/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/nla-digbench-scaling/ps4-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 08:11:17,776 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 08:11:17,842 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 08:11:17,845 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 08:11:17,846 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 08:11:17,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 08:11:17,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 08:11:17,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 08:11:17,867 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 08:11:17,870 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 08:11:17,870 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 08:11:17,870 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 08:11:17,870 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 08:11:17,871 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 08:11:17,871 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 08:11:17,872 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 08:11:17,872 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 08:11:17,872 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 08:11:17,872 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 08:11:17,872 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 08:11:17,872 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 08:11:17,873 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 08:11:17,874 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 08:11:17,874 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:11:17,875 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 08:11:17,875 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 08:11:17,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 08:11:17,876 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 08:11:17,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 08:11:17,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 08:11:17,876 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 08:11:18,051 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 08:11:18,069 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 08:11:18,071 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 08:11:18,071 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 08:11:18,072 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 08:11:18,072 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2023-12-21 08:11:18,988 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 08:11:19,122 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 08:11:19,122 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c [2023-12-21 08:11:19,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdcbd89a6/93720573c48242b6a8da158fd4a1dd04/FLAG77dfe9505 [2023-12-21 08:11:19,135 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdcbd89a6/93720573c48242b6a8da158fd4a1dd04 [2023-12-21 08:11:19,137 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 08:11:19,137 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 08:11:19,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 08:11:19,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 08:11:19,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 08:11:19,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,142 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a73563a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19, skipping insertion in model container [2023-12-21 08:11:19,142 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,156 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 08:11:19,270 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2023-12-21 08:11:19,288 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:11:19,295 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 08:11:19,303 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_unwindbound10.c[458,471] [2023-12-21 08:11:19,309 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 08:11:19,318 INFO L206 MainTranslator]: Completed translation [2023-12-21 08:11:19,319 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19 WrapperNode [2023-12-21 08:11:19,319 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 08:11:19,319 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 08:11:19,319 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 08:11:19,320 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 08:11:19,324 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,327 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,338 INFO L138 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 39 [2023-12-21 08:11:19,338 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 08:11:19,339 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 08:11:19,339 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 08:11:19,339 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 08:11:19,349 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,349 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,350 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,356 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 08:11:19,356 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,356 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,358 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,361 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,362 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,363 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,364 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 08:11:19,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 08:11:19,364 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 08:11:19,364 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 08:11:19,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (1/1) ... [2023-12-21 08:11:19,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 08:11:19,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:19,387 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 08:11:19,393 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 08:11:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 08:11:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 08:11:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 08:11:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 08:11:19,408 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 08:11:19,408 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 08:11:19,445 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 08:11:19,446 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 08:11:19,538 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 08:11:19,551 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 08:11:19,551 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 08:11:19,552 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:11:19 BoogieIcfgContainer [2023-12-21 08:11:19,552 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 08:11:19,553 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 08:11:19,553 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 08:11:19,555 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 08:11:19,555 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 08:11:19" (1/3) ... [2023-12-21 08:11:19,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:11:19, skipping insertion in model container [2023-12-21 08:11:19,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 08:11:19" (2/3) ... [2023-12-21 08:11:19,556 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@564f7c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 08:11:19, skipping insertion in model container [2023-12-21 08:11:19,556 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 08:11:19" (3/3) ... [2023-12-21 08:11:19,559 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_unwindbound10.c [2023-12-21 08:11:19,570 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 08:11:19,570 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 08:11:19,596 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 08:11:19,601 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;@4820fb6a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 08:11:19,601 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 08:11:19,604 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 08:11:19,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 08:11:19,609 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:19,609 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 08:11:19,610 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:19,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:19,614 INFO L85 PathProgramCache]: Analyzing trace with hash -2070802916, now seen corresponding path program 1 times [2023-12-21 08:11:19,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:19,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511152431] [2023-12-21 08:11:19,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:19,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:19,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:19,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511152431] [2023-12-21 08:11:19,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 08:11:19,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498753039] [2023-12-21 08:11:19,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:19,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:19,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:19,712 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 08:11:19,728 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 08:11:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:19,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 08:11:19,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:19,782 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 08:11:19,782 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 08:11:19,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498753039] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:11:19,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:11:19,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 08:11:19,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636009204] [2023-12-21 08:11:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:11:19,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 08:11:19,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:19,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 08:11:19,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:11:19,813 INFO L87 Difference]: Start difference. First operand has 15 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:19,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:19,835 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2023-12-21 08:11:19,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 08:11:19,837 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-21 08:11:19,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:19,844 INFO L225 Difference]: With dead ends: 29 [2023-12-21 08:11:19,844 INFO L226 Difference]: Without dead ends: 13 [2023-12-21 08:11:19,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 08:11:19,849 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:19,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:11:19,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-12-21 08:11:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-12-21 08:11:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.375) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:11:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2023-12-21 08:11:19,872 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 6 [2023-12-21 08:11:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:19,873 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2023-12-21 08:11:19,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2023-12-21 08:11:19,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 08:11:19,874 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:19,874 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:11:19,881 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 08:11:20,082 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 08:11:20,082 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:20,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:20,083 INFO L85 PathProgramCache]: Analyzing trace with hash -170804699, now seen corresponding path program 1 times [2023-12-21 08:11:20,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:20,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600805164] [2023-12-21 08:11:20,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:20,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:20,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600805164] [2023-12-21 08:11:20,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 08:11:20,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022158645] [2023-12-21 08:11:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:20,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:20,112 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 08:11:20,116 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 08:11:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:20,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-21 08:11:20,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:20,176 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 08:11:20,176 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 08:11:20,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022158645] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:11:20,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:11:20,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-21 08:11:20,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315467358] [2023-12-21 08:11:20,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:11:20,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-21 08:11:20,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-21 08:11:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 08:11:20,178 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:20,189 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-12-21 08:11:20,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-21 08:11:20,190 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 08:11:20,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:20,190 INFO L225 Difference]: With dead ends: 23 [2023-12-21 08:11:20,191 INFO L226 Difference]: Without dead ends: 15 [2023-12-21 08:11:20,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-21 08:11:20,192 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:20,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:11:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-12-21 08:11:20,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-12-21 08:11:20,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:11:20,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2023-12-21 08:11:20,195 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 7 [2023-12-21 08:11:20,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:20,195 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2023-12-21 08:11:20,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2023-12-21 08:11:20,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-12-21 08:11:20,196 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:20,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:11:20,204 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 08:11:20,404 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 08:11:20,405 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:20,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:20,405 INFO L85 PathProgramCache]: Analyzing trace with hash -169017239, now seen corresponding path program 1 times [2023-12-21 08:11:20,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:20,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187749140] [2023-12-21 08:11:20,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:20,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:20,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778354480] [2023-12-21 08:11:20,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:20,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:20,424 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 08:11:20,427 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 08:11:20,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:20,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 08:11:20,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:20,506 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 08:11:20,506 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 08:11:20,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187749140] [2023-12-21 08:11:20,507 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:11:20,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778354480] [2023-12-21 08:11:20,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778354480] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 08:11:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 08:11:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 08:11:20,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300885666] [2023-12-21 08:11:20,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 08:11:20,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 08:11:20,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:20,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 08:11:20,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 08:11:20,508 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:20,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:20,607 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-12-21 08:11:20,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 08:11:20,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-12-21 08:11:20,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:20,608 INFO L225 Difference]: With dead ends: 25 [2023-12-21 08:11:20,608 INFO L226 Difference]: Without dead ends: 21 [2023-12-21 08:11:20,609 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 08:11:20,609 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:20,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 08:11:20,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-12-21 08:11:20,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-12-21 08:11:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-12-21 08:11:20,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-12-21 08:11:20,615 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2023-12-21 08:11:20,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:20,615 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-12-21 08:11:20,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 08:11:20,615 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-12-21 08:11:20,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 08:11:20,617 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:20,617 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:11:20,626 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 08:11:20,824 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 08:11:20,824 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:20,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:20,825 INFO L85 PathProgramCache]: Analyzing trace with hash 867499275, now seen corresponding path program 1 times [2023-12-21 08:11:20,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:20,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708327161] [2023-12-21 08:11:20,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:20,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:20,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1537170731] [2023-12-21 08:11:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:20,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:20,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:20,836 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 08:11:20,847 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 08:11:20,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:20,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 08:11:20,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:11:20,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:11:20,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:11:20,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708327161] [2023-12-21 08:11:20,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:11:20,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537170731] [2023-12-21 08:11:20,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537170731] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:11:20,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:11:20,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2023-12-21 08:11:20,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051664235] [2023-12-21 08:11:20,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:11:20,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 08:11:20,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:20,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 08:11:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-12-21 08:11:20,959 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 08:11:21,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:21,027 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2023-12-21 08:11:21,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-12-21 08:11:21,028 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 15 [2023-12-21 08:11:21,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:21,028 INFO L225 Difference]: With dead ends: 55 [2023-12-21 08:11:21,028 INFO L226 Difference]: Without dead ends: 47 [2023-12-21 08:11:21,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-12-21 08:11:21,029 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:21,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 69 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:11:21,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-21 08:11:21,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2023-12-21 08:11:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.25) internal successors, (35), 31 states have internal predecessors, (35), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-12-21 08:11:21,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-12-21 08:11:21,035 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 15 [2023-12-21 08:11:21,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:21,035 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-12-21 08:11:21,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 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 08:11:21,036 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-12-21 08:11:21,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-12-21 08:11:21,036 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:21,036 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 08:11:21,045 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 08:11:21,236 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 08:11:21,237 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:21,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:21,237 INFO L85 PathProgramCache]: Analyzing trace with hash 869286735, now seen corresponding path program 1 times [2023-12-21 08:11:21,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:21,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970355797] [2023-12-21 08:11:21,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:21,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:21,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:21,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129421843] [2023-12-21 08:11:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:21,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:21,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:21,244 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 08:11:21,249 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 08:11:21,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:21,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 08:11:21,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:21,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:11:21,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:11:21,467 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:11:21,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:21,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970355797] [2023-12-21 08:11:21,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:11:21,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129421843] [2023-12-21 08:11:21,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129421843] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:11:21,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:11:21,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 11 [2023-12-21 08:11:21,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318023858] [2023-12-21 08:11:21,473 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:11:21,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 08:11:21,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 08:11:21,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-12-21 08:11:21,475 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:11:21,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:21,549 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2023-12-21 08:11:21,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 08:11:21,550 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2023-12-21 08:11:21,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:21,550 INFO L225 Difference]: With dead ends: 57 [2023-12-21 08:11:21,551 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 08:11:21,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-12-21 08:11:21,551 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:21,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 69 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:11:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 08:11:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2023-12-21 08:11:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 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 08:11:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-12-21 08:11:21,560 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2023-12-21 08:11:21,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:21,560 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-12-21 08:11:21,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 08:11:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-12-21 08:11:21,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 08:11:21,561 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:21,561 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2023-12-21 08:11:21,565 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 08:11:21,764 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 08:11:21,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:21,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash 24753612, now seen corresponding path program 1 times [2023-12-21 08:11:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:21,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356930462] [2023-12-21 08:11:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:21,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:21,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [202066312] [2023-12-21 08:11:21,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:21,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:21,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:21,772 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 08:11:21,774 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 08:11:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 08:11:21,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 08:11:21,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:21,925 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-12-21 08:11:21,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:11:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 08:11:22,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:22,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356930462] [2023-12-21 08:11:22,170 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:11:22,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202066312] [2023-12-21 08:11:22,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202066312] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:11:22,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:11:22,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 08:11:22,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428742935] [2023-12-21 08:11:22,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:11:22,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 08:11:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 08:11:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-12-21 08:11:22,172 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 08:11:26,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 08:11:26,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:26,387 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2023-12-21 08:11:26,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 08:11:26,387 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2023-12-21 08:11:26,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:26,388 INFO L225 Difference]: With dead ends: 49 [2023-12-21 08:11:26,388 INFO L226 Difference]: Without dead ends: 42 [2023-12-21 08:11:26,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-12-21 08:11:26,389 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:26,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 101 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 103 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-12-21 08:11:26,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-21 08:11:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-12-21 08:11:26,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-12-21 08:11:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-12-21 08:11:26,396 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2023-12-21 08:11:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:26,396 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-12-21 08:11:26,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 08:11:26,397 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-12-21 08:11:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-12-21 08:11:26,397 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:26,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2023-12-21 08:11:26,409 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 08:11:26,604 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 08:11:26,604 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:26,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:26,605 INFO L85 PathProgramCache]: Analyzing trace with hash -795795011, now seen corresponding path program 2 times [2023-12-21 08:11:26,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:26,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062466159] [2023-12-21 08:11:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:26,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:26,612 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:26,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [477057212] [2023-12-21 08:11:26,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 08:11:26,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:26,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:26,614 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 08:11:26,618 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 08:11:26,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 08:11:26,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:11:26,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2023-12-21 08:11:26,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:26,722 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 08:11:26,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:11:26,797 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 08:11:26,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:11:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062466159] [2023-12-21 08:11:26,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:11:26,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477057212] [2023-12-21 08:11:26,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477057212] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:11:26,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:11:26,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-12-21 08:11:26,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842254391] [2023-12-21 08:11:26,800 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:11:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 08:11:26,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:11:26,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 08:11:26,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2023-12-21 08:11:26,803 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 08:11:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:11:26,935 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2023-12-21 08:11:26,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 08:11:26,936 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 39 [2023-12-21 08:11:26,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:11:26,939 INFO L225 Difference]: With dead ends: 118 [2023-12-21 08:11:26,939 INFO L226 Difference]: Without dead ends: 113 [2023-12-21 08:11:26,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2023-12-21 08:11:26,941 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 08:11:26,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 86 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 08:11:26,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-12-21 08:11:26,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 88. [2023-12-21 08:11:26,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.106060606060606) internal successors, (73), 66 states have internal predecessors, (73), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 08:11:26,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 94 transitions. [2023-12-21 08:11:26,970 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 94 transitions. Word has length 39 [2023-12-21 08:11:26,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:11:26,970 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 94 transitions. [2023-12-21 08:11:26,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 08:11:26,970 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 94 transitions. [2023-12-21 08:11:26,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-12-21 08:11:26,972 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:11:26,972 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1] [2023-12-21 08:11:26,980 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 08:11:27,177 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 08:11:27,177 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:11:27,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:11:27,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1312813826, now seen corresponding path program 2 times [2023-12-21 08:11:27,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:11:27,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152208355] [2023-12-21 08:11:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:11:27,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:11:27,184 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:11:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943673762] [2023-12-21 08:11:27,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 08:11:27,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:11:27,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:11:27,185 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 08:11:27,211 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 08:11:27,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 08:11:27,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 08:11:27,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 32 conjunts are in the unsatisfiable core [2023-12-21 08:11:27,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 08:11:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 47 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 08:11:27,356 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 08:11:35,473 WARN L854 $PredicateComparison]: unable to prove that (or (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0)) (= (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 2)) (+ (* |c_ULTIMATE.start_main_~c~0#1| 2) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)))) is different from false [2023-12-21 08:11:43,512 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 08:11:51,749 WARN L293 SmtUtils]: Spent 8.24s 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 08:12:03,773 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 08:12:11,814 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12| 2))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 3)) 4) 0)))) is different from true [2023-12-21 08:12:23,840 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 08:12:39,953 WARN L293 SmtUtils]: Spent 8.10s on a formula simplification that was a NOOP. DAG size: 10 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-12-21 08:12:47,973 WARN L876 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (forall ((|v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| Int) (|v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12| Int)) (or (= (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18|)) (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12|) (* |v_ULTIMATE.start_main_~c~0#1_BEFORE_CALL_12| 2))) (= (mod (+ (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 3) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 2) (* |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| |v_ULTIMATE.start_main_~y~0#1_BEFORE_CALL_18| 3)) 4) 0))) (= c___VERIFIER_assert_~cond 0)) is different from true [2023-12-21 08:13:04,019 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| 3) (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 3))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-21 08:13:24,069 WARN L854 $PredicateComparison]: unable to prove that (or (= (+ (* |c_ULTIMATE.start_main_~c~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~c~0#1| 4)) (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1|) (* |c_ULTIMATE.start_main_~y~0#1| 4))) (not (= (mod (+ (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 2) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3) (* |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| |c_ULTIMATE.start_main_~y~0#1| 3)) 4) 0))) is different from false [2023-12-21 08:13:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 15 proven. 6 refuted. 6 times theorem prover too weak. 28 trivial. 35 not checked. [2023-12-21 08:13:36,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 08:13:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152208355] [2023-12-21 08:13:36,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 08:13:36,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943673762] [2023-12-21 08:13:36,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943673762] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 08:13:36,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 08:13:36,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 22 [2023-12-21 08:13:36,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759063424] [2023-12-21 08:13:36,095 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 08:13:36,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-21 08:13:36,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 08:13:36,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-21 08:13:36,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=230, Unknown=5, NotChecked=170, Total=462 [2023-12-21 08:13:36,096 INFO L87 Difference]: Start difference. First operand 88 states and 94 transitions. Second operand has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 08:13:36,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 08:13:36,338 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2023-12-21 08:13:36,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-21 08:13:36,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 45 [2023-12-21 08:13:36,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 08:13:36,339 INFO L225 Difference]: With dead ends: 94 [2023-12-21 08:13:36,339 INFO L226 Difference]: Without dead ends: 88 [2023-12-21 08:13:36,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=123, Invalid=542, Unknown=5, NotChecked=260, Total=930 [2023-12-21 08:13:36,340 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 08:13:36,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 185 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 140 Invalid, 0 Unknown, 170 Unchecked, 0.1s Time] [2023-12-21 08:13:36,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-12-21 08:13:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2023-12-21 08:13:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 08:13:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2023-12-21 08:13:36,349 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 45 [2023-12-21 08:13:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 08:13:36,349 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2023-12-21 08:13:36,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 08:13:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2023-12-21 08:13:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-12-21 08:13:36,350 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 08:13:36,350 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1] [2023-12-21 08:13:36,370 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 08:13:36,550 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 08:13:36,551 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 08:13:36,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 08:13:36,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1242040609, now seen corresponding path program 3 times [2023-12-21 08:13:36,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 08:13:36,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256007087] [2023-12-21 08:13:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 08:13:36,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 08:13:36,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 08:13:36,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1123509582] [2023-12-21 08:13:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 08:13:36,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 08:13:36,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 08:13:36,560 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 08:13:36,561 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 08:13:36,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-12-21 08:13:36,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2023-12-21 08:13:36,685 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-12-21 08:13:36,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-12-21 08:13:36,735 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-12-21 08:13:36,735 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-12-21 08:13:36,736 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 08:13:36,742 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 08:13:36,937 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 08:13:36,940 INFO L445 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1] [2023-12-21 08:13:36,942 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 08:13:36,972 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 08:13:36 BoogieIcfgContainer [2023-12-21 08:13:36,972 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 08:13:36,973 INFO L158 Benchmark]: Toolchain (without parser) took 137835.18ms. Allocated memory was 202.4MB in the beginning and 263.2MB in the end (delta: 60.8MB). Free memory was 166.0MB in the beginning and 140.1MB in the end (delta: 25.9MB). Peak memory consumption was 87.1MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,973 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 160.1MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 08:13:36,973 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.78ms. Allocated memory is still 202.4MB. Free memory was 165.6MB in the beginning and 154.5MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,973 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.04ms. Allocated memory is still 202.4MB. Free memory was 154.5MB in the beginning and 153.3MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,973 INFO L158 Benchmark]: Boogie Preprocessor took 24.91ms. Allocated memory is still 202.4MB. Free memory was 153.3MB in the beginning and 151.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,974 INFO L158 Benchmark]: RCFGBuilder took 187.67ms. Allocated memory is still 202.4MB. Free memory was 151.3MB in the beginning and 140.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,974 INFO L158 Benchmark]: TraceAbstraction took 137419.11ms. Allocated memory was 202.4MB in the beginning and 263.2MB in the end (delta: 60.8MB). Free memory was 140.2MB in the beginning and 140.1MB in the end (delta: 73.8kB). Peak memory consumption was 61.9MB. Max. memory is 8.0GB. [2023-12-21 08:13:36,975 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 202.4MB. Free memory is still 160.1MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 180.78ms. Allocated memory is still 202.4MB. Free memory was 165.6MB in the beginning and 154.5MB in the end (delta: 11.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.04ms. Allocated memory is still 202.4MB. Free memory was 154.5MB in the beginning and 153.3MB in the end (delta: 1.2MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.91ms. Allocated memory is still 202.4MB. Free memory was 153.3MB in the beginning and 151.3MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 187.67ms. Allocated memory is still 202.4MB. Free memory was 151.3MB in the beginning and 140.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 137419.11ms. Allocated memory was 202.4MB in the beginning and 263.2MB in the end (delta: 60.8MB). Free memory was 140.2MB in the beginning and 140.1MB in the end (delta: 73.8kB). Peak memory consumption was 61.9MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L23] y = 0 [L24] x = 0 [L25] c = 0 VAL [c=0, counter=0, k=11, x=0, y=0] [L27] EXPR counter++ VAL [c=0, counter=1, k=11, x=0, y=0] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=1] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=1] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=0, counter=1, k=11, x=0, y=0] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=1, counter=1, k=11, x=1, y=1] [L27] EXPR counter++ VAL [c=1, counter=2, k=11, x=1, y=1] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=2] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=2] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=1, counter=2, k=11, x=1, y=1] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=2, counter=2, k=11, x=9, y=2] [L27] EXPR counter++ VAL [c=2, counter=3, k=11, x=9, y=2] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=3] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=3] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=2, counter=3, k=11, x=9, y=2] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=3, counter=3, k=11, x=36, y=3] [L27] EXPR counter++ VAL [c=3, counter=4, k=11, x=36, y=3] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=4] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=4] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=3, counter=4, k=11, x=36, y=3] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=4, counter=4, k=11, x=100, y=4] [L27] EXPR counter++ VAL [c=4, counter=5, k=11, x=100, y=4] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=5] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=5] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=4, counter=5, k=11, x=100, y=4] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=5, counter=5, k=11, x=225, y=5] [L27] EXPR counter++ VAL [c=5, counter=6, k=11, x=225, y=5] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=6] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=6] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=5, counter=6, k=11, x=225, y=5] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=6, counter=6, k=11, x=441, y=6] [L27] EXPR counter++ VAL [c=6, counter=7, k=11, x=441, y=6] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=7] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=7] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=6, counter=7, k=11, x=441, y=6] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=7, counter=7, k=11, x=784, y=7] [L27] EXPR counter++ VAL [c=7, counter=8, k=11, x=784, y=7] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=8] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=8] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=7, counter=8, k=11, x=784, y=7] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=8, counter=8, k=11, x=1296, y=8] [L27] EXPR counter++ VAL [c=8, counter=9, k=11, x=1296, y=8] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=9] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=9] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=8, counter=9, k=11, x=1296, y=8] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=9, counter=9, k=11, x=2025, y=9] [L27] EXPR counter++ VAL [c=9, counter=10, k=11, x=2025, y=9] [L27] COND TRUE counter++<10 [L28] CALL __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [\old(cond)=1, counter=10] [L10] COND FALSE !(!(cond)) VAL [\old(cond)=1, cond=1, counter=10] [L28] RET __VERIFIER_assert(4*x - y*y*y*y - 2*y*y*y - y*y == 0) VAL [c=9, counter=10, k=11, x=2025, y=9] [L30] COND FALSE !(!(c < k)) [L33] c = c + 1 [L34] y = y + 1 [L35] x = y * y * y + x VAL [c=10, counter=10, k=11, x=3025, y=10] [L27] EXPR counter++ VAL [c=10, counter=11, k=11, x=3025, y=10] [L27] COND FALSE !(counter++<10) [L37] CALL __VERIFIER_assert(k*y - (y*y) == 0) VAL [\old(cond)=0, counter=11] [L10] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, counter=11] [L12] reach_error() VAL [\old(cond)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 137.4s, OverallIterations: 9, TraceHistogramMax: 11, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 178 SdHoareTripleChecker+Valid, 4.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 173 mSDsluCounter, 609 SdHoareTripleChecker+Invalid, 4.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 170 IncrementalHoareTripleChecker+Unchecked, 502 mSDsCounter, 46 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 425 IncrementalHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 46 mSolverCounterUnsat, 107 mSDtfsCounter, 425 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 310 GetRequests, 211 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 5 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 20.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=7, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 35 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 129.8s InterpolantComputationTime, 255 NumberOfCodeBlocks, 255 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 277 ConstructedInterpolants, 3 QuantifiedInterpolants, 1718 SizeOfPredicates, 20 NumberOfNonLiveVariables, 607 ConjunctsInSsa, 110 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 148/350 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 proved your program to be incorrect! [2023-12-21 08:13:36,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...