/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_copyInitSum3_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 18:22:31,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 18:22:31,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 18:22:31,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-01 18:22:31,489 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 18:22:31,515 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 18:22:31,516 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 18:22:31,516 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 18:22:31,516 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 18:22:31,522 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 18:22:31,523 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 18:22:31,523 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-01 18:22:31,523 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-01 18:22:31,524 INFO L138 SettingsManager]: * Use SBE=true [2023-04-01 18:22:31,524 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 18:22:31,525 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 18:22:31,526 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 18:22:31,526 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 18:22:31,526 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 18:22:31,526 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 18:22:31,526 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-01 18:22:31,527 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 18:22:31,527 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:22:31,527 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 18:22:31,527 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 18:22:31,527 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 18:22:31,527 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-01 18:22:31,528 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-01 18:22:31,528 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-01 18:22:31,765 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 18:22:31,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 18:22:31,799 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 18:22:31,800 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 18:22:31,800 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 18:22:31,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2023-04-01 18:22:32,960 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 18:22:33,152 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 18:22:33,153 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum3_ground.i [2023-04-01 18:22:33,157 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd0351e1/e661fc9ede0a4638a7a26604527f6109/FLAG8602cb0cd [2023-04-01 18:22:33,174 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fd0351e1/e661fc9ede0a4638a7a26604527f6109 [2023-04-01 18:22:33,176 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 18:22:33,177 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 18:22:33,178 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 18:22:33,178 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 18:22:33,181 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 18:22:33,182 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,183 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38dada47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33, skipping insertion in model container [2023-04-01 18:22:33,183 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,189 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 18:22:33,204 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 18:22:33,322 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_copyInitSum3_ground.i[821,834] [2023-04-01 18:22:33,336 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:22:33,344 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 18:22:33,355 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_copyInitSum3_ground.i[821,834] [2023-04-01 18:22:33,361 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 18:22:33,374 INFO L208 MainTranslator]: Completed translation [2023-04-01 18:22:33,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33 WrapperNode [2023-04-01 18:22:33,374 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 18:22:33,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 18:22:33,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 18:22:33,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 18:22:33,387 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,404 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,405 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,411 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,416 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,418 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 18:22:33,419 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 18:22:33,419 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 18:22:33,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 18:22:33,420 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (1/1) ... [2023-04-01 18:22:33,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 18:22:33,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:33,468 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 18:22:33,471 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 18:22:33,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 18:22:33,497 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 18:22:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 18:22:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-01 18:22:33,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 18:22:33,499 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 18:22:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 18:22:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 18:22:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 18:22:33,500 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 18:22:33,503 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 18:22:33,504 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 18:22:33,568 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 18:22:33,570 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 18:22:33,810 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 18:22:33,815 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 18:22:33,815 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-01 18:22:33,816 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:22:33 BoogieIcfgContainer [2023-04-01 18:22:33,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 18:22:33,818 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 18:22:33,819 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 18:22:33,833 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 18:22:33,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 06:22:33" (1/3) ... [2023-04-01 18:22:33,834 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bfd031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:22:33, skipping insertion in model container [2023-04-01 18:22:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 06:22:33" (2/3) ... [2023-04-01 18:22:33,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@8bfd031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 06:22:33, skipping insertion in model container [2023-04-01 18:22:33,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 06:22:33" (3/3) ... [2023-04-01 18:22:33,836 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum3_ground.i [2023-04-01 18:22:33,870 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 18:22:33,870 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 18:22:33,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 18:22:33,927 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;@53982bbf, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-01 18:22:33,927 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 18:22:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 18:22:33,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 18:22:33,936 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:33,937 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:33,937 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:33,941 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:33,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1055076827, now seen corresponding path program 1 times [2023-04-01 18:22:33,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:33,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177072230] [2023-04-01 18:22:33,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:33,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:34,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:34,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,118 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 18:22:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177072230] [2023-04-01 18:22:34,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177072230] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:22:34,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:22:34,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 18:22:34,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293730777] [2023-04-01 18:22:34,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:22:34,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 18:22:34,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:34,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 18:22:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 18:22:34,151 INFO L87 Difference]: Start difference. First operand has 32 states, 24 states have (on average 1.5) internal successors, (36), 25 states have internal predecessors, (36), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 18:22:34,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:34,234 INFO L93 Difference]: Finished difference Result 57 states and 76 transitions. [2023-04-01 18:22:34,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 18:22:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 19 [2023-04-01 18:22:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:34,245 INFO L225 Difference]: With dead ends: 57 [2023-04-01 18:22:34,245 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 18:22:34,247 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 18:22:34,250 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:34,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 10 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:34,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 18:22:34,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2023-04-01 18:22:34,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 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 18:22:34,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-04-01 18:22:34,292 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2023-04-01 18:22:34,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:34,292 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-04-01 18:22:34,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 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 18:22:34,293 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-04-01 18:22:34,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-01 18:22:34,293 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:34,294 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 18:22:34,294 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:34,295 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:34,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1984658533, now seen corresponding path program 1 times [2023-04-01 18:22:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:34,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240673438] [2023-04-01 18:22:34,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:34,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:34,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,423 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 18:22:34,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:34,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240673438] [2023-04-01 18:22:34,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240673438] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 18:22:34,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 18:22:34,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-01 18:22:34,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854284643] [2023-04-01 18:22:34,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 18:22:34,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-01 18:22:34,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-01 18:22:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-01 18:22:34,433 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18:22:34,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:34,569 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2023-04-01 18:22:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-01 18:22:34,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 19 [2023-04-01 18:22:34,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:34,571 INFO L225 Difference]: With dead ends: 54 [2023-04-01 18:22:34,571 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 18:22:34,572 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 18:22:34,573 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 35 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:34,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 12 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:34,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 18:22:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2023-04-01 18:22:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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 18:22:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 18:22:34,589 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 19 [2023-04-01 18:22:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:34,590 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 18:22:34,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18:22:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 18:22:34,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 18:22:34,591 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:34,591 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:34,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 18:22:34,591 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:34,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:34,592 INFO L85 PathProgramCache]: Analyzing trace with hash 433762445, now seen corresponding path program 1 times [2023-04-01 18:22:34,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:34,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367407742] [2023-04-01 18:22:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:34,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:34,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:34,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:34,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367407742] [2023-04-01 18:22:34,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367407742] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:34,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976177283] [2023-04-01 18:22:34,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:34,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:34,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:34,754 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 18:22:34,756 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 18:22:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:34,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 3 conjunts are in the unsatisfiable core [2023-04-01 18:22:34,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:34,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:34,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 18:22:34,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976177283] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:34,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:34,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-01 18:22:34,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328408774] [2023-04-01 18:22:34,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:34,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-01 18:22:34,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:34,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-01 18:22:34,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-04-01 18:22:34,946 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 18:22:35,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:35,147 INFO L93 Difference]: Finished difference Result 75 states and 94 transitions. [2023-04-01 18:22:35,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 18:22:35,147 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 26 [2023-04-01 18:22:35,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:35,149 INFO L225 Difference]: With dead ends: 75 [2023-04-01 18:22:35,149 INFO L226 Difference]: Without dead ends: 52 [2023-04-01 18:22:35,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 51 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 18:22:35,150 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:35,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 12 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 18:22:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-04-01 18:22:35,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-04-01 18:22:35,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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 18:22:35,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2023-04-01 18:22:35,160 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 26 [2023-04-01 18:22:35,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:35,161 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2023-04-01 18:22:35,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 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 18:22:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2023-04-01 18:22:35,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-04-01 18:22:35,162 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:35,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:35,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:35,369 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 18:22:35,369 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:35,370 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash 1624056963, now seen corresponding path program 2 times [2023-04-01 18:22:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605764331] [2023-04-01 18:22:35,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:35,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:35,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 18:22:35,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:35,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605764331] [2023-04-01 18:22:35,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605764331] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:35,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761166397] [2023-04-01 18:22:35,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-01 18:22:35,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:35,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:35,635 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 18:22:35,638 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 18:22:35,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-01 18:22:35,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:35,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 18:22:35,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:35,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 18:22:35,773 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-04-01 18:22:35,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761166397] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:35,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:35,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-04-01 18:22:35,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369838336] [2023-04-01 18:22:35,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:35,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 18:22:35,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:35,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 18:22:35,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-04-01 18:22:35,855 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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 18:22:36,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:36,264 INFO L93 Difference]: Finished difference Result 135 states and 166 transitions. [2023-04-01 18:22:36,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-04-01 18:22:36,264 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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 47 [2023-04-01 18:22:36,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:36,268 INFO L225 Difference]: With dead ends: 135 [2023-04-01 18:22:36,268 INFO L226 Difference]: Without dead ends: 94 [2023-04-01 18:22:36,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-04-01 18:22:36,271 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 155 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:36,272 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [156 Valid, 22 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:22:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-04-01 18:22:36,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2023-04-01 18:22:36,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 88 states have internal predecessors, (93), 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 18:22:36,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2023-04-01 18:22:36,292 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 47 [2023-04-01 18:22:36,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:36,293 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2023-04-01 18:22:36,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 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 18:22:36,293 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2023-04-01 18:22:36,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-04-01 18:22:36,295 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:36,295 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:36,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:36,501 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 18:22:36,502 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:36,502 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:36,502 INFO L85 PathProgramCache]: Analyzing trace with hash 431295711, now seen corresponding path program 3 times [2023-04-01 18:22:36,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:36,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376293503] [2023-04-01 18:22:36,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:36,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:36,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:36,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:36,821 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 18:22:36,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376293503] [2023-04-01 18:22:36,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376293503] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:36,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333658987] [2023-04-01 18:22:36,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 18:22:36,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:36,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:36,826 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 18:22:36,828 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 18:22:37,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-04-01 18:22:37,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:37,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-01 18:22:37,412 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 18:22:37,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:37,646 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2023-04-01 18:22:37,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333658987] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:37,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:37,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-04-01 18:22:37,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275279454] [2023-04-01 18:22:37,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:37,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-04-01 18:22:37,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:37,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-04-01 18:22:37,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-04-01 18:22:37,649 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 18:22:38,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:38,339 INFO L93 Difference]: Finished difference Result 255 states and 310 transitions. [2023-04-01 18:22:38,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-04-01 18:22:38,340 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 89 [2023-04-01 18:22:38,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:38,341 INFO L225 Difference]: With dead ends: 255 [2023-04-01 18:22:38,341 INFO L226 Difference]: Without dead ends: 178 [2023-04-01 18:22:38,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-04-01 18:22:38,343 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 353 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:38,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [354 Valid, 27 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 18:22:38,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-04-01 18:22:38,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2023-04-01 18:22:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 172 states have internal predecessors, (177), 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 18:22:38,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2023-04-01 18:22:38,361 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 89 [2023-04-01 18:22:38,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:38,361 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2023-04-01 18:22:38,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7692307692307692) internal successors, (46), 25 states have internal predecessors, (46), 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 18:22:38,361 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2023-04-01 18:22:38,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-04-01 18:22:38,363 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:38,363 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:38,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 18:22:38,571 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 18:22:38,571 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:38,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:38,572 INFO L85 PathProgramCache]: Analyzing trace with hash -966253673, now seen corresponding path program 4 times [2023-04-01 18:22:38,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:38,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759280074] [2023-04-01 18:22:38,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:38,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:39,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:39,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2023-04-01 18:22:39,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759280074] [2023-04-01 18:22:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759280074] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463698012] [2023-04-01 18:22:39,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 18:22:39,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:39,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:39,700 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 18:22:39,728 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 18:22:39,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 18:22:39,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 18:22:39,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 705 conjuncts, 24 conjunts are in the unsatisfiable core [2023-04-01 18:22:39,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 18:22:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2023-04-01 18:22:40,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 18:22:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1705 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1221 trivial. 0 not checked. [2023-04-01 18:22:40,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463698012] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 18:22:40,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 18:22:40,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-04-01 18:22:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044669196] [2023-04-01 18:22:40,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 18:22:40,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-04-01 18:22:40,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-01 18:22:40,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-04-01 18:22:40,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-04-01 18:22:40,757 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 18:22:42,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 18:22:42,598 INFO L93 Difference]: Finished difference Result 495 states and 598 transitions. [2023-04-01 18:22:42,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-04-01 18:22:42,599 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 173 [2023-04-01 18:22:42,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 18:22:42,600 INFO L225 Difference]: With dead ends: 495 [2023-04-01 18:22:42,600 INFO L226 Difference]: Without dead ends: 346 [2023-04-01 18:22:42,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-04-01 18:22:42,604 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 665 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 462 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-04-01 18:22:42,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 27 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [462 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-04-01 18:22:42,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2023-04-01 18:22:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2023-04-01 18:22:42,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 340 states have (on average 1.0147058823529411) internal successors, (345), 340 states have internal predecessors, (345), 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 18:22:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 350 transitions. [2023-04-01 18:22:42,632 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 350 transitions. Word has length 173 [2023-04-01 18:22:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 18:22:42,632 INFO L495 AbstractCegarLoop]: Abstraction has 346 states and 350 transitions. [2023-04-01 18:22:42,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 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 18:22:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 350 transitions. [2023-04-01 18:22:42,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2023-04-01 18:22:42,636 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 18:22:42,636 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 18:22:42,649 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 18:22:42,843 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 18:22:42,844 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 18:22:42,844 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 18:22:42,844 INFO L85 PathProgramCache]: Analyzing trace with hash 677341447, now seen corresponding path program 5 times [2023-04-01 18:22:42,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-01 18:22:42,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031189247] [2023-04-01 18:22:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 18:22:42,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 18:22:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-01 18:22:45,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 18:22:45,947 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 6348 trivial. 0 not checked. [2023-04-01 18:22:45,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-01 18:22:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031189247] [2023-04-01 18:22:45,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031189247] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 18:22:45,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63841796] [2023-04-01 18:22:45,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-01 18:22:45,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 18:22:45,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 18:22:45,949 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 18:22:45,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process