,968 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 11:05:47,968 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 11:05:47,971 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 11:05:47,971 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 11:05:47" (1/3) ... [2023-12-21 11:05:47,972 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cab164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:05:47, skipping insertion in model container [2023-12-21 11:05:47,972 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 11:05:47" (2/3) ... [2023-12-21 11:05:47,973 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4cab164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 11:05:47, skipping insertion in model container [2023-12-21 11:05:47,973 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 11:05:47" (3/3) ... [2023-12-21 11:05:47,974 INFO L112 eAbstractionObserver]: Analyzing ICFG recursified_ps4-ll.c [2023-12-21 11:05:47,988 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 11:05:47,988 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 11:05:48,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 11:05:48,033 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;@984d52d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 11:05:48,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 11:05:48,035 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 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 11:05:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-12-21 11:05:48,041 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:48,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:48,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:48,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:48,046 INFO L85 PathProgramCache]: Analyzing trace with hash -32795157, now seen corresponding path program 1 times [2023-12-21 11:05:48,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:48,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392716472] [2023-12-21 11:05:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:48,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:48,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:48,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [823516915] [2023-12-21 11:05:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:48,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:48,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:48,168 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 11:05:48,189 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 11:05:48,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:48,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 46 conjunts are in the unsatisfiable core [2023-12-21 11:05:48,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:48,370 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 11:05:48,376 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 11:05:48,572 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 11:05:48,572 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 11:05:48,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392716472] [2023-12-21 11:05:48,573 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:48,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823516915] [2023-12-21 11:05:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823516915] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 11:05:48,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 11:05:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 11:05:48,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268108815] [2023-12-21 11:05:48,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 11:05:48,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 11:05:48,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:48,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 11:05:48,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-12-21 11:05:48,600 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 15 states have internal predecessors, (17), 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 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:05:48,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:48,857 INFO L93 Difference]: Finished difference Result 58 states and 80 transitions. [2023-12-21 11:05:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 11:05:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-12-21 11:05:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:48,867 INFO L225 Difference]: With dead ends: 58 [2023-12-21 11:05:48,867 INFO L226 Difference]: Without dead ends: 35 [2023-12-21 11:05:48,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-12-21 11:05:48,877 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:48,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 80 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:05:48,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-12-21 11:05:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2023-12-21 11:05:48,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.15) internal successors, (23), 22 states have internal predecessors, (23), 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 11:05:48,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-12-21 11:05:48,913 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 8 [2023-12-21 11:05:48,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:48,913 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-12-21 11:05:48,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 11:05:48,913 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-12-21 11:05:48,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 11:05:48,915 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:48,915 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:48,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 11:05:49,121 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 11:05:49,121 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:49,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:49,122 INFO L85 PathProgramCache]: Analyzing trace with hash -354243652, now seen corresponding path program 1 times [2023-12-21 11:05:49,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:49,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914454341] [2023-12-21 11:05:49,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:49,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:49,165 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:49,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1953070668] [2023-12-21 11:05:49,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:49,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:49,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:49,170 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 11:05:49,190 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 11:05:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:49,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 85 conjunts are in the unsatisfiable core [2023-12-21 11:05:49,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:49,320 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 11:05:49,324 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 11:05:49,551 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 35 treesize of output 26 [2023-12-21 11:05:49,561 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 11:05:49,714 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 11:05:49,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:49,972 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 11:05:49,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914454341] [2023-12-21 11:05:49,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:49,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953070668] [2023-12-21 11:05:49,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953070668] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:05:49,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:05:49,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2023-12-21 11:05:49,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562004821] [2023-12-21 11:05:49,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:49,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:05:49,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:49,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:05:49,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2023-12-21 11:05:49,978 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:05:50,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:50,670 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2023-12-21 11:05:50,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:05:50,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-21 11:05:50,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:50,674 INFO L225 Difference]: With dead ends: 61 [2023-12-21 11:05:50,674 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 11:05:50,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-21 11:05:50,678 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 63 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:50,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 130 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 11:05:50,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 11:05:50,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 47. [2023-12-21 11:05:50,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 33 states have internal predecessors, (34), 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 11:05:50,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2023-12-21 11:05:50,699 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 18 [2023-12-21 11:05:50,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:50,699 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2023-12-21 11:05:50,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.6) internal successors, (24), 13 states have internal predecessors, (24), 7 states have call successors, (8), 7 states have call predecessors, (8), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:05:50,699 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2023-12-21 11:05:50,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-12-21 11:05:50,700 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:50,700 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:05:50,712 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 11:05:50,907 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 11:05:50,908 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:50,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:50,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1904549241, now seen corresponding path program 1 times [2023-12-21 11:05:50,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:50,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643149827] [2023-12-21 11:05:50,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:50,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:50,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:50,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1190243437] [2023-12-21 11:05:50,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:50,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:50,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:50,947 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 11:05:50,965 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 11:05:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:51,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 11:05:51,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:51,035 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 11:05:51,040 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 11:05:51,088 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 7 treesize of output 3 [2023-12-21 11:05:51,111 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 11:05:51,111 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:51,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643149827] [2023-12-21 11:05:51,335 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:51,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190243437] [2023-12-21 11:05:51,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190243437] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:05:51,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:05:51,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-21 11:05:51,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813947433] [2023-12-21 11:05:51,336 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:51,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 11:05:51,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:51,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 11:05:51,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-12-21 11:05:51,338 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:05:51,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:05:51,487 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2023-12-21 11:05:51,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 11:05:51,488 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2023-12-21 11:05:51,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:05:51,489 INFO L225 Difference]: With dead ends: 59 [2023-12-21 11:05:51,489 INFO L226 Difference]: Without dead ends: 57 [2023-12-21 11:05:51,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-12-21 11:05:51,491 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 11:05:51,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 50 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 11:05:51,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-21 11:05:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2023-12-21 11:05:51,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 10 states have return successors, (14), 9 states have call predecessors, (14), 8 states have call successors, (14) [2023-12-21 11:05:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 62 transitions. [2023-12-21 11:05:51,502 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 62 transitions. Word has length 18 [2023-12-21 11:05:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:05:51,503 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 62 transitions. [2023-12-21 11:05:51,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 11:05:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 62 transitions. [2023-12-21 11:05:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-12-21 11:05:51,504 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:05:51,504 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] [2023-12-21 11:05:51,510 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 11:05:51,710 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 11:05:51,711 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:05:51,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:05:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash -956929769, now seen corresponding path program 1 times [2023-12-21 11:05:51,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:05:51,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267500524] [2023-12-21 11:05:51,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:51,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:05:51,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:05:51,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535048017] [2023-12-21 11:05:51,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:05:51,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:05:51,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:05:51,736 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 11:05:51,754 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 11:05:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:05:51,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 81 conjunts are in the unsatisfiable core [2023-12-21 11:05:51,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:05:51,849 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 11:05:51,853 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 11:05:52,226 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 117 treesize of output 45 [2023-12-21 11:05:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 11:05:52,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:05:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 11:05:55,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:05:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267500524] [2023-12-21 11:05:55,612 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:05:55,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535048017] [2023-12-21 11:05:55,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535048017] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 11:05:55,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 11:05:55,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-12-21 11:05:55,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050754292] [2023-12-21 11:05:55,614 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 11:05:55,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:05:55,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:05:55,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:05:55,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2023-12-21 11:05:55,616 INFO L87 Difference]: Start difference. First operand 55 states and 62 transitions. Second operand has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:05:57,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-12-21 11:06:00,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:06:01,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:01,228 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2023-12-21 11:06:01,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 11:06:01,228 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) Word has length 24 [2023-12-21 11:06:01,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:01,230 INFO L225 Difference]: With dead ends: 71 [2023-12-21 11:06:01,230 INFO L226 Difference]: Without dead ends: 49 [2023-12-21 11:06:01,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=227, Invalid=1255, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 11:06:01,232 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 59 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 39 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:01,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 55 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 214 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2023-12-21 11:06:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-21 11:06:01,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-12-21 11:06:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.096774193548387) internal successors, (34), 33 states have internal predecessors, (34), 9 states have call successors, (9), 6 states have call predecessors, (9), 8 states have return successors, (12), 9 states have call predecessors, (12), 7 states have call successors, (12) [2023-12-21 11:06:01,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2023-12-21 11:06:01,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 24 [2023-12-21 11:06:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:01,244 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2023-12-21 11:06:01,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 20 states have internal predecessors, (33), 8 states have call successors, (8), 5 states have call predecessors, (8), 6 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2023-12-21 11:06:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2023-12-21 11:06:01,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-12-21 11:06:01,245 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:01,245 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:06:01,251 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 11:06:01,446 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 11:06:01,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:01,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash 2114078499, now seen corresponding path program 1 times [2023-12-21 11:06:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:01,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422919582] [2023-12-21 11:06:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:01,478 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:01,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326127635] [2023-12-21 11:06:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:01,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:01,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:01,485 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 11:06:01,504 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 11:06:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:06:01,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 101 conjunts are in the unsatisfiable core [2023-12-21 11:06:01,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:01,613 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 11:06:01,618 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 11:06:01,623 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 11:06:01,853 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 11:06:02,047 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 11:06:02,135 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-12-21 11:06:02,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:03,109 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2023-12-21 11:06:03,115 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 33 [2023-12-21 11:06:15,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:15,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422919582] [2023-12-21 11:06:15,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:15,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326127635] [2023-12-21 11:06:15,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326127635] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:15,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:15,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:06:15,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989741027] [2023-12-21 11:06:15,660 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:15,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:06:15,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:15,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:06:15,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=572, Unknown=2, NotChecked=0, Total=650 [2023-12-21 11:06:15,662 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:06:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:16,146 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2023-12-21 11:06:16,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 11:06:16,146 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 30 [2023-12-21 11:06:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:16,147 INFO L225 Difference]: With dead ends: 55 [2023-12-21 11:06:16,147 INFO L226 Difference]: Without dead ends: 43 [2023-12-21 11:06:16,148 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=133, Invalid=987, Unknown=2, NotChecked=0, Total=1122 [2023-12-21 11:06:16,149 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:16,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:06:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-12-21 11:06:16,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-12-21 11:06:16,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 29 states have internal predecessors, (30), 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 11:06:16,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2023-12-21 11:06:16,159 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 30 [2023-12-21 11:06:16,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:16,159 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2023-12-21 11:06:16,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.5) internal successors, (21), 14 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 11:06:16,160 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2023-12-21 11:06:16,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 11:06:16,160 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:16,161 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:06:16,172 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 11:06:16,369 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 11:06:16,370 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:16,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1208091455, now seen corresponding path program 2 times [2023-12-21 11:06:16,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:16,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232105137] [2023-12-21 11:06:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:16,387 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:16,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [486312395] [2023-12-21 11:06:16,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:06:16,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:16,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:16,389 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 11:06:16,396 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 11:06:16,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:06:16,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:06:16,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 139 conjunts are in the unsatisfiable core [2023-12-21 11:06:16,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:16,623 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 11:06:16,631 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 11:06:16,633 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 11:06:17,012 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 11:06:17,249 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 11:06:17,322 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-12-21 11:06:17,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:19,064 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 11:06:19,074 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 11:06:19,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232105137] [2023-12-21 11:06:19,622 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486312395] [2023-12-21 11:06:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486312395] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:19,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:19,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-21 11:06:19,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141970203] [2023-12-21 11:06:19,623 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 11:06:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 11:06:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2023-12-21 11:06:19,624 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:06:20,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:20,107 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2023-12-21 11:06:20,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-12-21 11:06:20,107 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 42 [2023-12-21 11:06:20,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:20,108 INFO L225 Difference]: With dead ends: 55 [2023-12-21 11:06:20,108 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 11:06:20,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:06:20,109 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:20,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 53 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 11:06:20,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 11:06:20,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2023-12-21 11:06:20,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 34 states have internal predecessors, (35), 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 11:06:20,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2023-12-21 11:06:20,121 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 42 [2023-12-21 11:06:20,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:20,121 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2023-12-21 11:06:20,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 6 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:06:20,121 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2023-12-21 11:06:20,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-12-21 11:06:20,122 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:20,122 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] [2023-12-21 11:06:20,129 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 11:06:20,329 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 11:06:20,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:20,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:20,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1965061851, now seen corresponding path program 3 times [2023-12-21 11:06:20,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:20,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558902780] [2023-12-21 11:06:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:20,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:20,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:20,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [975259724] [2023-12-21 11:06:20,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:06:20,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:20,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:20,349 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 11:06:20,362 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 11:06:20,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 11:06:20,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:06:20,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 175 conjunts are in the unsatisfiable core [2023-12-21 11:06:20,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:20,871 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 11:06:20,876 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 11:06:20,878 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 11:06:21,363 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 11:06:21,634 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 11:06:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2023-12-21 11:06:21,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:23,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558902780] [2023-12-21 11:06:23,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:23,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975259724] [2023-12-21 11:06:23,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975259724] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:23,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:23,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-21 11:06:23,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94679891] [2023-12-21 11:06:23,905 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:23,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 11:06:23,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:23,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 11:06:23,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2023-12-21 11:06:23,907 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 11:06:24,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:24,677 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2023-12-21 11:06:24,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-12-21 11:06:24,677 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 54 [2023-12-21 11:06:24,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:24,678 INFO L225 Difference]: With dead ends: 63 [2023-12-21 11:06:24,678 INFO L226 Difference]: Without dead ends: 61 [2023-12-21 11:06:24,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 11:06:24,679 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:24,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 95 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-12-21 11:06:24,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-21 11:06:24,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 53. [2023-12-21 11:06:24,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 35 states have internal predecessors, (36), 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 11:06:24,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2023-12-21 11:06:24,691 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 54 [2023-12-21 11:06:24,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:24,691 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2023-12-21 11:06:24,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 16 states have (on average 1.5625) internal successors, (25), 18 states have internal predecessors, (25), 7 states have call successors, (7), 3 states have call predecessors, (7), 6 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2023-12-21 11:06:24,691 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2023-12-21 11:06:24,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2023-12-21 11:06:24,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:24,693 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] [2023-12-21 11:06:24,699 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 11:06:24,896 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 11:06:24,896 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:24,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:24,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1567882761, now seen corresponding path program 4 times [2023-12-21 11:06:24,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:24,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842807304] [2023-12-21 11:06:24,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:24,917 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:24,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [960702149] [2023-12-21 11:06:24,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:06:24,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:24,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:24,930 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 11:06:24,950 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 11:06:25,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:06:25,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:06:25,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 205 conjunts are in the unsatisfiable core [2023-12-21 11:06:25,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:25,334 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 11:06:25,337 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 11:06:25,341 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 11:06:25,854 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 11:06:26,194 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 11:06:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 15 proven. 52 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2023-12-21 11:06:26,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:28,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:06:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842807304] [2023-12-21 11:06:28,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:06:28,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960702149] [2023-12-21 11:06:28,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960702149] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:06:28,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:06:28,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:06:28,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125870671] [2023-12-21 11:06:28,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:06:28,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:06:28,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:06:28,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:06:28,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2023-12-21 11:06:28,519 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 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 11:06:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:06:29,425 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2023-12-21 11:06:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:06:29,426 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 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 66 [2023-12-21 11:06:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:06:29,427 INFO L225 Difference]: With dead ends: 65 [2023-12-21 11:06:29,427 INFO L226 Difference]: Without dead ends: 63 [2023-12-21 11:06:29,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=112, Invalid=944, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 11:06:29,428 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 11:06:29,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 115 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 11:06:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-12-21 11:06:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 55. [2023-12-21 11:06:29,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 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), 10 states have return successors, (20), 11 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 11:06:29,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-12-21 11:06:29,439 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 66 [2023-12-21 11:06:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:06:29,440 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-12-21 11:06:29,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 states have internal predecessors, (27), 7 states have call successors, (7), 3 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 11:06:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-12-21 11:06:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-12-21 11:06:29,441 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:06:29,441 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] [2023-12-21 11:06:29,456 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 11:06:29,649 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 11:06:29,649 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:06:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:06:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash -870309937, now seen corresponding path program 1 times [2023-12-21 11:06:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:06:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073080241] [2023-12-21 11:06:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:06:29,669 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:06:29,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [87063924] [2023-12-21 11:06:29,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:06:29,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:06:29,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:06:29,671 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 11:06:29,676 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 11:06:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:06:29,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 119 conjunts are in the unsatisfiable core [2023-12-21 11:06:29,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:06:29,829 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 11:06:30,169 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 11:06:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 20 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 11:06:30,342 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:06:31,073 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:06:31,074 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 256 treesize of output 259 [2023-12-21 11:06:39,131 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse0 (select .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset))) (let ((.cse1 (* .cse0 .cse0 .cse0 .cse0))) (or (not (= (mod (+ (* .cse0 .cse0) .cse1 (* 2 .cse0 .cse0 .cse0)) 4) 0)) (and (= (+ (* 4 (div (+ .cse1 (* 6 .cse0 .cse0 .cse0) (* .cse0 .cse0 13)) 4)) (* .cse0 12) 4) (let ((.cse2 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse0 1))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse2 .cse2) (* 2 (* .cse2 .cse2 .cse2)) (* .cse2 .cse2 .cse2 .cse2)))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)))))) is different from false [2023-12-21 11:06:55,249 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:06:59,300 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse5 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse2 (select .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse1 (* .cse2 .cse2 .cse2 .cse2))) (and (or (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_8| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_8| Int)) (= (* 4 (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_8|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_8|)) (let ((.cse0 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* 2 (* .cse0 .cse0 .cse0)) (* .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0))))) (= (mod (+ .cse1 (* 2 .cse2 .cse2 .cse2) (* .cse2 .cse2)) 4) 0)) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30| Int)) (or (= (let ((.cse3 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* 2 (* .cse3 .cse3 .cse3)) (* .cse3 .cse3 .cse3 .cse3) (* .cse3 .cse3))) (* 4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))) (not (= (let ((.cse4 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse5 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse2 1))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* .cse4 .cse4) (* .cse4 .cse4 .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)))) (+ (* (div (+ .cse1 (* .cse2 .cse2 13) (* 6 .cse2 .cse2 .cse2)) 4) 4) 4 (* .cse2 12)))))))))) is different from true [2023-12-21 11:07:11,323 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:07:17,616 WARN L293 SmtUtils]: Spent 6.14s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-21 11:07:17,616 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:07:17,616 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 479 treesize of output 500 [2023-12-21 11:07:29,639 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:07:41,770 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (let ((.cse10 (select (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base) c_func_to_recursive_line_26_to_34_0_~y.offset))) (+ (* .cse10 .cse10) (* .cse10 .cse10 .cse10 .cse10) (* 2 .cse10 .cse10 .cse10))))) (or (let ((.cse9 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse2 (select .cse9 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse1 (* .cse2 .cse2 .cse2 .cse2))) (let ((.cse6 (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse9 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse2 1)))) (.cse7 (+ (* (div (+ .cse1 (* .cse2 .cse2 13) (* 6 .cse2 .cse2 .cse2)) 4) 4) 4 (* .cse2 12)))) (let ((.cse0 (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30| Int)) (not (= (let ((.cse8 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* .cse8 .cse8) (* .cse8 .cse8 .cse8 .cse8) (* 2 (* .cse8 .cse8 .cse8)))) .cse7))))) (and (or .cse0 (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base)) (= (mod (+ .cse1 (* 2 .cse2 .cse2 .cse2) (* .cse2 .cse2)) 4) 0) (or .cse0 (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30| Int)) (or (= (* 4 (div .cse3 4)) (let ((.cse4 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* 2 (* .cse4 .cse4 .cse4)) (* .cse4 .cse4 .cse4 .cse4) (* .cse4 .cse4)))) (not (= (let ((.cse5 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_30|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_30|))) (+ (* .cse5 .cse5) (* .cse5 .cse5 .cse5 .cse5) (* 2 (* .cse5 .cse5 .cse5)))) .cse7)))))))))) (not (= (mod .cse3 4) 0)))) is different from false [2023-12-21 11:07:41,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073080241] [2023-12-21 11:07:41,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:41,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87063924] [2023-12-21 11:07:41,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87063924] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:41,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:41,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-12-21 11:07:41,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535708351] [2023-12-21 11:07:41,775 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:41,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-12-21 11:07:41,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:41,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-12-21 11:07:41,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=373, Unknown=3, NotChecked=120, Total=552 [2023-12-21 11:07:41,777 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 17 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:43,982 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:07:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:45,488 INFO L93 Difference]: Finished difference Result 69 states and 79 transitions. [2023-12-21 11:07:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:07:45,488 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 48 [2023-12-21 11:07:45,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:45,489 INFO L225 Difference]: With dead ends: 69 [2023-12-21 11:07:45,489 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 11:07:45,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=162, Invalid=1037, Unknown=3, NotChecked=204, Total=1406 [2023-12-21 11:07:45,491 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:45,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 96 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-12-21 11:07:45,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 11:07:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-21 11:07:45,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 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), 10 states have return successors, (18), 11 states have call predecessors, (18), 8 states have call successors, (18) [2023-12-21 11:07:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2023-12-21 11:07:45,504 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 48 [2023-12-21 11:07:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:45,505 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2023-12-21 11:07:45,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 15 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2023-12-21 11:07:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2023-12-21 11:07:45,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2023-12-21 11:07:45,506 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:45,506 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:07:45,516 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 11:07:45,713 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 11:07:45,713 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:45,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1879374701, now seen corresponding path program 5 times [2023-12-21 11:07:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751033663] [2023-12-21 11:07:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:45,731 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:45,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613759661] [2023-12-21 11:07:45,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 11:07:45,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:45,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:45,732 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 11:07:45,751 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 11:07:47,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-12-21 11:07:47,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:47,114 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 229 conjunts are in the unsatisfiable core [2023-12-21 11:07:47,125 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:47,140 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 11:07:47,144 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 11:07:47,146 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 11:07:47,747 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 11:07:48,128 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2023-12-21 11:07:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 27 proven. 58 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-12-21 11:07:48,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:52,110 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 11:07:52,117 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 11:07:53,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:07:53,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751033663] [2023-12-21 11:07:53,786 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:07:53,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613759661] [2023-12-21 11:07:53,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613759661] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:07:53,786 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:07:53,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:07:53,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121112757] [2023-12-21 11:07:53,787 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:07:53,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:07:53,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:07:53,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:07:53,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=795, Unknown=0, NotChecked=0, Total=870 [2023-12-21 11:07:53,788 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 11:07:54,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:07:54,696 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2023-12-21 11:07:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-12-21 11:07:54,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) Word has length 78 [2023-12-21 11:07:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:07:54,698 INFO L225 Difference]: With dead ends: 67 [2023-12-21 11:07:54,698 INFO L226 Difference]: Without dead ends: 65 [2023-12-21 11:07:54,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=137, Invalid=1345, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 11:07:54,699 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 23 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:07:54,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 124 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:07:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-12-21 11:07:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 57. [2023-12-21 11:07:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 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), 11 states have return successors, (21), 12 states have call predecessors, (21), 8 states have call successors, (21) [2023-12-21 11:07:54,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 68 transitions. [2023-12-21 11:07:54,712 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 68 transitions. Word has length 78 [2023-12-21 11:07:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:07:54,712 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 68 transitions. [2023-12-21 11:07:54,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 1.5) internal successors, (27), 19 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 8 states have return successors, (9), 8 states have call predecessors, (9), 5 states have call successors, (9) [2023-12-21 11:07:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 68 transitions. [2023-12-21 11:07:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-12-21 11:07:54,713 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:07:54,713 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] [2023-12-21 11:07:54,723 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 11:07:54,920 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 11:07:54,920 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:07:54,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:07:54,921 INFO L85 PathProgramCache]: Analyzing trace with hash -743936405, now seen corresponding path program 2 times [2023-12-21 11:07:54,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:07:54,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234507887] [2023-12-21 11:07:54,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:07:54,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:07:54,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:07:54,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1269975778] [2023-12-21 11:07:54,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:07:54,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:07:54,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:07:54,938 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 11:07:54,941 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 11:07:55,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:07:55,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:07:55,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 146 conjunts are in the unsatisfiable core [2023-12-21 11:07:55,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:07:55,166 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 11:07:55,565 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 11:07:55,740 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 28 proven. 31 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-12-21 11:07:55,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:07:56,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:07:56,846 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 256 treesize of output 259 [2023-12-21 11:08:04,884 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse0 (select .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (not (= (mod (+ (* 3 .cse0 .cse0) (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0)) 4) 0)) (and (= (+ 36 (* .cse0 60)) (let ((.cse1 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset (+ 2 .cse0))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* 2 (* .cse1 .cse1 .cse1)) (* .cse1 .cse1 .cse1 .cse1) (* .cse1 .cse1) (* (div (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 37) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 10))) 4) 4)))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))) is different from false [2023-12-21 11:08:16,933 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:08:20,938 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49| Int)) (= (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_16|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_16|) 4) (let ((.cse1 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse1 .cse1 .cse1 .cse1) (* .cse1 .cse1) (* (* .cse1 .cse1 .cse1) 2)))))) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49| Int)) (or (= (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse2 .cse2 .cse2 .cse2) (* .cse2 .cse2) (* (* .cse2 .cse2 .cse2) 2))) (* 4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))) (not (= (let ((.cse3 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 2 .cse0))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse3 .cse3) (* 2 (* .cse3 .cse3 .cse3)) (* 4 (div (+ (* .cse0 .cse0 .cse0 (- 10)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 37) .cse0 .cse0)) 4)) (* .cse3 .cse3 .cse3 .cse3))) (+ (* 60 .cse0) 36)))))))) is different from false [2023-12-21 11:08:24,940 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse4 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (or (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0)) 4) 0) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_16| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49| Int)) (= (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_16|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_16|) 4) (let ((.cse1 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse1 .cse1 .cse1 .cse1) (* .cse1 .cse1) (* (* .cse1 .cse1 .cse1) 2)))))) (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49| Int)) (or (= (let ((.cse2 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse2 .cse2 .cse2 .cse2) (* .cse2 .cse2) (* (* .cse2 .cse2 .cse2) 2))) (* 4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))) (not (= (let ((.cse3 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse4 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 2 .cse0))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_49|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_49|))) (+ (* .cse3 .cse3) (* 2 (* .cse3 .cse3 .cse3)) (* 4 (div (+ (* .cse0 .cse0 .cse0 (- 10)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 37) .cse0 .cse0)) 4)) (* .cse3 .cse3 .cse3 .cse3))) (+ (* 60 .cse0) 36)))))))) is different from true [2023-12-21 11:08:36,957 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:09:28,000 WARN L293 SmtUtils]: Spent 50.64s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-21 11:09:28,001 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:09:28,001 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 744 treesize of output 765 [2023-12-21 11:09:36,019 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:10:00,207 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse3 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse1 (select .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (let ((.cse10 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse10 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse5 (* 4 (div (+ (* .cse0 .cse0 .cse0 (- 10)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 37) .cse0 .cse0)) 4))) (.cse6 (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse10 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ 2 .cse0)))) (.cse7 (+ (* 60 .cse0) 36))) (let ((.cse8 (forall ((v_prenex_20 Int) (v_prenex_19 Int)) (not (= (let ((.cse9 (select (select .cse6 v_prenex_20) v_prenex_19))) (+ (* .cse9 .cse9 .cse9 .cse9) (* 2 (* .cse9 .cse9 .cse9)) .cse5 (* .cse9 .cse9))) .cse7))))) (and (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0)) 4) 0) (forall ((v_prenex_20 Int) (v_prenex_19 Int)) (or (= (+ (* .cse1 12) 4) (let ((.cse2 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse3 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse1 1))) v_prenex_20) v_prenex_19))) (+ (* (* .cse2 .cse2 .cse2) 2) (* .cse2 .cse2) (* (div (+ (* (- 1) .cse1 .cse1 .cse1 .cse1) (* (- 13) .cse1 .cse1) (* (- 6) .cse1 .cse1 .cse1)) 4) 4) (* .cse2 .cse2 .cse2 .cse2)))) (not (= (let ((.cse4 (select (select .cse6 v_prenex_20) v_prenex_19))) (+ (* .cse4 .cse4 .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)) .cse5 (* .cse4 .cse4))) .cse7)))) (or .cse8 (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base)) (or .cse8 (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))))) (not (= (mod (+ (* 3 .cse1 .cse1) (* 3 .cse1 .cse1 .cse1 .cse1) (* 2 .cse1 .cse1 .cse1)) 4) 0))))) is different from false [2023-12-21 11:10:00,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234507887] [2023-12-21 11:10:00,215 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:00,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269975778] [2023-12-21 11:10:00,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269975778] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:00,216 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:00,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-12-21 11:10:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029615686] [2023-12-21 11:10:00,216 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:00,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 11:10:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 11:10:00,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=411, Unknown=4, NotChecked=126, Total=600 [2023-12-21 11:10:00,217 INFO L87 Difference]: Start difference. First operand 57 states and 68 transitions. Second operand has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 16 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 11:10:02,426 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:10:06,523 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:10:12,762 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:10:13,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:13,114 INFO L93 Difference]: Finished difference Result 71 states and 81 transitions. [2023-12-21 11:10:13,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 11:10:13,115 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 16 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 60 [2023-12-21 11:10:13,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:13,116 INFO L225 Difference]: With dead ends: 71 [2023-12-21 11:10:13,116 INFO L226 Difference]: Without dead ends: 57 [2023-12-21 11:10:13,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=146, Invalid=984, Unknown=4, NotChecked=198, Total=1332 [2023-12-21 11:10:13,118 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 8 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:13,118 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 92 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 333 Invalid, 3 Unknown, 0 Unchecked, 12.6s Time] [2023-12-21 11:10:13,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-21 11:10:13,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-21 11:10:13,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 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), 11 states have return successors, (19), 12 states have call predecessors, (19), 8 states have call successors, (19) [2023-12-21 11:10:13,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-12-21 11:10:13,128 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 60 [2023-12-21 11:10:13,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:13,129 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-12-21 11:10:13,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 16 states have internal predecessors, (26), 6 states have call successors, (6), 4 states have call predecessors, (6), 7 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-12-21 11:10:13,129 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-12-21 11:10:13,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-12-21 11:10:13,131 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:13,131 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:10:13,138 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 11:10:13,338 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 11:10:13,338 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:13,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:13,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1381245265, now seen corresponding path program 6 times [2023-12-21 11:10:13,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:13,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768205483] [2023-12-21 11:10:13,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:13,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:13,355 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:13,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071039081] [2023-12-21 11:10:13,355 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 11:10:13,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:13,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:13,356 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 11:10:13,368 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 11:10:14,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-21 11:10:14,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:10:14,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 267 conjunts are in the unsatisfiable core [2023-12-21 11:10:14,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:14,202 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 11:10:14,206 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 11:10:14,209 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 11:10:14,855 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 11:10:15,288 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 11:10:15,387 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 26 proven. 76 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2023-12-21 11:10:15,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:19,771 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 11:10:19,776 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 11:10:22,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:10:22,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768205483] [2023-12-21 11:10:22,387 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:10:22,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071039081] [2023-12-21 11:10:22,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071039081] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:10:22,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:10:22,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-12-21 11:10:22,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669022718] [2023-12-21 11:10:22,387 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:10:22,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-12-21 11:10:22,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:10:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-12-21 11:10:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=850, Unknown=0, NotChecked=0, Total=930 [2023-12-21 11:10:22,389 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 11:10:23,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:10:23,297 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2023-12-21 11:10:23,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 11:10:23,297 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) Word has length 90 [2023-12-21 11:10:23,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:10:23,298 INFO L225 Difference]: With dead ends: 69 [2023-12-21 11:10:23,298 INFO L226 Difference]: Without dead ends: 67 [2023-12-21 11:10:23,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2023-12-21 11:10:23,299 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 20 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:10:23,300 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 150 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:10:23,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-12-21 11:10:23,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2023-12-21 11:10:23,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 12 states have return successors, (22), 13 states have call predecessors, (22), 8 states have call successors, (22) [2023-12-21 11:10:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 70 transitions. [2023-12-21 11:10:23,310 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 70 transitions. Word has length 90 [2023-12-21 11:10:23,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:10:23,311 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 70 transitions. [2023-12-21 11:10:23,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 9 states have return successors, (10), 9 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 11:10:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 70 transitions. [2023-12-21 11:10:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 11:10:23,312 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:10:23,312 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] [2023-12-21 11:10:23,321 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 11:10:23,520 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 11:10:23,521 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:10:23,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:10:23,521 INFO L85 PathProgramCache]: Analyzing trace with hash -802278265, now seen corresponding path program 3 times [2023-12-21 11:10:23,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:10:23,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093459714] [2023-12-21 11:10:23,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:10:23,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:10:23,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:10:23,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [904357968] [2023-12-21 11:10:23,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:10:23,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:10:23,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:10:23,543 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 11:10:23,559 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 11:10:24,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 11:10:24,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:10:24,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 200 conjunts are in the unsatisfiable core [2023-12-21 11:10:24,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:10:24,047 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 11:10:24,050 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 11:10:29,034 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 11:10:29,041 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 11:10:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2023-12-21 11:10:29,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:10:59,132 WARN L293 SmtUtils]: Spent 13.96s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:11:14,163 WARN L293 SmtUtils]: Spent 7.89s on a formula simplification that was a NOOP. DAG size: 93 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:11:21,433 WARN L293 SmtUtils]: Spent 7.27s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:11:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:11:23,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093459714] [2023-12-21 11:11:23,447 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:11:23,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904357968] [2023-12-21 11:11:23,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904357968] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:11:23,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:11:23,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-21 11:11:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767694674] [2023-12-21 11:11:23,447 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:11:23,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-21 11:11:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:11:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-21 11:11:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2023-12-21 11:11:23,448 INFO L87 Difference]: Start difference. First operand 59 states and 70 transitions. Second operand has 20 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-21 11:11:29,461 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 11:11:31,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:11:31,451 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2023-12-21 11:11:31,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:11:31,452 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) Word has length 72 [2023-12-21 11:11:31,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:11:31,452 INFO L225 Difference]: With dead ends: 73 [2023-12-21 11:11:31,452 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 11:11:31,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=170, Invalid=1236, Unknown=0, NotChecked=0, Total=1406 [2023-12-21 11:11:31,453 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-21 11:11:31,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 113 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 412 Invalid, 1 Unknown, 0 Unchecked, 7.3s Time] [2023-12-21 11:11:31,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 11:11:31,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-21 11:11:31,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 37 states have (on average 1.054054054054054) internal successors, (39), 38 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 12 states have return successors, (20), 13 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 11:11:31,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2023-12-21 11:11:31,463 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 72 [2023-12-21 11:11:31,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:11:31,464 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2023-12-21 11:11:31,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 18 states have internal predecessors, (28), 7 states have call successors, (7), 4 states have call predecessors, (7), 8 states have return successors, (9), 7 states have call predecessors, (9), 6 states have call successors, (9) [2023-12-21 11:11:31,464 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2023-12-21 11:11:31,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-12-21 11:11:31,465 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:11:31,465 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:11:31,473 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 11:11:31,665 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 11:11:31,666 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:11:31,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:11:31,666 INFO L85 PathProgramCache]: Analyzing trace with hash 711258187, now seen corresponding path program 7 times [2023-12-21 11:11:31,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:11:31,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227757693] [2023-12-21 11:11:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:11:31,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:11:31,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:11:31,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1408852752] [2023-12-21 11:11:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 11:11:31,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:11:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:11:31,687 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 11:11:31,700 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 11:11:32,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:11:32,244 WARN L260 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 401 conjunts are in the unsatisfiable core [2023-12-21 11:11:32,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:11:32,262 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 11:11:32,266 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 11:11:32,269 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 11:11:32,275 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 11:11:33,561 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 11:11:34,773 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 11:11:34,933 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2023-12-21 11:11:34,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:11:53,150 WARN L293 SmtUtils]: Spent 5.01s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 302] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:12:10,153 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 11:12:10,158 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 11:12:17,460 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 164 (called from [L 279] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2023-12-21 11:12:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:12:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227757693] [2023-12-21 11:12:27,331 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:12:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408852752] [2023-12-21 11:12:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408852752] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:12:27,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:12:27,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 11:12:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497581114] [2023-12-21 11:12:27,332 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:12:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 11:12:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:12:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 11:12:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2023-12-21 11:12:27,333 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 11:12:31,421 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2023-12-21 11:12:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:12:33,830 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2023-12-21 11:12:33,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-12-21 11:12:33,830 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) Word has length 102 [2023-12-21 11:12:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:12:33,831 INFO L225 Difference]: With dead ends: 71 [2023-12-21 11:12:33,831 INFO L226 Difference]: Without dead ends: 69 [2023-12-21 11:12:33,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=141, Invalid=1499, Unknown=0, NotChecked=0, Total=1640 [2023-12-21 11:12:33,833 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:12:33,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 208 Invalid, 754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2023-12-21 11:12:33,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-12-21 11:12:33,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2023-12-21 11:12:33,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 9 states have call successors, (9), 7 states have call predecessors, (9), 13 states have return successors, (23), 14 states have call predecessors, (23), 8 states have call successors, (23) [2023-12-21 11:12:33,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2023-12-21 11:12:33,844 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 102 [2023-12-21 11:12:33,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:12:33,845 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2023-12-21 11:12:33,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 3 states have call predecessors, (6), 10 states have return successors, (10), 10 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-21 11:12:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2023-12-21 11:12:33,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-12-21 11:12:33,846 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:12:33,846 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] [2023-12-21 11:12:33,860 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-21 11:12:34,058 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 11:12:34,058 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:12:34,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:12:34,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1222651357, now seen corresponding path program 4 times [2023-12-21 11:12:34,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:12:34,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102595808] [2023-12-21 11:12:34,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:12:34,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:12:34,084 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:12:34,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [239606480] [2023-12-21 11:12:34,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:12:34,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:12:34,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:12:34,086 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 11:12:34,093 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 11:12:34,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:12:34,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:12:34,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 189 conjunts are in the unsatisfiable core [2023-12-21 11:12:34,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:12:34,640 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 17 treesize of output 9 [2023-12-21 11:12:34,821 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 33 treesize of output 24 [2023-12-21 11:12:35,094 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 17 treesize of output 9 [2023-12-21 11:12:35,566 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 123 treesize of output 51 [2023-12-21 11:12:35,574 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 31 treesize of output 23 [2023-12-21 11:12:35,664 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 81 proven. 51 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-12-21 11:12:35,664 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:12:46,462 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:12:46,463 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 498 treesize of output 497 [2023-12-21 11:12:54,586 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse0 (select .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (not (= (mod (+ (* 3 .cse0 .cse0) (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0)) 4) 0)) (and (= (+ (* 360 .cse0) 400 (* 4 (* .cse0 .cse0 .cse0)) (* (* .cse0 .cse0) 48)) (let ((.cse1 (select (select (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse2 c_func_to_recursive_line_26_to_34_0_~y.offset (+ .cse0 4))) |c_func_to_recursive_line_26_to_34_0_#in~y.base|) |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (+ (* .cse1 .cse1 .cse1 .cse1) (* (div (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* .cse0 .cse0 (- 73)) (* (- 14) .cse0 .cse0 .cse0)) 4) 4) (* 2 (* .cse1 .cse1 .cse1)) (* .cse1 .cse1)))) (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base) (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))) is different from false [2023-12-21 11:13:02,647 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:13:10,662 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse0 (select .cse2 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int)) (or (not (= (+ (* 360 .cse0) (* (* .cse0 .cse0 .cse0) 4) 400 (* 48 (* .cse0 .cse0))) (let ((.cse1 (select (select (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse2 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse0 4))) |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse1 .cse1) (* 2 (* .cse1 .cse1 .cse1)) (* (div (+ (* .cse0 .cse0 (- 73)) (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 14) .cse0 .cse0 .cse0)) 4) 4) (* .cse1 .cse1 .cse1 .cse1))))) (= (let ((.cse3 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse3 .cse3) (* (* .cse3 .cse3 .cse3) 2) (* .cse3 .cse3 .cse3 .cse3))) (* 4 (select (select |c_#memory_int#1| |c_func_to_recursive_line_26_to_34_0_#in~x.base|) |c_func_to_recursive_line_26_to_34_0_#in~x.offset|))))) (or (forall ((|v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_51| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_51| Int)) (= (* (select (select |c_#memory_int#1| |v_func_to_recursive_line_26_to_34_0_#in~x.base_BEFORE_CALL_51|) |v_func_to_recursive_line_26_to_34_0_#in~x.offset_BEFORE_CALL_51|) 4) (let ((.cse4 (select (select |c_#memory_int#2| |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse4 .cse4) (* (* .cse4 .cse4 .cse4) 2) (* .cse4 .cse4 .cse4 .cse4))))) (= (mod (+ (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0) (* 3 .cse0 .cse0)) 4) 0))))) is different from true [2023-12-21 11:13:18,678 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 19 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:13:46,081 WARN L293 SmtUtils]: Spent 18.31s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2023-12-21 11:13:46,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-12-21 11:13:46,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 1259 treesize of output 1272 [2023-12-21 11:13:58,113 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:06,134 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:14,141 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 4 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:22,156 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:30,162 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:38,173 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:46,182 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:14:54,191 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 23 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:15:02,199 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 3 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:15:10,587 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 11:15:37,053 WARN L854 $PredicateComparison]: unable to prove that (let ((.cse23 (select |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base))) (let ((.cse0 (select .cse23 c_func_to_recursive_line_26_to_34_0_~y.offset))) (or (not (= (mod (+ (* 3 .cse0 .cse0) (* 3 .cse0 .cse0 .cse0 .cse0) (* 2 .cse0 .cse0 .cse0)) 4) 0)) (let ((.cse22 (select |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base|))) (let ((.cse15 (select .cse22 |c_func_to_recursive_line_26_to_34_0_#in~y.offset|))) (let ((.cse9 (* (div (+ (* (- 1) .cse0 .cse0 .cse0 .cse0) (* (- 37) .cse0 .cse0) (* .cse0 .cse0 .cse0 (- 10))) 4) 4)) (.cse10 (store |c_#memory_int#2| c_func_to_recursive_line_26_to_34_0_~y.base (store .cse23 c_func_to_recursive_line_26_to_34_0_~y.offset (+ 3 .cse0)))) (.cse2 (+ 144 (* 4 (* .cse0 .cse0 .cse0)) (* (* .cse0 .cse0) 36) (* .cse0 168))) (.cse3 (+ (* 360 .cse15) (* (* .cse15 .cse15 .cse15) 4) 400 (* 48 (* .cse15 .cse15)))) (.cse5 (* (div (+ (* .cse15 .cse15 (- 73)) (* (- 1) .cse15 .cse15 .cse15 .cse15) (* (- 14) .cse15 .cse15 .cse15)) 4) 4)) (.cse6 (store |c_old(#memory_int#2)| |c_func_to_recursive_line_26_to_34_0_#in~y.base| (store .cse22 |c_func_to_recursive_line_26_to_34_0_#in~y.offset| (+ .cse15 4))))) (let ((.cse12 (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int)) (or (= (let ((.cse20 (select (select .cse10 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse20 .cse20) (* (* .cse20 .cse20 .cse20) 2) .cse9 (* .cse20 .cse20 .cse20 .cse20))) .cse2) (not (= .cse3 (let ((.cse21 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse21 .cse21) (* 2 (* .cse21 .cse21 .cse21)) .cse5 (* .cse21 .cse21 .cse21 .cse21)))))))) (.cse7 (+ 36 (* .cse0 60)))) (let ((.cse14 (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int)) (or (not (= .cse3 (let ((.cse18 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse18 .cse18) (* 2 (* .cse18 .cse18 .cse18)) .cse5 (* .cse18 .cse18 .cse18 .cse18))))) (= (let ((.cse19 (select (select .cse10 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse19 .cse19) (* (* .cse19 .cse19 .cse19) 2) .cse9 (* .cse19 .cse19 .cse19 .cse19))) .cse7)))) (.cse13 (= c_func_to_recursive_line_26_to_34_0_~x.offset |c_func_to_recursive_line_26_to_34_0_#in~x.offset|)) (.cse16 (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int)) (not (= .cse3 (let ((.cse17 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse17 .cse17) (* 2 (* .cse17 .cse17 .cse17)) .cse5 (* .cse17 .cse17 .cse17 .cse17)))))) .cse12)) (.cse11 (= |c_func_to_recursive_line_26_to_34_0_#in~x.base| c_func_to_recursive_line_26_to_34_0_~x.base))) (and (forall ((|v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98| Int) (|v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98| Int)) (let ((.cse1 (let ((.cse8 (select (select .cse10 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse8 .cse8) (* (* .cse8 .cse8 .cse8) 2) .cse9 (* .cse8 .cse8 .cse8 .cse8))))) (or (= .cse1 .cse2) (not (= .cse3 (let ((.cse4 (select (select .cse6 |v_func_to_recursive_line_26_to_34_0_#in~y.base_BEFORE_CALL_98|) |v_func_to_recursive_line_26_to_34_0_#in~y.offset_BEFORE_CALL_98|))) (+ (* .cse4 .cse4) (* 2 (* .cse4 .cse4 .cse4)) .cse5 (* .cse4 .cse4 .cse4 .cse4))))) (= .cse1 .cse7)))) (or (not .cse11) .cse12 (not .cse13)) (or .cse14 .cse11) (= (mod (+ (* 3 .cse15 .cse15 .cse15 .cse15) (* 2 .cse15 .cse15 .cse15) (* 3 .cse15 .cse15)) 4) 0) (or .cse14 .cse13) (or .cse16 .cse13) (or .cse16 .cse11)))))))))) is different from false [2023-12-21 11:15:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:15:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102595808] [2023-12-21 11:15:37,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:15:37,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239606480] [2023-12-21 11:15:37,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239606480] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:15:37,081 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:15:37,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2023-12-21 11:15:37,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26639607] [2023-12-21 11:15:37,081 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:15:37,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 11:15:37,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:15:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 11:15:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=483, Unknown=3, NotChecked=138, Total=702 [2023-12-21 11:15:37,082 INFO L87 Difference]: Start difference. First operand 61 states and 72 transitions. Second operand has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 11:15:38,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:15:38,821 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2023-12-21 11:15:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 11:15:38,822 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) Word has length 84 [2023-12-21 11:15:38,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:15:38,822 INFO L225 Difference]: With dead ends: 67 [2023-12-21 11:15:38,822 INFO L226 Difference]: Without dead ends: 51 [2023-12-21 11:15:38,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=189, Invalid=1152, Unknown=3, NotChecked=216, Total=1560 [2023-12-21 11:15:38,824 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-21 11:15:38,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 104 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-21 11:15:38,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-12-21 11:15:38,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2023-12-21 11:15:38,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 7 states have call successors, (7), 6 states have call predecessors, (7), 11 states have return successors, (15), 12 states have call predecessors, (15), 6 states have call successors, (15) [2023-12-21 11:15:38,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2023-12-21 11:15:38,833 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 84 [2023-12-21 11:15:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:15:38,833 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2023-12-21 11:15:38,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 7 states have call successors, (9), 5 states have call predecessors, (9), 9 states have return successors, (10), 9 states have call predecessors, (10), 6 states have call successors, (10) [2023-12-21 11:15:38,833 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2023-12-21 11:15:38,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-21 11:15:38,834 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:15:38,834 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:15:38,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-21 11:15:39,043 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 11:15:39,043 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:15:39,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:15:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash -2123064985, now seen corresponding path program 8 times [2023-12-21 11:15:39,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:15:39,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521613698] [2023-12-21 11:15:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:15:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:15:39,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:15:39,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [206577296] [2023-12-21 11:15:39,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 11:15:39,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:15:39,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:15:39,068 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 11:15:39,069 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 11:15:39,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 11:15:39,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:15:39,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 319 conjunts are in the unsatisfiable core [2023-12-21 11:15:39,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:15:39,614 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 11:15:39,618 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 11:15:39,621 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 11:15:40,434 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 11:15:41,084 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 11:15:41,199 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 45 proven. 115 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2023-12-21 11:15:41,199 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:15:47,321 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 11:15:47,326 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 11:15:50,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:15:50,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521613698] [2023-12-21 11:15:50,499 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:15:50,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206577296] [2023-12-21 11:15:50,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206577296] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:15:50,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:15:50,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-12-21 11:15:50,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293947714] [2023-12-21 11:15:50,500 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:15:50,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-12-21 11:15:50,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:15:50,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-12-21 11:15:50,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 11:15:50,501 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-21 11:15:51,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:15:51,475 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2023-12-21 11:15:51,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 11:15:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) Word has length 114 [2023-12-21 11:15:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:15:51,476 INFO L225 Difference]: With dead ends: 59 [2023-12-21 11:15:51,476 INFO L226 Difference]: Without dead ends: 53 [2023-12-21 11:15:51,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=143, Invalid=1579, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 11:15:51,477 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 15 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-12-21 11:15:51,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 191 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-12-21 11:15:51,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-12-21 11:15:51,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-12-21 11:15:51,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 7 states have call successors, (7), 6 states have call predecessors, (7), 12 states have return successors, (16), 13 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 11:15:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2023-12-21 11:15:51,486 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 114 [2023-12-21 11:15:51,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:15:51,487 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2023-12-21 11:15:51,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 6 states have call successors, (6), 3 states have call predecessors, (6), 11 states have return successors, (12), 11 states have call predecessors, (12), 5 states have call successors, (12) [2023-12-21 11:15:51,487 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2023-12-21 11:15:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-12-21 11:15:51,488 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:15:51,488 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:15:51,498 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 11:15:51,698 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 11:15:51,698 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:15:51,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:15:51,699 INFO L85 PathProgramCache]: Analyzing trace with hash -2001651197, now seen corresponding path program 9 times [2023-12-21 11:15:51,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:15:51,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947057506] [2023-12-21 11:15:51,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:15:51,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:15:51,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:15:51,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12441008] [2023-12-21 11:15:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 11:15:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:15:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:15:51,722 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 11:15:51,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 11:16:04,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-12-21 11:16:04,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:16:04,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 944 conjuncts, 355 conjunts are in the unsatisfiable core [2023-12-21 11:16:04,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:16:04,925 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 11:16:04,930 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 11:16:04,932 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 11:16:05,816 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 11:16:06,514 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 11:16:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 42 proven. 147 refuted. 0 times theorem prover too weak. 362 trivial. 0 not checked. [2023-12-21 11:16:06,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:16:13,381 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 11:16:13,386 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 11:16:16,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:16:16,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947057506] [2023-12-21 11:16:16,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:16:16,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12441008] [2023-12-21 11:16:16,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12441008] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:16:16,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:16:16,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 11:16:16,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437298744] [2023-12-21 11:16:16,736 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:16:16,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 11:16:16,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:16:16,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 11:16:16,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 11:16:16,737 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 26 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 11:16:17,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:16:17,816 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2023-12-21 11:16:17,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 11:16:17,817 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), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) Word has length 126 [2023-12-21 11:16:17,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:16:17,817 INFO L225 Difference]: With dead ends: 61 [2023-12-21 11:16:17,817 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 11:16:17,818 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=145, Invalid=1661, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 11:16:17,819 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-12-21 11:16:17,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 217 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-12-21 11:16:17,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 11:16:17,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-21 11:16:17,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 13 states have return successors, (17), 14 states have call predecessors, (17), 6 states have call successors, (17) [2023-12-21 11:16:17,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2023-12-21 11:16:17,828 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 126 [2023-12-21 11:16:17,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:16:17,828 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2023-12-21 11:16:17,828 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), 6 states have call successors, (6), 3 states have call predecessors, (6), 12 states have return successors, (13), 12 states have call predecessors, (13), 5 states have call successors, (13) [2023-12-21 11:16:17,828 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2023-12-21 11:16:17,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-21 11:16:17,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:16:17,829 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:16:17,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 11:16:18,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 11:16:18,032 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:16:18,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:16:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -25611745, now seen corresponding path program 10 times [2023-12-21 11:16:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:16:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176984635] [2023-12-21 11:16:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:16:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:16:18,057 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:16:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [425670802] [2023-12-21 11:16:18,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 11:16:18,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:16:18,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:16:18,058 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:16:18,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 11:16:47,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 11:16:47,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:16:47,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 1032 conjuncts, 404 conjunts are in the unsatisfiable core [2023-12-21 11:16:47,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:16:47,929 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 11:16:47,933 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 11:16:47,936 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 11:16:48,126 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 11:16:48,987 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 11:16:49,729 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 11:16:49,854 INFO L134 CoverageAnalysis]: Checked inductivity of 672 backedges. 37 proven. 187 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2023-12-21 11:16:49,854 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:16:56,971 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 11:16:56,978 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 11:17:00,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:17:00,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176984635] [2023-12-21 11:17:00,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:17:00,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425670802] [2023-12-21 11:17:00,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425670802] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:17:00,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:17:00,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2023-12-21 11:17:00,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711514110] [2023-12-21 11:17:00,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:17:00,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 11:17:00,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:17:00,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 11:17:00,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2023-12-21 11:17:00,585 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 11:17:01,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:17:01,761 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2023-12-21 11:17:01,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-12-21 11:17:01,762 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) Word has length 138 [2023-12-21 11:17:01,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:17:01,763 INFO L225 Difference]: With dead ends: 63 [2023-12-21 11:17:01,763 INFO L226 Difference]: Without dead ends: 57 [2023-12-21 11:17:01,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=143, Invalid=1663, Unknown=0, NotChecked=0, Total=1806 [2023-12-21 11:17:01,764 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 11:17:01,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 281 Invalid, 682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 11:17:01,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-12-21 11:17:01,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-12-21 11:17:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 7 states have call successors, (7), 6 states have call predecessors, (7), 14 states have return successors, (18), 15 states have call predecessors, (18), 6 states have call successors, (18) [2023-12-21 11:17:01,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2023-12-21 11:17:01,773 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 138 [2023-12-21 11:17:01,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:17:01,774 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2023-12-21 11:17:01,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 24 states have internal predecessors, (31), 6 states have call successors, (6), 3 states have call predecessors, (6), 13 states have return successors, (14), 13 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 11:17:01,774 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2023-12-21 11:17:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-21 11:17:01,774 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:17:01,775 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:17:01,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-21 11:17:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 11:17:01,984 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:17:01,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:17:01,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1749884485, now seen corresponding path program 11 times [2023-12-21 11:17:01,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:17:01,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362827385] [2023-12-21 11:17:01,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:17:01,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:17:02,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:17:02,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [223321092] [2023-12-21 11:17:02,017 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 11:17:02,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:17:02,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:17:02,018 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:17:02,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 11:18:11,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-12-21 11:18:11,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:18:11,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 429 conjunts are in the unsatisfiable core [2023-12-21 11:18:11,721 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:18:11,727 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 11:18:11,730 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 11:18:11,733 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 11:18:12,846 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 11:18:13,728 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 11:18:13,856 INFO L134 CoverageAnalysis]: Checked inductivity of 805 backedges. 55 proven. 187 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2023-12-21 11:18:13,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:18:22,113 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 11:18:22,118 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 11:18:26,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:18:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362827385] [2023-12-21 11:18:26,116 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:18:26,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223321092] [2023-12-21 11:18:26,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223321092] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:18:26,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:18:26,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2023-12-21 11:18:26,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542573799] [2023-12-21 11:18:26,116 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:18:26,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 11:18:26,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:18:26,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 11:18:26,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1170, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 11:18:26,118 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-21 11:18:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:18:27,337 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-12-21 11:18:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 11:18:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 5 states have call successors, (15) Word has length 150 [2023-12-21 11:18:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:18:27,338 INFO L225 Difference]: With dead ends: 65 [2023-12-21 11:18:27,339 INFO L226 Difference]: Without dead ends: 59 [2023-12-21 11:18:27,339 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=145, Invalid=1747, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 11:18:27,339 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 11:18:27,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 281 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 11:18:27,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-12-21 11:18:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-12-21 11:18:27,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 15 states have return successors, (19), 16 states have call predecessors, (19), 6 states have call successors, (19) [2023-12-21 11:18:27,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-12-21 11:18:27,348 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 150 [2023-12-21 11:18:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:18:27,349 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-12-21 11:18:27,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 6 states have call successors, (6), 3 states have call predecessors, (6), 14 states have return successors, (15), 14 states have call predecessors, (15), 5 states have call successors, (15) [2023-12-21 11:18:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-12-21 11:18:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2023-12-21 11:18:27,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:18:27,350 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:18:27,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-12-21 11:18:27,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:18:27,557 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:18:27,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:18:27,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1915967273, now seen corresponding path program 12 times [2023-12-21 11:18:27,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:18:27,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162725907] [2023-12-21 11:18:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:18:27,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:18:27,587 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:18:27,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2133146825] [2023-12-21 11:18:27,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 11:18:27,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:18:27,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:18:27,589 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:18:27,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 11:19:57,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-12-21 11:19:57,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 11:19:57,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 457 conjunts are in the unsatisfiable core [2023-12-21 11:19:57,756 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:19:57,762 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 11:19:57,765 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 11:19:57,768 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 11:19:59,003 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 11:20:00,010 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 11:20:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 950 backedges. 51 proven. 248 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2023-12-21 11:20:00,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 11:20:05,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 11:20:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162725907] [2023-12-21 11:20:05,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 11:20:05,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133146825] [2023-12-21 11:20:05,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133146825] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 11:20:05,855 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 11:20:05,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-12-21 11:20:05,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074068604] [2023-12-21 11:20:05,855 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 11:20:05,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-12-21 11:20:05,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 11:20:05,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-12-21 11:20:05,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 11:20:05,857 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 15 states have return successors, (16), 15 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 11:20:07,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 11:20:07,588 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2023-12-21 11:20:07,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-21 11:20:07,589 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 15 states have return successors, (16), 15 states have call predecessors, (16), 6 states have call successors, (16) Word has length 162 [2023-12-21 11:20:07,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 11:20:07,589 INFO L225 Difference]: With dead ends: 67 [2023-12-21 11:20:07,589 INFO L226 Difference]: Without dead ends: 61 [2023-12-21 11:20:07,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=134, Invalid=1588, Unknown=0, NotChecked=0, Total=1722 [2023-12-21 11:20:07,590 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 765 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 765 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-12-21 11:20:07,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 341 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 765 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-12-21 11:20:07,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-12-21 11:20:07,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-12-21 11:20:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 7 states have call successors, (7), 6 states have call predecessors, (7), 16 states have return successors, (20), 17 states have call predecessors, (20), 6 states have call successors, (20) [2023-12-21 11:20:07,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2023-12-21 11:20:07,600 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 162 [2023-12-21 11:20:07,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 11:20:07,600 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2023-12-21 11:20:07,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.4) internal successors, (35), 27 states have internal predecessors, (35), 7 states have call successors, (7), 3 states have call predecessors, (7), 15 states have return successors, (16), 15 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-21 11:20:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2023-12-21 11:20:07,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2023-12-21 11:20:07,601 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 11:20:07,601 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 11:20:07,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 11:20:07,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:20:07,802 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 11:20:07,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 11:20:07,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1396906125, now seen corresponding path program 13 times [2023-12-21 11:20:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 11:20:07,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838716159] [2023-12-21 11:20:07,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 11:20:07,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 11:20:07,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 11:20:07,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043962283] [2023-12-21 11:20:07,832 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 11:20:07,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:20:07,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 11:20:07,833 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 11:20:07,836 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 11:20:09,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 11:20:09,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 1290 conjuncts, 489 conjunts are in the unsatisfiable core [2023-12-21 11:20:09,482 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 11:20:09,489 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 11:20:09,492 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 11:20:09,517 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 11:20:10,817 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 Received shutdown request... [2023-12-21 11:20:11,573 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 11:20:11,576 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 11:20:11,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-21 11:20:11,605 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 11:20:11,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 11:20:11,777 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was analyzing trace of length 175 with TraceHistMax 15,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 18 known predicates. [2023-12-21 11:20:11,782 INFO L445 BasicCegarLoop]: Path program histogram: [13, 4, 1, 1, 1, 1] [2023-12-21 11:20:11,784 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 11:20:11,786 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 11:20:11 BoogieIcfgContainer [2023-12-21 11:20:11,786 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 11:20:11,786 INFO L158 Benchmark]: Toolchain (without parser) took 864459.25ms. Allocated memory was 270.5MB in the beginning and 325.1MB in the end (delta: 54.5MB). Free memory was 220.0MB in the beginning and 117.9MB in the end (delta: 102.1MB). Peak memory consumption was 157.7MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,786 INFO L158 Benchmark]: CDTParser took 1.21ms. Allocated memory is still 209.7MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 11:20:11,786 INFO L158 Benchmark]: CACSL2BoogieTranslator took 219.10ms. Allocated memory is still 270.5MB. Free memory was 220.0MB in the beginning and 208.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,787 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.50ms. Allocated memory is still 270.5MB. Free memory was 208.5MB in the beginning and 206.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,787 INFO L158 Benchmark]: Boogie Preprocessor took 31.55ms. Allocated memory is still 270.5MB. Free memory was 206.9MB in the beginning and 204.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,787 INFO L158 Benchmark]: RCFGBuilder took 356.97ms. Allocated memory is still 270.5MB. Free memory was 204.3MB in the beginning and 188.6MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,787 INFO L158 Benchmark]: TraceAbstraction took 863817.51ms. Allocated memory was 270.5MB in the beginning and 325.1MB in the end (delta: 54.5MB). Free memory was 188.0MB in the beginning and 117.9MB in the end (delta: 70.2MB). Peak memory consumption was 126.3MB. Max. memory is 8.0GB. [2023-12-21 11:20:11,788 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.21ms. Allocated memory is still 209.7MB. Free memory is still 154.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 219.10ms. Allocated memory is still 270.5MB. Free memory was 220.0MB in the beginning and 208.5MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 28.50ms. Allocated memory is still 270.5MB. Free memory was 208.5MB in the beginning and 206.9MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.55ms. Allocated memory is still 270.5MB. Free memory was 206.9MB in the beginning and 204.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 356.97ms. Allocated memory is still 270.5MB. Free memory was 204.3MB in the beginning and 188.6MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 863817.51ms. Allocated memory was 270.5MB in the beginning and 325.1MB in the end (delta: 54.5MB). Free memory was 188.0MB in the beginning and 117.9MB in the end (delta: 70.2MB). Peak memory consumption was 126.3MB. 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 175 with TraceHistMax 15,while TraceCheckSpWp was constructing forward predicates,while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 18 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 863.8s, OverallIterations: 21, TraceHistogramMax: 15, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 50.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 5 mSolverCounterUnknown, 512 SdHoareTripleChecker+Valid, 42.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 506 mSDsluCounter, 2829 SdHoareTripleChecker+Invalid, 40.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2556 mSDsCounter, 207 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8748 IncrementalHoareTripleChecker+Invalid, 8960 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 207 mSolverCounterUnsat, 273 mSDtfsCounter, 8748 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1917 GetRequests, 1229 SyntacticMatches, 10 SemanticMatches, 678 ConstructedPredicates, 9 IntricatePredicates, 0 DeprecatedPredicates, 3711 ImplicationChecksByTransitivity, 90.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=14, InterpolantAutomatonStates: 394, 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, 20 MinimizatonAttempts, 60 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.7s SsaConstructionTime, 205.0s SatisfiabilityAnalysisTime, 595.3s InterpolantComputationTime, 1484 NumberOfCodeBlocks, 1475 NumberOfCodeBlocksAsserted, 79 NumberOfCheckSat, 1504 ConstructedInterpolants, 27 QuantifiedInterpolants, 36433 SizeOfPredicates, 1116 NumberOfNonLiveVariables, 11446 ConjunctsInSsa, 4376 ConjunctsInUnsatCore, 22 InterpolantComputations, 1 PerfectInterpolantSequences, 3636/5008 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