/usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.use.bitabs.translation false -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 06:35:08,395 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 06:35:08,466 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-12-21 06:35:08,470 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 06:35:08,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 06:35:08,492 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 06:35:08,492 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 06:35:08,492 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 06:35:08,493 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 06:35:08,496 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 06:35:08,496 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 06:35:08,496 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 06:35:08,497 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 06:35:08,498 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 06:35:08,498 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 06:35:08,498 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 06:35:08,498 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 06:35:08,498 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 06:35:08,499 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 06:35:08,499 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 06:35:08,499 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 06:35:08,499 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 06:35:08,499 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 06:35:08,500 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 06:35:08,500 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 06:35:08,500 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 06:35:08,500 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 06:35:08,500 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 06:35:08,501 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 06:35:08,501 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:35:08,502 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 06:35:08,502 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 06:35:08,503 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 06:35:08,674 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 06:35:08,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 06:35:08,694 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 06:35:08,694 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 06:35:08,695 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 06:35:08,695 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-12-21 06:35:09,729 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 06:35:09,858 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 06:35:09,859 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd3-ll_valuebound5.c [2023-12-21 06:35:09,864 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f5468f/259f595de64046ebace346da16e2bc21/FLAG84ada7dcb [2023-12-21 06:35:09,873 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/435f5468f/259f595de64046ebace346da16e2bc21 [2023-12-21 06:35:09,875 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 06:35:09,876 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 06:35:09,876 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 06:35:09,877 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 06:35:09,880 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 06:35:09,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:35:09" (1/1) ... [2023-12-21 06:35:09,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bcce88e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:09, skipping insertion in model container [2023-12-21 06:35:09,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 06:35:09" (1/1) ... [2023-12-21 06:35:09,894 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 06:35:09,987 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/egcd3-ll_valuebound5.c[490,503] [2023-12-21 06:35:10,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:35:10,025 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 06:35:10,035 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/egcd3-ll_valuebound5.c[490,503] [2023-12-21 06:35:10,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 06:35:10,060 INFO L206 MainTranslator]: Completed translation [2023-12-21 06:35:10,061 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10 WrapperNode [2023-12-21 06:35:10,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 06:35:10,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 06:35:10,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 06:35:10,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 06:35:10,066 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,073 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,095 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 83 [2023-12-21 06:35:10,095 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 06:35:10,096 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 06:35:10,096 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 06:35:10,096 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 06:35:10,103 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,111 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,125 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-12-21 06:35:10,126 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,126 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,132 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,134 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,135 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,135 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,136 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 06:35:10,137 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 06:35:10,137 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 06:35:10,137 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 06:35:10,138 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (1/1) ... [2023-12-21 06:35:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 06:35:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:10,194 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-12-21 06:35:10,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-12-21 06:35:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 06:35:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-12-21 06:35:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-12-21 06:35:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 06:35:10,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 06:35:10,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 06:35:10,237 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 06:35:10,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 06:35:10,284 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 06:35:10,285 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 06:35:10,407 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 06:35:10,424 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 06:35:10,426 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-12-21 06:35:10,427 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:35:10 BoogieIcfgContainer [2023-12-21 06:35:10,427 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 06:35:10,428 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 06:35:10,428 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 06:35:10,430 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 06:35:10,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 06:35:09" (1/3) ... [2023-12-21 06:35:10,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b39e3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:35:10, skipping insertion in model container [2023-12-21 06:35:10,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 06:35:10" (2/3) ... [2023-12-21 06:35:10,433 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b39e3ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 06:35:10, skipping insertion in model container [2023-12-21 06:35:10,433 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 06:35:10" (3/3) ... [2023-12-21 06:35:10,434 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound5.c [2023-12-21 06:35:10,446 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 06:35:10,446 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 06:35:10,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 06:35:10,479 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;@766da680, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 06:35:10,480 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 06:35:10,482 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-12-21 06:35:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-12-21 06:35:10,487 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:10,488 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:35:10,488 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:10,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 67099435, now seen corresponding path program 1 times [2023-12-21 06:35:10,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:10,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190166313] [2023-12-21 06:35:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:10,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:10,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:10,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:10,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190166313] [2023-12-21 06:35:10,692 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-12-21 06:35:10,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937279314] [2023-12-21 06:35:10,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:10,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:10,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:10,710 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:10,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-12-21 06:35:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:10,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2023-12-21 06:35:10,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:10,804 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-12-21 06:35:10,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:10,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937279314] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:10,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:10,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 06:35:10,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695624372] [2023-12-21 06:35:10,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:10,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 06:35:10,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:10,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 06:35:10,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:35:10,834 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.631578947368421) internal successors, (31), 20 states have internal predecessors, (31), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-21 06:35:10,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:10,860 INFO L93 Difference]: Finished difference Result 62 states and 104 transitions. [2023-12-21 06:35:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 06:35:10,862 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 28 [2023-12-21 06:35:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:10,866 INFO L225 Difference]: With dead ends: 62 [2023-12-21 06:35:10,866 INFO L226 Difference]: Without dead ends: 30 [2023-12-21 06:35:10,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 06:35:10,872 INFO L413 NwaCegarLoop]: 39 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, 39 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:10,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-12-21 06:35:10,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-12-21 06:35:10,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 06:35:10,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2023-12-21 06:35:10,902 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 28 [2023-12-21 06:35:10,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:10,903 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2023-12-21 06:35:10,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2023-12-21 06:35:10,903 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2023-12-21 06:35:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-12-21 06:35:10,905 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:10,906 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] [2023-12-21 06:35:10,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:11,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-12-21 06:35:11,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:11,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:11,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1772608446, now seen corresponding path program 1 times [2023-12-21 06:35:11,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:11,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331447759] [2023-12-21 06:35:11,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:11,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:11,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:11,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [711463526] [2023-12-21 06:35:11,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:11,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:11,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:11,136 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:11,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-12-21 06:35:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:11,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2023-12-21 06:35:11,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:11,265 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:35:11,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:11,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331447759] [2023-12-21 06:35:11,266 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:11,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711463526] [2023-12-21 06:35:11,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711463526] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:11,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:11,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-12-21 06:35:11,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24716398] [2023-12-21 06:35:11,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:11,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-12-21 06:35:11,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:11,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-12-21 06:35:11,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-12-21 06:35:11,269 INFO L87 Difference]: Start difference. First operand 30 states and 39 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:35:11,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:11,356 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2023-12-21 06:35:11,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:35:11,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2023-12-21 06:35:11,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:11,358 INFO L225 Difference]: With dead ends: 49 [2023-12-21 06:35:11,358 INFO L226 Difference]: Without dead ends: 42 [2023-12-21 06:35:11,359 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-12-21 06:35:11,361 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:11,361 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 115 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:35:11,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-12-21 06:35:11,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2023-12-21 06:35:11,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-12-21 06:35:11,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-12-21 06:35:11,376 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 29 [2023-12-21 06:35:11,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:11,376 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-12-21 06:35:11,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:35:11,376 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-12-21 06:35:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-12-21 06:35:11,377 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:11,377 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, 1] [2023-12-21 06:35:11,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-12-21 06:35:11,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-12-21 06:35:11,582 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:11,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:11,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1072684582, now seen corresponding path program 1 times [2023-12-21 06:35:11,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:11,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830174343] [2023-12-21 06:35:11,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:11,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:11,622 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:11,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461130615] [2023-12-21 06:35:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:11,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:11,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:11,636 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:11,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-12-21 06:35:11,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:11,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 06:35:11,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:35:11,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830174343] [2023-12-21 06:35:11,777 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461130615] [2023-12-21 06:35:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461130615] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:11,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:11,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-12-21 06:35:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66775614] [2023-12-21 06:35:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-12-21 06:35:11,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-12-21 06:35:11,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2023-12-21 06:35:11,780 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:35:11,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:11,870 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2023-12-21 06:35:11,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 06:35:11,870 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-12-21 06:35:11,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:11,871 INFO L225 Difference]: With dead ends: 48 [2023-12-21 06:35:11,871 INFO L226 Difference]: Without dead ends: 46 [2023-12-21 06:35:11,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-12-21 06:35:11,872 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:11,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 141 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:35:11,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-12-21 06:35:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-12-21 06:35:11,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 29 states have internal predecessors, (34), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-12-21 06:35:11,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2023-12-21 06:35:11,879 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 32 [2023-12-21 06:35:11,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:11,879 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2023-12-21 06:35:11,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2023-12-21 06:35:11,879 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2023-12-21 06:35:11,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-12-21 06:35:11,880 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:11,880 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] [2023-12-21 06:35:11,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-12-21 06:35:12,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:12,085 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:12,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:12,086 INFO L85 PathProgramCache]: Analyzing trace with hash 581538888, now seen corresponding path program 1 times [2023-12-21 06:35:12,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:12,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117271725] [2023-12-21 06:35:12,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:12,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:12,112 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:12,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775167134] [2023-12-21 06:35:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:12,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:12,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:12,114 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:12,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-12-21 06:35:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:12,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 9 conjunts are in the unsatisfiable core [2023-12-21 06:35:12,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:12,212 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:35:12,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:35:12,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:12,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117271725] [2023-12-21 06:35:12,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:12,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775167134] [2023-12-21 06:35:12,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775167134] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:12,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:12,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-12-21 06:35:12,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643638125] [2023-12-21 06:35:12,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 06:35:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:12,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 06:35:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-12-21 06:35:12,288 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:35:12,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:12,419 INFO L93 Difference]: Finished difference Result 98 states and 138 transitions. [2023-12-21 06:35:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 06:35:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2023-12-21 06:35:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:12,420 INFO L225 Difference]: With dead ends: 98 [2023-12-21 06:35:12,420 INFO L226 Difference]: Without dead ends: 91 [2023-12-21 06:35:12,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:35:12,421 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 62 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:12,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 222 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:35:12,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-12-21 06:35:12,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2023-12-21 06:35:12,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 46 states have internal predecessors, (57), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-21 06:35:12,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 90 transitions. [2023-12-21 06:35:12,431 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 90 transitions. Word has length 34 [2023-12-21 06:35:12,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:12,432 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 90 transitions. [2023-12-21 06:35:12,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-12-21 06:35:12,432 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 90 transitions. [2023-12-21 06:35:12,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 06:35:12,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:12,433 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, 1] [2023-12-21 06:35:12,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:12,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:12,643 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:12,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:12,643 INFO L85 PathProgramCache]: Analyzing trace with hash -1534715754, now seen corresponding path program 1 times [2023-12-21 06:35:12,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:12,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621476082] [2023-12-21 06:35:12,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:12,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:12,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:12,652 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648006362] [2023-12-21 06:35:12,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:12,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:12,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:12,653 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:12,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-12-21 06:35:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:12,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 06:35:12,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-12-21 06:35:12,851 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:35:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621476082] [2023-12-21 06:35:12,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:12,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648006362] [2023-12-21 06:35:12,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648006362] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 06:35:12,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:35:12,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-12-21 06:35:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333702895] [2023-12-21 06:35:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:35:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:12,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:35:12,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-12-21 06:35:12,942 INFO L87 Difference]: Start difference. First operand 66 states and 90 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-21 06:35:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:12,984 INFO L93 Difference]: Finished difference Result 74 states and 97 transitions. [2023-12-21 06:35:12,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:35:12,985 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 37 [2023-12-21 06:35:12,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:12,985 INFO L225 Difference]: With dead ends: 74 [2023-12-21 06:35:12,985 INFO L226 Difference]: Without dead ends: 72 [2023-12-21 06:35:12,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:35:12,986 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 122 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 [2023-12-21 06:35:12,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 122 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-12-21 06:35:12,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2023-12-21 06:35:12,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 48 states have (on average 1.25) internal successors, (60), 49 states have internal predecessors, (60), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2023-12-21 06:35:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 93 transitions. [2023-12-21 06:35:12,995 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 93 transitions. Word has length 37 [2023-12-21 06:35:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:12,996 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 93 transitions. [2023-12-21 06:35:12,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-21 06:35:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 93 transitions. [2023-12-21 06:35:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-12-21 06:35:12,996 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:12,997 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-12-21 06:35:13,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:13,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:13,202 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1190433772, now seen corresponding path program 1 times [2023-12-21 06:35:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510138171] [2023-12-21 06:35:13,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:13,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:13,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:13,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [494663176] [2023-12-21 06:35:13,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:13,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:13,233 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:13,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-12-21 06:35:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:13,277 INFO L262 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 29 conjunts are in the unsatisfiable core [2023-12-21 06:35:13,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:13,402 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-12-21 06:35:13,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:35:13,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510138171] [2023-12-21 06:35:13,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:13,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494663176] [2023-12-21 06:35:13,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494663176] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:13,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:13,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2023-12-21 06:35:13,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576670236] [2023-12-21 06:35:13,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:13,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 06:35:13,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:13,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 06:35:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:35:13,470 INFO L87 Difference]: Start difference. First operand 70 states and 93 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:35:13,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:13,666 INFO L93 Difference]: Finished difference Result 113 states and 154 transitions. [2023-12-21 06:35:13,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 06:35:13,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2023-12-21 06:35:13,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:13,667 INFO L225 Difference]: With dead ends: 113 [2023-12-21 06:35:13,667 INFO L226 Difference]: Without dead ends: 111 [2023-12-21 06:35:13,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2023-12-21 06:35:13,668 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 67 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:13,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 297 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:35:13,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-12-21 06:35:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2023-12-21 06:35:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 69 states have (on average 1.2608695652173914) internal successors, (87), 70 states have internal predecessors, (87), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2023-12-21 06:35:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2023-12-21 06:35:13,683 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 37 [2023-12-21 06:35:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:13,683 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2023-12-21 06:35:13,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 11 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2023-12-21 06:35:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2023-12-21 06:35:13,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 06:35:13,684 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:13,685 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, 1] [2023-12-21 06:35:13,689 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-12-21 06:35:13,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:13,889 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:13,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1246105370, now seen corresponding path program 1 times [2023-12-21 06:35:13,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:13,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870462939] [2023-12-21 06:35:13,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:13,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:13,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:13,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [758221404] [2023-12-21 06:35:13,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:13,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:13,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:13,901 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:13,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-12-21 06:35:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:13,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 06:35:13,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:14,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-12-21 06:35:14,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:14,433 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2023-12-21 06:35:14,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:14,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870462939] [2023-12-21 06:35:14,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:14,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758221404] [2023-12-21 06:35:14,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758221404] provided 1 perfect and 1 imperfect interpolant sequences [2023-12-21 06:35:14,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:35:14,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2023-12-21 06:35:14,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370124087] [2023-12-21 06:35:14,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:14,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:35:14,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:35:14,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-12-21 06:35:14,435 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-21 06:35:14,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:14,503 INFO L93 Difference]: Finished difference Result 146 states and 208 transitions. [2023-12-21 06:35:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:35:14,507 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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 42 [2023-12-21 06:35:14,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:14,508 INFO L225 Difference]: With dead ends: 146 [2023-12-21 06:35:14,508 INFO L226 Difference]: Without dead ends: 144 [2023-12-21 06:35:14,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-12-21 06:35:14,508 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 7 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:14,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 114 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:14,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2023-12-21 06:35:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2023-12-21 06:35:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 86 states have (on average 1.2906976744186047) internal successors, (111), 87 states have internal predecessors, (111), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2023-12-21 06:35:14,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 200 transitions. [2023-12-21 06:35:14,534 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 200 transitions. Word has length 42 [2023-12-21 06:35:14,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:14,535 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 200 transitions. [2023-12-21 06:35:14,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 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) [2023-12-21 06:35:14,535 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 200 transitions. [2023-12-21 06:35:14,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-12-21 06:35:14,538 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:14,538 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 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] [2023-12-21 06:35:14,555 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:14,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:14,743 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:14,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:14,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1174265188, now seen corresponding path program 1 times [2023-12-21 06:35:14,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:14,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650474984] [2023-12-21 06:35:14,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:14,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:14,765 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226890577] [2023-12-21 06:35:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:14,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:14,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:14,772 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:14,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-12-21 06:35:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:14,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjunts are in the unsatisfiable core [2023-12-21 06:35:14,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-12-21 06:35:14,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:14,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650474984] [2023-12-21 06:35:14,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:14,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226890577] [2023-12-21 06:35:14,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226890577] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:35:14,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:35:14,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2023-12-21 06:35:14,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324766720] [2023-12-21 06:35:14,967 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:14,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-12-21 06:35:14,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:14,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-12-21 06:35:14,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2023-12-21 06:35:14,967 INFO L87 Difference]: Start difference. First operand 138 states and 200 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:35:15,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:15,125 INFO L93 Difference]: Finished difference Result 214 states and 311 transitions. [2023-12-21 06:35:15,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 06:35:15,125 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-12-21 06:35:15,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:15,127 INFO L225 Difference]: With dead ends: 214 [2023-12-21 06:35:15,127 INFO L226 Difference]: Without dead ends: 212 [2023-12-21 06:35:15,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-21 06:35:15,128 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 36 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:15,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 212 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 06:35:15,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2023-12-21 06:35:15,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 206. [2023-12-21 06:35:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 128 states have (on average 1.296875) internal successors, (166), 129 states have internal predecessors, (166), 69 states have call successors, (69), 8 states have call predecessors, (69), 8 states have return successors, (68), 68 states have call predecessors, (68), 68 states have call successors, (68) [2023-12-21 06:35:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 303 transitions. [2023-12-21 06:35:15,155 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 303 transitions. Word has length 42 [2023-12-21 06:35:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:15,155 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 303 transitions. [2023-12-21 06:35:15,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:35:15,156 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 303 transitions. [2023-12-21 06:35:15,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 06:35:15,156 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:15,156 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, 1] [2023-12-21 06:35:15,177 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-12-21 06:35:15,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-12-21 06:35:15,361 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:15,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:15,362 INFO L85 PathProgramCache]: Analyzing trace with hash 225223382, now seen corresponding path program 1 times [2023-12-21 06:35:15,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:15,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011590848] [2023-12-21 06:35:15,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:15,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:15,369 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:15,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [483252316] [2023-12-21 06:35:15,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:15,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:15,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:15,370 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:15,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-12-21 06:35:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:15,405 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2023-12-21 06:35:15,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:15,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-12-21 06:35:15,440 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:15,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:15,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011590848] [2023-12-21 06:35:15,440 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:15,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483252316] [2023-12-21 06:35:15,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483252316] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:15,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:15,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-12-21 06:35:15,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485796270] [2023-12-21 06:35:15,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:15,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-12-21 06:35:15,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:15,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-12-21 06:35:15,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-12-21 06:35:15,442 INFO L87 Difference]: Start difference. First operand 206 states and 303 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-12-21 06:35:15,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:15,550 INFO L93 Difference]: Finished difference Result 316 states and 492 transitions. [2023-12-21 06:35:15,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-12-21 06:35:15,550 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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 47 [2023-12-21 06:35:15,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:15,552 INFO L225 Difference]: With dead ends: 316 [2023-12-21 06:35:15,552 INFO L226 Difference]: Without dead ends: 314 [2023-12-21 06:35:15,553 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-12-21 06:35:15,553 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:15,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 152 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:15,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-12-21 06:35:15,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 290. [2023-12-21 06:35:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 147 states have (on average 1.2585034013605443) internal successors, (185), 164 states have internal predecessors, (185), 133 states have call successors, (133), 9 states have call predecessors, (133), 9 states have return successors, (132), 116 states have call predecessors, (132), 132 states have call successors, (132) [2023-12-21 06:35:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 450 transitions. [2023-12-21 06:35:15,603 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 450 transitions. Word has length 47 [2023-12-21 06:35:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:15,603 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 450 transitions. [2023-12-21 06:35:15,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 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) [2023-12-21 06:35:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 450 transitions. [2023-12-21 06:35:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-12-21 06:35:15,604 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:15,604 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:35:15,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:15,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:15,809 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -860263338, now seen corresponding path program 2 times [2023-12-21 06:35:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801547175] [2023-12-21 06:35:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:15,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:15,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:15,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [701876015] [2023-12-21 06:35:15,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:35:15,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:15,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:15,818 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:15,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-12-21 06:35:15,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:35:15,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:35:15,857 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 5 conjunts are in the unsatisfiable core [2023-12-21 06:35:15,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:15,874 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2023-12-21 06:35:15,874 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:15,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801547175] [2023-12-21 06:35:15,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:15,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701876015] [2023-12-21 06:35:15,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701876015] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:15,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:15,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 06:35:15,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999679099] [2023-12-21 06:35:15,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:15,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:35:15,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:15,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:35:15,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:35:15,877 INFO L87 Difference]: Start difference. First operand 290 states and 450 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:35:15,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:15,948 INFO L93 Difference]: Finished difference Result 377 states and 574 transitions. [2023-12-21 06:35:15,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 06:35:15,949 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 47 [2023-12-21 06:35:15,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:15,951 INFO L225 Difference]: With dead ends: 377 [2023-12-21 06:35:15,951 INFO L226 Difference]: Without dead ends: 199 [2023-12-21 06:35:15,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-12-21 06:35:15,952 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 19 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:15,952 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 155 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:15,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2023-12-21 06:35:15,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 195. [2023-12-21 06:35:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 100 states have (on average 1.2) internal successors, (120), 111 states have internal predecessors, (120), 85 states have call successors, (85), 9 states have call predecessors, (85), 9 states have return successors, (84), 74 states have call predecessors, (84), 84 states have call successors, (84) [2023-12-21 06:35:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 289 transitions. [2023-12-21 06:35:15,980 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 289 transitions. Word has length 47 [2023-12-21 06:35:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:15,980 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 289 transitions. [2023-12-21 06:35:15,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-12-21 06:35:15,981 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 289 transitions. [2023-12-21 06:35:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-12-21 06:35:15,981 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:15,981 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, 1, 1, 1] [2023-12-21 06:35:16,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-12-21 06:35:16,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-12-21 06:35:16,186 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:16,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:16,186 INFO L85 PathProgramCache]: Analyzing trace with hash 371933676, now seen corresponding path program 1 times [2023-12-21 06:35:16,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:16,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260314297] [2023-12-21 06:35:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:16,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:16,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:16,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152604079] [2023-12-21 06:35:16,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:16,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:16,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:16,195 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:16,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-12-21 06:35:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:16,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 56 conjunts are in the unsatisfiable core [2023-12-21 06:35:16,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-12-21 06:35:16,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:17,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2023-12-21 06:35:17,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:17,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260314297] [2023-12-21 06:35:17,358 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:17,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152604079] [2023-12-21 06:35:17,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152604079] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:17,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:17,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2023-12-21 06:35:17,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426704892] [2023-12-21 06:35:17,359 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:17,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 06:35:17,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:17,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 06:35:17,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2023-12-21 06:35:17,360 INFO L87 Difference]: Start difference. First operand 195 states and 289 transitions. Second operand has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 06:35:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:23,329 INFO L93 Difference]: Finished difference Result 447 states and 664 transitions. [2023-12-21 06:35:23,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-12-21 06:35:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 59 [2023-12-21 06:35:23,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:23,340 INFO L225 Difference]: With dead ends: 447 [2023-12-21 06:35:23,341 INFO L226 Difference]: Without dead ends: 344 [2023-12-21 06:35:23,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=474, Invalid=2282, Unknown=0, NotChecked=0, Total=2756 [2023-12-21 06:35:23,344 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 171 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:23,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 398 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 704 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-12-21 06:35:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-12-21 06:35:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 286. [2023-12-21 06:35:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 167 states have (on average 1.2035928143712575) internal successors, (201), 176 states have internal predecessors, (201), 105 states have call successors, (105), 13 states have call predecessors, (105), 13 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:35:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 410 transitions. [2023-12-21 06:35:23,430 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 410 transitions. Word has length 59 [2023-12-21 06:35:23,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:23,431 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 410 transitions. [2023-12-21 06:35:23,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.9583333333333333) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2023-12-21 06:35:23,432 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 410 transitions. [2023-12-21 06:35:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-21 06:35:23,432 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:23,432 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 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] [2023-12-21 06:35:23,457 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:23,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-12-21 06:35:23,660 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:23,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:23,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1835197705, now seen corresponding path program 1 times [2023-12-21 06:35:23,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:23,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764337138] [2023-12-21 06:35:23,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:23,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:23,668 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:23,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39558706] [2023-12-21 06:35:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:23,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:23,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:23,672 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:23,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-12-21 06:35:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:23,712 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 06:35:23,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-12-21 06:35:23,873 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:23,988 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-12-21 06:35:23,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764337138] [2023-12-21 06:35:23,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:23,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39558706] [2023-12-21 06:35:23,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39558706] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:23,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:23,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 18 [2023-12-21 06:35:23,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306173552] [2023-12-21 06:35:23,989 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:23,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-12-21 06:35:23,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:23,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-12-21 06:35:23,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2023-12-21 06:35:23,991 INFO L87 Difference]: Start difference. First operand 286 states and 410 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-21 06:35:24,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:24,473 INFO L93 Difference]: Finished difference Result 326 states and 471 transitions. [2023-12-21 06:35:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 06:35:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) Word has length 69 [2023-12-21 06:35:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:24,475 INFO L225 Difference]: With dead ends: 326 [2023-12-21 06:35:24,475 INFO L226 Difference]: Without dead ends: 324 [2023-12-21 06:35:24,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2023-12-21 06:35:24,476 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 94 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:24,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 236 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 06:35:24,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-12-21 06:35:24,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 290. [2023-12-21 06:35:24,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 170 states have (on average 1.2) internal successors, (204), 179 states have internal predecessors, (204), 105 states have call successors, (105), 14 states have call predecessors, (105), 14 states have return successors, (104), 96 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:35:24,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 413 transitions. [2023-12-21 06:35:24,556 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 413 transitions. Word has length 69 [2023-12-21 06:35:24,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:24,556 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 413 transitions. [2023-12-21 06:35:24,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 15 states have internal predecessors, (38), 5 states have call successors, (23), 3 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 5 states have call successors, (22) [2023-12-21 06:35:24,556 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 413 transitions. [2023-12-21 06:35:24,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 06:35:24,557 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:24,557 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 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, 1, 1] [2023-12-21 06:35:24,561 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-12-21 06:35:24,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-12-21 06:35:24,764 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:24,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1365578820, now seen corresponding path program 1 times [2023-12-21 06:35:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:24,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330284472] [2023-12-21 06:35:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:24,776 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:24,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [405207095] [2023-12-21 06:35:24,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:24,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:24,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:24,777 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:24,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-12-21 06:35:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:24,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2023-12-21 06:35:24,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-12-21 06:35:24,848 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-12-21 06:35:24,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330284472] [2023-12-21 06:35:24,848 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:24,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405207095] [2023-12-21 06:35:24,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405207095] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 06:35:24,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 06:35:24,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-12-21 06:35:24,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996654089] [2023-12-21 06:35:24,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 06:35:24,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 06:35:24,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 06:35:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:35:24,850 INFO L87 Difference]: Start difference. First operand 290 states and 413 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-21 06:35:24,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:24,980 INFO L93 Difference]: Finished difference Result 516 states and 741 transitions. [2023-12-21 06:35:24,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-12-21 06:35:24,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 72 [2023-12-21 06:35:24,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:24,982 INFO L225 Difference]: With dead ends: 516 [2023-12-21 06:35:24,982 INFO L226 Difference]: Without dead ends: 316 [2023-12-21 06:35:24,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-12-21 06:35:24,983 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 0 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:24,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 91 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 06:35:24,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2023-12-21 06:35:25,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 307. [2023-12-21 06:35:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 188 states have internal predecessors, (225), 105 states have call successors, (105), 14 states have call predecessors, (105), 14 states have return successors, (104), 104 states have call predecessors, (104), 104 states have call successors, (104) [2023-12-21 06:35:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 434 transitions. [2023-12-21 06:35:25,066 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 434 transitions. Word has length 72 [2023-12-21 06:35:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:25,066 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 434 transitions. [2023-12-21 06:35:25,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2023-12-21 06:35:25,066 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 434 transitions. [2023-12-21 06:35:25,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-12-21 06:35:25,067 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:25,067 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 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, 1] [2023-12-21 06:35:25,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-12-21 06:35:25,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-12-21 06:35:25,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:25,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:25,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1054791738, now seen corresponding path program 2 times [2023-12-21 06:35:25,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:25,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026440701] [2023-12-21 06:35:25,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:25,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:25,281 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:25,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [699839788] [2023-12-21 06:35:25,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:35:25,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:25,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:25,282 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:25,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-12-21 06:35:25,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:35:25,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:35:25,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 64 conjunts are in the unsatisfiable core [2023-12-21 06:35:25,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:25,957 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 35 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2023-12-21 06:35:25,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 18 proven. 26 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-12-21 06:35:27,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026440701] [2023-12-21 06:35:27,608 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699839788] [2023-12-21 06:35:27,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699839788] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:27,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:27,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2023-12-21 06:35:27,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463625455] [2023-12-21 06:35:27,611 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:27,611 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 06:35:27,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:27,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 06:35:27,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2023-12-21 06:35:27,612 INFO L87 Difference]: Start difference. First operand 307 states and 434 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-21 06:35:32,416 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:35:44,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:35:44,706 INFO L93 Difference]: Finished difference Result 393 states and 540 transitions. [2023-12-21 06:35:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-12-21 06:35:44,707 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 72 [2023-12-21 06:35:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:35:44,708 INFO L225 Difference]: With dead ends: 393 [2023-12-21 06:35:44,709 INFO L226 Difference]: Without dead ends: 391 [2023-12-21 06:35:44,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=632, Invalid=2908, Unknown=0, NotChecked=0, Total=3540 [2023-12-21 06:35:44,710 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 200 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 704 mSolverCounterSat, 207 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 704 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2023-12-21 06:35:44,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 443 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 704 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2023-12-21 06:35:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-12-21 06:35:44,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 347. [2023-12-21 06:35:44,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 217 states have (on average 1.1797235023041475) internal successors, (256), 220 states have internal predecessors, (256), 109 states have call successors, (109), 20 states have call predecessors, (109), 20 states have return successors, (108), 106 states have call predecessors, (108), 108 states have call successors, (108) [2023-12-21 06:35:44,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 473 transitions. [2023-12-21 06:35:44,828 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 473 transitions. Word has length 72 [2023-12-21 06:35:44,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:35:44,828 INFO L495 AbstractCegarLoop]: Abstraction has 347 states and 473 transitions. [2023-12-21 06:35:44,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 27 states have internal predecessors, (63), 8 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2023-12-21 06:35:44,829 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 473 transitions. [2023-12-21 06:35:44,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2023-12-21 06:35:44,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:35:44,830 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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, 1] [2023-12-21 06:35:44,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-12-21 06:35:45,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:45,030 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:35:45,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:35:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 807741843, now seen corresponding path program 1 times [2023-12-21 06:35:45,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:35:45,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222816866] [2023-12-21 06:35:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:45,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:35:45,037 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:35:45,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119185293] [2023-12-21 06:35:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:35:45,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:35:45,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:35:45,038 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:35:45,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-12-21 06:35:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:35:45,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 82 conjunts are in the unsatisfiable core [2023-12-21 06:35:45,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:35:46,016 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 36 proven. 32 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2023-12-21 06:35:46,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:35:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2023-12-21 06:35:52,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:35:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222816866] [2023-12-21 06:35:52,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:35:52,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119185293] [2023-12-21 06:35:52,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119185293] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:35:52,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:35:52,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 34 [2023-12-21 06:35:52,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862275924] [2023-12-21 06:35:52,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:35:52,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-12-21 06:35:52,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:35:52,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-12-21 06:35:52,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=957, Unknown=0, NotChecked=0, Total=1122 [2023-12-21 06:35:52,572 INFO L87 Difference]: Start difference. First operand 347 states and 473 transitions. Second operand has 34 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-12-21 06:36:13,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:36:13,056 INFO L93 Difference]: Finished difference Result 530 states and 742 transitions. [2023-12-21 06:36:13,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-21 06:36:13,056 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 86 [2023-12-21 06:36:13,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:36:13,058 INFO L225 Difference]: With dead ends: 530 [2023-12-21 06:36:13,059 INFO L226 Difference]: Without dead ends: 522 [2023-12-21 06:36:13,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1317, Invalid=5489, Unknown=0, NotChecked=0, Total=6806 [2023-12-21 06:36:13,062 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 363 mSDsluCounter, 817 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 303 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 303 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:36:13,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 865 Invalid, 1744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [303 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-12-21 06:36:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2023-12-21 06:36:13,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 498. [2023-12-21 06:36:13,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 310 states have (on average 1.2) internal successors, (372), 314 states have internal predecessors, (372), 163 states have call successors, (163), 24 states have call predecessors, (163), 24 states have return successors, (162), 159 states have call predecessors, (162), 162 states have call successors, (162) [2023-12-21 06:36:13,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 697 transitions. [2023-12-21 06:36:13,371 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 697 transitions. Word has length 86 [2023-12-21 06:36:13,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:36:13,371 INFO L495 AbstractCegarLoop]: Abstraction has 498 states and 697 transitions. [2023-12-21 06:36:13,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 31 states have (on average 1.967741935483871) internal successors, (61), 31 states have internal predecessors, (61), 10 states have call successors, (24), 3 states have call predecessors, (24), 3 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2023-12-21 06:36:13,372 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 697 transitions. [2023-12-21 06:36:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-12-21 06:36:13,372 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:36:13,372 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:36:13,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-12-21 06:36:13,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-12-21 06:36:13,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:36:13,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:36:13,578 INFO L85 PathProgramCache]: Analyzing trace with hash 263580550, now seen corresponding path program 3 times [2023-12-21 06:36:13,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:36:13,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127122307] [2023-12-21 06:36:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:13,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:36:13,595 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:36:13,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969178602] [2023-12-21 06:36:13,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:36:13,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:13,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:36:13,610 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:36:13,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-12-21 06:36:13,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-12-21 06:36:13,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:36:13,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 61 conjunts are in the unsatisfiable core [2023-12-21 06:36:13,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:36:14,255 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2023-12-21 06:36:14,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:36:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 16 proven. 38 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2023-12-21 06:36:15,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:36:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127122307] [2023-12-21 06:36:15,565 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:36:15,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969178602] [2023-12-21 06:36:15,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969178602] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:36:15,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:36:15,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-12-21 06:36:15,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636238519] [2023-12-21 06:36:15,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:36:15,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-12-21 06:36:15,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:36:15,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-12-21 06:36:15,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2023-12-21 06:36:15,567 INFO L87 Difference]: Start difference. First operand 498 states and 697 transitions. Second operand has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-21 06:36:43,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:36:43,946 INFO L93 Difference]: Finished difference Result 722 states and 1036 transitions. [2023-12-21 06:36:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-12-21 06:36:43,947 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) Word has length 92 [2023-12-21 06:36:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:36:43,949 INFO L225 Difference]: With dead ends: 722 [2023-12-21 06:36:43,949 INFO L226 Difference]: Without dead ends: 720 [2023-12-21 06:36:43,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=1040, Invalid=4510, Unknown=0, NotChecked=0, Total=5550 [2023-12-21 06:36:43,951 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 308 mSDsluCounter, 609 mSDsCounter, 0 mSdLazyCounter, 907 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 1175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 907 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:36:43,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 647 Invalid, 1175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 907 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-12-21 06:36:43,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-12-21 06:36:44,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 584. [2023-12-21 06:36:44,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 367 states have internal predecessors, (437), 193 states have call successors, (193), 26 states have call predecessors, (193), 26 states have return successors, (192), 190 states have call predecessors, (192), 192 states have call successors, (192) [2023-12-21 06:36:44,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 822 transitions. [2023-12-21 06:36:44,381 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 822 transitions. Word has length 92 [2023-12-21 06:36:44,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:36:44,382 INFO L495 AbstractCegarLoop]: Abstraction has 584 states and 822 transitions. [2023-12-21 06:36:44,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.193548387096774) internal successors, (68), 28 states have internal predecessors, (68), 7 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (21), 6 states have call predecessors, (21), 5 states have call successors, (21) [2023-12-21 06:36:44,382 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 822 transitions. [2023-12-21 06:36:44,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2023-12-21 06:36:44,383 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:36:44,384 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 5, 4, 4, 4, 4, 3, 3, 3, 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] [2023-12-21 06:36:44,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-12-21 06:36:44,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-12-21 06:36:44,588 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:36:44,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:36:44,589 INFO L85 PathProgramCache]: Analyzing trace with hash -842150628, now seen corresponding path program 2 times [2023-12-21 06:36:44,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:36:44,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455017036] [2023-12-21 06:36:44,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:44,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:36:44,601 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:36:44,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [284325414] [2023-12-21 06:36:44,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:36:44,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:44,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:36:44,602 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:36:44,648 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-12-21 06:36:44,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:36:44,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:36:44,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 10 conjunts are in the unsatisfiable core [2023-12-21 06:36:44,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:36:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-21 06:36:44,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:36:44,826 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2023-12-21 06:36:44,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:36:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455017036] [2023-12-21 06:36:44,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:36:44,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284325414] [2023-12-21 06:36:44,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284325414] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:36:44,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:36:44,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2023-12-21 06:36:44,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148090071] [2023-12-21 06:36:44,827 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:36:44,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-12-21 06:36:44,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:36:44,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-12-21 06:36:44,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2023-12-21 06:36:44,828 INFO L87 Difference]: Start difference. First operand 584 states and 822 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-21 06:36:45,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:36:45,634 INFO L93 Difference]: Finished difference Result 693 states and 996 transitions. [2023-12-21 06:36:45,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-12-21 06:36:45,634 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 94 [2023-12-21 06:36:45,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:36:45,637 INFO L225 Difference]: With dead ends: 693 [2023-12-21 06:36:45,637 INFO L226 Difference]: Without dead ends: 686 [2023-12-21 06:36:45,637 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 176 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-12-21 06:36:45,638 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 67 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:36:45,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 383 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 06:36:45,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2023-12-21 06:36:46,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 558. [2023-12-21 06:36:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 342 states have (on average 1.2017543859649122) internal successors, (411), 345 states have internal predecessors, (411), 189 states have call successors, (189), 26 states have call predecessors, (189), 26 states have return successors, (188), 186 states have call predecessors, (188), 188 states have call successors, (188) [2023-12-21 06:36:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 788 transitions. [2023-12-21 06:36:46,030 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 788 transitions. Word has length 94 [2023-12-21 06:36:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:36:46,030 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 788 transitions. [2023-12-21 06:36:46,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 4 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2023-12-21 06:36:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 788 transitions. [2023-12-21 06:36:46,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-12-21 06:36:46,032 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:36:46,032 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 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, 1, 1, 1, 1] [2023-12-21 06:36:46,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-12-21 06:36:46,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-12-21 06:36:46,237 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:36:46,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:36:46,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1341117113, now seen corresponding path program 2 times [2023-12-21 06:36:46,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:36:46,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082581089] [2023-12-21 06:36:46,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:36:46,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:36:46,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:36:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003902458] [2023-12-21 06:36:46,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:36:46,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:36:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:36:46,246 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:36:46,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-12-21 06:36:46,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:36:46,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:36:46,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 73 conjunts are in the unsatisfiable core [2023-12-21 06:36:46,303 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:36:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 44 proven. 52 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2023-12-21 06:36:47,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:36:51,979 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 38 proven. 46 refuted. 0 times theorem prover too weak. 255 trivial. 0 not checked. [2023-12-21 06:36:51,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:36:51,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082581089] [2023-12-21 06:36:51,979 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:36:51,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003902458] [2023-12-21 06:36:51,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003902458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:36:51,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:36:51,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2023-12-21 06:36:51,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662435867] [2023-12-21 06:36:51,980 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:36:51,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-12-21 06:36:51,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:36:51,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-12-21 06:36:51,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2023-12-21 06:36:51,984 INFO L87 Difference]: Start difference. First operand 558 states and 788 transitions. Second operand has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2023-12-21 06:37:13,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:13,670 INFO L93 Difference]: Finished difference Result 802 states and 1120 transitions. [2023-12-21 06:37:13,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-12-21 06:37:13,671 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) Word has length 106 [2023-12-21 06:37:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:13,674 INFO L225 Difference]: With dead ends: 802 [2023-12-21 06:37:13,674 INFO L226 Difference]: Without dead ends: 625 [2023-12-21 06:37:13,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1240, Invalid=4766, Unknown=0, NotChecked=0, Total=6006 [2023-12-21 06:37:13,677 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 169 mSDsluCounter, 476 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:13,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 506 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2023-12-21 06:37:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2023-12-21 06:37:14,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 589. [2023-12-21 06:37:14,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 360 states have (on average 1.1972222222222222) internal successors, (431), 363 states have internal predecessors, (431), 201 states have call successors, (201), 27 states have call predecessors, (201), 27 states have return successors, (200), 198 states have call predecessors, (200), 200 states have call successors, (200) [2023-12-21 06:37:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 832 transitions. [2023-12-21 06:37:14,165 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 832 transitions. Word has length 106 [2023-12-21 06:37:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:14,166 INFO L495 AbstractCegarLoop]: Abstraction has 589 states and 832 transitions. [2023-12-21 06:37:14,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 10 states have call predecessors, (32), 9 states have call successors, (32) [2023-12-21 06:37:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 832 transitions. [2023-12-21 06:37:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:37:14,168 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:14,168 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:37:14,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-12-21 06:37:14,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-12-21 06:37:14,373 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:14,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:14,373 INFO L85 PathProgramCache]: Analyzing trace with hash 909912329, now seen corresponding path program 1 times [2023-12-21 06:37:14,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:14,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377238764] [2023-12-21 06:37:14,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:14,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:14,380 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:14,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335364956] [2023-12-21 06:37:14,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:14,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:14,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:14,381 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:37:14,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-12-21 06:37:14,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:37:14,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 43 conjunts are in the unsatisfiable core [2023-12-21 06:37:14,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 37 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2023-12-21 06:37:14,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:37:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 55 proven. 14 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2023-12-21 06:37:15,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:37:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377238764] [2023-12-21 06:37:15,585 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:37:15,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335364956] [2023-12-21 06:37:15,585 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335364956] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:37:15,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:37:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2023-12-21 06:37:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681622355] [2023-12-21 06:37:15,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:37:15,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 06:37:15,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:37:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 06:37:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2023-12-21 06:37:15,587 INFO L87 Difference]: Start difference. First operand 589 states and 832 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 24 states have internal predecessors, (61), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-12-21 06:37:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:19,977 INFO L93 Difference]: Finished difference Result 1312 states and 1994 transitions. [2023-12-21 06:37:19,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-12-21 06:37:19,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 24 states have internal predecessors, (61), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) Word has length 119 [2023-12-21 06:37:19,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:19,982 INFO L225 Difference]: With dead ends: 1312 [2023-12-21 06:37:19,982 INFO L226 Difference]: Without dead ends: 1181 [2023-12-21 06:37:19,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 231 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1787 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1175, Invalid=4987, Unknown=0, NotChecked=0, Total=6162 [2023-12-21 06:37:19,984 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 271 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:19,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 724 Invalid, 993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-12-21 06:37:19,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2023-12-21 06:37:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1012. [2023-12-21 06:37:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 551 states have (on average 1.250453720508167) internal successors, (689), 556 states have internal predecessors, (689), 428 states have call successors, (428), 32 states have call predecessors, (428), 32 states have return successors, (427), 423 states have call predecessors, (427), 427 states have call successors, (427) [2023-12-21 06:37:21,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1544 transitions. [2023-12-21 06:37:21,040 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1544 transitions. Word has length 119 [2023-12-21 06:37:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:21,042 INFO L495 AbstractCegarLoop]: Abstraction has 1012 states and 1544 transitions. [2023-12-21 06:37:21,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 24 states have internal predecessors, (61), 10 states have call successors, (37), 3 states have call predecessors, (37), 2 states have return successors, (36), 10 states have call predecessors, (36), 10 states have call successors, (36) [2023-12-21 06:37:21,043 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1544 transitions. [2023-12-21 06:37:21,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:37:21,045 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:21,045 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 4, 4, 4, 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] [2023-12-21 06:37:21,062 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-12-21 06:37:21,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:21,250 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:21,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:21,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1510458229, now seen corresponding path program 2 times [2023-12-21 06:37:21,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:21,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885237012] [2023-12-21 06:37:21,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:21,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:21,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:21,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1558735184] [2023-12-21 06:37:21,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:37:21,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:21,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:21,259 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:37:21,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-12-21 06:37:21,324 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:37:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:37:21,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 22 conjunts are in the unsatisfiable core [2023-12-21 06:37:21,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 89 proven. 45 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2023-12-21 06:37:21,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:37:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 46 proven. 44 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2023-12-21 06:37:22,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:37:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885237012] [2023-12-21 06:37:22,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:37:22,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558735184] [2023-12-21 06:37:22,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558735184] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:37:22,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:37:22,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2023-12-21 06:37:22,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206295836] [2023-12-21 06:37:22,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:37:22,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 06:37:22,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:37:22,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 06:37:22,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-12-21 06:37:22,120 INFO L87 Difference]: Start difference. First operand 1012 states and 1544 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 10 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-21 06:37:28,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:28,331 INFO L93 Difference]: Finished difference Result 1988 states and 3123 transitions. [2023-12-21 06:37:28,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-12-21 06:37:28,332 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 10 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) Word has length 119 [2023-12-21 06:37:28,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:28,337 INFO L225 Difference]: With dead ends: 1988 [2023-12-21 06:37:28,337 INFO L226 Difference]: Without dead ends: 1614 [2023-12-21 06:37:28,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3471 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2082, Invalid=9690, Unknown=0, NotChecked=0, Total=11772 [2023-12-21 06:37:28,342 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 235 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1223 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:28,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1223 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-12-21 06:37:28,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2023-12-21 06:37:29,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 1324. [2023-12-21 06:37:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1324 states, 710 states have (on average 1.2732394366197184) internal successors, (904), 716 states have internal predecessors, (904), 581 states have call successors, (581), 32 states have call predecessors, (581), 32 states have return successors, (580), 575 states have call predecessors, (580), 580 states have call successors, (580) [2023-12-21 06:37:29,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1324 states to 1324 states and 2065 transitions. [2023-12-21 06:37:29,884 INFO L78 Accepts]: Start accepts. Automaton has 1324 states and 2065 transitions. Word has length 119 [2023-12-21 06:37:29,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:29,885 INFO L495 AbstractCegarLoop]: Abstraction has 1324 states and 2065 transitions. [2023-12-21 06:37:29,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 10 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (34), 9 states have call predecessors, (34), 10 states have call successors, (34) [2023-12-21 06:37:29,885 INFO L276 IsEmpty]: Start isEmpty. Operand 1324 states and 2065 transitions. [2023-12-21 06:37:29,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:37:29,887 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:29,888 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:37:29,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-12-21 06:37:30,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:30,092 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:30,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:30,093 INFO L85 PathProgramCache]: Analyzing trace with hash -587810689, now seen corresponding path program 3 times [2023-12-21 06:37:30,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:30,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345089586] [2023-12-21 06:37:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:30,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:30,102 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:30,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559606916] [2023-12-21 06:37:30,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:37:30,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:30,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:30,106 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-12-21 06:37:30,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-12-21 06:37:30,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 06:37:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:37:30,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 06:37:30,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 47 proven. 54 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2023-12-21 06:37:30,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:37:31,346 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2023-12-21 06:37:31,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:37:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345089586] [2023-12-21 06:37:31,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:37:31,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559606916] [2023-12-21 06:37:31,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559606916] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:37:31,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:37:31,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 28 [2023-12-21 06:37:31,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047732440] [2023-12-21 06:37:31,347 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:37:31,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 06:37:31,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:37:31,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 06:37:31,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2023-12-21 06:37:31,349 INFO L87 Difference]: Start difference. First operand 1324 states and 2065 transitions. Second operand has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2023-12-21 06:37:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:43,007 INFO L93 Difference]: Finished difference Result 3814 states and 6237 transitions. [2023-12-21 06:37:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2023-12-21 06:37:43,008 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 119 [2023-12-21 06:37:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:43,019 INFO L225 Difference]: With dead ends: 3814 [2023-12-21 06:37:43,019 INFO L226 Difference]: Without dead ends: 3325 [2023-12-21 06:37:43,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 209 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4583 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3461, Invalid=11545, Unknown=0, NotChecked=0, Total=15006 [2023-12-21 06:37:43,024 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 301 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 950 SdHoareTripleChecker+Invalid, 1106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:43,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 950 Invalid, 1106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-12-21 06:37:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3325 states. [2023-12-21 06:37:45,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3325 to 1766. [2023-12-21 06:37:45,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 900 states have (on average 1.32) internal successors, (1188), 901 states have internal predecessors, (1188), 833 states have call successors, (833), 32 states have call predecessors, (833), 32 states have return successors, (832), 832 states have call predecessors, (832), 832 states have call successors, (832) [2023-12-21 06:37:45,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 2853 transitions. [2023-12-21 06:37:45,625 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 2853 transitions. Word has length 119 [2023-12-21 06:37:45,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:45,625 INFO L495 AbstractCegarLoop]: Abstraction has 1766 states and 2853 transitions. [2023-12-21 06:37:45,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.6785714285714284) internal successors, (75), 26 states have internal predecessors, (75), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2023-12-21 06:37:45,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 2853 transitions. [2023-12-21 06:37:45,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-12-21 06:37:45,627 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:45,627 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:37:45,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-12-21 06:37:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:45,831 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:45,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:45,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1653462207, now seen corresponding path program 4 times [2023-12-21 06:37:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452304219] [2023-12-21 06:37:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:45,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:45,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433071618] [2023-12-21 06:37:45,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 06:37:45,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:45,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:45,846 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) [2023-12-21 06:37:45,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-12-21 06:37:45,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 06:37:45,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:37:45,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 06:37:45,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:46,100 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 62 proven. 39 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2023-12-21 06:37:46,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:37:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 382 backedges. 60 proven. 41 refuted. 0 times theorem prover too weak. 281 trivial. 0 not checked. [2023-12-21 06:37:46,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:37:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452304219] [2023-12-21 06:37:46,337 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:37:46,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433071618] [2023-12-21 06:37:46,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433071618] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:37:46,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:37:46,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2023-12-21 06:37:46,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723532456] [2023-12-21 06:37:46,337 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:37:46,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-12-21 06:37:46,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:37:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-12-21 06:37:46,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2023-12-21 06:37:46,339 INFO L87 Difference]: Start difference. First operand 1766 states and 2853 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2023-12-21 06:37:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:37:51,177 INFO L93 Difference]: Finished difference Result 2777 states and 4519 transitions. [2023-12-21 06:37:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-12-21 06:37:51,178 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) Word has length 119 [2023-12-21 06:37:51,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:37:51,205 INFO L225 Difference]: With dead ends: 2777 [2023-12-21 06:37:51,206 INFO L226 Difference]: Without dead ends: 2498 [2023-12-21 06:37:51,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=894, Invalid=3012, Unknown=0, NotChecked=0, Total=3906 [2023-12-21 06:37:51,213 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 220 mSDsluCounter, 963 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1048 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-12-21 06:37:51,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1048 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-12-21 06:37:51,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2498 states. [2023-12-21 06:37:54,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2498 to 2101. [2023-12-21 06:37:54,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2101 states, 1059 states have (on average 1.332389046270066) internal successors, (1411), 1060 states have internal predecessors, (1411), 1009 states have call successors, (1009), 32 states have call predecessors, (1009), 32 states have return successors, (1008), 1008 states have call predecessors, (1008), 1008 states have call successors, (1008) [2023-12-21 06:37:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2101 states to 2101 states and 3428 transitions. [2023-12-21 06:37:54,423 INFO L78 Accepts]: Start accepts. Automaton has 2101 states and 3428 transitions. Word has length 119 [2023-12-21 06:37:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:37:54,424 INFO L495 AbstractCegarLoop]: Abstraction has 2101 states and 3428 transitions. [2023-12-21 06:37:54,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 25 states have internal predecessors, (72), 10 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 9 states have call predecessors, (31), 9 states have call successors, (31) [2023-12-21 06:37:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 2101 states and 3428 transitions. [2023-12-21 06:37:54,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-21 06:37:54,426 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:37:54,426 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:37:54,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-12-21 06:37:54,630 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 [2023-12-21 06:37:54,630 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:37:54,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:37:54,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1949761216, now seen corresponding path program 3 times [2023-12-21 06:37:54,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:37:54,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876267628] [2023-12-21 06:37:54,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:37:54,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:37:54,659 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:37:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681813809] [2023-12-21 06:37:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 06:37:54,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:37:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:37:54,666 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) [2023-12-21 06:37:54,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-12-21 06:37:54,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-12-21 06:37:54,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:37:54,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-21 06:37:54,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:37:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 414 trivial. 0 not checked. [2023-12-21 06:37:59,745 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:38:02,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:38:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876267628] [2023-12-21 06:38:02,230 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:38:02,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681813809] [2023-12-21 06:38:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681813809] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:38:02,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:38:02,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 06:38:02,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052968917] [2023-12-21 06:38:02,231 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:38:02,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 06:38:02,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:38:02,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 06:38:02,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1050, Unknown=0, NotChecked=0, Total=1260 [2023-12-21 06:38:02,233 INFO L87 Difference]: Start difference. First operand 2101 states and 3428 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-21 06:38:07,273 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 06:38:16,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 06:38:20,532 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 06:38:24,659 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 06:38:28,703 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-12-21 06:38:31,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:38:31,292 INFO L93 Difference]: Finished difference Result 2860 states and 4645 transitions. [2023-12-21 06:38:31,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 06:38:31,292 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 133 [2023-12-21 06:38:31,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:38:31,299 INFO L225 Difference]: With dead ends: 2860 [2023-12-21 06:38:31,299 INFO L226 Difference]: Without dead ends: 1911 [2023-12-21 06:38:31,301 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=287, Invalid=1518, Unknown=1, NotChecked=0, Total=1806 [2023-12-21 06:38:31,302 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 936 mSolverCounterSat, 33 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 974 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 936 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2023-12-21 06:38:31,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 432 Invalid, 974 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 936 Invalid, 5 Unknown, 0 Unchecked, 21.7s Time] [2023-12-21 06:38:31,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2023-12-21 06:38:34,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1907. [2023-12-21 06:38:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1907 states, 965 states have (on average 1.3253886010362694) internal successors, (1279), 966 states have internal predecessors, (1279), 909 states have call successors, (909), 32 states have call predecessors, (909), 32 states have return successors, (908), 908 states have call predecessors, (908), 908 states have call successors, (908) [2023-12-21 06:38:34,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1907 states to 1907 states and 3096 transitions. [2023-12-21 06:38:34,135 INFO L78 Accepts]: Start accepts. Automaton has 1907 states and 3096 transitions. Word has length 133 [2023-12-21 06:38:34,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:38:34,135 INFO L495 AbstractCegarLoop]: Abstraction has 1907 states and 3096 transitions. [2023-12-21 06:38:34,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 21 states have internal predecessors, (43), 8 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2023-12-21 06:38:34,136 INFO L276 IsEmpty]: Start isEmpty. Operand 1907 states and 3096 transitions. [2023-12-21 06:38:34,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-12-21 06:38:34,137 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:38:34,137 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:38:34,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-12-21 06:38:34,337 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 [2023-12-21 06:38:34,338 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:38:34,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:38:34,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1696464488, now seen corresponding path program 4 times [2023-12-21 06:38:34,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:38:34,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689321647] [2023-12-21 06:38:34,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:38:34,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:38:34,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:38:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606560244] [2023-12-21 06:38:34,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-12-21 06:38:34,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:34,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:38:34,350 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) [2023-12-21 06:38:34,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-12-21 06:38:34,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-12-21 06:38:34,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:38:34,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 83 conjunts are in the unsatisfiable core [2023-12-21 06:38:34,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:38:35,762 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-12-21 06:38:35,762 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:38:37,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:38:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689321647] [2023-12-21 06:38:37,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:38:37,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606560244] [2023-12-21 06:38:37,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606560244] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:38:37,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:38:37,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-12-21 06:38:37,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884903755] [2023-12-21 06:38:37,063 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:38:37,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-12-21 06:38:37,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:38:37,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-12-21 06:38:37,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=798, Unknown=0, NotChecked=0, Total=930 [2023-12-21 06:38:37,064 INFO L87 Difference]: Start difference. First operand 1907 states and 3096 transitions. Second operand has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 06:38:41,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:38:41,370 INFO L93 Difference]: Finished difference Result 1966 states and 3159 transitions. [2023-12-21 06:38:41,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-12-21 06:38:41,371 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) Word has length 133 [2023-12-21 06:38:41,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:38:41,377 INFO L225 Difference]: With dead ends: 1966 [2023-12-21 06:38:41,377 INFO L226 Difference]: Without dead ends: 1956 [2023-12-21 06:38:41,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2023-12-21 06:38:41,378 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 88 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1093 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 751 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-12-21 06:38:41,378 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 751 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1093 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-12-21 06:38:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2023-12-21 06:38:44,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1939. [2023-12-21 06:38:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 984 states have (on average 1.3201219512195121) internal successors, (1299), 985 states have internal predecessors, (1299), 917 states have call successors, (917), 37 states have call predecessors, (917), 37 states have return successors, (916), 916 states have call predecessors, (916), 916 states have call successors, (916) [2023-12-21 06:38:44,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3132 transitions. [2023-12-21 06:38:44,211 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3132 transitions. Word has length 133 [2023-12-21 06:38:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:38:44,212 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3132 transitions. [2023-12-21 06:38:44,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 7 states have call predecessors, (20), 8 states have call successors, (20) [2023-12-21 06:38:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3132 transitions. [2023-12-21 06:38:44,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-12-21 06:38:44,214 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:38:44,214 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 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, 1] [2023-12-21 06:38:44,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-12-21 06:38:44,419 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 [2023-12-21 06:38:44,419 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:38:44,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:38:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 649151390, now seen corresponding path program 5 times [2023-12-21 06:38:44,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:38:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144876191] [2023-12-21 06:38:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:38:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:38:44,426 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:38:44,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1043396458] [2023-12-21 06:38:44,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-12-21 06:38:44,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:38:44,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:38:44,428 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) [2023-12-21 06:38:44,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-12-21 06:38:44,581 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-12-21 06:38:44,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:38:44,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 92 conjunts are in the unsatisfiable core [2023-12-21 06:38:44,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:38:46,470 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 45 proven. 152 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-12-21 06:38:46,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:39:00,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:39:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144876191] [2023-12-21 06:39:00,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:39:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043396458] [2023-12-21 06:39:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043396458] provided 0 perfect and 1 imperfect interpolant sequences [2023-12-21 06:39:00,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-12-21 06:39:00,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2023-12-21 06:39:00,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360681546] [2023-12-21 06:39:00,683 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-12-21 06:39:00,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-12-21 06:39:00,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:39:00,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-12-21 06:39:00,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1270, Unknown=1, NotChecked=0, Total=1406 [2023-12-21 06:39:00,684 INFO L87 Difference]: Start difference. First operand 1939 states and 3132 transitions. Second operand has 26 states, 25 states have (on average 1.96) internal successors, (49), 22 states have internal predecessors, (49), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-21 06:39:05,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:39:05,053 INFO L93 Difference]: Finished difference Result 1991 states and 3197 transitions. [2023-12-21 06:39:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-12-21 06:39:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 22 states have internal predecessors, (49), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 138 [2023-12-21 06:39:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:39:05,060 INFO L225 Difference]: With dead ends: 1991 [2023-12-21 06:39:05,060 INFO L226 Difference]: Without dead ends: 1981 [2023-12-21 06:39:05,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=243, Invalid=2306, Unknown=1, NotChecked=0, Total=2550 [2023-12-21 06:39:05,061 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 06:39:05,062 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 527 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 06:39:05,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2023-12-21 06:39:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1961. [2023-12-21 06:39:07,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 993 states have (on average 1.3192346424974823) internal successors, (1310), 994 states have internal predecessors, (1310), 929 states have call successors, (929), 38 states have call predecessors, (929), 38 states have return successors, (928), 928 states have call predecessors, (928), 928 states have call successors, (928) [2023-12-21 06:39:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3167 transitions. [2023-12-21 06:39:07,991 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3167 transitions. Word has length 138 [2023-12-21 06:39:07,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:39:07,992 INFO L495 AbstractCegarLoop]: Abstraction has 1961 states and 3167 transitions. [2023-12-21 06:39:07,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.96) internal successors, (49), 22 states have internal predecessors, (49), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2023-12-21 06:39:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3167 transitions. [2023-12-21 06:39:07,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-21 06:39:07,994 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:39:07,994 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:39:08,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-12-21 06:39:08,199 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 [2023-12-21 06:39:08,199 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:39:08,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:39:08,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1678810135, now seen corresponding path program 6 times [2023-12-21 06:39:08,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:39:08,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605615565] [2023-12-21 06:39:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:39:08,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:39:08,209 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:39:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [567915528] [2023-12-21 06:39:08,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-12-21 06:39:08,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:39:08,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:39:08,211 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) [2023-12-21 06:39:08,212 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-12-21 06:39:08,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-12-21 06:39:08,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:39:08,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 113 conjunts are in the unsatisfiable core [2023-12-21 06:39:08,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:39:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 55 proven. 118 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-12-21 06:39:09,826 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:39:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 46 proven. 115 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-21 06:39:18,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:39:18,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605615565] [2023-12-21 06:39:18,309 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:39:18,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567915528] [2023-12-21 06:39:18,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567915528] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:39:18,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:39:18,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 22] total 46 [2023-12-21 06:39:18,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132081632] [2023-12-21 06:39:18,310 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:39:18,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-12-21 06:39:18,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:39:18,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-12-21 06:39:18,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=1738, Unknown=0, NotChecked=0, Total=2070 [2023-12-21 06:39:18,311 INFO L87 Difference]: Start difference. First operand 1961 states and 3167 transitions. Second operand has 46 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 06:39:26,081 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:41,373 WARN L293 SmtUtils]: Spent 9.38s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:39:43,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:54,178 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:39:56,164 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:02,430 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.86s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:06,459 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:13,044 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:17,046 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:48,003 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:56,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.89s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:40:58,872 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:41:08,515 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:41:20,717 WARN L293 SmtUtils]: Spent 11.82s on a formula simplification that was a NOOP. DAG size: 154 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:41:30,230 WARN L293 SmtUtils]: Spent 5.77s on a formula simplification that was a NOOP. DAG size: 130 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:41:43,489 WARN L293 SmtUtils]: Spent 11.72s on a formula simplification that was a NOOP. DAG size: 138 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:41:45,036 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:41:53,651 WARN L293 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:42:02,820 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:10,556 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:42:31,768 WARN L293 SmtUtils]: Spent 20.31s on a formula simplification. DAG size of input: 139 DAG size of output: 137 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:42:47,726 WARN L293 SmtUtils]: Spent 6.80s on a formula simplification that was a NOOP. DAG size: 125 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:43:17,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:43:44,558 WARN L293 SmtUtils]: Spent 16.46s on a formula simplification that was a NOOP. DAG size: 133 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:43:57,601 WARN L293 SmtUtils]: Spent 11.64s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:44:01,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:44:01,017 INFO L93 Difference]: Finished difference Result 2232 states and 3558 transitions. [2023-12-21 06:44:01,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-12-21 06:44:01,022 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) Word has length 141 [2023-12-21 06:44:01,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:44:01,029 INFO L225 Difference]: With dead ends: 2232 [2023-12-21 06:44:01,029 INFO L226 Difference]: Without dead ends: 2200 [2023-12-21 06:44:01,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4006 ImplicationChecksByTransitivity, 221.0s TimeCoverageRelationStatistics Valid=2784, Invalid=11485, Unknown=11, NotChecked=0, Total=14280 [2023-12-21 06:44:01,031 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 421 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 1843 mSolverCounterSat, 520 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 2372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 1843 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.2s IncrementalHoareTripleChecker+Time [2023-12-21 06:44:01,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1230 Invalid, 2372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 1843 Invalid, 9 Unknown, 0 Unchecked, 61.2s Time] [2023-12-21 06:44:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2200 states. [2023-12-21 06:44:05,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2200 to 2048. [2023-12-21 06:44:05,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2048 states, 1046 states have (on average 1.305927342256214) internal successors, (1366), 1047 states have internal predecessors, (1366), 957 states have call successors, (957), 44 states have call predecessors, (957), 44 states have return successors, (956), 956 states have call predecessors, (956), 956 states have call successors, (956) [2023-12-21 06:44:05,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2048 states to 2048 states and 3279 transitions. [2023-12-21 06:44:05,526 INFO L78 Accepts]: Start accepts. Automaton has 2048 states and 3279 transitions. Word has length 141 [2023-12-21 06:44:05,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:44:05,527 INFO L495 AbstractCegarLoop]: Abstraction has 2048 states and 3279 transitions. [2023-12-21 06:44:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 2.116279069767442) internal successors, (91), 42 states have internal predecessors, (91), 13 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 12 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 06:44:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2048 states and 3279 transitions. [2023-12-21 06:44:05,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-12-21 06:44:05,529 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:44:05,529 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:44:05,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-12-21 06:44:05,734 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 [2023-12-21 06:44:05,734 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:44:05,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:44:05,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1313831839, now seen corresponding path program 7 times [2023-12-21 06:44:05,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:44:05,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831631368] [2023-12-21 06:44:05,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:44:05,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:44:05,742 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:44:05,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1637180823] [2023-12-21 06:44:05,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-12-21 06:44:05,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:44:05,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:44:05,743 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) [2023-12-21 06:44:05,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-12-21 06:44:05,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 06:44:05,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 94 conjunts are in the unsatisfiable core [2023-12-21 06:44:05,833 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:44:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 84 proven. 128 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-12-21 06:44:07,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:44:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 620 backedges. 85 proven. 124 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2023-12-21 06:44:24,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:44:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831631368] [2023-12-21 06:44:24,083 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:44:24,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637180823] [2023-12-21 06:44:24,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637180823] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:44:24,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:44:24,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 50 [2023-12-21 06:44:24,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555394531] [2023-12-21 06:44:24,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:44:24,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-12-21 06:44:24,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:44:24,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-12-21 06:44:24,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=2195, Unknown=2, NotChecked=0, Total=2450 [2023-12-21 06:44:24,085 INFO L87 Difference]: Start difference. First operand 2048 states and 3279 transitions. Second operand has 50 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 15 states have call predecessors, (40), 16 states have call successors, (40) [2023-12-21 06:45:04,529 WARN L293 SmtUtils]: Spent 11.02s on a formula simplification. DAG size of input: 89 DAG size of output: 87 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:45:13,349 WARN L293 SmtUtils]: Spent 6.14s on a formula simplification. DAG size of input: 96 DAG size of output: 90 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:45:14,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:32,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.43s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:33,731 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:35,147 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:40,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:44,199 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:45,814 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:49,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:53,466 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.65s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:56,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.55s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:45:57,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:02,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:06,272 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:08,992 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.72s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:12,361 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:44,000 WARN L293 SmtUtils]: Spent 9.29s on a formula simplification. DAG size of input: 90 DAG size of output: 76 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:46:55,917 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:46:59,927 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:03,928 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:08,373 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:12,943 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:47:53,073 WARN L293 SmtUtils]: Spent 15.02s on a formula simplification. DAG size of input: 89 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:48:02,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:48:09,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 06:48:09,057 INFO L93 Difference]: Finished difference Result 4295 states and 6991 transitions. [2023-12-21 06:48:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-12-21 06:48:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 15 states have call predecessors, (40), 16 states have call successors, (40) Word has length 141 [2023-12-21 06:48:09,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 06:48:09,083 INFO L225 Difference]: With dead ends: 4295 [2023-12-21 06:48:09,083 INFO L226 Difference]: Without dead ends: 3636 [2023-12-21 06:48:09,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4628 ImplicationChecksByTransitivity, 133.9s TimeCoverageRelationStatistics Valid=1924, Invalid=14329, Unknown=3, NotChecked=0, Total=16256 [2023-12-21 06:48:09,090 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 506 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 2820 mSolverCounterSat, 458 mSolverCounterUnsat, 10 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 96.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 2095 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 2820 IncrementalHoareTripleChecker+Invalid, 10 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 96.3s IncrementalHoareTripleChecker+Time [2023-12-21 06:48:09,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 2095 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 2820 Invalid, 10 Unknown, 0 Unchecked, 96.3s Time] [2023-12-21 06:48:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3636 states. [2023-12-21 06:48:15,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3636 to 2727. [2023-12-21 06:48:15,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2727 states, 1396 states have (on average 1.2865329512893984) internal successors, (1796), 1399 states have internal predecessors, (1796), 1283 states have call successors, (1283), 47 states have call predecessors, (1283), 47 states have return successors, (1282), 1280 states have call predecessors, (1282), 1282 states have call successors, (1282) [2023-12-21 06:48:15,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2727 states to 2727 states and 4361 transitions. [2023-12-21 06:48:15,807 INFO L78 Accepts]: Start accepts. Automaton has 2727 states and 4361 transitions. Word has length 141 [2023-12-21 06:48:15,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 06:48:15,807 INFO L495 AbstractCegarLoop]: Abstraction has 2727 states and 4361 transitions. [2023-12-21 06:48:15,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.88) internal successors, (94), 46 states have internal predecessors, (94), 18 states have call successors, (41), 3 states have call predecessors, (41), 3 states have return successors, (40), 15 states have call predecessors, (40), 16 states have call successors, (40) [2023-12-21 06:48:15,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2727 states and 4361 transitions. [2023-12-21 06:48:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2023-12-21 06:48:15,829 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 06:48:15,830 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:48:15,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-12-21 06:48:16,035 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 [2023-12-21 06:48:16,035 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 06:48:16,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 06:48:16,036 INFO L85 PathProgramCache]: Analyzing trace with hash 481845351, now seen corresponding path program 8 times [2023-12-21 06:48:16,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 06:48:16,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158708709] [2023-12-21 06:48:16,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 06:48:16,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 06:48:16,049 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 06:48:16,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311804208] [2023-12-21 06:48:16,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 06:48:16,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 06:48:16,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 06:48:16,051 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) [2023-12-21 06:48:16,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-12-21 06:48:16,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 06:48:16,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 06:48:16,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 129 conjunts are in the unsatisfiable core [2023-12-21 06:48:16,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 06:48:18,067 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 76 proven. 120 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2023-12-21 06:48:18,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 06:48:27,865 INFO L134 CoverageAnalysis]: Checked inductivity of 643 backedges. 70 proven. 114 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2023-12-21 06:48:27,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 06:48:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158708709] [2023-12-21 06:48:27,865 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 06:48:27,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311804208] [2023-12-21 06:48:27,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311804208] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 06:48:27,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 06:48:27,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25] total 51 [2023-12-21 06:48:27,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308232021] [2023-12-21 06:48:27,866 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 06:48:27,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-12-21 06:48:27,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 06:48:27,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-12-21 06:48:27,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=2097, Unknown=0, NotChecked=0, Total=2550 [2023-12-21 06:48:27,867 INFO L87 Difference]: Start difference. First operand 2727 states and 4361 transitions. Second operand has 51 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 48 states have internal predecessors, (101), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39) [2023-12-21 06:48:33,594 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.63s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:48:50,914 WARN L293 SmtUtils]: Spent 14.63s on a formula simplification that was a NOOP. DAG size: 208 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:49:12,768 WARN L293 SmtUtils]: Spent 20.37s on a formula simplification that was a NOOP. DAG size: 215 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 06:49:17,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:20,072 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:25,648 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:30,445 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:34,447 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:44,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] Received shutdown request... [2023-12-21 06:49:45,264 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 06:49:45,264 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-12-21 06:49:45,817 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 06:49:45,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-12-21 06:49:45,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1251 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=988, Invalid=4268, Unknown=0, NotChecked=0, Total=5256 [2023-12-21 06:49:45,824 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 236 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 172 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.9s IncrementalHoareTripleChecker+Time [2023-12-21 06:49:45,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 711 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 877 Invalid, 5 Unknown, 0 Unchecked, 31.9s Time] [2023-12-21 06:49:45,825 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 06:49:45,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-12-21 06:49:46,025 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 [2023-12-21 06:49:46,026 WARN L619 AbstractCegarLoop]: Verification canceled: while NwaCegarLoop was constructing difference of abstraction (2727states) and FLOYD_HOARE automaton (currently 32 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. [2023-12-21 06:49:46,029 INFO L445 BasicCegarLoop]: Path program histogram: [8, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 06:49:46,031 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2023-12-21 06:49:46,034 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 06:49:46 BoogieIcfgContainer [2023-12-21 06:49:46,034 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-12-21 06:49:46,039 INFO L158 Benchmark]: Toolchain (without parser) took 876159.14ms. Allocated memory was 302.0MB in the beginning and 1.1GB in the end (delta: 785.4MB). Free memory was 252.7MB in the beginning and 631.4MB in the end (delta: -378.7MB). Peak memory consumption was 408.3MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,039 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 155.9MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 06:49:46,039 INFO L158 Benchmark]: CACSL2BoogieTranslator took 184.60ms. Allocated memory is still 302.0MB. Free memory was 252.7MB in the beginning and 241.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,039 INFO L158 Benchmark]: Boogie Procedure Inliner took 33.93ms. Allocated memory is still 302.0MB. Free memory was 241.1MB in the beginning and 239.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,039 INFO L158 Benchmark]: Boogie Preprocessor took 40.52ms. Allocated memory is still 302.0MB. Free memory was 239.5MB in the beginning and 237.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,039 INFO L158 Benchmark]: RCFGBuilder took 289.96ms. Allocated memory is still 302.0MB. Free memory was 237.7MB in the beginning and 225.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,040 INFO L158 Benchmark]: TraceAbstraction took 875606.17ms. Allocated memory was 302.0MB in the beginning and 1.1GB in the end (delta: 785.4MB). Free memory was 224.4MB in the beginning and 631.4MB in the end (delta: -407.0MB). Peak memory consumption was 380.0MB. Max. memory is 8.0GB. [2023-12-21 06:49:46,040 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 203.4MB. Free memory is still 155.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 184.60ms. Allocated memory is still 302.0MB. Free memory was 252.7MB in the beginning and 241.1MB in the end (delta: 11.6MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 33.93ms. Allocated memory is still 302.0MB. Free memory was 241.1MB in the beginning and 239.5MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.52ms. Allocated memory is still 302.0MB. Free memory was 239.5MB in the beginning and 237.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 289.96ms. Allocated memory is still 302.0MB. Free memory was 237.7MB in the beginning and 225.1MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 875606.17ms. Allocated memory was 302.0MB in the beginning and 1.1GB in the end (delta: 785.4MB). Free memory was 224.4MB in the beginning and 631.4MB in the end (delta: -407.0MB). Peak memory consumption was 380.0MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 13]: Timeout (TraceAbstraction) Unable to prove that a call to reach_error is unreachable (line 13). Cancelled while NwaCegarLoop was constructing difference of abstraction (2727states) and FLOYD_HOARE automaton (currently 32 states, 51 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 73 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 875.6s, OverallIterations: 28, TraceHistogramMax: 17, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.1s, AutomataDifference: 746.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 30 mSolverCounterUnknown, 4200 SdHoareTripleChecker+Valid, 255.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 4096 mSDsluCounter, 14829 SdHoareTripleChecker+Invalid, 253.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 13569 mSDsCounter, 3598 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 18163 IncrementalHoareTripleChecker+Invalid, 21791 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 3598 mSolverCounterUnsat, 1260 mSDtfsCounter, 18163 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4819 GetRequests, 3504 SyntacticMatches, 18 SemanticMatches, 1296 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 28367 ImplicationChecksByTransitivity, 510.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2727occurred in iteration=27, InterpolantAutomatonStates: 877, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 30.4s AutomataMinimizationTime, 27 MinimizatonAttempts, 4075 StatesRemovedByMinimization, 26 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 90.0s InterpolantComputationTime, 2361 NumberOfCodeBlocks, 2255 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 3919 ConstructedInterpolants, 24 QuantifiedInterpolants, 43904 SizeOfPredicates, 163 NumberOfNonLiveVariables, 5565 ConjunctsInSsa, 1247 ConjunctsInUnsatCore, 46 InterpolantComputations, 8 PerfectInterpolantSequences, 9940/11711 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown