/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/cohencu-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.4-tmp.fs.bitabs-eval-d9c3e40-m [2023-12-21 05:24:06,641 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-12-21 05:24:06,683 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 05:24:06,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-12-21 05:24:06,686 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-12-21 05:24:06,700 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-12-21 05:24:06,701 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-12-21 05:24:06,701 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-12-21 05:24:06,701 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-12-21 05:24:06,702 INFO L153 SettingsManager]: * Use memory slicer=true [2023-12-21 05:24:06,702 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-12-21 05:24:06,702 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-12-21 05:24:06,703 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-12-21 05:24:06,703 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-12-21 05:24:06,703 INFO L153 SettingsManager]: * Use SBE=true [2023-12-21 05:24:06,703 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-12-21 05:24:06,704 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-12-21 05:24:06,704 INFO L153 SettingsManager]: * sizeof long=4 [2023-12-21 05:24:06,704 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-12-21 05:24:06,704 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-12-21 05:24:06,705 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-12-21 05:24:06,709 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-12-21 05:24:06,709 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-12-21 05:24:06,710 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-12-21 05:24:06,710 INFO L153 SettingsManager]: * Allow undefined functions=false [2023-12-21 05:24:06,710 INFO L153 SettingsManager]: * sizeof long double=12 [2023-12-21 05:24:06,710 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-12-21 05:24:06,710 INFO L153 SettingsManager]: * Use constant arrays=true [2023-12-21 05:24:06,710 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 05:24:06,711 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-12-21 05:24:06,711 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-12-21 05:24:06,712 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-12-21 05:24:06,712 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-12-21 05:24:06,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-12-21 05:24:06,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-12-21 05:24:06,712 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-12-21 05:24:06,716 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-12-21 05:24:06,716 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-12-21 05:24:06,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Use bitabs translation -> false [2023-12-21 05:24:06,931 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-12-21 05:24:06,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-12-21 05:24:06,951 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-12-21 05:24:06,952 INFO L270 PluginConnector]: Initializing CDTParser... [2023-12-21 05:24:06,953 INFO L274 PluginConnector]: CDTParser initialized [2023-12-21 05:24:06,954 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2023-12-21 05:24:08,038 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-12-21 05:24:08,182 INFO L384 CDTParser]: Found 1 translation units. [2023-12-21 05:24:08,183 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/cohencu-ll.c [2023-12-21 05:24:08,188 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b28f12c7/b9693f94e1164c47b20c0e6a2c1feef2/FLAG360cdf040 [2023-12-21 05:24:08,196 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6b28f12c7/b9693f94e1164c47b20c0e6a2c1feef2 [2023-12-21 05:24:08,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-12-21 05:24:08,199 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-12-21 05:24:08,200 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-12-21 05:24:08,200 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-12-21 05:24:08,203 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-12-21 05:24:08,203 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,204 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49645cff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08, skipping insertion in model container [2023-12-21 05:24:08,204 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,219 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-12-21 05:24:08,307 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/cohencu-ll.c[588,601] [2023-12-21 05:24:08,320 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 05:24:08,328 INFO L202 MainTranslator]: Completed pre-run [2023-12-21 05:24:08,336 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/cohencu-ll.c[588,601] [2023-12-21 05:24:08,343 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-12-21 05:24:08,352 INFO L206 MainTranslator]: Completed translation [2023-12-21 05:24:08,352 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08 WrapperNode [2023-12-21 05:24:08,353 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-12-21 05:24:08,353 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-12-21 05:24:08,353 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-12-21 05:24:08,353 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-12-21 05:24:08,358 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,361 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,372 INFO L138 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 44 [2023-12-21 05:24:08,372 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-12-21 05:24:08,373 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-12-21 05:24:08,373 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-12-21 05:24:08,373 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-12-21 05:24:08,380 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,380 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,381 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,388 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 05:24:08,388 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,388 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,390 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,391 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,393 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-12-21 05:24:08,394 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-12-21 05:24:08,394 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-12-21 05:24:08,394 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-12-21 05:24:08,394 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (1/1) ... [2023-12-21 05:24:08,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-12-21 05:24:08,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:08,462 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 05:24:08,484 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 05:24:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-12-21 05:24:08,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-12-21 05:24:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-12-21 05:24:08,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-12-21 05:24:08,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-12-21 05:24:08,487 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-12-21 05:24:08,527 INFO L241 CfgBuilder]: Building ICFG [2023-12-21 05:24:08,528 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-12-21 05:24:08,628 INFO L282 CfgBuilder]: Performing block encoding [2023-12-21 05:24:08,655 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-12-21 05:24:08,655 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-12-21 05:24:08,655 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:24:08 BoogieIcfgContainer [2023-12-21 05:24:08,656 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-12-21 05:24:08,657 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-12-21 05:24:08,657 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-12-21 05:24:08,660 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-12-21 05:24:08,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 05:24:08" (1/3) ... [2023-12-21 05:24:08,660 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc8320a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:24:08, skipping insertion in model container [2023-12-21 05:24:08,660 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 05:24:08" (2/3) ... [2023-12-21 05:24:08,661 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cc8320a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 05:24:08, skipping insertion in model container [2023-12-21 05:24:08,661 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 05:24:08" (3/3) ... [2023-12-21 05:24:08,661 INFO L112 eAbstractionObserver]: Analyzing ICFG cohencu-ll.c [2023-12-21 05:24:08,673 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-12-21 05:24:08,673 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-12-21 05:24:08,705 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-12-21 05:24:08,711 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;@34c906e1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-12-21 05:24:08,711 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-12-21 05:24:08,714 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-12-21 05:24:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 05:24:08,731 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:08,732 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 05:24:08,732 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:08,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:08,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1409108064, now seen corresponding path program 1 times [2023-12-21 05:24:08,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:08,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318311853] [2023-12-21 05:24:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:08,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:08,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:24:08,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:08,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318311853] [2023-12-21 05:24:08,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318311853] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 05:24:08,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 05:24:08,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-12-21 05:24:08,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095398493] [2023-12-21 05:24:08,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 05:24:08,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-12-21 05:24:08,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:08,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-12-21 05:24:08,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-12-21 05:24:08,896 INFO L87 Difference]: Start difference. First operand has 22 states, 8 states have (on average 1.625) internal successors, (13), 9 states have internal predecessors, (13), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:24:08,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:08,923 INFO L93 Difference]: Finished difference Result 43 states and 80 transitions. [2023-12-21 05:24:08,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-12-21 05:24:08,925 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-21 05:24:08,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:08,932 INFO L225 Difference]: With dead ends: 43 [2023-12-21 05:24:08,932 INFO L226 Difference]: Without dead ends: 20 [2023-12-21 05:24:08,935 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 05:24:08,937 INFO L413 NwaCegarLoop]: 30 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, 30 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 05:24:08,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 30 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-12-21 05:24:08,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-12-21 05:24:08,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-12-21 05:24:08,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 05:24:08,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 30 transitions. [2023-12-21 05:24:08,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 30 transitions. Word has length 6 [2023-12-21 05:24:08,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:08,967 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 30 transitions. [2023-12-21 05:24:08,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:24:08,967 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 30 transitions. [2023-12-21 05:24:08,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-12-21 05:24:08,968 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:08,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-12-21 05:24:08,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-12-21 05:24:08,968 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:08,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1420488226, now seen corresponding path program 1 times [2023-12-21 05:24:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998950238] [2023-12-21 05:24:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:08,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:08,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:09,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:24:09,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:09,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998950238] [2023-12-21 05:24:09,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998950238] provided 1 perfect and 0 imperfect interpolant sequences [2023-12-21 05:24:09,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-12-21 05:24:09,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-12-21 05:24:09,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843916859] [2023-12-21 05:24:09,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-12-21 05:24:09,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-12-21 05:24:09,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:09,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-12-21 05:24:09,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-12-21 05:24:09,210 INFO L87 Difference]: Start difference. First operand 20 states and 30 transitions. Second operand has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:24:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:09,278 INFO L93 Difference]: Finished difference Result 26 states and 35 transitions. [2023-12-21 05:24:09,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-12-21 05:24:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-12-21 05:24:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:09,279 INFO L225 Difference]: With dead ends: 26 [2023-12-21 05:24:09,280 INFO L226 Difference]: Without dead ends: 24 [2023-12-21 05:24:09,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-12-21 05:24:09,281 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:09,281 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 71 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 05:24:09,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-12-21 05:24:09,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-12-21 05:24:09,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2023-12-21 05:24:09,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2023-12-21 05:24:09,289 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 6 [2023-12-21 05:24:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:09,289 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2023-12-21 05:24:09,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.0) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:24:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2023-12-21 05:24:09,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-12-21 05:24:09,290 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:09,290 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:09,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-12-21 05:24:09,290 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:09,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:09,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1296730394, now seen corresponding path program 1 times [2023-12-21 05:24:09,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:09,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871293096] [2023-12-21 05:24:09,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:09,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:09,310 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:09,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318947727] [2023-12-21 05:24:09,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:09,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:09,330 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 05:24:09,372 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 05:24:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:09,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 05:24:09,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:09,514 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:24:09,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:09,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-12-21 05:24:09,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871293096] [2023-12-21 05:24:09,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:09,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318947727] [2023-12-21 05:24:09,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318947727] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:09,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:09,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 05:24:09,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133010757] [2023-12-21 05:24:09,643 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:09,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 05:24:09,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:09,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 05:24:09,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 05:24:09,645 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 05:24:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:09,826 INFO L93 Difference]: Finished difference Result 49 states and 68 transitions. [2023-12-21 05:24:09,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 05:24:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2023-12-21 05:24:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:09,829 INFO L225 Difference]: With dead ends: 49 [2023-12-21 05:24:09,829 INFO L226 Difference]: Without dead ends: 47 [2023-12-21 05:24:09,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:09,830 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:09,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 74 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 05:24:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-12-21 05:24:09,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2023-12-21 05:24:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 21 states have call successors, (21), 4 states have call predecessors, (21), 4 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-21 05:24:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2023-12-21 05:24:09,847 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 11 [2023-12-21 05:24:09,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:09,847 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2023-12-21 05:24:09,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.4) internal successors, (14), 8 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-12-21 05:24:09,847 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2023-12-21 05:24:09,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-12-21 05:24:09,848 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:09,848 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:09,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-12-21 05:24:10,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:10,053 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:10,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:10,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1366290786, now seen corresponding path program 1 times [2023-12-21 05:24:10,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:10,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018313747] [2023-12-21 05:24:10,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:10,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:10,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:10,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1872235076] [2023-12-21 05:24:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:10,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:10,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:10,080 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 05:24:10,081 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 05:24:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:10,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 17 conjunts are in the unsatisfiable core [2023-12-21 05:24:10,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:10,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 05:24:10,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:10,291 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-12-21 05:24:10,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:10,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018313747] [2023-12-21 05:24:10,291 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:10,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872235076] [2023-12-21 05:24:10,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872235076] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:10,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:10,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 05:24:10,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468454298] [2023-12-21 05:24:10,298 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:10,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 05:24:10,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:10,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 05:24:10,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 05:24:10,301 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 05:24:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:10,478 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2023-12-21 05:24:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 05:24:10,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 16 [2023-12-21 05:24:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:10,481 INFO L225 Difference]: With dead ends: 51 [2023-12-21 05:24:10,482 INFO L226 Difference]: Without dead ends: 49 [2023-12-21 05:24:10,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:10,484 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 16 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:10,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 75 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-12-21 05:24:10,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-12-21 05:24:10,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-12-21 05:24:10,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 21 states have call successors, (21), 5 states have call predecessors, (21), 5 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2023-12-21 05:24:10,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2023-12-21 05:24:10,507 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 16 [2023-12-21 05:24:10,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:10,508 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2023-12-21 05:24:10,508 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2023-12-21 05:24:10,508 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2023-12-21 05:24:10,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-12-21 05:24:10,509 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:10,509 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:10,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-12-21 05:24:10,714 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,SelfDestructingSolverStorable3 [2023-12-21 05:24:10,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:10,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:10,715 INFO L85 PathProgramCache]: Analyzing trace with hash -254500442, now seen corresponding path program 1 times [2023-12-21 05:24:10,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931577017] [2023-12-21 05:24:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:10,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:10,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [61824270] [2023-12-21 05:24:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:10,722 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 05:24:10,736 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 05:24:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:10,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 19 conjunts are in the unsatisfiable core [2023-12-21 05:24:10,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 05:24:10,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:10,909 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-12-21 05:24:10,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:10,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931577017] [2023-12-21 05:24:10,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61824270] [2023-12-21 05:24:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61824270] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:10,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:10,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 05:24:10,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269875412] [2023-12-21 05:24:10,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:10,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 05:24:10,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:10,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 05:24:10,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-12-21 05:24:10,912 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 05:24:11,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:11,156 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-12-21 05:24:11,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-12-21 05:24:11,157 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) Word has length 21 [2023-12-21 05:24:11,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:11,157 INFO L225 Difference]: With dead ends: 64 [2023-12-21 05:24:11,157 INFO L226 Difference]: Without dead ends: 55 [2023-12-21 05:24:11,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:11,158 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:11,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 05:24:11,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-12-21 05:24:11,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2023-12-21 05:24:11,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 30 states have internal predecessors, (30), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2023-12-21 05:24:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-12-21 05:24:11,199 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 21 [2023-12-21 05:24:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:11,203 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-12-21 05:24:11,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 2 states have call predecessors, (6), 4 states have call successors, (6) [2023-12-21 05:24:11,203 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-12-21 05:24:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-12-21 05:24:11,204 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:11,204 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:11,211 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-12-21 05:24:11,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:11,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:11,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:11,409 INFO L85 PathProgramCache]: Analyzing trace with hash 868300998, now seen corresponding path program 1 times [2023-12-21 05:24:11,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:11,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902590195] [2023-12-21 05:24:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:11,422 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:11,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2117026071] [2023-12-21 05:24:11,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:11,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:11,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:11,441 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 05:24:11,450 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 05:24:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:11,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 05:24:11,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:11,591 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 05:24:11,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 13 proven. 23 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-12-21 05:24:11,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902590195] [2023-12-21 05:24:11,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:11,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117026071] [2023-12-21 05:24:11,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117026071] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:11,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:11,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-12-21 05:24:11,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117106924] [2023-12-21 05:24:11,696 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:11,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 05:24:11,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:11,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 05:24:11,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:11,697 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-21 05:24:15,889 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 05:24:15,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:15,945 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-12-21 05:24:15,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 05:24:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) Word has length 43 [2023-12-21 05:24:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:15,946 INFO L225 Difference]: With dead ends: 79 [2023-12-21 05:24:15,946 INFO L226 Difference]: Without dead ends: 77 [2023-12-21 05:24:15,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-12-21 05:24:15,947 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 19 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:15,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 137 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 187 Invalid, 1 Unknown, 0 Unchecked, 4.2s Time] [2023-12-21 05:24:15,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-12-21 05:24:15,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-12-21 05:24:15,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 42 states have internal predecessors, (42), 26 states have call successors, (26), 10 states have call predecessors, (26), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2023-12-21 05:24:15,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2023-12-21 05:24:15,969 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 43 [2023-12-21 05:24:15,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:15,969 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2023-12-21 05:24:15,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 6 states have call successors, (16), 3 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 6 states have call successors, (14) [2023-12-21 05:24:15,970 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2023-12-21 05:24:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-12-21 05:24:15,971 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:15,971 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2023-12-21 05:24:15,978 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 05:24:16,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:16,176 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:16,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:16,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1539808378, now seen corresponding path program 2 times [2023-12-21 05:24:16,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:16,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144943666] [2023-12-21 05:24:16,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:16,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:16,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:16,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757835505] [2023-12-21 05:24:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 05:24:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:16,185 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 05:24:16,211 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 05:24:16,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 05:24:16,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:24:16,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 23 conjunts are in the unsatisfiable core [2023-12-21 05:24:16,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 17 proven. 31 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-12-21 05:24:16,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:16,523 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 19 proven. 25 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2023-12-21 05:24:16,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144943666] [2023-12-21 05:24:16,524 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:16,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757835505] [2023-12-21 05:24:16,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757835505] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:16,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:16,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2023-12-21 05:24:16,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489305303] [2023-12-21 05:24:16,525 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:16,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-12-21 05:24:16,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:16,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-12-21 05:24:16,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2023-12-21 05:24:16,526 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-21 05:24:16,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:16,813 INFO L93 Difference]: Finished difference Result 83 states and 99 transitions. [2023-12-21 05:24:16,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-12-21 05:24:16,813 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 53 [2023-12-21 05:24:16,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:16,816 INFO L225 Difference]: With dead ends: 83 [2023-12-21 05:24:16,816 INFO L226 Difference]: Without dead ends: 78 [2023-12-21 05:24:16,816 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:16,817 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 17 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:16,817 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 119 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 05:24:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-12-21 05:24:16,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2023-12-21 05:24:16,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 45 states have internal predecessors, (45), 24 states have call successors, (24), 11 states have call predecessors, (24), 11 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-21 05:24:16,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2023-12-21 05:24:16,844 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 53 [2023-12-21 05:24:16,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:16,845 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2023-12-21 05:24:16,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2023-12-21 05:24:16,845 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2023-12-21 05:24:16,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-12-21 05:24:16,847 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:16,847 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:16,865 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 05:24:17,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:17,055 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:17,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:17,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2050291499, now seen corresponding path program 1 times [2023-12-21 05:24:17,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:17,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654234512] [2023-12-21 05:24:17,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:17,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:17,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:17,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1798765568] [2023-12-21 05:24:17,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:17,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:17,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:17,094 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 05:24:17,131 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 05:24:17,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:17,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2023-12-21 05:24:17,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 21 proven. 38 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-21 05:24:17,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:17,556 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 23 proven. 36 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2023-12-21 05:24:17,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654234512] [2023-12-21 05:24:17,557 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:17,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798765568] [2023-12-21 05:24:17,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798765568] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:17,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:17,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2023-12-21 05:24:17,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777601425] [2023-12-21 05:24:17,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:17,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-12-21 05:24:17,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:17,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-12-21 05:24:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2023-12-21 05:24:17,558 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-21 05:24:17,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:17,866 INFO L93 Difference]: Finished difference Result 84 states and 96 transitions. [2023-12-21 05:24:17,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-12-21 05:24:17,866 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) Word has length 64 [2023-12-21 05:24:17,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:17,867 INFO L225 Difference]: With dead ends: 84 [2023-12-21 05:24:17,867 INFO L226 Difference]: Without dead ends: 82 [2023-12-21 05:24:17,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-12-21 05:24:17,868 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 16 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:17,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 166 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 05:24:17,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-12-21 05:24:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2023-12-21 05:24:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 48 states have internal predecessors, (48), 24 states have call successors, (24), 12 states have call predecessors, (24), 12 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2023-12-21 05:24:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2023-12-21 05:24:17,897 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 64 [2023-12-21 05:24:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:17,897 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2023-12-21 05:24:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 12 states have internal predecessors, (23), 7 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 6 states have call predecessors, (22), 7 states have call successors, (22) [2023-12-21 05:24:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2023-12-21 05:24:17,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-12-21 05:24:17,901 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:17,901 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:17,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-12-21 05:24:18,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:18,107 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:18,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:18,107 INFO L85 PathProgramCache]: Analyzing trace with hash -2018193201, now seen corresponding path program 1 times [2023-12-21 05:24:18,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:18,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587687266] [2023-12-21 05:24:18,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:18,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:18,118 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:18,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747902094] [2023-12-21 05:24:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:18,119 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 05:24:18,149 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 05:24:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:18,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 26 conjunts are in the unsatisfiable core [2023-12-21 05:24:18,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:18,393 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-21 05:24:18,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2023-12-21 05:24:18,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587687266] [2023-12-21 05:24:18,572 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:18,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747902094] [2023-12-21 05:24:18,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747902094] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:18,572 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:18,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-12-21 05:24:18,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235852504] [2023-12-21 05:24:18,572 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:18,574 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-12-21 05:24:18,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:18,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-12-21 05:24:18,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2023-12-21 05:24:18,574 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-12-21 05:24:18,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:18,993 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2023-12-21 05:24:18,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 05:24:18,994 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) Word has length 69 [2023-12-21 05:24:18,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:18,994 INFO L225 Difference]: With dead ends: 110 [2023-12-21 05:24:18,994 INFO L226 Difference]: Without dead ends: 101 [2023-12-21 05:24:18,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-12-21 05:24:18,995 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:18,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 145 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-12-21 05:24:18,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-12-21 05:24:19,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2023-12-21 05:24:19,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 56 states have internal predecessors, (58), 32 states have call successors, (32), 14 states have call predecessors, (32), 14 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-21 05:24:19,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 121 transitions. [2023-12-21 05:24:19,017 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 121 transitions. Word has length 69 [2023-12-21 05:24:19,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:19,018 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 121 transitions. [2023-12-21 05:24:19,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 7 states have call successors, (26), 3 states have call predecessors, (26), 2 states have return successors, (24), 6 states have call predecessors, (24), 7 states have call successors, (24) [2023-12-21 05:24:19,018 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 121 transitions. [2023-12-21 05:24:19,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-12-21 05:24:19,018 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:19,018 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2023-12-21 05:24:19,023 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 05:24:19,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:19,223 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:19,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:19,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2117199194, now seen corresponding path program 3 times [2023-12-21 05:24:19,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:19,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765348679] [2023-12-21 05:24:19,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:19,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:19,235 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:19,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460330421] [2023-12-21 05:24:19,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-12-21 05:24:19,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:19,236 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 05:24:19,238 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 05:24:19,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-12-21 05:24:19,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:24:19,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 35 conjunts are in the unsatisfiable core [2023-12-21 05:24:19,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:19,426 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 05:24:19,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 55 proven. 24 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-12-21 05:24:21,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:21,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765348679] [2023-12-21 05:24:21,040 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:21,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460330421] [2023-12-21 05:24:21,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460330421] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:21,040 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:21,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2023-12-21 05:24:21,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937812915] [2023-12-21 05:24:21,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-12-21 05:24:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-12-21 05:24:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-12-21 05:24:21,042 INFO L87 Difference]: Start difference. First operand 101 states and 121 transitions. Second operand has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-21 05:24:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:24:22,149 INFO L93 Difference]: Finished difference Result 123 states and 142 transitions. [2023-12-21 05:24:22,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-12-21 05:24:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) Word has length 75 [2023-12-21 05:24:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:24:22,165 INFO L225 Difference]: With dead ends: 123 [2023-12-21 05:24:22,165 INFO L226 Difference]: Without dead ends: 117 [2023-12-21 05:24:22,167 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-12-21 05:24:22,168 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 21 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-12-21 05:24:22,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 175 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-12-21 05:24:22,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-12-21 05:24:22,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2023-12-21 05:24:22,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 68 states have internal predecessors, (69), 32 states have call successors, (32), 18 states have call predecessors, (32), 18 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2023-12-21 05:24:22,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 132 transitions. [2023-12-21 05:24:22,212 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 132 transitions. Word has length 75 [2023-12-21 05:24:22,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:24:22,212 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 132 transitions. [2023-12-21 05:24:22,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 8 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 6 states have call predecessors, (26), 8 states have call successors, (26) [2023-12-21 05:24:22,212 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 132 transitions. [2023-12-21 05:24:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-12-21 05:24:22,216 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:24:22,216 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:24:22,225 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 05:24:22,421 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,SelfDestructingSolverStorable9 [2023-12-21 05:24:22,421 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:24:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:24:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash 638071765, now seen corresponding path program 1 times [2023-12-21 05:24:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:24:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596935387] [2023-12-21 05:24:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:24:22,427 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:24:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505364021] [2023-12-21 05:24:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:24:22,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:24:22,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:24:22,428 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 05:24:22,456 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 05:24:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-12-21 05:24:22,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 49 conjunts are in the unsatisfiable core [2023-12-21 05:24:22,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:24:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 104 proven. 110 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-12-21 05:24:22,797 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:24:28,450 WARN L293 SmtUtils]: Spent 5.14s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:24:47,497 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 104 proven. 110 refuted. 0 times theorem prover too weak. 886 trivial. 0 not checked. [2023-12-21 05:24:47,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:24:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596935387] [2023-12-21 05:24:47,498 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:24:47,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505364021] [2023-12-21 05:24:47,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505364021] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:24:47,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:24:47,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-12-21 05:24:47,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724611284] [2023-12-21 05:24:47,498 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:24:47,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-12-21 05:24:47,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:24:47,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-12-21 05:24:47,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=327, Unknown=1, NotChecked=0, Total=420 [2023-12-21 05:24:47,500 INFO L87 Difference]: Start difference. First operand 117 states and 132 transitions. Second operand has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 13 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2023-12-21 05:25:15,225 WARN L293 SmtUtils]: Spent 25.48s on a formula simplification that was a NOOP. DAG size: 92 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:25:19,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.13s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:23,866 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:29,371 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.50s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:41,946 WARN L539 Checker$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 05:25:46,356 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:50,385 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:55,432 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:25:57,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:26:13,053 WARN L293 SmtUtils]: Spent 9.98s on a formula simplification that was a NOOP. DAG size: 97 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:26:31,020 WARN L293 SmtUtils]: Spent 13.54s on a formula simplification that was a NOOP. DAG size: 94 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:26:35,032 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:26:39,042 WARN L539 Checker$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 05:26:46,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:01,899 WARN L293 SmtUtils]: Spent 10.26s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:27:17,553 WARN L539 Checker$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 05:27:21,633 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:25,741 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:42,407 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:46,419 WARN L539 Checker$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 05:27:50,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:55,087 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.61s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:27:59,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:28:03,396 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:28:07,419 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:28:11,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:28:11,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:28:11,647 INFO L93 Difference]: Finished difference Result 178 states and 224 transitions. [2023-12-21 05:28:11,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-12-21 05:28:11,647 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 13 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) Word has length 128 [2023-12-21 05:28:11,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:28:11,649 INFO L225 Difference]: With dead ends: 178 [2023-12-21 05:28:11,649 INFO L226 Difference]: Without dead ends: 157 [2023-12-21 05:28:11,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 122.0s TimeCoverageRelationStatistics Valid=245, Invalid=740, Unknown=7, NotChecked=0, Total=992 [2023-12-21 05:28:11,650 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 25 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 75 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 93.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.9s IncrementalHoareTripleChecker+Time [2023-12-21 05:28:11,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 299 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 346 Invalid, 21 Unknown, 0 Unchecked, 93.9s Time] [2023-12-21 05:28:11,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-12-21 05:28:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 149. [2023-12-21 05:28:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 77 states have (on average 1.077922077922078) internal successors, (83), 79 states have internal predecessors, (83), 52 states have call successors, (52), 19 states have call predecessors, (52), 19 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2023-12-21 05:28:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 185 transitions. [2023-12-21 05:28:11,701 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 185 transitions. Word has length 128 [2023-12-21 05:28:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:28:11,701 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 185 transitions. [2023-12-21 05:28:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 13 states have call successors, (48), 3 states have call predecessors, (48), 2 states have return successors, (46), 12 states have call predecessors, (46), 13 states have call successors, (46) [2023-12-21 05:28:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 185 transitions. [2023-12-21 05:28:11,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-12-21 05:28:11,702 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:28:11,703 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:28:11,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-12-21 05:28:11,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:28:11,905 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:28:11,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:28:11,905 INFO L85 PathProgramCache]: Analyzing trace with hash 2081330855, now seen corresponding path program 2 times [2023-12-21 05:28:11,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:28:11,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404737551] [2023-12-21 05:28:11,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:28:11,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:28:11,920 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:28:11,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1050429452] [2023-12-21 05:28:11,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 05:28:11,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:28:11,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:28:11,924 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 05:28:11,925 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 05:28:12,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 05:28:12,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:28:12,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 47 conjunts are in the unsatisfiable core [2023-12-21 05:28:12,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:28:12,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 128 proven. 74 refuted. 0 times theorem prover too weak. 1326 trivial. 0 not checked. [2023-12-21 05:28:12,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:28:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 128 proven. 32 refuted. 0 times theorem prover too weak. 1368 trivial. 0 not checked. [2023-12-21 05:28:12,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:28:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404737551] [2023-12-21 05:28:12,854 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:28:12,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050429452] [2023-12-21 05:28:12,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050429452] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:28:12,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:28:12,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 19 [2023-12-21 05:28:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760319452] [2023-12-21 05:28:12,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:28:12,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-12-21 05:28:12,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:28:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-12-21 05:28:12,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2023-12-21 05:28:12,855 INFO L87 Difference]: Start difference. First operand 149 states and 185 transitions. Second operand has 19 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 05:28:13,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:28:13,451 INFO L93 Difference]: Finished difference Result 174 states and 207 transitions. [2023-12-21 05:28:13,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-12-21 05:28:13,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) Word has length 150 [2023-12-21 05:28:13,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:28:13,453 INFO L225 Difference]: With dead ends: 174 [2023-12-21 05:28:13,453 INFO L226 Difference]: Without dead ends: 160 [2023-12-21 05:28:13,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 278 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2023-12-21 05:28:13,454 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 14 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-12-21 05:28:13,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 308 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-12-21 05:28:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-12-21 05:28:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2023-12-21 05:28:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 49 states have call successors, (49), 23 states have call predecessors, (49), 22 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-12-21 05:28:13,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 186 transitions. [2023-12-21 05:28:13,508 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 186 transitions. Word has length 150 [2023-12-21 05:28:13,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:28:13,509 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 186 transitions. [2023-12-21 05:28:13,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 15 states have (on average 2.0) internal successors, (30), 16 states have internal predecessors, (30), 11 states have call successors, (41), 3 states have call predecessors, (41), 2 states have return successors, (39), 9 states have call predecessors, (39), 11 states have call successors, (39) [2023-12-21 05:28:13,509 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 186 transitions. [2023-12-21 05:28:13,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2023-12-21 05:28:13,511 INFO L187 NwaCegarLoop]: Found error trace [2023-12-21 05:28:13,511 INFO L195 NwaCegarLoop]: trace histogram [49, 48, 48, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-12-21 05:28:13,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-12-21 05:28:13,717 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,SelfDestructingSolverStorable11 [2023-12-21 05:28:13,717 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-12-21 05:28:13,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-12-21 05:28:13,717 INFO L85 PathProgramCache]: Analyzing trace with hash 310960125, now seen corresponding path program 2 times [2023-12-21 05:28:13,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-12-21 05:28:13,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106163869] [2023-12-21 05:28:13,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-12-21 05:28:13,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-12-21 05:28:13,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-12-21 05:28:13,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675290458] [2023-12-21 05:28:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-12-21 05:28:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-12-21 05:28:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-12-21 05:28:13,728 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 05:28:13,735 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 05:28:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-12-21 05:28:13,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-12-21 05:28:13,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 87 conjunts are in the unsatisfiable core [2023-12-21 05:28:13,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-12-21 05:28:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 230 proven. 259 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-12-21 05:28:14,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-12-21 05:29:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4860 backedges. 230 proven. 252 refuted. 7 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-12-21 05:29:28,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-12-21 05:29:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106163869] [2023-12-21 05:29:28,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-12-21 05:29:28,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675290458] [2023-12-21 05:29:28,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675290458] provided 0 perfect and 2 imperfect interpolant sequences [2023-12-21 05:29:28,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-12-21 05:29:28,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2023-12-21 05:29:28,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945169141] [2023-12-21 05:29:28,179 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-12-21 05:29:28,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-12-21 05:29:28,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-12-21 05:29:28,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-12-21 05:29:28,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=587, Unknown=9, NotChecked=0, Total=756 [2023-12-21 05:29:28,180 INFO L87 Difference]: Start difference. First operand 160 states and 186 transitions. Second operand has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 20 states have call predecessors, (96), 20 states have call successors, (96) [2023-12-21 05:30:19,984 WARN L293 SmtUtils]: Spent 50.73s on a formula simplification. DAG size of input: 158 DAG size of output: 112 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:30:24,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:30:29,214 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.91s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:31:34,857 WARN L293 SmtUtils]: Spent 1.03m on a formula simplification. DAG size of input: 142 DAG size of output: 126 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-12-21 05:31:43,001 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:31:49,060 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 6.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:31:53,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:31:57,315 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:32:01,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:32:05,341 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:32:09,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-12-21 05:32:13,398 WARN L539 Checker$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 05:32:17,401 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 05:32:17,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-12-21 05:32:17,406 INFO L93 Difference]: Finished difference Result 193 states and 224 transitions. [2023-12-21 05:32:17,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-12-21 05:32:17,407 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 20 states have call predecessors, (96), 20 states have call successors, (96) Word has length 263 [2023-12-21 05:32:17,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-12-21 05:32:17,407 INFO L225 Difference]: With dead ends: 193 [2023-12-21 05:32:17,407 INFO L226 Difference]: Without dead ends: 0 [2023-12-21 05:32:17,408 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 499 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 180.0s TimeCoverageRelationStatistics Valid=218, Invalid=764, Unknown=10, NotChecked=0, Total=992 [2023-12-21 05:32:17,408 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 20 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 71 mSolverCounterUnsat, 11 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 48.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 11 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.2s IncrementalHoareTripleChecker+Time [2023-12-21 05:32:17,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 836 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 996 Invalid, 11 Unknown, 0 Unchecked, 48.2s Time] [2023-12-21 05:32:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-12-21 05:32:17,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-12-21 05:32:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-12-21 05:32:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-12-21 05:32:17,409 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 263 [2023-12-21 05:32:17,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-12-21 05:32:17,409 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-12-21 05:32:17,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 20 states have call successors, (98), 3 states have call predecessors, (98), 2 states have return successors, (96), 20 states have call predecessors, (96), 20 states have call successors, (96) [2023-12-21 05:32:17,409 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-12-21 05:32:17,409 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-12-21 05:32:17,411 INFO L805 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-12-21 05:32:17,421 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-12-21 05:32:17,619 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,SelfDestructingSolverStorable12 [2023-12-21 05:32:17,620 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-12-21 05:32:52,760 WARN L293 SmtUtils]: Spent 34.72s on a formula simplification. DAG size of input: 253 DAG size of output: 50 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-21 05:35:17,282 WARN L293 SmtUtils]: Spent 2.41m on a formula simplification. DAG size of input: 256 DAG size of output: 78 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-21 05:36:34,064 WARN L293 SmtUtils]: Spent 1.28m on a formula simplification. DAG size of input: 273 DAG size of output: 71 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2023-12-21 05:38:27,622 WARN L293 SmtUtils]: Spent 1.89m on a formula simplification. DAG size of input: 262 DAG size of output: 86 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) Received shutdown request... [2023-12-21 05:38:53,490 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 05:38:54,690 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forcibly destroying the process [2023-12-21 05:38:54,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 137 [2023-12-21 05:38:54,706 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Not enough levels on assertion stack at de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.pop(Scriptor.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.DiffWrapperScript.pop(DiffWrapperScript.java:99) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.HistoryRecordingScript.pop(HistoryRecordingScript.java:117) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.pop(WrapperScript.java:153) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.pop(UndoableWrapperScript.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.UndoableWrapperScript.restore(UndoableWrapperScript.java:87) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplify(SmtUtils.java:233) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:324) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.simplifyWithStatistics(SmtUtils.java:316) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter(HoareAnnotationComposer.java:149) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.(HoareAnnotationComposer.java:105) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.NwaCegarLoop.computeIcfgHoareAnnotation(NwaCegarLoop.java:539) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop$CegarLoopResultBuilder.getResult(AbstractCegarLoop.java:873) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:416) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-12-21 05:38:54,708 INFO L158 Benchmark]: Toolchain (without parser) took 886509.61ms. Allocated memory was 265.3MB in the beginning and 318.8MB in the end (delta: 53.5MB). Free memory was 211.6MB in the beginning and 164.1MB in the end (delta: 47.5MB). Peak memory consumption was 173.7MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 204.5MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.11ms. Allocated memory is still 265.3MB. Free memory was 211.6MB in the beginning and 200.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.35ms. Allocated memory is still 265.3MB. Free memory was 200.1MB in the beginning and 198.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: Boogie Preprocessor took 20.38ms. Allocated memory is still 265.3MB. Free memory was 198.5MB in the beginning and 197.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: RCFGBuilder took 261.88ms. Allocated memory is still 265.3MB. Free memory was 197.0MB in the beginning and 184.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,709 INFO L158 Benchmark]: TraceAbstraction took 886050.92ms. Allocated memory was 265.3MB in the beginning and 318.8MB in the end (delta: 53.5MB). Free memory was 184.4MB in the beginning and 164.1MB in the end (delta: 20.2MB). Peak memory consumption was 146.5MB. Max. memory is 8.0GB. [2023-12-21 05:38:54,710 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 204.5MB. Free memory is still 150.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 153.11ms. Allocated memory is still 265.3MB. Free memory was 211.6MB in the beginning and 200.1MB in the end (delta: 11.5MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Procedure Inliner took 19.35ms. Allocated memory is still 265.3MB. Free memory was 200.1MB in the beginning and 198.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 20.38ms. Allocated memory is still 265.3MB. Free memory was 198.5MB in the beginning and 197.0MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 261.88ms. Allocated memory is still 265.3MB. Free memory was 197.0MB in the beginning and 184.9MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * TraceAbstraction took 886050.92ms. Allocated memory was 265.3MB in the beginning and 318.8MB in the end (delta: 53.5MB). Free memory was 184.4MB in the beginning and 164.1MB in the end (delta: 20.2MB). Peak memory consumption was 146.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Not enough levels on assertion stack de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Not enough levels on assertion stack: de.uni_freiburg.informatik.ultimate.logic.NoopScript.pop(NoopScript.java:272) RESULT: Ultimate could not prove your program: Toolchain returned no result. Completed graceful shutdown