/usr/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 -tc ../../../trunk/examples/toolchains/AutomizerC.xml -i ../sv-benchmarks/c/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:36:56,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:36:56,686 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:36:56,705 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:36:56,752 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2023-04-01 18:36:56,782 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:36:56,782 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:36:56,782 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:36:56,783 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:36:56,783 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:36:56,784 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:36:56,784 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:36:56,784 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:36:56,784 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:36:56,784 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:36:56,785 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:36:56,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:36:56,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:36:56,786 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:36:56,787 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:36:56,787 INFO L138 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:36:56,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:36:56,987 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:36:56,991 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:36:56,992 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:36:56,992 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:36:56,993 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_two_index_06.i [2023-04-01 18:36:58,135 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:36:58,279 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:36:58,279 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_06.i [2023-04-01 18:36:58,283 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f414e9332/cf4fabfd8edc49798d3b554c60ca5f2a/FLAG3f72d9385 [2023-04-01 18:36:58,293 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f414e9332/cf4fabfd8edc49798d3b554c60ca5f2a [2023-04-01 18:36:58,295 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:36:58,296 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:36:58,296 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:36:58,296 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:36:58,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:36:58,299 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60f7da4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58, skipping insertion in model container [2023-04-01 18:36:58,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,304 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:36:58,313 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:36:58,415 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_06.i[814,827] [2023-04-01 18:36:58,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:36:58,437 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:36:58,445 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_two_index_06.i[814,827] [2023-04-01 18:36:58,449 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:36:58,458 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:36:58,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58 WrapperNode [2023-04-01 18:36:58,459 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:36:58,460 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:36:58,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:36:58,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:36:58,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,468 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,472 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,478 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,478 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,480 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:36:58,481 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:36:58,481 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:36:58,481 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:36:58,481 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (1/1) ... [2023-04-01 18:36:58,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:36:58,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:58,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 18:36:58,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 18:36:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:36:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:36:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:36:58,526 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:36:58,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:36:58,527 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:36:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:36:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:36:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:36:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:36:58,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:36:58,575 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:36:58,576 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:36:58,745 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:36:58,749 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:36:58,749 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 18:36:58,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:36:58 BoogieIcfgContainer [2023-04-01 18:36:58,751 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:36:58,753 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:36:58,753 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:36:58,755 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:36:58,755 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:36:58" (1/3) ... [2023-04-01 18:36:58,755 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51218eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:36:58, skipping insertion in model container [2023-04-01 18:36:58,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:36:58" (2/3) ... [2023-04-01 18:36:58,756 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51218eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:36:58, skipping insertion in model container [2023-04-01 18:36:58,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:36:58" (3/3) ... [2023-04-01 18:36:58,773 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2023-04-01 18:36:58,805 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:36:58,806 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:36:58,846 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:36:58,852 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=LoopsAndPotentialCycles, 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;@3517dd40, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:36:58,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:36:58,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 18:36:58,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:36:58,862 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:58,862 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:58,863 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:58,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:58,868 INFO L85 PathProgramCache]: Analyzing trace with hash 840989783, now seen corresponding path program 1 times [2023-04-01 18:36:58,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:58,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893180089] [2023-04-01 18:36:58,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:58,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:59,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:59,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:59,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893180089] [2023-04-01 18:36:59,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893180089] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:59,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:36:59,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:36:59,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214084494] [2023-04-01 18:36:59,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:59,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:36:59,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:36:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:36:59,098 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:59,178 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2023-04-01 18:36:59,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:36:59,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 18:36:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:59,184 INFO L225 Difference]: With dead ends: 41 [2023-04-01 18:36:59,184 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 18:36:59,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:36:59,189 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:59,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:36:59,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 18:36:59,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 18:36:59,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:59,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2023-04-01 18:36:59,215 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2023-04-01 18:36:59,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:59,215 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2023-04-01 18:36:59,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,216 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2023-04-01 18:36:59,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-04-01 18:36:59,216 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:59,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:59,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:36:59,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:59,217 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:59,217 INFO L85 PathProgramCache]: Analyzing trace with hash -519126957, now seen corresponding path program 1 times [2023-04-01 18:36:59,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:59,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928016195] [2023-04-01 18:36:59,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:59,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:59,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:59,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:59,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:59,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928016195] [2023-04-01 18:36:59,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928016195] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:59,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:36:59,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:36:59,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716668728] [2023-04-01 18:36:59,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:59,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:36:59,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:59,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:36:59,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:36:59,285 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:59,323 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2023-04-01 18:36:59,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:36:59,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-04-01 18:36:59,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:59,324 INFO L225 Difference]: With dead ends: 32 [2023-04-01 18:36:59,324 INFO L226 Difference]: Without dead ends: 20 [2023-04-01 18:36:59,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:36:59,326 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 16 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:59,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:36:59,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-04-01 18:36:59,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-04-01 18:36:59,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:59,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-04-01 18:36:59,332 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2023-04-01 18:36:59,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:59,332 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-04-01 18:36:59,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,332 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-04-01 18:36:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 18:36:59,347 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:59,347 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:59,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:36:59,350 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:59,350 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash -1970595897, now seen corresponding path program 1 times [2023-04-01 18:36:59,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:59,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094682750] [2023-04-01 18:36:59,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:59,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:59,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 18:36:59,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094682750] [2023-04-01 18:36:59,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094682750] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:59,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749269469] [2023-04-01 18:36:59,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:59,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:59,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:59,465 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) [2023-04-01 18:36:59,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 18:36:59,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 2 conjunts are in the unsatisfiable core [2023-04-01 18:36:59,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:36:59,552 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 18:36:59,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749269469] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:36:59,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 18:36:59,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2023-04-01 18:36:59,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043741390] [2023-04-01 18:36:59,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:36:59,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:36:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:36:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:36:59,554 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:36:59,567 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-04-01 18:36:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:36:59,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-04-01 18:36:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:36:59,569 INFO L225 Difference]: With dead ends: 34 [2023-04-01 18:36:59,569 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 18:36:59,570 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-04-01 18:36:59,570 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 18:36:59,571 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 29 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 18:36:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 18:36:59,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-04-01 18:36:59,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:36:59,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-04-01 18:36:59,577 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2023-04-01 18:36:59,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:36:59,577 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-04-01 18:36:59,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:36:59,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-04-01 18:36:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 18:36:59,577 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:36:59,577 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:36:59,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 18:36:59,783 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 [2023-04-01 18:36:59,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:36:59,784 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:36:59,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1217133170, now seen corresponding path program 1 times [2023-04-01 18:36:59,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:36:59,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051135943] [2023-04-01 18:36:59,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:59,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:36:59,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:36:59,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:36:59,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:36:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051135943] [2023-04-01 18:36:59,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051135943] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:36:59,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801304311] [2023-04-01 18:36:59,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:36:59,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:36:59,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:36:59,859 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) [2023-04-01 18:36:59,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 18:36:59,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:36:59,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:36:59,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:36:59,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:36:59,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:36:59,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 18:36:59,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801304311] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:36:59,966 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:36:59,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:36:59,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629753486] [2023-04-01 18:36:59,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:36:59,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:36:59,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:36:59,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:36:59,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:36:59,968 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:37:00,065 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2023-04-01 18:37:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:37:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-01 18:37:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:37:00,066 INFO L225 Difference]: With dead ends: 44 [2023-04-01 18:37:00,066 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 18:37:00,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-04-01 18:37:00,067 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:37:00,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 22 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:37:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 18:37:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2023-04-01 18:37:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:37:00,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2023-04-01 18:37:00,072 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 17 [2023-04-01 18:37:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:37:00,072 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2023-04-01 18:37:00,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2023-04-01 18:37:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 18:37:00,072 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:37:00,073 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:37:00,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 18:37:00,278 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 [2023-04-01 18:37:00,280 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:37:00,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:37:00,280 INFO L85 PathProgramCache]: Analyzing trace with hash 47980467, now seen corresponding path program 2 times [2023-04-01 18:37:00,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:37:00,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512847827] [2023-04-01 18:37:00,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:37:00,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:37:00,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:00,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:37:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:00,383 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-04-01 18:37:00,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:37:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512847827] [2023-04-01 18:37:00,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512847827] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:37:00,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684153221] [2023-04-01 18:37:00,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:37:00,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:37:00,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:37:00,393 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) [2023-04-01 18:37:00,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 18:37:00,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:37:00,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:37:00,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:37:00,462 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:37:00,499 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:37:00,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:37:00,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:37:00,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684153221] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:37:00,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:37:00,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 16 [2023-04-01 18:37:00,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958904617] [2023-04-01 18:37:00,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:37:00,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-04-01 18:37:00,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:37:00,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-04-01 18:37:00,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2023-04-01 18:37:00,545 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:37:00,820 INFO L93 Difference]: Finished difference Result 61 states and 78 transitions. [2023-04-01 18:37:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 18:37:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2023-04-01 18:37:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:37:00,823 INFO L225 Difference]: With dead ends: 61 [2023-04-01 18:37:00,823 INFO L226 Difference]: Without dead ends: 47 [2023-04-01 18:37:00,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=500, Unknown=0, NotChecked=0, Total=812 [2023-04-01 18:37:00,826 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:37:00,826 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 32 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:37:00,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-04-01 18:37:00,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2023-04-01 18:37:00,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:37:00,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2023-04-01 18:37:00,836 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 21 [2023-04-01 18:37:00,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:37:00,836 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2023-04-01 18:37:00,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:00,836 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2023-04-01 18:37:00,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-01 18:37:00,837 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:37:00,837 INFO L195 NwaCegarLoop]: trace histogram [12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:37:00,846 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 18:37:01,049 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 [2023-04-01 18:37:01,051 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:37:01,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:37:01,052 INFO L85 PathProgramCache]: Analyzing trace with hash -134339565, now seen corresponding path program 3 times [2023-04-01 18:37:01,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:37:01,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921056904] [2023-04-01 18:37:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:37:01,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:37:01,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:01,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:37:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 18:37:01,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:37:01,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921056904] [2023-04-01 18:37:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921056904] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:37:01,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651986051] [2023-04-01 18:37:01,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:37:01,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:37:01,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:37:01,193 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) [2023-04-01 18:37:01,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 18:37:01,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 18:37:01,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:37:01,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:37:01,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:37:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 18:37:01,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:37:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 18:37:01,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651986051] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:37:01,381 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:37:01,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:37:01,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833068164] [2023-04-01 18:37:01,381 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:37:01,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:37:01,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:37:01,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:37:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:37:01,383 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:01,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:37:01,626 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-04-01 18:37:01,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 18:37:01,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2023-04-01 18:37:01,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:37:01,629 INFO L225 Difference]: With dead ends: 79 [2023-04-01 18:37:01,629 INFO L226 Difference]: Without dead ends: 69 [2023-04-01 18:37:01,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2023-04-01 18:37:01,631 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:37:01,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 22 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:37:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-04-01 18:37:01,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 41. [2023-04-01 18:37:01,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:37:01,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2023-04-01 18:37:01,647 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2023-04-01 18:37:01,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:37:01,648 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2023-04-01 18:37:01,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:01,648 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2023-04-01 18:37:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-04-01 18:37:01,648 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:37:01,648 INFO L195 NwaCegarLoop]: trace histogram [12, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:37:01,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 18:37:01,854 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 [2023-04-01 18:37:01,854 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:37:01,854 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:37:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1149907763, now seen corresponding path program 4 times [2023-04-01 18:37:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:37:01,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504090010] [2023-04-01 18:37:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:37:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:37:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:02,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:37:02,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:02,035 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2023-04-01 18:37:02,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:37:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504090010] [2023-04-01 18:37:02,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504090010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:37:02,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691001442] [2023-04-01 18:37:02,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:37:02,035 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:37:02,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:37:02,050 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) [2023-04-01 18:37:02,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 18:37:02,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:37:02,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:37:02,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-01 18:37:02,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:37:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 18:37:02,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:37:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2023-04-01 18:37:02,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691001442] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:37:02,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:37:02,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15, 15] total 39 [2023-04-01 18:37:02,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845936065] [2023-04-01 18:37:02,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:37:02,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 18:37:02,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:37:02,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 18:37:02,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 18:37:02,426 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:37:03,134 INFO L93 Difference]: Finished difference Result 130 states and 173 transitions. [2023-04-01 18:37:03,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-04-01 18:37:03,135 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2023-04-01 18:37:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:37:03,136 INFO L225 Difference]: With dead ends: 130 [2023-04-01 18:37:03,136 INFO L226 Difference]: Without dead ends: 108 [2023-04-01 18:37:03,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1588 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2106, Invalid=3444, Unknown=0, NotChecked=0, Total=5550 [2023-04-01 18:37:03,139 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 120 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 18:37:03,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 57 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 18:37:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-04-01 18:37:03,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2023-04-01 18:37:03,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:37:03,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2023-04-01 18:37:03,150 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 37 [2023-04-01 18:37:03,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:37:03,150 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2023-04-01 18:37:03,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 38 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:37:03,150 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2023-04-01 18:37:03,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-04-01 18:37:03,151 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:37:03,151 INFO L195 NwaCegarLoop]: trace histogram [35, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:37:03,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-01 18:37:03,356 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 [2023-04-01 18:37:03,357 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:37:03,357 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:37:03,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1277030681, now seen corresponding path program 5 times [2023-04-01 18:37:03,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:37:03,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932971449] [2023-04-01 18:37:03,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:37:03,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:37:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:03,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:37:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:37:03,736 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2023-04-01 18:37:03,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:37:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932971449] [2023-04-01 18:37:03,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932971449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:37:03,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343532268] [2023-04-01 18:37:03,736 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:37:03,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:37:03,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:37:03,753 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) [2023-04-01 18:37:03,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 18:39:26,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-04-01 18:39:26,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:39:26,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 37 conjunts are in the unsatisfiable core [2023-04-01 18:39:26,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:39:26,607 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:39:26,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:39:27,503 INFO L134 CoverageAnalysis]: Checked inductivity of 735 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-04-01 18:39:27,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343532268] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:39:27,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:39:27,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 38, 38] total 85 [2023-04-01 18:39:27,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271184988] [2023-04-01 18:39:27,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:39:27,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-04-01 18:39:27,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:39:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-04-01 18:39:27,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3487, Invalid=3653, Unknown=0, NotChecked=0, Total=7140 [2023-04-01 18:39:27,508 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 84 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:39:29,709 INFO L93 Difference]: Finished difference Result 210 states and 287 transitions. [2023-04-01 18:39:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-04-01 18:39:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 84 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2023-04-01 18:39:29,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:39:29,712 INFO L225 Difference]: With dead ends: 210 [2023-04-01 18:39:29,712 INFO L226 Difference]: Without dead ends: 184 [2023-04-01 18:39:29,717 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9471 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=10455, Invalid=17267, Unknown=0, NotChecked=0, Total=27722 [2023-04-01 18:39:29,718 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 243 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:39:29,718 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 22 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [266 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:39:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2023-04-01 18:39:29,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 121. [2023-04-01 18:39:29,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 115 states have (on average 1.0260869565217392) internal successors, (118), 115 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 18:39:29,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2023-04-01 18:39:29,730 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 64 [2023-04-01 18:39:29,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:39:29,731 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2023-04-01 18:39:29,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.223529411764706) internal successors, (104), 84 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-01 18:39:29,731 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2023-04-01 18:39:29,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-04-01 18:39:29,732 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:39:29,732 INFO L195 NwaCegarLoop]: trace histogram [81, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:39:29,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-01 18:39:29,932 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 [2023-04-01 18:39:29,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:39:29,933 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:39:29,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1438902094, now seen corresponding path program 6 times [2023-04-01 18:39:29,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:39:29,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718993426] [2023-04-01 18:39:29,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:39:29,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:39:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:30,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:39:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:39:30,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3552 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 3321 trivial. 0 not checked. [2023-04-01 18:39:30,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:39:30,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718993426] [2023-04-01 18:39:30,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718993426] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:39:30,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803901021] [2023-04-01 18:39:30,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-01 18:39:30,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:39:30,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:39:30,859 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) [2023-04-01 18:39:30,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process