/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/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 01:24:39,793 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 01:24:39,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 01:24:39,827 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2023-04-02 01:24:39,870 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 [2023-04-02 01:24:39,903 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 01:24:39,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 01:24:39,904 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 01:24:39,904 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 01:24:39,904 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 01:24:39,904 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 01:24:39,905 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-04-02 01:24:39,905 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-04-02 01:24:39,905 INFO L138 SettingsManager]: * Use SBE=true [2023-04-02 01:24:39,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 01:24:39,905 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 01:24:39,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 01:24:39,906 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 01:24:39,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:24:39,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 01:24:39,907 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-04-02 01:24:39,908 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-04-02 01:24:39,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2023-04-02 01:24:40,148 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 01:24:40,169 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 01:24:40,171 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 01:24:40,172 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 01:24:40,172 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 01:24:40,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-04-02 01:24:41,320 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 01:24:41,491 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 01:24:41,492 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-acceleration/phases_1-2.c [2023-04-02 01:24:41,496 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abbe2c01/70ca0ea38d254f59b5a197c1ed0255c6/FLAGe6933cb8b [2023-04-02 01:24:41,508 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7abbe2c01/70ca0ea38d254f59b5a197c1ed0255c6 [2023-04-02 01:24:41,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 01:24:41,511 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 01:24:41,512 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 01:24:41,512 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 01:24:41,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 01:24:41,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,516 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70f2569d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41, skipping insertion in model container [2023-04-02 01:24:41,517 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,522 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 01:24:41,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 01:24:41,643 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/loop-acceleration/phases_1-2.c[322,335] [2023-04-02 01:24:41,653 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:24:41,661 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 01:24:41,671 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/loop-acceleration/phases_1-2.c[322,335] [2023-04-02 01:24:41,673 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 01:24:41,683 INFO L208 MainTranslator]: Completed translation [2023-04-02 01:24:41,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41 WrapperNode [2023-04-02 01:24:41,684 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 01:24:41,685 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 01:24:41,685 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 01:24:41,685 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 01:24:41,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,696 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,696 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,699 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 01:24:41,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 01:24:41,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 01:24:41,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 01:24:41,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (1/1) ... [2023-04-02 01:24:41,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 01:24:41,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:41,738 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) [2023-04-02 01:24:41,742 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 [2023-04-02 01:24:41,772 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 01:24:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 01:24:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 01:24:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-04-02 01:24:41,773 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 01:24:41,773 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 01:24:41,773 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 01:24:41,773 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 01:24:41,773 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 01:24:41,773 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 01:24:41,774 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 01:24:41,827 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 01:24:41,829 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 01:24:41,943 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 01:24:41,950 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 01:24:41,951 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-04-02 01:24:41,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:24:41 BoogieIcfgContainer [2023-04-02 01:24:41,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 01:24:41,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 01:24:41,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 01:24:41,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 01:24:41,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 01:24:41" (1/3) ... [2023-04-02 01:24:41,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258d19b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:24:41, skipping insertion in model container [2023-04-02 01:24:41,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 01:24:41" (2/3) ... [2023-04-02 01:24:41,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@258d19b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 01:24:41, skipping insertion in model container [2023-04-02 01:24:41,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 01:24:41" (3/3) ... [2023-04-02 01:24:41,959 INFO L112 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2023-04-02 01:24:41,979 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 01:24:41,979 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 01:24:42,038 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 01:24:42,045 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;@1d7db225, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-04-02 01:24:42,046 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 01:24:42,050 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2023-04-02 01:24:42,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:24:42,057 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:42,058 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:42,059 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:42,065 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:42,065 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 1 times [2023-04-02 01:24:42,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:42,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504818731] [2023-04-02 01:24:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:42,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:42,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:42,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504818731] [2023-04-02 01:24:42,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504818731] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:24:42,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:24:42,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-02 01:24:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365393157] [2023-04-02 01:24:42,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:24:42,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-02 01:24:42,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:42,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-02 01:24:42,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-02 01:24:42,343 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-04-02 01:24:42,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:42,392 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2023-04-02 01:24:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-02 01:24:42,394 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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 11 [2023-04-02 01:24:42,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:42,399 INFO L225 Difference]: With dead ends: 30 [2023-04-02 01:24:42,400 INFO L226 Difference]: Without dead ends: 13 [2023-04-02 01:24:42,402 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 [2023-04-02 01:24:42,406 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:42,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:24:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2023-04-02 01:24:42,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2023-04-02 01:24:42,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 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) [2023-04-02 01:24:42,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-04-02 01:24:42,436 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2023-04-02 01:24:42,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:42,436 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-04-02 01:24:42,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 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) [2023-04-02 01:24:42,436 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-04-02 01:24:42,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-04-02 01:24:42,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:42,437 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:42,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 01:24:42,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:42,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:42,438 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 1 times [2023-04-02 01:24:42,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:42,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286200213] [2023-04-02 01:24:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:42,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:42,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:42,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286200213] [2023-04-02 01:24:42,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286200213] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 01:24:42,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 01:24:42,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-04-02 01:24:42,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724712031] [2023-04-02 01:24:42,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 01:24:42,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-04-02 01:24:42,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:42,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-04-02 01:24:42,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-04-02 01:24:42,577 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-02 01:24:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:42,641 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2023-04-02 01:24:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-04-02 01:24:42,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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 11 [2023-04-02 01:24:42,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:42,643 INFO L225 Difference]: With dead ends: 22 [2023-04-02 01:24:42,643 INFO L226 Difference]: Without dead ends: 15 [2023-04-02 01:24:42,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-04-02 01:24:42,648 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:42,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 12 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-02 01:24:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-04-02 01:24:42,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-04-02 01:24:42,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 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) [2023-04-02 01:24:42,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-04-02 01:24:42,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2023-04-02 01:24:42,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:42,665 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-04-02 01:24:42,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 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) [2023-04-02 01:24:42,666 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-04-02 01:24:42,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-02 01:24:42,667 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:42,668 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:42,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-02 01:24:42,668 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:42,668 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 1 times [2023-04-02 01:24:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:42,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182533002] [2023-04-02 01:24:42,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:42,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:42,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:42,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182533002] [2023-04-02 01:24:42,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182533002] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:42,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589082017] [2023-04-02 01:24:42,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:42,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:42,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:42,857 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) [2023-04-02 01:24:42,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 01:24:42,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:42,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 01:24:42,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:42,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:42,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:43,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589082017] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:43,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:43,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2023-04-02 01:24:43,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168142385] [2023-04-02 01:24:43,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:43,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-04-02 01:24:43,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:43,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-04-02 01:24:43,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-04-02 01:24:43,022 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 01:24:43,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:43,153 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2023-04-02 01:24:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 01:24:43,154 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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 13 [2023-04-02 01:24:43,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:43,155 INFO L225 Difference]: With dead ends: 26 [2023-04-02 01:24:43,155 INFO L226 Difference]: Without dead ends: 19 [2023-04-02 01:24:43,155 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2023-04-02 01:24:43,157 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:43,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:24:43,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-02 01:24:43,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-04-02 01:24:43,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 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) [2023-04-02 01:24:43,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-04-02 01:24:43,163 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-04-02 01:24:43,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:43,163 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-04-02 01:24:43,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 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) [2023-04-02 01:24:43,164 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-04-02 01:24:43,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-02 01:24:43,164 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:43,164 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:43,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:43,371 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 [2023-04-02 01:24:43,371 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:43,372 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:43,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1870024951, now seen corresponding path program 1 times [2023-04-02 01:24:43,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:43,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088681436] [2023-04-02 01:24:43,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:43,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:43,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:43,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:43,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:43,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088681436] [2023-04-02 01:24:43,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088681436] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:43,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003713944] [2023-04-02 01:24:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:43,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:43,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:43,545 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) [2023-04-02 01:24:43,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 01:24:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:43,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2023-04-02 01:24:43,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:43,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:24:43,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003713944] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:43,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:43,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 6] total 14 [2023-04-02 01:24:43,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581620589] [2023-04-02 01:24:43,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:43,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-02 01:24:43,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:43,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-02 01:24:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2023-04-02 01:24:43,871 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:44,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:44,065 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2023-04-02 01:24:44,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-02 01:24:44,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2023-04-02 01:24:44,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:44,069 INFO L225 Difference]: With dead ends: 34 [2023-04-02 01:24:44,069 INFO L226 Difference]: Without dead ends: 23 [2023-04-02 01:24:44,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2023-04-02 01:24:44,073 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:44,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-02 01:24:44,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-02 01:24:44,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-04-02 01:24:44,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 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) [2023-04-02 01:24:44,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-04-02 01:24:44,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2023-04-02 01:24:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:44,089 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-04-02 01:24:44,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 11 states have internal predecessors, (29), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-04-02 01:24:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-04-02 01:24:44,090 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:44,090 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:44,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:44,302 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 [2023-04-02 01:24:44,302 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:44,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:44,303 INFO L85 PathProgramCache]: Analyzing trace with hash -555382060, now seen corresponding path program 2 times [2023-04-02 01:24:44,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:44,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560863463] [2023-04-02 01:24:44,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:44,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:44,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:44,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:44,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560863463] [2023-04-02 01:24:44,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560863463] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:44,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589903864] [2023-04-02 01:24:44,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-04-02 01:24:44,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:44,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:44,485 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) [2023-04-02 01:24:44,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 01:24:44,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-04-02 01:24:44,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:44,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjunts are in the unsatisfiable core [2023-04-02 01:24:44,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:44,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:44,601 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:44,811 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 01:24:44,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589903864] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:44,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:44,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 10] total 17 [2023-04-02 01:24:44,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560009547] [2023-04-02 01:24:44,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:44,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-04-02 01:24:44,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-04-02 01:24:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-04-02 01:24:44,814 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:45,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:45,646 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2023-04-02 01:24:45,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-04-02 01:24:45,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-04-02 01:24:45,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:45,648 INFO L225 Difference]: With dead ends: 53 [2023-04-02 01:24:45,649 INFO L226 Difference]: Without dead ends: 39 [2023-04-02 01:24:45,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2023-04-02 01:24:45,650 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:45,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 42 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:24:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-02 01:24:45,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2023-04-02 01:24:45,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 3 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) [2023-04-02 01:24:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-04-02 01:24:45,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2023-04-02 01:24:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:45,658 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-04-02 01:24:45,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:24:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-04-02 01:24:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 01:24:45,658 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:45,659 INFO L195 NwaCegarLoop]: trace histogram [8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:45,670 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:45,870 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 [2023-04-02 01:24:45,871 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:45,871 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:45,871 INFO L85 PathProgramCache]: Analyzing trace with hash -780948028, now seen corresponding path program 3 times [2023-04-02 01:24:45,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:45,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118250260] [2023-04-02 01:24:45,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:45,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:45,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:46,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:46,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:24:46,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118250260] [2023-04-02 01:24:46,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118250260] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:46,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975500813] [2023-04-02 01:24:46,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 01:24:46,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:46,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:46,058 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) [2023-04-02 01:24:46,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-02 01:24:46,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-04-02 01:24:46,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:46,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2023-04-02 01:24:46,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:46,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:24:46,238 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 35 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-04-02 01:24:46,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975500813] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:46,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:46,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 7] total 18 [2023-04-02 01:24:46,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028676525] [2023-04-02 01:24:46,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:46,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-04-02 01:24:46,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:46,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-04-02 01:24:46,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=211, Unknown=0, NotChecked=0, Total=306 [2023-04-02 01:24:46,426 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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) [2023-04-02 01:24:47,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:47,473 INFO L93 Difference]: Finished difference Result 75 states and 104 transitions. [2023-04-02 01:24:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-04-02 01:24:47,474 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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 27 [2023-04-02 01:24:47,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:47,475 INFO L225 Difference]: With dead ends: 75 [2023-04-02 01:24:47,475 INFO L226 Difference]: Without dead ends: 61 [2023-04-02 01:24:47,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2023-04-02 01:24:47,476 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 46 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:47,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 42 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:24:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-04-02 01:24:47,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2023-04-02 01:24:47,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.1777777777777778) internal successors, (53), 45 states have internal predecessors, (53), 3 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) [2023-04-02 01:24:47,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2023-04-02 01:24:47,492 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 27 [2023-04-02 01:24:47,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:47,492 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2023-04-02 01:24:47,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 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) [2023-04-02 01:24:47,492 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2023-04-02 01:24:47,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-04-02 01:24:47,493 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:47,493 INFO L195 NwaCegarLoop]: trace histogram [15, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:47,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:47,700 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 [2023-04-02 01:24:47,700 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:47,700 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:47,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1483196539, now seen corresponding path program 4 times [2023-04-02 01:24:47,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:47,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35234156] [2023-04-02 01:24:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:47,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:47,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:47,914 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 120 proven. 56 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 01:24:47,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:47,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35234156] [2023-04-02 01:24:47,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35234156] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:47,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662464608] [2023-04-02 01:24:47,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-02 01:24:47,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:47,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:47,917 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) [2023-04-02 01:24:47,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-02 01:24:47,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-02 01:24:47,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:47,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 20 conjunts are in the unsatisfiable core [2023-04-02 01:24:47,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 01:24:48,071 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 117 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-04-02 01:24:48,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662464608] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:48,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:48,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 12] total 23 [2023-04-02 01:24:48,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030877081] [2023-04-02 01:24:48,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:48,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-02 01:24:48,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:48,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-02 01:24:48,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=354, Unknown=0, NotChecked=0, Total=506 [2023-04-02 01:24:48,395 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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) [2023-04-02 01:24:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:24:51,524 INFO L93 Difference]: Finished difference Result 104 states and 129 transitions. [2023-04-02 01:24:51,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-04-02 01:24:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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 41 [2023-04-02 01:24:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:24:51,525 INFO L225 Difference]: With dead ends: 104 [2023-04-02 01:24:51,526 INFO L226 Difference]: Without dead ends: 72 [2023-04-02 01:24:51,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=482, Invalid=1158, Unknown=0, NotChecked=0, Total=1640 [2023-04-02 01:24:51,527 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 01:24:51,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 62 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 01:24:51,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-04-02 01:24:51,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2023-04-02 01:24:51,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 3 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) [2023-04-02 01:24:51,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 79 transitions. [2023-04-02 01:24:51,544 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 79 transitions. Word has length 41 [2023-04-02 01:24:51,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:24:51,544 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 79 transitions. [2023-04-02 01:24:51,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 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) [2023-04-02 01:24:51,545 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 79 transitions. [2023-04-02 01:24:51,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-04-02 01:24:51,546 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:24:51,546 INFO L195 NwaCegarLoop]: trace histogram [25, 17, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:24:51,557 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-04-02 01:24:51,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:51,752 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:24:51,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:24:51,753 INFO L85 PathProgramCache]: Analyzing trace with hash 484696551, now seen corresponding path program 5 times [2023-04-02 01:24:51,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:24:51,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041900717] [2023-04-02 01:24:51,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:24:51,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:24:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:52,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:24:52,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:24:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 270 proven. 306 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 01:24:52,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:24:52,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041900717] [2023-04-02 01:24:52,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041900717] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:24:52,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545717283] [2023-04-02 01:24:52,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-04-02 01:24:52,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:24:52,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:24:52,355 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:24:52,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-02 01:24:54,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-04-02 01:24:54,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:24:54,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 48 conjunts are in the unsatisfiable core [2023-04-02 01:24:54,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:24:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 115 proven. 506 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:24:54,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:24:55,968 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 115 proven. 506 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:24:55,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545717283] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:24:55,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:24:55,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25, 26] total 51 [2023-04-02 01:24:55,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495231784] [2023-04-02 01:24:55,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:24:55,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-04-02 01:24:55,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:24:55,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-04-02 01:24:55,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2023-04-02 01:24:55,975 INFO L87 Difference]: Start difference. First operand 72 states and 79 transitions. Second operand has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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) [2023-04-02 01:26:49,934 WARN L223 SmtUtils]: Spent 8.30s on a formula simplification. DAG size of input: 147 DAG size of output: 21 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-04-02 01:26:49,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:26:49,990 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2023-04-02 01:26:49,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-04-02 01:26:49,990 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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 61 [2023-04-02 01:26:49,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:26:49,991 INFO L225 Difference]: With dead ends: 152 [2023-04-02 01:26:49,991 INFO L226 Difference]: Without dead ends: 120 [2023-04-02 01:26:49,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 114.5s TimeCoverageRelationStatistics Valid=2294, Invalid=6260, Unknown=2, NotChecked=0, Total=8556 [2023-04-02 01:26:49,995 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 90 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1030 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-04-02 01:26:49,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 127 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1030 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-04-02 01:26:49,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-04-02 01:26:50,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2023-04-02 01:26:50,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0695652173913044) internal successors, (123), 115 states have internal predecessors, (123), 3 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) [2023-04-02 01:26:50,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 127 transitions. [2023-04-02 01:26:50,029 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 127 transitions. Word has length 61 [2023-04-02 01:26:50,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:26:50,029 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 127 transitions. [2023-04-02 01:26:50,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.0784313725490198) internal successors, (106), 50 states have internal predecessors, (106), 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) [2023-04-02 01:26:50,029 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 127 transitions. [2023-04-02 01:26:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-04-02 01:26:50,038 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:26:50,038 INFO L195 NwaCegarLoop]: trace histogram [49, 41, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:26:50,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-04-02 01:26:50,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:26:50,246 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:26:50,246 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:26:50,246 INFO L85 PathProgramCache]: Analyzing trace with hash -397043297, now seen corresponding path program 6 times [2023-04-02 01:26:50,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:26:50,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262417163] [2023-04-02 01:26:50,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:26:50,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:26:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:26:51,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:26:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:26:51,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 630 proven. 1722 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2023-04-02 01:26:51,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:26:51,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262417163] [2023-04-02 01:26:51,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262417163] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:26:51,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059396204] [2023-04-02 01:26:51,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-04-02 01:26:51,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:26:51,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:26:51,913 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:26:51,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-02 01:26:54,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2023-04-02 01:26:54,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 01:26:54,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 30 conjunts are in the unsatisfiable core [2023-04-02 01:26:54,546 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:26:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2023-04-02 01:26:55,038 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:26:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 697 proven. 64 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2023-04-02 01:26:56,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059396204] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:26:56,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:26:56,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 11, 15] total 67 [2023-04-02 01:26:56,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063031909] [2023-04-02 01:26:56,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:26:56,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-04-02 01:26:56,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:26:56,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-04-02 01:26:56,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=952, Invalid=3470, Unknown=0, NotChecked=0, Total=4422 [2023-04-02 01:26:56,610 INFO L87 Difference]: Start difference. First operand 120 states and 127 transitions. Second operand has 67 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:27:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 01:27:33,544 INFO L93 Difference]: Finished difference Result 208 states and 258 transitions. [2023-04-02 01:27:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-04-02 01:27:33,545 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2023-04-02 01:27:33,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 01:27:33,546 INFO L225 Difference]: With dead ends: 208 [2023-04-02 01:27:33,547 INFO L226 Difference]: Without dead ends: 173 [2023-04-02 01:27:33,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2171 ImplicationChecksByTransitivity, 38.0s TimeCoverageRelationStatistics Valid=2843, Invalid=14449, Unknown=0, NotChecked=0, Total=17292 [2023-04-02 01:27:33,551 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 163 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 3027 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 3077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 3027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-04-02 01:27:33,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 87 Invalid, 3077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 3027 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-04-02 01:27:33,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-04-02 01:27:33,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 152. [2023-04-02 01:27:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.08843537414966) internal successors, (160), 147 states have internal predecessors, (160), 3 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) [2023-04-02 01:27:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 164 transitions. [2023-04-02 01:27:33,583 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 164 transitions. Word has length 109 [2023-04-02 01:27:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 01:27:33,583 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 164 transitions. [2023-04-02 01:27:33,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.0454545454545454) internal successors, (135), 65 states have internal predecessors, (135), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-04-02 01:27:33,584 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 164 transitions. [2023-04-02 01:27:33,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-04-02 01:27:33,586 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 01:27:33,586 INFO L195 NwaCegarLoop]: trace histogram [61, 43, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 01:27:33,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-02 01:27:33,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:27:33,793 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 01:27:33,794 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 01:27:33,794 INFO L85 PathProgramCache]: Analyzing trace with hash -538219929, now seen corresponding path program 7 times [2023-04-02 01:27:33,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-04-02 01:27:33,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245083026] [2023-04-02 01:27:33,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 01:27:33,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 01:27:33,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:27:35,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-04-02 01:27:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:27:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 1540 proven. 1892 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-04-02 01:27:35,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-04-02 01:27:35,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245083026] [2023-04-02 01:27:35,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245083026] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 01:27:35,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383434621] [2023-04-02 01:27:35,657 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-02 01:27:35,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 01:27:35,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 01:27:35,665 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-02 01:27:35,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-02 01:27:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 01:27:35,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 120 conjunts are in the unsatisfiable core [2023-04-02 01:27:35,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 01:27:36,715 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 295 proven. 3422 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:27:36,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 01:27:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 295 proven. 3422 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-02 01:27:43,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383434621] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 01:27:43,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 01:27:43,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 61, 62] total 123 [2023-04-02 01:27:43,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737612192] [2023-04-02 01:27:43,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 01:27:43,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-04-02 01:27:43,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-04-02 01:27:43,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-04-02 01:27:43,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3888, Invalid=11118, Unknown=0, NotChecked=0, Total=15006 [2023-04-02 01:27:43,828 INFO L87 Difference]: Start difference. First operand 152 states and 164 transitions. Second operand has 123 states, 123 states have (on average 2.032520325203252) internal successors, (250), 122 states have internal predecessors, (250), 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) [2023-04-02 01:27:48,935 WARN L839 $PredicateComparison]: unable to prove that (and (let ((.cse0 (mod (+ 2 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse0) (< .cse0 65521))) (let ((.cse1 (mod (+ 46 c_main_~x~0) 4294967296))) (or (< .cse1 65521) (<= 268435455 .cse1))) (= |c_#NULL.base| |c_old(#NULL.base)|) (let ((.cse2 (mod (+ 10 c_main_~x~0) 4294967296))) (or (< .cse2 65521) (<= 268435455 .cse2))) (let ((.cse3 (mod (+ 30 c_main_~x~0) 4294967296))) (or (< .cse3 65521) (<= 268435455 .cse3))) (let ((.cse4 (mod (+ 40 c_main_~x~0) 4294967296))) (or (< .cse4 65521) (<= 268435455 .cse4))) (let ((.cse5 (mod (+ 71 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse5) (< .cse5 65521))) (let ((.cse6 (mod (+ c_main_~x~0 54) 4294967296))) (or (<= 268435455 .cse6) (< .cse6 65521))) (let ((.cse7 (mod (+ 44 c_main_~x~0) 4294967296))) (or (< .cse7 65521) (<= 268435455 .cse7))) (< (mod c_main_~x~0 4294967296) 65521) (let ((.cse8 (mod (+ 48 c_main_~x~0) 4294967296))) (or (< .cse8 65521) (<= 268435455 .cse8))) (let ((.cse9 (mod (+ 20 c_main_~x~0) 4294967296))) (or (< .cse9 65521) (<= 268435455 .cse9))) (let ((.cse10 (mod (+ 55 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse10) (< .cse10 65521))) (let ((.cse11 (mod (+ 59 c_main_~x~0) 4294967296))) (or (< .cse11 65521) (<= 268435455 .cse11))) (let ((.cse12 (mod (+ 14 c_main_~x~0) 4294967296))) (or (< .cse12 65521) (<= 268435455 .cse12))) (let ((.cse13 (mod (+ 47 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse13) (< .cse13 65521))) (let ((.cse14 (mod (+ 26 c_main_~x~0) 4294967296))) (or (< .cse14 65521) (<= 268435455 .cse14))) (let ((.cse15 (mod (+ 28 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse15) (< .cse15 65521))) (let ((.cse16 (mod (+ c_main_~x~0 61) 4294967296))) (or (<= 268435455 .cse16) (< .cse16 65521))) (let ((.cse17 (mod (+ 65 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse17) (< .cse17 65521))) (let ((.cse18 (mod (+ 18 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse18) (< .cse18 65521))) (let ((.cse19 (mod (+ 8 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse19) (< .cse19 65521))) (let ((.cse20 (mod (+ 45 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse20) (< .cse20 65521))) (let ((.cse21 (mod (+ 43 c_main_~x~0) 4294967296))) (or (< .cse21 65521) (<= 268435455 .cse21))) (let ((.cse22 (mod (+ 58 c_main_~x~0) 4294967296))) (or (< .cse22 65521) (<= 268435455 .cse22))) (let ((.cse23 (mod (+ 38 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse23) (< .cse23 65521))) (let ((.cse24 (mod (+ 60 c_main_~x~0) 4294967296))) (or (< .cse24 65521) (<= 268435455 .cse24))) (let ((.cse25 (mod (+ 56 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse25) (< .cse25 65521))) (let ((.cse26 (mod (+ c_main_~x~0 37) 4294967296))) (or (< .cse26 65521) (<= 268435455 .cse26))) (let ((.cse27 (mod (+ 22 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse27) (< .cse27 65521))) (let ((.cse28 (mod (+ 69 c_main_~x~0) 4294967296))) (or (< .cse28 65521) (<= 268435455 .cse28))) (let ((.cse29 (mod (+ 6 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse29) (< .cse29 65521))) (let ((.cse30 (mod (+ 49 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse30) (< .cse30 65521))) (let ((.cse31 (mod (+ 12 c_main_~x~0) 4294967296))) (or (< .cse31 65521) (<= 268435455 .cse31))) (let ((.cse32 (mod (+ 66 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse32) (< .cse32 65521))) (let ((.cse33 (mod (+ 33 c_main_~x~0) 4294967296))) (or (< .cse33 65521) (<= 268435455 .cse33))) (let ((.cse34 (mod (+ 53 c_main_~x~0) 4294967296))) (or (< .cse34 65521) (<= 268435455 .cse34))) (let ((.cse35 (mod (+ c_main_~x~0 24) 4294967296))) (or (<= 268435455 .cse35) (< .cse35 65521))) (let ((.cse36 (mod (+ 36 c_main_~x~0) 4294967296))) (or (< .cse36 65521) (<= 268435455 .cse36))) (let ((.cse37 (mod (+ 39 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse37) (< .cse37 65521))) (let ((.cse38 (mod (+ 51 c_main_~x~0) 4294967296))) (or (< .cse38 65521) (<= 268435455 .cse38))) (let ((.cse39 (mod (+ 70 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse39) (< .cse39 65521))) (let ((.cse40 (mod (+ 35 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse40) (< .cse40 65521))) (let ((.cse41 (mod (+ c_main_~x~0 50) 4294967296))) (or (<= 268435455 .cse41) (< .cse41 65521))) (let ((.cse42 (mod (+ 64 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse42) (< .cse42 65521))) (let ((.cse43 (mod (+ 16 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse43) (< .cse43 65521))) (let ((.cse44 (mod (+ 73 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse44) (< .cse44 65521))) (let ((.cse45 (mod (+ 63 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse45) (< .cse45 65521))) (let ((.cse46 (mod (+ 42 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse46) (< .cse46 65521))) (let ((.cse47 (mod (+ 31 c_main_~x~0) 4294967296))) (or (< .cse47 65521) (<= 268435455 .cse47))) (let ((.cse48 (mod (+ 4 c_main_~x~0) 4294967296))) (or (< .cse48 65521) (<= 268435455 .cse48))) (let ((.cse49 (mod (+ 67 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse49) (< .cse49 65521))) (let ((.cse50 (mod (+ 34 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse50) (< .cse50 65521))) (let ((.cse51 (mod (+ 57 c_main_~x~0) 4294967296))) (or (< .cse51 65521) (<= 268435455 .cse51))) (let ((.cse52 (mod (+ 68 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse52) (< .cse52 65521))) (let ((.cse53 (mod (+ 32 c_main_~x~0) 4294967296))) (or (< .cse53 65521) (<= 268435455 .cse53))) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (let ((.cse54 (mod (+ 52 c_main_~x~0) 4294967296))) (or (< .cse54 65521) (<= 268435455 .cse54))) (let ((.cse55 (mod (+ 41 c_main_~x~0) 4294967296))) (or (< .cse55 65521) (<= 268435455 .cse55))) (let ((.cse56 (mod (+ 72 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse56) (< .cse56 65521))) (let ((.cse57 (mod (+ 62 c_main_~x~0) 4294967296))) (or (<= 268435455 .cse57) (< .cse57 65521)))) is different from false