/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/gemcutter/NewStatesSleep-VarAbsGlobalSyntactic.epf -tc ../../../trunk/examples/toolchains/AutomizerBpl.xml -i ../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/elimination_backoff_stack.line5920.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.por-optimizations-5c708e3-m [2022-09-30 02:50:12,716 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-09-30 02:50:12,718 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-09-30 02:50:12,748 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-09-30 02:50:12,748 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-09-30 02:50:12,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-09-30 02:50:12,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-09-30 02:50:12,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-09-30 02:50:12,753 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-09-30 02:50:12,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-09-30 02:50:12,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-09-30 02:50:12,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2022-09-30 02:50:12,778 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/gemcutter/NewStatesSleep-VarAbsGlobalSyntactic.epf [2022-09-30 02:50:12,798 INFO L113 SettingsManager]: Loading preferences was successful [2022-09-30 02:50:12,798 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-09-30 02:50:12,799 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-09-30 02:50:12,799 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-09-30 02:50:12,800 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-09-30 02:50:12,800 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-09-30 02:50:12,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-09-30 02:50:12,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-09-30 02:50:12,801 INFO L138 SettingsManager]: * Use SBE=true [2022-09-30 02:50:12,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-09-30 02:50:12,801 INFO L138 SettingsManager]: * sizeof long=4 [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-09-30 02:50:12,802 INFO L138 SettingsManager]: * sizeof long double=12 [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * Use constant arrays=true [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-09-30 02:50:12,803 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-09-30 02:50:12,803 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-30 02:50:12,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-09-30 02:50:12,804 INFO L138 SettingsManager]: * Abstraction used for commutativity in POR=VARIABLES_GLOBAL [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PARTIAL_ORDER_FA [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * CEGAR restart behaviour=ONE_CEGAR_PER_ERROR_LOCATION [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_NEW_STATES [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-09-30 02:50:12,805 INFO L138 SettingsManager]: * Independence relation used for POR in concurrent analysis=SYNTACTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-09-30 02:50:13,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-09-30 02:50:13,026 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-09-30 02:50:13,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-09-30 02:50:13,030 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-09-30 02:50:13,031 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-09-30 02:50:13,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/elimination_backoff_stack.line5920.bpl [2022-09-30 02:50:13,035 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/boogie-benchmarks-from-svcomp-memsafety-concurrent/elimination_backoff_stack.line5920.bpl' [2022-09-30 02:50:13,302 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-09-30 02:50:13,304 INFO L131 ToolchainWalker]: Walking toolchain with 3 elements. [2022-09-30 02:50:13,305 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-09-30 02:50:13,306 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-09-30 02:50:13,306 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-09-30 02:50:13,320 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,414 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,414 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,649 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,682 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-09-30 02:50:13,736 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-09-30 02:50:13,736 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-09-30 02:50:13,736 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-09-30 02:50:13,738 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/1) ... [2022-09-30 02:50:13,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-09-30 02:50:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-30 02:50:13,777 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) [2022-09-30 02:50:13,791 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 [2022-09-30 02:50:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush2 [2022-09-30 02:50:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush2 [2022-09-30 02:50:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush1 [2022-09-30 02:50:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush1 [2022-09-30 02:50:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure instrPush0 [2022-09-30 02:50:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPush0 [2022-09-30 02:50:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-09-30 02:50:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-09-30 02:50:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop5 [2022-09-30 02:50:13,817 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop5 [2022-09-30 02:50:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop6 [2022-09-30 02:50:13,818 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop6 [2022-09-30 02:50:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop3 [2022-09-30 02:50:13,818 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop3 [2022-09-30 02:50:13,818 INFO L130 BoogieDeclarations]: Found specification of procedure instrPop4 [2022-09-30 02:50:13,818 INFO L138 BoogieDeclarations]: Found implementation of procedure instrPop4 [2022-09-30 02:50:13,823 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-09-30 02:50:14,231 INFO L234 CfgBuilder]: Building ICFG [2022-09-30 02:50:14,233 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-09-30 02:50:19,673 INFO L275 CfgBuilder]: Performing block encoding [2022-09-30 02:50:19,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-09-30 02:50:19,729 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-09-30 02:50:19,740 INFO L202 PluginConnector]: Adding new model elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 02:50:19 BoogieIcfgContainer [2022-09-30 02:50:19,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-09-30 02:50:19,743 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-09-30 02:50:19,743 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-09-30 02:50:19,748 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-09-30 02:50:19,749 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 30.09 02:50:13" (1/2) ... [2022-09-30 02:50:19,750 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@388a3839 and model type elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.09 02:50:19, skipping insertion in model container [2022-09-30 02:50:19,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "elimination_backoff_stack.line5920.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.09 02:50:19" (2/2) ... [2022-09-30 02:50:19,751 INFO L112 eAbstractionObserver]: Analyzing ICFG elimination_backoff_stack.line5920.bpl [2022-09-30 02:50:19,759 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-09-30 02:50:19,769 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-09-30 02:50:19,769 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-09-30 02:50:19,769 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-09-30 02:50:21,070 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-09-30 02:50:21,254 INFO L100 denceProviderFactory]: Independence Relation #1: [IndependenceType=SYNTACTIC, AbstractionType=VARIABLES_GLOBAL, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-09-30 02:50:21,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 [2022-09-30 02:50:21,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-09-30 02:50:21,257 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (exit command is (exit), workingDir is null) [2022-09-30 02:50:21,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:1000 (2)] Waiting until timeout for monitored process [2022-09-30 02:50:21,307 INFO L158 artialOrderCegarLoop]: Running PartialOrderCegarLoop with 1 independence relations. [2022-09-30 02:50:21,320 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.startErr0ASSERT_VIOLATIONASSERT ======== [2022-09-30 02:50:21,329 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=PARTIAL_ORDER_FA, 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;@db915a2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-09-30 02:50:21,329 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-09-30 02:50:21,761 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT] === [2022-09-30 02:50:21,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-09-30 02:50:21,768 INFO L85 PathProgramCache]: Analyzing trace with hash -287554525, now seen corresponding path program 1 times [2022-09-30 02:50:21,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-09-30 02:50:21,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799273372] [2022-09-30 02:50:21,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-09-30 02:50:21,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-09-30 02:50:22,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-09-30 02:50:22,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-09-30 02:50:22,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-09-30 02:50:22,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799273372] [2022-09-30 02:50:22,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799273372] provided 1 perfect and 0 imperfect interpolant sequences [2022-09-30 02:50:22,996 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-09-30 02:50:22,996 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-09-30 02:50:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284410369] [2022-09-30 02:50:22,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-09-30 02:50:23,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-09-30 02:50:23,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-09-30 02:50:23,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-09-30 02:50:23,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-09-30 02:50:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-09-30 02:50:23,061 INFO L495 AbstractCegarLoop]: Abstraction has currently 0 states, but on-demand construction may add more states [2022-09-30 02:50:23,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 33.4) internal successors, (334), 11 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-09-30 02:50:23,062 INFO L154 InterpolantAutomaton]: Switched to On-DemandConstruction mode: deterministic interpolant automaton has 2 states.