/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_copyInitSum2_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-30 22:07:30,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-30 22:07:30,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-30 22:07:30,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-03-30 22:07:30,207 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 [2023-03-30 22:07:30,239 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-30 22:07:30,239 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-30 22:07:30,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-30 22:07:30,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-30 22:07:30,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-30 22:07:30,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-30 22:07:30,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-03-30 22:07:30,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-03-30 22:07:30,241 INFO L138 SettingsManager]: * Use SBE=true [2023-03-30 22:07:30,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-30 22:07:30,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-30 22:07:30,243 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-30 22:07:30,243 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:07:30,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-30 22:07:30,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-30 22:07:30,244 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-03-30 22:07:30,245 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-03-30 22:07:30,245 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-03-30 22:07:30,482 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-30 22:07:30,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-30 22:07:30,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-30 22:07:30,517 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-30 22:07:30,518 INFO L275 PluginConnector]: CDTParser initialized [2023-03-30 22:07:30,519 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2023-03-30 22:07:31,734 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-30 22:07:31,926 INFO L351 CDTParser]: Found 1 translation units. [2023-03-30 22:07:31,926 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copyInitSum2_ground-1.i [2023-03-30 22:07:31,932 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509f6715d/5610e4385112492a854ecd3995fda5b5/FLAG07d303ab0 [2023-03-30 22:07:31,945 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/509f6715d/5610e4385112492a854ecd3995fda5b5 [2023-03-30 22:07:31,947 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-30 22:07:31,948 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-30 22:07:31,949 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-30 22:07:31,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-30 22:07:31,952 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-30 22:07:31,953 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:07:31" (1/1) ... [2023-03-30 22:07:31,954 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ef0670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:31, skipping insertion in model container [2023-03-30 22:07:31,954 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.03 10:07:31" (1/1) ... [2023-03-30 22:07:31,961 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-30 22:07:31,975 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-30 22:07:32,127 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_copyInitSum2_ground-1.i[823,836] [2023-03-30 22:07:32,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:07:32,159 INFO L203 MainTranslator]: Completed pre-run [2023-03-30 22:07:32,172 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_copyInitSum2_ground-1.i[823,836] [2023-03-30 22:07:32,180 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-30 22:07:32,197 INFO L208 MainTranslator]: Completed translation [2023-03-30 22:07:32,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32 WrapperNode [2023-03-30 22:07:32,198 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-30 22:07:32,200 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-30 22:07:32,200 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-30 22:07:32,200 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-30 22:07:32,210 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,210 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,221 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,225 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,226 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,227 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-30 22:07:32,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-30 22:07:32,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-30 22:07:32,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-30 22:07:32,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (1/1) ... [2023-03-30 22:07:32,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-30 22:07:32,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:32,262 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) [2023-03-30 22:07:32,271 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 [2023-03-30 22:07:32,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-30 22:07:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-30 22:07:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-30 22:07:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-03-30 22:07:32,299 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-30 22:07:32,299 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-30 22:07:32,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-30 22:07:32,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-30 22:07:32,356 INFO L236 CfgBuilder]: Building ICFG [2023-03-30 22:07:32,357 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-30 22:07:32,475 INFO L277 CfgBuilder]: Performing block encoding [2023-03-30 22:07:32,483 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-30 22:07:32,484 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-03-30 22:07:32,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:07:32 BoogieIcfgContainer [2023-03-30 22:07:32,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-30 22:07:32,488 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-30 22:07:32,488 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-30 22:07:32,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-30 22:07:32,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.03 10:07:31" (1/3) ... [2023-03-30 22:07:32,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd9f03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:07:32, skipping insertion in model container [2023-03-30 22:07:32,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.03 10:07:32" (2/3) ... [2023-03-30 22:07:32,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd9f03b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.03 10:07:32, skipping insertion in model container [2023-03-30 22:07:32,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.03 10:07:32" (3/3) ... [2023-03-30 22:07:32,493 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-1.i [2023-03-30 22:07:32,514 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-30 22:07:32,514 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-30 22:07:32,585 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-30 22:07:32,594 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;@5d5edb0e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-03-30 22:07:32,594 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-30 22:07:32,598 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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) [2023-03-30 22:07:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-30 22:07:32,605 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:32,606 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:32,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:32,610 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:32,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1203830831, now seen corresponding path program 1 times [2023-03-30 22:07:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754554271] [2023-03-30 22:07:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:32,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:07:32,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:32,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754554271] [2023-03-30 22:07:32,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754554271] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:07:32,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:07:32,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-03-30 22:07:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91400862] [2023-03-30 22:07:32,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:07:32,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-03-30 22:07:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:32,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-03-30 22:07:32,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-03-30 22:07:32,856 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-03-30 22:07:32,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:32,940 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2023-03-30 22:07:32,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-03-30 22:07:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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 17 [2023-03-30 22:07:32,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:32,948 INFO L225 Difference]: With dead ends: 51 [2023-03-30 22:07:32,948 INFO L226 Difference]: Without dead ends: 24 [2023-03-30 22:07:32,951 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 [2023-03-30 22:07:32,954 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 24 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:32,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 10 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:32,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-30 22:07:32,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-30 22:07:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 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) [2023-03-30 22:07:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-03-30 22:07:32,993 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2023-03-30 22:07:32,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:32,994 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-03-30 22:07:32,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-03-30 22:07:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-03-30 22:07:32,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-30 22:07:32,995 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:32,995 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:32,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-30 22:07:32,995 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:32,996 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:32,996 INFO L85 PathProgramCache]: Analyzing trace with hash -351167801, now seen corresponding path program 1 times [2023-03-30 22:07:32,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:32,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547978639] [2023-03-30 22:07:32,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:32,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:33,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:33,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-30 22:07:33,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:33,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547978639] [2023-03-30 22:07:33,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547978639] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-30 22:07:33,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-30 22:07:33,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-30 22:07:33,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917818205] [2023-03-30 22:07:33,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-30 22:07:33,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-30 22:07:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:33,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-30 22:07:33,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-30 22:07:33,136 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-03-30 22:07:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:33,240 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2023-03-30 22:07:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-30 22:07:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2023-03-30 22:07:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:33,242 INFO L225 Difference]: With dead ends: 46 [2023-03-30 22:07:33,242 INFO L226 Difference]: Without dead ends: 29 [2023-03-30 22:07:33,242 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 [2023-03-30 22:07:33,244 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 28 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:33,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 12 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-03-30 22:07:33,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-03-30 22:07:33,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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) [2023-03-30 22:07:33,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2023-03-30 22:07:33,256 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2023-03-30 22:07:33,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:33,257 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2023-03-30 22:07:33,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 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) [2023-03-30 22:07:33,257 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2023-03-30 22:07:33,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-30 22:07:33,258 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:33,258 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] [2023-03-30 22:07:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-30 22:07:33,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:33,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:33,259 INFO L85 PathProgramCache]: Analyzing trace with hash -776685865, now seen corresponding path program 1 times [2023-03-30 22:07:33,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:33,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110811877] [2023-03-30 22:07:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:33,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:33,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:33,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:07:33,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:33,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110811877] [2023-03-30 22:07:33,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110811877] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:33,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183594624] [2023-03-30 22:07:33,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:33,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:33,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:33,431 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) [2023-03-30 22:07:33,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-30 22:07:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:33,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2023-03-30 22:07:33,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:33,535 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:07:33,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:33,569 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-30 22:07:33,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183594624] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:33,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:33,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-03-30 22:07:33,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801023123] [2023-03-30 22:07:33,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:33,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-03-30 22:07:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:33,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-03-30 22:07:33,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-03-30 22:07:33,578 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-03-30 22:07:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:33,740 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2023-03-30 22:07:33,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-30 22:07:33,741 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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 22 [2023-03-30 22:07:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:33,742 INFO L225 Difference]: With dead ends: 61 [2023-03-30 22:07:33,742 INFO L226 Difference]: Without dead ends: 42 [2023-03-30 22:07:33,743 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2023-03-30 22:07:33,747 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 57 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:33,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 12 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:33,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-30 22:07:33,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-03-30 22:07:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 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) [2023-03-30 22:07:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2023-03-30 22:07:33,766 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 22 [2023-03-30 22:07:33,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:33,766 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2023-03-30 22:07:33,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 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) [2023-03-30 22:07:33,766 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2023-03-30 22:07:33,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-30 22:07:33,767 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:33,767 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:33,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:33,967 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 [2023-03-30 22:07:33,968 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:33,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:33,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1920744777, now seen corresponding path program 2 times [2023-03-30 22:07:33,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:33,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202631253] [2023-03-30 22:07:33,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:33,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:34,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:34,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-30 22:07:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:34,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202631253] [2023-03-30 22:07:34,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202631253] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:34,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386817512] [2023-03-30 22:07:34,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-03-30 22:07:34,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:34,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:34,197 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) [2023-03-30 22:07:34,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-30 22:07:34,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-03-30 22:07:34,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:34,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-30 22:07:34,280 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-30 22:07:34,316 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-03-30 22:07:34,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386817512] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:34,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:34,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2023-03-30 22:07:34,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926057275] [2023-03-30 22:07:34,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:34,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-30 22:07:34,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:34,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-30 22:07:34,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2023-03-30 22:07:34,405 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2023-03-30 22:07:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:34,667 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2023-03-30 22:07:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-03-30 22:07:34,668 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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 37 [2023-03-30 22:07:34,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:34,670 INFO L225 Difference]: With dead ends: 103 [2023-03-30 22:07:34,670 INFO L226 Difference]: Without dead ends: 72 [2023-03-30 22:07:34,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=211, Invalid=341, Unknown=0, NotChecked=0, Total=552 [2023-03-30 22:07:34,673 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 117 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 22 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-30 22:07:34,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-03-30 22:07:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-03-30 22:07:34,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 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) [2023-03-30 22:07:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2023-03-30 22:07:34,696 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 37 [2023-03-30 22:07:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:34,697 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2023-03-30 22:07:34,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 13 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) [2023-03-30 22:07:34,697 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2023-03-30 22:07:34,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-03-30 22:07:34,700 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:34,701 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:34,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:34,911 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 [2023-03-30 22:07:34,912 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:34,913 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:34,913 INFO L85 PathProgramCache]: Analyzing trace with hash 576563871, now seen corresponding path program 3 times [2023-03-30 22:07:34,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:34,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855666426] [2023-03-30 22:07:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:34,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:35,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:35,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:35,338 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-03-30 22:07:35,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855666426] [2023-03-30 22:07:35,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855666426] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:35,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149756741] [2023-03-30 22:07:35,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-30 22:07:35,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:35,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:35,341 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) [2023-03-30 22:07:35,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-30 22:07:35,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-03-30 22:07:35,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:35,675 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-30 22:07:35,677 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:35,711 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-03-30 22:07:35,711 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:35,921 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-03-30 22:07:35,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149756741] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:35,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:35,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 26 [2023-03-30 22:07:35,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192013281] [2023-03-30 22:07:35,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:35,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-03-30 22:07:35,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:35,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-03-30 22:07:35,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2023-03-30 22:07:35,924 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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) [2023-03-30 22:07:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:36,539 INFO L93 Difference]: Finished difference Result 187 states and 228 transitions. [2023-03-30 22:07:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-03-30 22:07:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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 67 [2023-03-30 22:07:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:36,540 INFO L225 Difference]: With dead ends: 187 [2023-03-30 22:07:36,540 INFO L226 Difference]: Without dead ends: 132 [2023-03-30 22:07:36,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1403, Unknown=0, NotChecked=0, Total=2256 [2023-03-30 22:07:36,542 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 241 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:36,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 27 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-30 22:07:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-03-30 22:07:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2023-03-30 22:07:36,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 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) [2023-03-30 22:07:36,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2023-03-30 22:07:36,557 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 67 [2023-03-30 22:07:36,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:36,557 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2023-03-30 22:07:36,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6153846153846154) internal successors, (42), 25 states have internal predecessors, (42), 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) [2023-03-30 22:07:36,558 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2023-03-30 22:07:36,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-03-30 22:07:36,559 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:36,559 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:36,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:36,765 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 [2023-03-30 22:07:36,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:36,766 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:36,766 INFO L85 PathProgramCache]: Analyzing trace with hash -745754001, now seen corresponding path program 4 times [2023-03-30 22:07:36,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:36,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848481727] [2023-03-30 22:07:36,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:36,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:37,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-03-30 22:07:37,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:37,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848481727] [2023-03-30 22:07:37,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848481727] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:37,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115139350] [2023-03-30 22:07:37,609 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-30 22:07:37,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:37,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:37,610 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) [2023-03-30 22:07:37,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-30 22:07:37,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-30 22:07:37,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-30 22:07:37,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 24 conjunts are in the unsatisfiable core [2023-03-30 22:07:37,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-30 22:07:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-03-30 22:07:37,861 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-30 22:07:38,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2023-03-30 22:07:38,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115139350] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-30 22:07:38,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-30 22:07:38,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 50 [2023-03-30 22:07:38,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933981698] [2023-03-30 22:07:38,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-30 22:07:38,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-03-30 22:07:38,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-03-30 22:07:38,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-03-30 22:07:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2023-03-30 22:07:38,578 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 50 states, 50 states have (on average 2.7) internal successors, (135), 49 states have internal predecessors, (135), 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) [2023-03-30 22:07:40,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-30 22:07:40,195 INFO L93 Difference]: Finished difference Result 355 states and 432 transitions. [2023-03-30 22:07:40,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-03-30 22:07:40,196 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.7) internal successors, (135), 49 states have internal predecessors, (135), 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 127 [2023-03-30 22:07:40,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-30 22:07:40,198 INFO L225 Difference]: With dead ends: 355 [2023-03-30 22:07:40,198 INFO L226 Difference]: Without dead ends: 252 [2023-03-30 22:07:40,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3433, Invalid=5687, Unknown=0, NotChecked=0, Total=9120 [2023-03-30 22:07:40,203 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 491 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 376 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 376 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-30 22:07:40,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 17 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [376 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-30 22:07:40,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-03-30 22:07:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2023-03-30 22:07:40,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.016260162601626) internal successors, (250), 246 states have internal predecessors, (250), 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) [2023-03-30 22:07:40,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 255 transitions. [2023-03-30 22:07:40,248 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 255 transitions. Word has length 127 [2023-03-30 22:07:40,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-30 22:07:40,249 INFO L495 AbstractCegarLoop]: Abstraction has 252 states and 255 transitions. [2023-03-30 22:07:40,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.7) internal successors, (135), 49 states have internal predecessors, (135), 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) [2023-03-30 22:07:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 255 transitions. [2023-03-30 22:07:40,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-03-30 22:07:40,261 INFO L187 NwaCegarLoop]: Found error trace [2023-03-30 22:07:40,261 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-30 22:07:40,270 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-30 22:07:40,467 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 [2023-03-30 22:07:40,467 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-30 22:07:40,468 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-30 22:07:40,468 INFO L85 PathProgramCache]: Analyzing trace with hash -145251825, now seen corresponding path program 5 times [2023-03-30 22:07:40,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-03-30 22:07:40,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747175809] [2023-03-30 22:07:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-30 22:07:40,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-30 22:07:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:43,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-03-30 22:07:43,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-30 22:07:43,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5313 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-03-30 22:07:43,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-03-30 22:07:43,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747175809] [2023-03-30 22:07:43,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747175809] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-30 22:07:43,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657577098] [2023-03-30 22:07:43,298 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-03-30 22:07:43,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-30 22:07:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-30 22:07:43,299 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) [2023-03-30 22:07:43,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process