/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation true -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-19 19:52:11,350 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-19 19:52:11,405 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-19 19:52:11,408 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-19 19:52:11,408 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-19 19:52:11,437 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-19 19:52:11,437 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-19 19:52:11,438 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-19 19:52:11,438 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-19 19:52:11,442 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-19 19:52:11,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-19 19:52:11,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-19 19:52:11,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-19 19:52:11,443 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-19 19:52:11,443 INFO L153 SettingsManager]: * Use SBE=true [2023-12-19 19:52:11,444 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-19 19:52:11,444 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-19 19:52:11,444 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-19 19:52:11,444 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-19 19:52:11,444 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-19 19:52:11,444 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-19 19:52:11,449 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-19 19:52:11,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-19 19:52:11,449 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-19 19:52:11,449 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-19 19:52:11,450 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-19 19:52:11,450 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:52:11,451 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-19 19:52:11,451 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-19 19:52:11,452 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-19 19:52:11,452 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-19 19:52:11,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-19 19:52:11,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-19 19:52:11,453 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> true [2023-12-19 19:52:11,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-19 19:52:11,638 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-19 19:52:11,639 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-19 19:52:11,640 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-19 19:52:11,642 INFO L274 PluginConnector]: CDTParser initialized [2023-12-19 19:52:11,642 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-12-19 19:52:12,635 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-19 19:52:12,796 INFO L384 CDTParser]: Found 1 translation units. [2023-12-19 19:52:12,796 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_unwindbound20.c [2023-12-19 19:52:12,802 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89928a723/b53ce223d2ba40b3a25c0919f176a059/FLAG2c948baf6 [2023-12-19 19:52:12,812 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/89928a723/b53ce223d2ba40b3a25c0919f176a059 [2023-12-19 19:52:12,816 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-19 19:52:12,816 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-19 19:52:12,817 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-19 19:52:12,817 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-19 19:52:12,835 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-19 19:52:12,836 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:52:12" (1/1) ... [2023-12-19 19:52:12,837 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333b6280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:12, skipping insertion in model container [2023-12-19 19:52:12,837 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.12 07:52:12" (1/1) ... [2023-12-19 19:52:12,855 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-19 19:52:12,969 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/egcd2-ll_unwindbound20.c[490,503] [2023-12-19 19:52:12,983 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:52:12,989 INFO L202 MainTranslator]: Completed pre-run [2023-12-19 19:52:12,996 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/egcd2-ll_unwindbound20.c[490,503] [2023-12-19 19:52:13,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-19 19:52:13,012 INFO L206 MainTranslator]: Completed translation [2023-12-19 19:52:13,012 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13 WrapperNode [2023-12-19 19:52:13,012 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-19 19:52:13,013 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-19 19:52:13,013 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-19 19:52:13,013 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-19 19:52:13,019 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,040 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,053 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 86 [2023-12-19 19:52:13,054 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-19 19:52:13,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-19 19:52:13,054 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-19 19:52:13,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-19 19:52:13,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,061 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,068 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]. [2023-12-19 19:52:13,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,070 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,072 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,073 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,073 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,074 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-19 19:52:13,075 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-19 19:52:13,075 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-19 19:52:13,075 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-19 19:52:13,075 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (1/1) ... [2023-12-19 19:52:13,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-19 19:52:13,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:13,095 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) [2023-12-19 19:52:13,097 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 [2023-12-19 19:52:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-19 19:52:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-19 19:52:13,113 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-19 19:52:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-19 19:52:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-19 19:52:13,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-19 19:52:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-19 19:52:13,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-19 19:52:13,152 INFO L241 CfgBuilder]: Building ICFG [2023-12-19 19:52:13,154 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-19 19:52:13,266 INFO L282 CfgBuilder]: Performing block encoding [2023-12-19 19:52:13,286 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-19 19:52:13,286 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-12-19 19:52:13,286 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:52:13 BoogieIcfgContainer [2023-12-19 19:52:13,286 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-19 19:52:13,288 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-19 19:52:13,288 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-19 19:52:13,290 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-19 19:52:13,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.12 07:52:12" (1/3) ... [2023-12-19 19:52:13,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7add2e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:52:13, skipping insertion in model container [2023-12-19 19:52:13,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.12 07:52:13" (2/3) ... [2023-12-19 19:52:13,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7add2e51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.12 07:52:13, skipping insertion in model container [2023-12-19 19:52:13,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.12 07:52:13" (3/3) ... [2023-12-19 19:52:13,292 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_unwindbound20.c [2023-12-19 19:52:13,303 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-19 19:52:13,303 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-19 19:52:13,331 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-19 19:52:13,335 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;@500c0d0b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-19 19:52:13,335 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-19 19:52:13,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-19 19:52:13,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-12-19 19:52:13,351 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:13,351 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:13,352 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:13,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash -689848145, now seen corresponding path program 1 times [2023-12-19 19:52:13,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70613008] [2023-12-19 19:52:13,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:13,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:13,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70613008] [2023-12-19 19:52:13,467 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-19 19:52:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337727756] [2023-12-19 19:52:13,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:13,470 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) [2023-12-19 19:52:13,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-19 19:52:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:13,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-19 19:52:13,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-19 19:52:13,543 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:52:13,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337727756] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:52:13,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:52:13,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-19 19:52:13,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881540985] [2023-12-19 19:52:13,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-19 19:52:13,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:13,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-19 19:52:13,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:52:13,572 INFO L87 Difference]: Start difference. First operand has 31 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 19 states have internal predecessors, (26), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 19:52:13,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:13,591 INFO L93 Difference]: Finished difference Result 60 states and 99 transitions. [2023-12-19 19:52:13,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-19 19:52:13,594 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2023-12-19 19:52:13,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:13,598 INFO L225 Difference]: With dead ends: 60 [2023-12-19 19:52:13,598 INFO L226 Difference]: Without dead ends: 29 [2023-12-19 19:52:13,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-19 19:52:13,603 INFO L413 NwaCegarLoop]: 40 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, 40 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 [2023-12-19 19:52:13,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:13,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-12-19 19:52:13,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-12-19 19:52:13,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.3125) internal successors, (21), 18 states have internal predecessors, (21), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 19:52:13,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2023-12-19 19:52:13,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 27 [2023-12-19 19:52:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:13,628 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2023-12-19 19:52:13,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 19:52:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2023-12-19 19:52:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-19 19:52:13,629 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:13,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:13,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-19 19:52:13,835 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 [2023-12-19 19:52:13,836 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:13,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:13,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1989097615, now seen corresponding path program 1 times [2023-12-19 19:52:13,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:13,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230521638] [2023-12-19 19:52:13,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:13,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:13,848 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562114195] [2023-12-19 19:52:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:13,863 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) [2023-12-19 19:52:13,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-19 19:52:13,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:13,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2023-12-19 19:52:13,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 19:52:13,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:52:13,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:13,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230521638] [2023-12-19 19:52:13,976 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:13,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562114195] [2023-12-19 19:52:13,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562114195] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:52:13,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:52:13,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-12-19 19:52:13,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462519999] [2023-12-19 19:52:13,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:13,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-12-19 19:52:13,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:13,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-12-19 19:52:13,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 19:52:13,979 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:13,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:13,992 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2023-12-19 19:52:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-12-19 19:52:13,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2023-12-19 19:52:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:13,994 INFO L225 Difference]: With dead ends: 39 [2023-12-19 19:52:13,994 INFO L226 Difference]: Without dead ends: 31 [2023-12-19 19:52:13,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-12-19 19:52:13,995 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:13,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 97 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:13,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-12-19 19:52:13,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-12-19 19:52:14,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 19:52:14,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-12-19 19:52:14,001 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 28 [2023-12-19 19:52:14,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:14,001 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-12-19 19:52:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:14,002 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-12-19 19:52:14,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-19 19:52:14,002 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:14,002 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:14,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:14,207 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 [2023-12-19 19:52:14,208 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:14,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1539070609, now seen corresponding path program 1 times [2023-12-19 19:52:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:14,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668094236] [2023-12-19 19:52:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:14,231 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:14,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861494960] [2023-12-19 19:52:14,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:14,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:14,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:14,246 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) [2023-12-19 19:52:14,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-19 19:52:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:14,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 19:52:14,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:14,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 19:52:14,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:14,442 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 19:52:14,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668094236] [2023-12-19 19:52:14,442 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:14,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861494960] [2023-12-19 19:52:14,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861494960] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:14,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:14,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-12-19 19:52:14,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130690072] [2023-12-19 19:52:14,443 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:14,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:52:14,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:14,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:52:14,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-12-19 19:52:14,444 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 19:52:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:14,512 INFO L93 Difference]: Finished difference Result 48 states and 66 transitions. [2023-12-19 19:52:14,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:52:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2023-12-19 19:52:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:14,515 INFO L225 Difference]: With dead ends: 48 [2023-12-19 19:52:14,515 INFO L226 Difference]: Without dead ends: 40 [2023-12-19 19:52:14,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:52:14,518 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 29 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:14,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 97 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:14,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-12-19 19:52:14,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2023-12-19 19:52:14,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 10 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 19:52:14,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2023-12-19 19:52:14,529 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 29 [2023-12-19 19:52:14,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:14,530 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2023-12-19 19:52:14,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-19 19:52:14,530 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-12-19 19:52:14,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-12-19 19:52:14,530 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:14,531 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:14,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:14,735 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 [2023-12-19 19:52:14,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:14,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:14,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1634889762, now seen corresponding path program 1 times [2023-12-19 19:52:14,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:14,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655643352] [2023-12-19 19:52:14,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:14,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:14,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:14,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74369515] [2023-12-19 19:52:14,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:14,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:14,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:14,746 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) [2023-12-19 19:52:14,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-19 19:52:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:14,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-19 19:52:14,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 19:52:14,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:14,900 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 19:52:14,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:14,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655643352] [2023-12-19 19:52:14,901 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:14,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74369515] [2023-12-19 19:52:14,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74369515] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:14,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:14,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-12-19 19:52:14,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764335564] [2023-12-19 19:52:14,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:14,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:52:14,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:14,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:52:14,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-12-19 19:52:14,904 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:14,948 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2023-12-19 19:52:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:52:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 31 [2023-12-19 19:52:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:14,949 INFO L225 Difference]: With dead ends: 38 [2023-12-19 19:52:14,949 INFO L226 Difference]: Without dead ends: 36 [2023-12-19 19:52:14,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:52:14,950 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 8 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 116 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-12-19 19:52:14,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-12-19 19:52:14,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 23 states have internal predecessors, (27), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 19:52:14,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-12-19 19:52:14,956 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 31 [2023-12-19 19:52:14,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:14,956 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-12-19 19:52:14,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:14,956 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-12-19 19:52:14,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-19 19:52:14,957 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:14,957 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:14,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-12-19 19:52:15,164 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 [2023-12-19 19:52:15,165 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:15,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:15,166 INFO L85 PathProgramCache]: Analyzing trace with hash 753217482, now seen corresponding path program 1 times [2023-12-19 19:52:15,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:15,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523961285] [2023-12-19 19:52:15,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:15,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:15,182 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:15,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276415753] [2023-12-19 19:52:15,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:15,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:15,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:15,188 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) [2023-12-19 19:52:15,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-19 19:52:15,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:15,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 19:52:15,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 19:52:15,259 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:52:15,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523961285] [2023-12-19 19:52:15,259 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276415753] [2023-12-19 19:52:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276415753] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:52:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:52:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-19 19:52:15,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517746584] [2023-12-19 19:52:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:52:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:15,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:52:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:52:15,261 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:15,275 INFO L93 Difference]: Finished difference Result 61 states and 79 transitions. [2023-12-19 19:52:15,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-19 19:52:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 34 [2023-12-19 19:52:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:15,276 INFO L225 Difference]: With dead ends: 61 [2023-12-19 19:52:15,276 INFO L226 Difference]: Without dead ends: 38 [2023-12-19 19:52:15,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:52:15,277 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:15,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-12-19 19:52:15,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-12-19 19:52:15,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 10 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-19 19:52:15,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 48 transitions. [2023-12-19 19:52:15,283 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 48 transitions. Word has length 34 [2023-12-19 19:52:15,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:15,283 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 48 transitions. [2023-12-19 19:52:15,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-19 19:52:15,283 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 48 transitions. [2023-12-19 19:52:15,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-12-19 19:52:15,283 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:15,283 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:15,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-12-19 19:52:15,488 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 [2023-12-19 19:52:15,488 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:15,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash 120049922, now seen corresponding path program 1 times [2023-12-19 19:52:15,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:15,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91038938] [2023-12-19 19:52:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:15,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:15,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:15,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54440524] [2023-12-19 19:52:15,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:15,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:15,497 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) [2023-12-19 19:52:15,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-19 19:52:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:15,534 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 19:52:15,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:15,676 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-19 19:52:15,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:15,756 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-19 19:52:15,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:15,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91038938] [2023-12-19 19:52:15,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:15,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54440524] [2023-12-19 19:52:15,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54440524] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:15,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:15,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-12-19 19:52:15,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289610315] [2023-12-19 19:52:15,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:15,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:52:15,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:15,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:52:15,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:52:15,758 INFO L87 Difference]: Start difference. First operand 38 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 19:52:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:15,786 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2023-12-19 19:52:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:52:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2023-12-19 19:52:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:15,787 INFO L225 Difference]: With dead ends: 52 [2023-12-19 19:52:15,787 INFO L226 Difference]: Without dead ends: 50 [2023-12-19 19:52:15,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-19 19:52:15,788 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 7 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:15,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 133 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:15,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-12-19 19:52:15,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2023-12-19 19:52:15,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 31 states have internal predecessors, (37), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-19 19:52:15,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 64 transitions. [2023-12-19 19:52:15,798 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 64 transitions. Word has length 36 [2023-12-19 19:52:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:15,798 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 64 transitions. [2023-12-19 19:52:15,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-19 19:52:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 64 transitions. [2023-12-19 19:52:15,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-12-19 19:52:15,798 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:15,799 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:15,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:16,003 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 [2023-12-19 19:52:16,003 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:16,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:16,004 INFO L85 PathProgramCache]: Analyzing trace with hash 391757342, now seen corresponding path program 1 times [2023-12-19 19:52:16,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:16,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563495864] [2023-12-19 19:52:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:16,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:16,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:16,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1320879034] [2023-12-19 19:52:16,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:16,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:16,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:16,036 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) [2023-12-19 19:52:16,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-19 19:52:16,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:16,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-19 19:52:16,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:16,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-19 19:52:16,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-19 19:52:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563495864] [2023-12-19 19:52:16,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:16,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320879034] [2023-12-19 19:52:16,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320879034] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:16,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:16,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-12-19 19:52:16,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763156498] [2023-12-19 19:52:16,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:16,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:52:16,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:16,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:52:16,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:52:16,281 INFO L87 Difference]: Start difference. First operand 49 states and 64 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:52:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:16,314 INFO L93 Difference]: Finished difference Result 56 states and 70 transitions. [2023-12-19 19:52:16,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:52:16,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 41 [2023-12-19 19:52:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:16,315 INFO L225 Difference]: With dead ends: 56 [2023-12-19 19:52:16,315 INFO L226 Difference]: Without dead ends: 54 [2023-12-19 19:52:16,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-19 19:52:16,316 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 7 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:16,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:16,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-12-19 19:52:16,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2023-12-19 19:52:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 14 states have call successors, (14), 5 states have call predecessors, (14), 5 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-19 19:52:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 67 transitions. [2023-12-19 19:52:16,323 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 67 transitions. Word has length 41 [2023-12-19 19:52:16,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:16,323 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 67 transitions. [2023-12-19 19:52:16,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-19 19:52:16,323 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 67 transitions. [2023-12-19 19:52:16,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-12-19 19:52:16,324 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:16,324 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:16,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-12-19 19:52:16,529 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 [2023-12-19 19:52:16,529 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:16,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:16,529 INFO L85 PathProgramCache]: Analyzing trace with hash 439925314, now seen corresponding path program 1 times [2023-12-19 19:52:16,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:16,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834981566] [2023-12-19 19:52:16,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:16,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:16,535 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:16,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286999723] [2023-12-19 19:52:16,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:16,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:16,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:16,538 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) [2023-12-19 19:52:16,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-19 19:52:16,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:16,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-19 19:52:16,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:16,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-19 19:52:16,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834981566] [2023-12-19 19:52:20,796 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286999723] [2023-12-19 19:52:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286999723] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:20,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-12-19 19:52:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129271395] [2023-12-19 19:52:20,796 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-19 19:52:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-19 19:52:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=68, Unknown=1, NotChecked=0, Total=90 [2023-12-19 19:52:20,797 INFO L87 Difference]: Start difference. First operand 53 states and 67 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-19 19:52:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:20,870 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2023-12-19 19:52:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-19 19:52:20,870 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-12-19 19:52:20,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:20,871 INFO L225 Difference]: With dead ends: 60 [2023-12-19 19:52:20,871 INFO L226 Difference]: Without dead ends: 58 [2023-12-19 19:52:20,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2023-12-19 19:52:20,871 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:20,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 121 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:52:20,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-12-19 19:52:20,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2023-12-19 19:52:20,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 37 states have internal predecessors, (43), 14 states have call successors, (14), 6 states have call predecessors, (14), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2023-12-19 19:52:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-12-19 19:52:20,879 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 46 [2023-12-19 19:52:20,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:20,880 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-12-19 19:52:20,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-12-19 19:52:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-12-19 19:52:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-12-19 19:52:20,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:20,880 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:20,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:21,085 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 [2023-12-19 19:52:21,086 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:21,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:21,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1428774585, now seen corresponding path program 1 times [2023-12-19 19:52:21,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:21,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962199645] [2023-12-19 19:52:21,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:21,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:21,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:21,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1412843989] [2023-12-19 19:52:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:21,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:21,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:21,107 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) [2023-12-19 19:52:21,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-19 19:52:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:21,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 19:52:21,148 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 19:52:21,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:21,244 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 19:52:21,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:21,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962199645] [2023-12-19 19:52:21,244 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:21,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412843989] [2023-12-19 19:52:21,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412843989] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:21,244 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:21,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 19:52:21,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403731050] [2023-12-19 19:52:21,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:21,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 19:52:21,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:21,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 19:52:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:52:21,246 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-19 19:52:21,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:21,349 INFO L93 Difference]: Finished difference Result 210 states and 249 transitions. [2023-12-19 19:52:21,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 19:52:21,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 55 [2023-12-19 19:52:21,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:21,351 INFO L225 Difference]: With dead ends: 210 [2023-12-19 19:52:21,351 INFO L226 Difference]: Without dead ends: 202 [2023-12-19 19:52:21,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2023-12-19 19:52:21,351 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 73 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:21,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 146 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:52:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-12-19 19:52:21,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 194. [2023-12-19 19:52:21,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 124 states have (on average 1.1935483870967742) internal successors, (148), 128 states have internal predecessors, (148), 44 states have call successors, (44), 25 states have call predecessors, (44), 25 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2023-12-19 19:52:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 232 transitions. [2023-12-19 19:52:21,405 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 232 transitions. Word has length 55 [2023-12-19 19:52:21,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:21,406 INFO L495 AbstractCegarLoop]: Abstraction has 194 states and 232 transitions. [2023-12-19 19:52:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-19 19:52:21,406 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 232 transitions. [2023-12-19 19:52:21,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-12-19 19:52:21,409 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:21,409 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:21,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-19 19:52:21,613 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 [2023-12-19 19:52:21,614 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:21,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:21,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1348925863, now seen corresponding path program 1 times [2023-12-19 19:52:21,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:21,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267230907] [2023-12-19 19:52:21,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:21,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:21,628 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:21,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326002776] [2023-12-19 19:52:21,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:21,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:21,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:21,632 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:21,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-19 19:52:21,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:21,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-19 19:52:21,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-19 19:52:21,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-19 19:52:21,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267230907] [2023-12-19 19:52:21,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:21,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326002776] [2023-12-19 19:52:21,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326002776] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:21,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:21,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-19 19:52:21,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539708575] [2023-12-19 19:52:21,823 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:21,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-19 19:52:21,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:21,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-19 19:52:21,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-19 19:52:21,823 INFO L87 Difference]: Start difference. First operand 194 states and 232 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-19 19:52:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:21,970 INFO L93 Difference]: Finished difference Result 278 states and 363 transitions. [2023-12-19 19:52:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 19:52:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 56 [2023-12-19 19:52:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:21,972 INFO L225 Difference]: With dead ends: 278 [2023-12-19 19:52:21,972 INFO L226 Difference]: Without dead ends: 258 [2023-12-19 19:52:21,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 99 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-12-19 19:52:21,972 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 70 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:21,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 319 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:52:21,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-12-19 19:52:21,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 234. [2023-12-19 19:52:21,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 151 states have (on average 1.2251655629139073) internal successors, (185), 154 states have internal predecessors, (185), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-12-19 19:52:21,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 298 transitions. [2023-12-19 19:52:21,996 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 298 transitions. Word has length 56 [2023-12-19 19:52:21,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:21,996 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 298 transitions. [2023-12-19 19:52:21,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2023-12-19 19:52:21,996 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 298 transitions. [2023-12-19 19:52:21,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-12-19 19:52:21,997 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:21,997 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:22,004 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-19 19:52:22,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-19 19:52:22,201 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:22,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:22,202 INFO L85 PathProgramCache]: Analyzing trace with hash -848672706, now seen corresponding path program 1 times [2023-12-19 19:52:22,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:22,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896160305] [2023-12-19 19:52:22,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:22,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:22,208 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:22,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2034294082] [2023-12-19 19:52:22,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:22,209 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:22,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-19 19:52:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:22,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-19 19:52:22,251 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 19:52:22,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-12-19 19:52:22,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:22,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896160305] [2023-12-19 19:52:22,351 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:22,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034294082] [2023-12-19 19:52:22,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034294082] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:22,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:22,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-12-19 19:52:22,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135426463] [2023-12-19 19:52:22,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:22,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-12-19 19:52:22,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:22,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-12-19 19:52:22,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-12-19 19:52:22,352 INFO L87 Difference]: Start difference. First operand 234 states and 298 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-19 19:52:22,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:22,450 INFO L93 Difference]: Finished difference Result 343 states and 447 transitions. [2023-12-19 19:52:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-12-19 19:52:22,451 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 58 [2023-12-19 19:52:22,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:22,452 INFO L225 Difference]: With dead ends: 343 [2023-12-19 19:52:22,452 INFO L226 Difference]: Without dead ends: 247 [2023-12-19 19:52:22,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2023-12-19 19:52:22,453 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 66 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:22,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 173 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:52:22,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2023-12-19 19:52:22,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 243. [2023-12-19 19:52:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 160 states have (on average 1.175) internal successors, (188), 163 states have internal predecessors, (188), 58 states have call successors, (58), 24 states have call predecessors, (58), 24 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2023-12-19 19:52:22,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 301 transitions. [2023-12-19 19:52:22,478 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 301 transitions. Word has length 58 [2023-12-19 19:52:22,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:22,478 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 301 transitions. [2023-12-19 19:52:22,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 5 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2023-12-19 19:52:22,478 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 301 transitions. [2023-12-19 19:52:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-12-19 19:52:22,479 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:22,479 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:22,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:22,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-19 19:52:22,684 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:22,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:22,684 INFO L85 PathProgramCache]: Analyzing trace with hash -421956392, now seen corresponding path program 1 times [2023-12-19 19:52:22,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:22,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148992953] [2023-12-19 19:52:22,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:22,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:22,690 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:22,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [782002592] [2023-12-19 19:52:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:22,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:22,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:22,691 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:22,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-19 19:52:22,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:22,745 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-19 19:52:22,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:22,815 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2023-12-19 19:52:22,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:22,904 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-19 19:52:22,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148992953] [2023-12-19 19:52:22,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:22,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782002592] [2023-12-19 19:52:22,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782002592] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:22,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:22,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 13 [2023-12-19 19:52:22,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436605862] [2023-12-19 19:52:22,905 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:22,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-12-19 19:52:22,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:22,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-12-19 19:52:22,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2023-12-19 19:52:22,906 INFO L87 Difference]: Start difference. First operand 243 states and 301 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-19 19:52:23,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:23,140 INFO L93 Difference]: Finished difference Result 329 states and 428 transitions. [2023-12-19 19:52:23,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-19 19:52:23,140 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 63 [2023-12-19 19:52:23,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:23,143 INFO L225 Difference]: With dead ends: 329 [2023-12-19 19:52:23,143 INFO L226 Difference]: Without dead ends: 323 [2023-12-19 19:52:23,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-12-19 19:52:23,143 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 39 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:23,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 377 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:52:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-12-19 19:52:23,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 290. [2023-12-19 19:52:23,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 193 states have (on average 1.1968911917098446) internal successors, (231), 202 states have internal predecessors, (231), 69 states have call successors, (69), 27 states have call predecessors, (69), 27 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2023-12-19 19:52:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 365 transitions. [2023-12-19 19:52:23,194 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 365 transitions. Word has length 63 [2023-12-19 19:52:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:23,195 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 365 transitions. [2023-12-19 19:52:23,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 6 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2023-12-19 19:52:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 365 transitions. [2023-12-19 19:52:23,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-12-19 19:52:23,195 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:23,195 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:23,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:23,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-19 19:52:23,400 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:23,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:23,401 INFO L85 PathProgramCache]: Analyzing trace with hash -245166072, now seen corresponding path program 2 times [2023-12-19 19:52:23,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:23,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136754908] [2023-12-19 19:52:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:23,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:23,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:23,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1948594126] [2023-12-19 19:52:23,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:52:23,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:23,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:23,409 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:23,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-19 19:52:23,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:52:23,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:52:23,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 40 conjunts are in the unsatisfiable core [2023-12-19 19:52:23,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 26 proven. 21 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-12-19 19:52:23,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:23,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:23,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136754908] [2023-12-19 19:52:23,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:23,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948594126] [2023-12-19 19:52:23,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948594126] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:23,953 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:23,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2023-12-19 19:52:23,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951913889] [2023-12-19 19:52:23,954 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:23,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-19 19:52:23,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:23,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-19 19:52:23,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2023-12-19 19:52:23,954 INFO L87 Difference]: Start difference. First operand 290 states and 365 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-19 19:52:24,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:24,235 INFO L93 Difference]: Finished difference Result 314 states and 392 transitions. [2023-12-19 19:52:24,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 19:52:24,236 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 68 [2023-12-19 19:52:24,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:24,237 INFO L225 Difference]: With dead ends: 314 [2023-12-19 19:52:24,237 INFO L226 Difference]: Without dead ends: 312 [2023-12-19 19:52:24,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:52:24,238 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 54 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 282 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:24,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 254 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 282 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:52:24,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2023-12-19 19:52:24,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2023-12-19 19:52:24,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 205 states have (on average 1.1951219512195121) internal successors, (245), 214 states have internal predecessors, (245), 73 states have call successors, (73), 30 states have call predecessors, (73), 30 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-19 19:52:24,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 387 transitions. [2023-12-19 19:52:24,269 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 387 transitions. Word has length 68 [2023-12-19 19:52:24,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:24,269 INFO L495 AbstractCegarLoop]: Abstraction has 309 states and 387 transitions. [2023-12-19 19:52:24,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 5 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2023-12-19 19:52:24,270 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 387 transitions. [2023-12-19 19:52:24,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-12-19 19:52:24,270 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:24,270 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:24,278 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-19 19:52:24,476 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:24,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -441972072, now seen corresponding path program 3 times [2023-12-19 19:52:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:24,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902862477] [2023-12-19 19:52:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:24,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:24,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736011225] [2023-12-19 19:52:24,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:52:24,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:24,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:24,513 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:24,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-19 19:52:24,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:52:24,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:52:24,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-19 19:52:24,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 37 proven. 16 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-19 19:52:26,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902862477] [2023-12-19 19:52:26,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736011225] [2023-12-19 19:52:26,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736011225] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:52:26,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:52:26,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-12-19 19:52:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979705775] [2023-12-19 19:52:26,956 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:26,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-19 19:52:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:26,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-19 19:52:26,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:52:26,957 INFO L87 Difference]: Start difference. First operand 309 states and 387 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-19 19:52:28,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:28,220 INFO L93 Difference]: Finished difference Result 326 states and 403 transitions. [2023-12-19 19:52:28,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-12-19 19:52:28,221 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 73 [2023-12-19 19:52:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:28,224 INFO L225 Difference]: With dead ends: 326 [2023-12-19 19:52:28,224 INFO L226 Difference]: Without dead ends: 322 [2023-12-19 19:52:28,224 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2023-12-19 19:52:28,224 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 55 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:28,225 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 241 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-19 19:52:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-12-19 19:52:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 319. [2023-12-19 19:52:28,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 213 states have (on average 1.1830985915492958) internal successors, (252), 221 states have internal predecessors, (252), 73 states have call successors, (73), 33 states have call predecessors, (73), 32 states have return successors, (69), 64 states have call predecessors, (69), 69 states have call successors, (69) [2023-12-19 19:52:28,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 394 transitions. [2023-12-19 19:52:28,253 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 394 transitions. Word has length 73 [2023-12-19 19:52:28,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:28,275 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 394 transitions. [2023-12-19 19:52:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 5 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2023-12-19 19:52:28,275 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 394 transitions. [2023-12-19 19:52:28,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-12-19 19:52:28,276 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:28,276 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:28,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:28,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:28,484 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:28,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 2054740817, now seen corresponding path program 1 times [2023-12-19 19:52:28,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842878175] [2023-12-19 19:52:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:28,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:28,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869639452] [2023-12-19 19:52:28,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:28,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:28,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:28,492 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:28,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-19 19:52:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:28,542 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 41 conjunts are in the unsatisfiable core [2023-12-19 19:52:28,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:28,960 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-12-19 19:52:28,960 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 10 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-19 19:52:29,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:29,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842878175] [2023-12-19 19:52:29,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:29,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869639452] [2023-12-19 19:52:29,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869639452] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:29,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:29,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-12-19 19:52:29,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447107751] [2023-12-19 19:52:29,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:29,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 19:52:29,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:29,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 19:52:29,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:52:29,494 INFO L87 Difference]: Start difference. First operand 319 states and 394 transitions. Second operand has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-12-19 19:52:36,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:36,084 INFO L93 Difference]: Finished difference Result 453 states and 600 transitions. [2023-12-19 19:52:36,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 19:52:36,084 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 79 [2023-12-19 19:52:36,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:36,086 INFO L225 Difference]: With dead ends: 453 [2023-12-19 19:52:36,086 INFO L226 Difference]: Without dead ends: 442 [2023-12-19 19:52:36,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=375, Invalid=1605, Unknown=0, NotChecked=0, Total=1980 [2023-12-19 19:52:36,087 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 149 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:36,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 666 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-12-19 19:52:36,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2023-12-19 19:52:36,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 409. [2023-12-19 19:52:36,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 271 states have (on average 1.2324723247232472) internal successors, (334), 280 states have internal predecessors, (334), 103 states have call successors, (103), 34 states have call predecessors, (103), 34 states have return successors, (101), 94 states have call predecessors, (101), 101 states have call successors, (101) [2023-12-19 19:52:36,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 538 transitions. [2023-12-19 19:52:36,146 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 538 transitions. Word has length 79 [2023-12-19 19:52:36,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:36,146 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 538 transitions. [2023-12-19 19:52:36,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2023-12-19 19:52:36,147 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 538 transitions. [2023-12-19 19:52:36,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-12-19 19:52:36,147 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:36,147 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:36,152 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:36,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-19 19:52:36,352 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:36,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:36,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1545591774, now seen corresponding path program 4 times [2023-12-19 19:52:36,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:36,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713538031] [2023-12-19 19:52:36,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:36,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:36,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1932022188] [2023-12-19 19:52:36,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:52:36,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:36,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:36,362 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:36,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-19 19:52:36,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:52:36,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:52:36,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-19 19:52:36,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:36,450 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2023-12-19 19:52:36,450 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-19 19:52:36,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713538031] [2023-12-19 19:52:36,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:36,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932022188] [2023-12-19 19:52:36,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932022188] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-19 19:52:36,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-19 19:52:36,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-19 19:52:36,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886642658] [2023-12-19 19:52:36,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-19 19:52:36,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-19 19:52:36,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:36,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-19 19:52:36,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-19 19:52:36,452 INFO L87 Difference]: Start difference. First operand 409 states and 538 transitions. Second operand has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-19 19:52:36,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:52:36,568 INFO L93 Difference]: Finished difference Result 622 states and 881 transitions. [2023-12-19 19:52:36,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-19 19:52:36,568 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 95 [2023-12-19 19:52:36,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:52:36,572 INFO L225 Difference]: With dead ends: 622 [2023-12-19 19:52:36,572 INFO L226 Difference]: Without dead ends: 447 [2023-12-19 19:52:36,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-19 19:52:36,573 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 13 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:52:36,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 177 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-19 19:52:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-12-19 19:52:36,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 404. [2023-12-19 19:52:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 264 states have (on average 1.231060606060606) internal successors, (325), 270 states have internal predecessors, (325), 105 states have call successors, (105), 34 states have call predecessors, (105), 34 states have return successors, (103), 99 states have call predecessors, (103), 103 states have call successors, (103) [2023-12-19 19:52:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 533 transitions. [2023-12-19 19:52:36,650 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 533 transitions. Word has length 95 [2023-12-19 19:52:36,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:52:36,650 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 533 transitions. [2023-12-19 19:52:36,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.4) internal successors, (32), 5 states have internal predecessors, (32), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-12-19 19:52:36,651 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 533 transitions. [2023-12-19 19:52:36,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-12-19 19:52:36,652 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:52:36,652 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:52:36,680 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-12-19 19:52:36,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-19 19:52:36,863 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:52:36,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:52:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1858222944, now seen corresponding path program 1 times [2023-12-19 19:52:36,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:52:36,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405578545] [2023-12-19 19:52:36,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:36,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:52:36,868 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:52:36,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057178797] [2023-12-19 19:52:36,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:52:36,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:52:36,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:52:36,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:52:36,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-19 19:52:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:52:36,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 48 conjunts are in the unsatisfiable core [2023-12-19 19:52:36,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:52:37,656 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 32 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2023-12-19 19:52:37,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:52:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 51 proven. 23 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2023-12-19 19:52:38,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:52:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405578545] [2023-12-19 19:52:38,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:52:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057178797] [2023-12-19 19:52:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057178797] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:52:38,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:52:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-12-19 19:52:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403852524] [2023-12-19 19:52:38,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:52:38,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-12-19 19:52:38,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:52:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-12-19 19:52:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-12-19 19:52:38,653 INFO L87 Difference]: Start difference. First operand 404 states and 533 transitions. Second operand has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-12-19 19:52:44,402 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:52:56,759 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:52:59,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-19 19:53:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:53:05,445 INFO L93 Difference]: Finished difference Result 493 states and 667 transitions. [2023-12-19 19:53:05,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-12-19 19:53:05,445 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) Word has length 96 [2023-12-19 19:53:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:53:05,448 INFO L225 Difference]: With dead ends: 493 [2023-12-19 19:53:05,448 INFO L226 Difference]: Without dead ends: 491 [2023-12-19 19:53:05,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=356, Invalid=1284, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 19:53:05,449 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 144 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 98 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 460 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:53:05,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 460 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 453 Invalid, 1 Unknown, 0 Unchecked, 12.2s Time] [2023-12-19 19:53:05,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2023-12-19 19:53:05,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 467. [2023-12-19 19:53:05,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 304 states have (on average 1.2532894736842106) internal successors, (381), 311 states have internal predecessors, (381), 127 states have call successors, (127), 35 states have call predecessors, (127), 35 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2023-12-19 19:53:05,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 633 transitions. [2023-12-19 19:53:05,578 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 633 transitions. Word has length 96 [2023-12-19 19:53:05,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:53:05,578 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 633 transitions. [2023-12-19 19:53:05,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.4761904761904763) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (31), 3 states have call predecessors, (31), 3 states have return successors, (30), 11 states have call predecessors, (30), 10 states have call successors, (30) [2023-12-19 19:53:05,578 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 633 transitions. [2023-12-19 19:53:05,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-12-19 19:53:05,579 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:53:05,579 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:53:05,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-19 19:53:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-19 19:53:05,784 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:53:05,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:53:05,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1981200126, now seen corresponding path program 1 times [2023-12-19 19:53:05,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:53:05,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631583718] [2023-12-19 19:53:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:53:05,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:53:05,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410721733] [2023-12-19 19:53:05,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:05,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:05,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:53:05,802 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:53:05,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-19 19:53:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:53:05,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 19:53:05,877 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:53:05,977 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 229 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2023-12-19 19:53:05,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:53:06,086 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 32 proven. 37 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2023-12-19 19:53:06,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:53:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631583718] [2023-12-19 19:53:06,086 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:53:06,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410721733] [2023-12-19 19:53:06,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410721733] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:53:06,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:53:06,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-12-19 19:53:06,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662849546] [2023-12-19 19:53:06,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:53:06,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 19:53:06,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:53:06,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 19:53:06,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-12-19 19:53:06,088 INFO L87 Difference]: Start difference. First operand 467 states and 633 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-12-19 19:53:06,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:53:06,799 INFO L93 Difference]: Finished difference Result 1594 states and 2212 transitions. [2023-12-19 19:53:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 19:53:06,800 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 111 [2023-12-19 19:53:06,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:53:06,804 INFO L225 Difference]: With dead ends: 1594 [2023-12-19 19:53:06,804 INFO L226 Difference]: Without dead ends: 1390 [2023-12-19 19:53:06,805 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2023-12-19 19:53:06,805 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 228 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:53:06,805 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 297 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:53:06,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2023-12-19 19:53:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1334. [2023-12-19 19:53:07,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 836 states have (on average 1.1973684210526316) internal successors, (1001), 855 states have internal predecessors, (1001), 382 states have call successors, (382), 115 states have call predecessors, (382), 115 states have return successors, (373), 363 states have call predecessors, (373), 373 states have call successors, (373) [2023-12-19 19:53:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 1756 transitions. [2023-12-19 19:53:07,226 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 1756 transitions. Word has length 111 [2023-12-19 19:53:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:53:07,226 INFO L495 AbstractCegarLoop]: Abstraction has 1334 states and 1756 transitions. [2023-12-19 19:53:07,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 9 states have call successors, (33), 6 states have call predecessors, (33), 5 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2023-12-19 19:53:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 1756 transitions. [2023-12-19 19:53:07,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-12-19 19:53:07,227 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:53:07,227 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:53:07,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-12-19 19:53:07,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-19 19:53:07,432 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:53:07,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:53:07,433 INFO L85 PathProgramCache]: Analyzing trace with hash -20875000, now seen corresponding path program 2 times [2023-12-19 19:53:07,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:53:07,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541399823] [2023-12-19 19:53:07,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:07,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:53:07,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:53:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158647869] [2023-12-19 19:53:07,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:53:07,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:53:07,462 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:53:07,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-19 19:53:07,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:53:07,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:53:07,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-19 19:53:07,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:53:08,064 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2023-12-19 19:53:08,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:53:08,778 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2023-12-19 19:53:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:53:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541399823] [2023-12-19 19:53:08,779 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:53:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158647869] [2023-12-19 19:53:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158647869] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:53:08,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:53:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-12-19 19:53:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541999173] [2023-12-19 19:53:08,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:53:08,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 19:53:08,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:53:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 19:53:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-12-19 19:53:08,780 INFO L87 Difference]: Start difference. First operand 1334 states and 1756 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-12-19 19:53:23,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:53:23,459 INFO L93 Difference]: Finished difference Result 1902 states and 2569 transitions. [2023-12-19 19:53:23,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-12-19 19:53:23,460 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) Word has length 114 [2023-12-19 19:53:23,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:53:23,465 INFO L225 Difference]: With dead ends: 1902 [2023-12-19 19:53:23,465 INFO L226 Difference]: Without dead ends: 1900 [2023-12-19 19:53:23,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=645, Invalid=2547, Unknown=0, NotChecked=0, Total=3192 [2023-12-19 19:53:23,467 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 173 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:53:23,467 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 816 Invalid, 782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-12-19 19:53:23,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1900 states. [2023-12-19 19:53:24,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1900 to 1787. [2023-12-19 19:53:24,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1787 states, 1106 states have (on average 1.2115732368896925) internal successors, (1340), 1125 states have internal predecessors, (1340), 538 states have call successors, (538), 142 states have call predecessors, (538), 142 states have return successors, (529), 519 states have call predecessors, (529), 529 states have call successors, (529) [2023-12-19 19:53:24,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2407 transitions. [2023-12-19 19:53:24,151 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2407 transitions. Word has length 114 [2023-12-19 19:53:24,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:53:24,151 INFO L495 AbstractCegarLoop]: Abstraction has 1787 states and 2407 transitions. [2023-12-19 19:53:24,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 18 states have internal predecessors, (53), 11 states have call successors, (36), 3 states have call predecessors, (36), 2 states have return successors, (35), 12 states have call predecessors, (35), 11 states have call successors, (35) [2023-12-19 19:53:24,152 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2407 transitions. [2023-12-19 19:53:24,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-12-19 19:53:24,153 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:53:24,153 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:53:24,157 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-19 19:53:24,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:24,358 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:53:24,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:53:24,358 INFO L85 PathProgramCache]: Analyzing trace with hash 493843562, now seen corresponding path program 3 times [2023-12-19 19:53:24,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:53:24,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998975604] [2023-12-19 19:53:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:24,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:53:24,364 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:53:24,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [453503837] [2023-12-19 19:53:24,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:53:24,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:24,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:53:24,365 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:53:24,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-19 19:53:24,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-19 19:53:24,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:53:24,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-19 19:53:24,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:53:25,118 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 75 proven. 47 refuted. 0 times theorem prover too weak. 340 trivial. 0 not checked. [2023-12-19 19:53:25,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:53:26,138 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 70 proven. 43 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2023-12-19 19:53:26,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:53:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998975604] [2023-12-19 19:53:26,139 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:53:26,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453503837] [2023-12-19 19:53:26,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453503837] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:53:26,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:53:26,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2023-12-19 19:53:26,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027706699] [2023-12-19 19:53:26,139 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:53:26,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 19:53:26,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:53:26,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 19:53:26,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:53:26,141 INFO L87 Difference]: Start difference. First operand 1787 states and 2407 transitions. Second operand has 28 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2023-12-19 19:53:31,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:53:31,692 INFO L93 Difference]: Finished difference Result 2256 states and 3035 transitions. [2023-12-19 19:53:31,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-12-19 19:53:31,693 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) Word has length 118 [2023-12-19 19:53:31,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:53:31,700 INFO L225 Difference]: With dead ends: 2256 [2023-12-19 19:53:31,700 INFO L226 Difference]: Without dead ends: 2252 [2023-12-19 19:53:31,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=642, Invalid=2550, Unknown=0, NotChecked=0, Total=3192 [2023-12-19 19:53:31,701 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 190 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 643 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-12-19 19:53:31,701 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 643 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-12-19 19:53:31,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2252 states. [2023-12-19 19:53:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2252 to 2103. [2023-12-19 19:53:32,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2103 states, 1318 states have (on average 1.2154779969650986) internal successors, (1602), 1341 states have internal predecessors, (1602), 610 states have call successors, (610), 175 states have call predecessors, (610), 174 states have return successors, (601), 586 states have call predecessors, (601), 601 states have call successors, (601) [2023-12-19 19:53:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2103 states to 2103 states and 2813 transitions. [2023-12-19 19:53:32,584 INFO L78 Accepts]: Start accepts. Automaton has 2103 states and 2813 transitions. Word has length 118 [2023-12-19 19:53:32,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:53:32,584 INFO L495 AbstractCegarLoop]: Abstraction has 2103 states and 2813 transitions. [2023-12-19 19:53:32,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 13 states have call successors, (36), 3 states have call predecessors, (36), 3 states have return successors, (34), 13 states have call predecessors, (34), 11 states have call successors, (34) [2023-12-19 19:53:32,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2103 states and 2813 transitions. [2023-12-19 19:53:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-19 19:53:32,586 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:53:32,586 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:53:32,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-12-19 19:53:32,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:32,791 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:53:32,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:53:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1122492623, now seen corresponding path program 1 times [2023-12-19 19:53:32,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:53:32,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093137082] [2023-12-19 19:53:32,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:32,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:53:32,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:53:32,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [232980482] [2023-12-19 19:53:32,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:32,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:32,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:53:32,821 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:53:32,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-19 19:53:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-19 19:53:32,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-19 19:53:32,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:53:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 434 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-19 19:53:33,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:53:33,196 INFO L134 CoverageAnalysis]: Checked inductivity of 586 backedges. 32 proven. 50 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-12-19 19:53:33,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:53:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093137082] [2023-12-19 19:53:33,196 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:53:33,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232980482] [2023-12-19 19:53:33,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232980482] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:53:33,196 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:53:33,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-12-19 19:53:33,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615784144] [2023-12-19 19:53:33,196 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:53:33,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-19 19:53:33,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:53:33,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-19 19:53:33,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2023-12-19 19:53:33,197 INFO L87 Difference]: Start difference. First operand 2103 states and 2813 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-19 19:53:34,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:53:34,261 INFO L93 Difference]: Finished difference Result 2181 states and 2891 transitions. [2023-12-19 19:53:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-12-19 19:53:34,262 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 128 [2023-12-19 19:53:34,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:53:34,268 INFO L225 Difference]: With dead ends: 2181 [2023-12-19 19:53:34,268 INFO L226 Difference]: Without dead ends: 2141 [2023-12-19 19:53:34,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=558, Unknown=0, NotChecked=0, Total=870 [2023-12-19 19:53:34,269 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 168 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-19 19:53:34,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 283 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-19 19:53:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2141 states. [2023-12-19 19:53:35,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2141 to 2127. [2023-12-19 19:53:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 1342 states have (on average 1.1818181818181819) internal successors, (1586), 1365 states have internal predecessors, (1586), 610 states have call successors, (610), 175 states have call predecessors, (610), 174 states have return successors, (601), 586 states have call predecessors, (601), 601 states have call successors, (601) [2023-12-19 19:53:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 2797 transitions. [2023-12-19 19:53:35,188 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 2797 transitions. Word has length 128 [2023-12-19 19:53:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:53:35,188 INFO L495 AbstractCegarLoop]: Abstraction has 2127 states and 2797 transitions. [2023-12-19 19:53:35,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 18 states have internal predecessors, (72), 11 states have call successors, (41), 7 states have call predecessors, (41), 6 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2023-12-19 19:53:35,188 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 2797 transitions. [2023-12-19 19:53:35,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-12-19 19:53:35,190 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:53:35,190 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:53:35,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-12-19 19:53:35,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:35,395 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:53:35,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:53:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -444119633, now seen corresponding path program 2 times [2023-12-19 19:53:35,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:53:35,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999941973] [2023-12-19 19:53:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:53:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:53:35,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:53:35,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386047575] [2023-12-19 19:53:35,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-19 19:53:35,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:53:35,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:53:35,408 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:53:35,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-19 19:53:35,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-19 19:53:35,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:53:35,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-19 19:53:35,493 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:53:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 35 proven. 58 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2023-12-19 19:53:36,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:53:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2023-12-19 19:53:37,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:53:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999941973] [2023-12-19 19:53:37,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:53:37,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386047575] [2023-12-19 19:53:37,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386047575] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:53:37,956 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:53:37,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-12-19 19:53:37,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169464515] [2023-12-19 19:53:37,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:53:37,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-19 19:53:37,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:53:37,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-19 19:53:37,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-12-19 19:53:37,957 INFO L87 Difference]: Start difference. First operand 2127 states and 2797 transitions. Second operand has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-19 19:54:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:12,641 INFO L93 Difference]: Finished difference Result 2577 states and 3451 transitions. [2023-12-19 19:54:12,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-12-19 19:54:12,642 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 129 [2023-12-19 19:54:12,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:12,671 INFO L225 Difference]: With dead ends: 2577 [2023-12-19 19:54:12,672 INFO L226 Difference]: Without dead ends: 2542 [2023-12-19 19:54:12,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2009 ImplicationChecksByTransitivity, 27.8s TimeCoverageRelationStatistics Valid=1270, Invalid=5702, Unknown=0, NotChecked=0, Total=6972 [2023-12-19 19:54:12,674 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 345 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 882 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 1254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:12,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1192 Invalid, 1254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 882 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-12-19 19:54:12,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2023-12-19 19:54:13,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 2337. [2023-12-19 19:54:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2337 states, 1469 states have (on average 1.1872021783526208) internal successors, (1744), 1491 states have internal predecessors, (1744), 678 states have call successors, (678), 190 states have call predecessors, (678), 189 states have return successors, (669), 655 states have call predecessors, (669), 669 states have call successors, (669) [2023-12-19 19:54:13,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2337 states to 2337 states and 3091 transitions. [2023-12-19 19:54:13,828 INFO L78 Accepts]: Start accepts. Automaton has 2337 states and 3091 transitions. Word has length 129 [2023-12-19 19:54:13,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:13,829 INFO L495 AbstractCegarLoop]: Abstraction has 2337 states and 3091 transitions. [2023-12-19 19:54:13,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.423076923076923) internal successors, (63), 25 states have internal predecessors, (63), 13 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-19 19:54:13,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2337 states and 3091 transitions. [2023-12-19 19:54:13,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-19 19:54:13,830 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:13,830 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:13,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:14,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:14,035 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:14,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:14,035 INFO L85 PathProgramCache]: Analyzing trace with hash 2032247298, now seen corresponding path program 4 times [2023-12-19 19:54:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:14,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504269255] [2023-12-19 19:54:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:14,041 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:14,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2007762919] [2023-12-19 19:54:14,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:54:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:14,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:14,042 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:54:14,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-19 19:54:14,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:54:14,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:14,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 78 conjunts are in the unsatisfiable core [2023-12-19 19:54:14,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 822 backedges. 167 proven. 100 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2023-12-19 19:54:16,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:24,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:24,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504269255] [2023-12-19 19:54:24,680 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:24,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007762919] [2023-12-19 19:54:24,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2007762919] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:24,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:24,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-12-19 19:54:24,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713360757] [2023-12-19 19:54:24,680 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:24,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-12-19 19:54:24,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:24,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-12-19 19:54:24,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2023-12-19 19:54:24,681 INFO L87 Difference]: Start difference. First operand 2337 states and 3091 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-19 19:54:31,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:31,498 INFO L93 Difference]: Finished difference Result 2379 states and 3126 transitions. [2023-12-19 19:54:31,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 19:54:31,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) Word has length 146 [2023-12-19 19:54:31,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:31,505 INFO L225 Difference]: With dead ends: 2379 [2023-12-19 19:54:31,505 INFO L226 Difference]: Without dead ends: 2375 [2023-12-19 19:54:31,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=260, Invalid=1221, Unknown=1, NotChecked=0, Total=1482 [2023-12-19 19:54:31,507 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 59 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:31,507 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 689 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 19:54:31,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2375 states. [2023-12-19 19:54:32,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2375 to 2360. [2023-12-19 19:54:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2360 states, 1487 states have (on average 1.1842636180228647) internal successors, (1761), 1508 states have internal predecessors, (1761), 677 states have call successors, (677), 196 states have call predecessors, (677), 195 states have return successors, (669), 655 states have call predecessors, (669), 669 states have call successors, (669) [2023-12-19 19:54:32,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2360 states to 2360 states and 3107 transitions. [2023-12-19 19:54:32,702 INFO L78 Accepts]: Start accepts. Automaton has 2360 states and 3107 transitions. Word has length 146 [2023-12-19 19:54:32,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:32,702 INFO L495 AbstractCegarLoop]: Abstraction has 2360 states and 3107 transitions. [2023-12-19 19:54:32,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 17 states have internal predecessors, (42), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 9 states have call successors, (23) [2023-12-19 19:54:32,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2360 states and 3107 transitions. [2023-12-19 19:54:32,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2023-12-19 19:54:32,704 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:32,704 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:32,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-19 19:54:32,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:32,904 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:32,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:32,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1829836889, now seen corresponding path program 3 times [2023-12-19 19:54:32,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:32,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079408804] [2023-12-19 19:54:32,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:32,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:32,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:32,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020593773] [2023-12-19 19:54:32,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-19 19:54:32,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:32,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:32,922 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:54:32,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-19 19:54:33,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-19 19:54:33,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:33,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 38 conjunts are in the unsatisfiable core [2023-12-19 19:54:33,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 897 backedges. 93 proven. 32 refuted. 0 times theorem prover too weak. 772 trivial. 0 not checked. [2023-12-19 19:54:33,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:37,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:37,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079408804] [2023-12-19 19:54:37,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:37,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020593773] [2023-12-19 19:54:37,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020593773] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:37,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:37,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-12-19 19:54:37,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070786414] [2023-12-19 19:54:37,717 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:37,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-19 19:54:37,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-19 19:54:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=293, Unknown=1, NotChecked=0, Total=342 [2023-12-19 19:54:37,718 INFO L87 Difference]: Start difference. First operand 2360 states and 3107 transitions. Second operand has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:39,190 INFO L93 Difference]: Finished difference Result 2510 states and 3296 transitions. [2023-12-19 19:54:39,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-19 19:54:39,190 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 148 [2023-12-19 19:54:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:39,198 INFO L225 Difference]: With dead ends: 2510 [2023-12-19 19:54:39,198 INFO L226 Difference]: Without dead ends: 2475 [2023-12-19 19:54:39,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=81, Invalid=470, Unknown=1, NotChecked=0, Total=552 [2023-12-19 19:54:39,199 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 27 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:39,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 269 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-19 19:54:39,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2475 states. [2023-12-19 19:54:40,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2475 to 2448. [2023-12-19 19:54:40,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2448 states, 1534 states have (on average 1.1792698826597132) internal successors, (1809), 1555 states have internal predecessors, (1809), 712 states have call successors, (712), 201 states have call predecessors, (712), 201 states have return successors, (705), 691 states have call predecessors, (705), 705 states have call successors, (705) [2023-12-19 19:54:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2448 states to 2448 states and 3226 transitions. [2023-12-19 19:54:40,440 INFO L78 Accepts]: Start accepts. Automaton has 2448 states and 3226 transitions. Word has length 148 [2023-12-19 19:54:40,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:40,441 INFO L495 AbstractCegarLoop]: Abstraction has 2448 states and 3226 transitions. [2023-12-19 19:54:40,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-19 19:54:40,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2448 states and 3226 transitions. [2023-12-19 19:54:40,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-12-19 19:54:40,443 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:40,443 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:40,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-12-19 19:54:40,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:40,648 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:40,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:40,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1771009526, now seen corresponding path program 5 times [2023-12-19 19:54:40,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:40,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007938177] [2023-12-19 19:54:40,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:40,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:40,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:40,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1763071658] [2023-12-19 19:54:40,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 19:54:40,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:40,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:40,656 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:54:40,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-19 19:54:41,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 19:54:41,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:41,161 INFO L262 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 71 conjunts are in the unsatisfiable core [2023-12-19 19:54:41,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:54:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1192 backedges. 145 proven. 200 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2023-12-19 19:54:42,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:54:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:54:42,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007938177] [2023-12-19 19:54:42,878 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:54:42,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763071658] [2023-12-19 19:54:42,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763071658] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:54:42,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:54:42,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-12-19 19:54:42,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082593823] [2023-12-19 19:54:42,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:54:42,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-19 19:54:42,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:54:42,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-19 19:54:42,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:54:42,879 INFO L87 Difference]: Start difference. First operand 2448 states and 3226 transitions. Second operand has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:54:45,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:54:45,343 INFO L93 Difference]: Finished difference Result 2528 states and 3311 transitions. [2023-12-19 19:54:45,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-19 19:54:45,343 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) Word has length 169 [2023-12-19 19:54:45,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:54:45,350 INFO L225 Difference]: With dead ends: 2528 [2023-12-19 19:54:45,350 INFO L226 Difference]: Without dead ends: 2524 [2023-12-19 19:54:45,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2023-12-19 19:54:45,351 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 65 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 1016 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 993 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-12-19 19:54:45,351 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 993 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1016 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-12-19 19:54:45,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2524 states. [2023-12-19 19:54:46,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2524 to 2466. [2023-12-19 19:54:46,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2466 states, 1548 states have (on average 1.177002583979328) internal successors, (1822), 1568 states have internal predecessors, (1822), 712 states have call successors, (712), 206 states have call predecessors, (712), 205 states have return successors, (705), 691 states have call predecessors, (705), 705 states have call successors, (705) [2023-12-19 19:54:46,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2466 states to 2466 states and 3239 transitions. [2023-12-19 19:54:46,565 INFO L78 Accepts]: Start accepts. Automaton has 2466 states and 3239 transitions. Word has length 169 [2023-12-19 19:54:46,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:54:46,565 INFO L495 AbstractCegarLoop]: Abstraction has 2466 states and 3239 transitions. [2023-12-19 19:54:46,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 10 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (27), 10 states have call predecessors, (27), 9 states have call successors, (27) [2023-12-19 19:54:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2466 states and 3239 transitions. [2023-12-19 19:54:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-12-19 19:54:46,567 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:54:46,567 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:54:46,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-12-19 19:54:46,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-12-19 19:54:46,774 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:54:46,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:54:46,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1835800364, now seen corresponding path program 6 times [2023-12-19 19:54:46,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:54:46,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18802488] [2023-12-19 19:54:46,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:54:46,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:54:46,781 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:54:46,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690930609] [2023-12-19 19:54:46,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-19 19:54:46,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:54:46,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:54:46,782 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:54:46,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-19 19:54:50,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-12-19 19:54:50,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:54:50,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 55 conjunts are in the unsatisfiable core [2023-12-19 19:54:50,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1203 backedges. 226 proven. 55 refuted. 0 times theorem prover too weak. 922 trivial. 0 not checked. [2023-12-19 19:55:13,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:15,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18802488] [2023-12-19 19:55:15,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:15,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690930609] [2023-12-19 19:55:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690930609] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-19 19:55:15,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-19 19:55:15,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-12-19 19:55:15,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546356913] [2023-12-19 19:55:15,225 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:15,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-19 19:55:15,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:15,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-19 19:55:15,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2023-12-19 19:55:15,226 INFO L87 Difference]: Start difference. First operand 2466 states and 3239 transitions. Second operand has 19 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2023-12-19 19:55:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:55:24,890 INFO L93 Difference]: Finished difference Result 2909 states and 3845 transitions. [2023-12-19 19:55:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-12-19 19:55:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 173 [2023-12-19 19:55:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:55:24,898 INFO L225 Difference]: With dead ends: 2909 [2023-12-19 19:55:24,899 INFO L226 Difference]: Without dead ends: 2900 [2023-12-19 19:55:24,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=318, Invalid=1322, Unknown=0, NotChecked=0, Total=1640 [2023-12-19 19:55:24,900 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 67 mSDsluCounter, 493 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-12-19 19:55:24,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 549 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 611 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-12-19 19:55:24,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2023-12-19 19:55:26,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2800. [2023-12-19 19:55:26,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 1752 states have (on average 1.1803652968036529) internal successors, (2068), 1773 states have internal predecessors, (2068), 812 states have call successors, (812), 236 states have call predecessors, (812), 235 states have return successors, (805), 790 states have call predecessors, (805), 805 states have call successors, (805) [2023-12-19 19:55:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 3685 transitions. [2023-12-19 19:55:26,343 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 3685 transitions. Word has length 173 [2023-12-19 19:55:26,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:55:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 2800 states and 3685 transitions. [2023-12-19 19:55:26,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2023-12-19 19:55:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 3685 transitions. [2023-12-19 19:55:26,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-19 19:55:26,345 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:55:26,346 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:55:26,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-19 19:55:26,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-12-19 19:55:26,552 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:55:26,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:55:26,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1964773325, now seen corresponding path program 4 times [2023-12-19 19:55:26,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:55:26,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805833749] [2023-12-19 19:55:26,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:55:26,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:55:26,558 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:55:26,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203130726] [2023-12-19 19:55:26,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-19 19:55:26,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:55:26,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:55:26,559 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:55:26,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-19 19:55:26,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-19 19:55:26,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:55:26,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 69 conjunts are in the unsatisfiable core [2023-12-19 19:55:26,657 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:55:27,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 124 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2023-12-19 19:55:27,614 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:55:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-12-19 19:55:32,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:55:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805833749] [2023-12-19 19:55:32,973 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:55:32,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203130726] [2023-12-19 19:55:32,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203130726] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:55:32,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:55:32,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-12-19 19:55:32,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213248354] [2023-12-19 19:55:32,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:55:32,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-19 19:55:32,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:55:32,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-19 19:55:32,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-12-19 19:55:32,975 INFO L87 Difference]: Start difference. First operand 2800 states and 3685 transitions. Second operand has 31 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2023-12-19 19:56:27,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:56:27,954 INFO L93 Difference]: Finished difference Result 3165 states and 4187 transitions. [2023-12-19 19:56:27,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2023-12-19 19:56:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) Word has length 175 [2023-12-19 19:56:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:56:27,966 INFO L225 Difference]: With dead ends: 3165 [2023-12-19 19:56:27,966 INFO L226 Difference]: Without dead ends: 3139 [2023-12-19 19:56:27,968 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 45.5s TimeCoverageRelationStatistics Valid=1433, Invalid=6399, Unknown=0, NotChecked=0, Total=7832 [2023-12-19 19:56:27,968 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 364 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1585 SdHoareTripleChecker+Invalid, 1771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2023-12-19 19:56:27,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1585 Invalid, 1771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2023-12-19 19:56:27,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3139 states. [2023-12-19 19:56:29,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3139 to 3004. [2023-12-19 19:56:29,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 1880 states have (on average 1.172340425531915) internal successors, (2204), 1901 states have internal predecessors, (2204), 872 states have call successors, (872), 252 states have call predecessors, (872), 251 states have return successors, (865), 850 states have call predecessors, (865), 865 states have call successors, (865) [2023-12-19 19:56:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 3941 transitions. [2023-12-19 19:56:29,691 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 3941 transitions. Word has length 175 [2023-12-19 19:56:29,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:56:29,692 INFO L495 AbstractCegarLoop]: Abstraction has 3004 states and 3941 transitions. [2023-12-19 19:56:29,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.586206896551724) internal successors, (75), 28 states have internal predecessors, (75), 18 states have call successors, (57), 3 states have call predecessors, (57), 2 states have return successors, (56), 16 states have call predecessors, (56), 16 states have call successors, (56) [2023-12-19 19:56:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 3941 transitions. [2023-12-19 19:56:29,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-12-19 19:56:29,693 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:56:29,694 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:56:29,700 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-19 19:56:29,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-12-19 19:56:29,899 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:56:29,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:56:29,899 INFO L85 PathProgramCache]: Analyzing trace with hash -1867416401, now seen corresponding path program 5 times [2023-12-19 19:56:29,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:56:29,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113751312] [2023-12-19 19:56:29,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:56:29,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:56:29,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:56:29,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [462442264] [2023-12-19 19:56:29,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-19 19:56:29,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:56:29,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:56:29,906 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:56:29,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-19 19:56:30,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-19 19:56:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-19 19:56:30,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 68 conjunts are in the unsatisfiable core [2023-12-19 19:56:30,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-19 19:56:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-12-19 19:56:31,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-19 19:56:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 48 proven. 115 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2023-12-19 19:56:40,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-19 19:56:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113751312] [2023-12-19 19:56:40,808 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-19 19:56:40,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462442264] [2023-12-19 19:56:40,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462442264] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-19 19:56:40,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-19 19:56:40,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-12-19 19:56:40,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490046331] [2023-12-19 19:56:40,808 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-19 19:56:40,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-12-19 19:56:40,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-19 19:56:40,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-12-19 19:56:40,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2023-12-19 19:56:40,810 INFO L87 Difference]: Start difference. First operand 3004 states and 3941 transitions. Second operand has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2023-12-19 19:57:19,151 WARN L293 SmtUtils]: Spent 6.48s on a formula simplification. DAG size of input: 86 DAG size of output: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:57:30,382 WARN L293 SmtUtils]: Spent 5.54s on a formula simplification. DAG size of input: 97 DAG size of output: 101 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-19 19:57:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-19 19:57:33,714 INFO L93 Difference]: Finished difference Result 3365 states and 4427 transitions. [2023-12-19 19:57:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-19 19:57:33,715 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) Word has length 175 [2023-12-19 19:57:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-19 19:57:33,723 INFO L225 Difference]: With dead ends: 3365 [2023-12-19 19:57:33,723 INFO L226 Difference]: Without dead ends: 3335 [2023-12-19 19:57:33,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 321 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 43.6s TimeCoverageRelationStatistics Valid=1095, Invalid=4605, Unknown=0, NotChecked=0, Total=5700 [2023-12-19 19:57:33,725 INFO L413 NwaCegarLoop]: 107 mSDtfsCounter, 224 mSDsluCounter, 1476 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 1583 SdHoareTripleChecker+Invalid, 1518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.8s IncrementalHoareTripleChecker+Time [2023-12-19 19:57:33,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 1583 Invalid, 1518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 13.8s Time] [2023-12-19 19:57:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3335 states. [2023-12-19 19:57:35,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3335 to 3185. [2023-12-19 19:57:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 1991 states have (on average 1.167754897036665) internal successors, (2325), 2010 states have internal predecessors, (2325), 923 states have call successors, (923), 270 states have call predecessors, (923), 270 states have return successors, (918), 904 states have call predecessors, (918), 918 states have call successors, (918) [2023-12-19 19:57:35,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 4166 transitions. [2023-12-19 19:57:35,726 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 4166 transitions. Word has length 175 [2023-12-19 19:57:35,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-19 19:57:35,726 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 4166 transitions. [2023-12-19 19:57:35,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 27 states have internal predecessors, (72), 17 states have call successors, (56), 3 states have call predecessors, (56), 1 states have return successors, (54), 15 states have call predecessors, (54), 15 states have call successors, (54) [2023-12-19 19:57:35,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 4166 transitions. [2023-12-19 19:57:35,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2023-12-19 19:57:35,729 INFO L187 NwaCegarLoop]: Found error trace [2023-12-19 19:57:35,729 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:57:35,734 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-12-19 19:57:35,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-12-19 19:57:35,934 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-19 19:57:35,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-19 19:57:35,934 INFO L85 PathProgramCache]: Analyzing trace with hash -926912638, now seen corresponding path program 7 times [2023-12-19 19:57:35,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-19 19:57:35,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83553116] [2023-12-19 19:57:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-19 19:57:35,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-19 19:57:35,940 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-19 19:57:35,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2048521128] [2023-12-19 19:57:35,941 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-19 19:57:35,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-19 19:57:35,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-19 19:57:35,942 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-19 19:57:35,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-12-19 19:57:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2023-12-19 19:57:36,040 WARN L124 FreeRefinementEngine]: Strategy CAMEL was unsuccessful and could not determine trace feasibility [2023-12-19 19:57:36,040 INFO L360 BasicCegarLoop]: Counterexample might be feasible [2023-12-19 19:57:36,045 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-19 19:57:36,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-12-19 19:57:36,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-12-19 19:57:36,249 INFO L445 BasicCegarLoop]: Path program histogram: [7, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-19 19:57:36,251 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-19 19:57:36,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.12 07:57:36 BoogieIcfgContainer [2023-12-19 19:57:36,269 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-19 19:57:36,269 INFO L158 Benchmark]: Toolchain (without parser) took 323453.03ms. Allocated memory was 359.7MB in the beginning and 747.6MB in the end (delta: 388.0MB). Free memory was 317.7MB in the beginning and 420.0MB in the end (delta: -102.3MB). Peak memory consumption was 286.7MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,269 INFO L158 Benchmark]: CDTParser took 0.36ms. Allocated memory is still 226.5MB. Free memory is still 177.8MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-19 19:57:36,270 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.31ms. Allocated memory is still 359.7MB. Free memory was 317.7MB in the beginning and 306.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,270 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.58ms. Allocated memory is still 359.7MB. Free memory was 306.2MB in the beginning and 304.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,270 INFO L158 Benchmark]: Boogie Preprocessor took 20.17ms. Allocated memory is still 359.7MB. Free memory was 304.1MB in the beginning and 302.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,270 INFO L158 Benchmark]: RCFGBuilder took 211.58ms. Allocated memory is still 359.7MB. Free memory was 302.5MB in the beginning and 288.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,270 INFO L158 Benchmark]: TraceAbstraction took 322981.40ms. Allocated memory was 359.7MB in the beginning and 747.6MB in the end (delta: 388.0MB). Free memory was 287.3MB in the beginning and 420.0MB in the end (delta: -132.7MB). Peak memory consumption was 256.3MB. Max. memory is 8.0GB. [2023-12-19 19:57:36,271 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36ms. Allocated memory is still 226.5MB. Free memory is still 177.8MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 195.31ms. Allocated memory is still 359.7MB. Free memory was 317.7MB in the beginning and 306.2MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 40.58ms. Allocated memory is still 359.7MB. Free memory was 306.2MB in the beginning and 304.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.17ms. Allocated memory is still 359.7MB. Free memory was 304.1MB in the beginning and 302.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 211.58ms. Allocated memory is still 359.7MB. Free memory was 302.5MB in the beginning and 288.4MB in the end (delta: 14.2MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * TraceAbstraction took 322981.40ms. Allocated memory was 359.7MB in the beginning and 747.6MB in the end (delta: 388.0MB). Free memory was 287.3MB in the beginning and 420.0MB in the end (delta: -132.7MB). Peak memory consumption was 256.3MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 13]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L18] int counter = 0; [L20] int x, y; [L21] long long a, b, p, q, r, s, c, k, xy, yy; [L22] x = __VERIFIER_nondet_int() [L23] y = __VERIFIER_nondet_int() [L24] CALL assume_abort_if_not(x >= 1) [L8] COND FALSE !(!cond) [L24] RET assume_abort_if_not(x >= 1) [L25] CALL assume_abort_if_not(y >= 1) [L8] COND FALSE !(!cond) [L25] RET assume_abort_if_not(y >= 1) [L27] a = x [L28] b = y [L29] p = 1 [L30] q = 0 [L31] r = 0 [L32] s = 1 [L33] c = 0 [L34] k = 0 [L35] xy = (long long) x * y [L36] yy = (long long) y * y [L37] CALL assume_abort_if_not(xy < 2147483647) [L8] COND FALSE !(!cond) [L37] RET assume_abort_if_not(xy < 2147483647) [L38] CALL assume_abort_if_not(yy < 2147483647) [L8] COND FALSE !(!cond) [L38] RET assume_abort_if_not(yy < 2147483647) [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L41] COND FALSE, EXPR !(!(b != 0)) [L43] EXPR c = a [L44] EXPR k = 0 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND TRUE, EXPR !(c >= b) [L57] EXPR a = b [L58] EXPR b = c [L60] long long temp; [L61] EXPR temp = p [L62] EXPR p = q [L63] EXPR q = temp - q * k [L64] EXPR temp = r [L65] EXPR r = s [L66] EXPR s = temp - s * k [L40-L67] { if (!(b != 0)) break; c = a; k = 0; while (counter++<20) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L41] COND FALSE, EXPR !(!(b != 0)) [L43] EXPR c = a [L44] EXPR k = 0 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND FALSE, EXPR !(!(c >= b)) [L53] EXPR c = c - b [L54] EXPR k = k + 1 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND FALSE, EXPR !(!(c >= b)) [L53] EXPR c = c - b [L54] EXPR k = k + 1 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND FALSE, EXPR !(!(c >= b)) [L53] EXPR c = c - b [L54] EXPR k = k + 1 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND FALSE, EXPR !(!(c >= b)) [L53] EXPR c = c - b [L54] EXPR k = k + 1 [L46] EXPR counter++ [L46] COND TRUE, EXPR counter++<20 [L47] CALL, EXPR __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET, EXPR __VERIFIER_assert(a == k * b + c) [L48] CALL, EXPR __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET, EXPR __VERIFIER_assert(a == y*r + x*p) [L49] CALL, EXPR __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET, EXPR __VERIFIER_assert(b == x * q + y * s) [L50] CALL, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND FALSE !(!(cond)) [L50] RET, EXPR __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L51] COND TRUE, EXPR !(c >= b) [L57] EXPR a = b [L58] EXPR b = c [L60] long long temp; [L61] EXPR temp = p [L62] EXPR p = q [L63] EXPR q = temp - q * k [L64] EXPR temp = r [L65] EXPR r = s [L66] EXPR s = temp - s * k [L40-L67] { if (!(b != 0)) break; c = a; k = 0; while (counter++<20) { __VERIFIER_assert(a == k * b + c); __VERIFIER_assert(a == y*r + x*p); __VERIFIER_assert(b == x * q + y * s); __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0); if (!(c >= b)) break; c = c - b; k = k + 1; } a = b; b = c; long long temp; temp = p; p = q; q = temp - q * k; temp = r; r = s; s = temp - s * k; } [L40] EXPR counter++ [L40] COND TRUE counter++<20 [L41] COND FALSE !(!(b != 0)) [L43] c = a [L44] k = 0 [L46] EXPR counter++ [L46] COND TRUE counter++<20 [L47] CALL __VERIFIER_assert(a == k * b + c) [L11] COND FALSE !(!(cond)) [L47] RET __VERIFIER_assert(a == k * b + c) [L48] CALL __VERIFIER_assert(a == y*r + x*p) [L11] COND FALSE !(!(cond)) [L48] RET __VERIFIER_assert(a == y*r + x*p) [L49] CALL __VERIFIER_assert(b == x * q + y * s) [L11] COND FALSE !(!(cond)) [L49] RET __VERIFIER_assert(b == x * q + y * s) [L50] CALL __VERIFIER_assert(q*xy + s*yy - q*x - b*y - s*y + b == 0) [L11] COND TRUE !(cond) [L13] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 322.9s, OverallIterations: 29, TraceHistogramMax: 28, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 221.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 2776 SdHoareTripleChecker+Valid, 59.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2637 mSDsluCounter, 12559 SdHoareTripleChecker+Invalid, 58.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11194 mSDsCounter, 1905 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 10118 IncrementalHoareTripleChecker+Invalid, 12024 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1905 mSolverCounterUnsat, 1365 mSDtfsCounter, 10118 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4477 GetRequests, 3691 SyntacticMatches, 7 SemanticMatches, 779 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8725 ImplicationChecksByTransitivity, 178.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3185occurred in iteration=28, InterpolantAutomatonStates: 585, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 13.4s AutomataMinimizationTime, 28 MinimizatonAttempts, 1208 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 5.2s SatisfiabilityAnalysisTime, 75.7s InterpolantComputationTime, 2720 NumberOfCodeBlocks, 2477 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 3950 ConstructedInterpolants, 0 QuantifiedInterpolants, 30963 SizeOfPredicates, 186 NumberOfNonLiveVariables, 5988 ConjunctsInSsa, 911 ConjunctsInUnsatCore, 45 InterpolantComputations, 7 PerfectInterpolantSequences, 14308/16406 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-12-19 19:57:36,345 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...