/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:42:43,236 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:42:43,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:42:43,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:42:43,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:42:43,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:42:43,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:42:43,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:42:43,269 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:42:43,270 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:42:43,271 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:42:43,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:42:43,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:42:43,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:42:43,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:42:43,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:42:43,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:42:43,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:42:43,279 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:42:43,281 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:42:43,283 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:42:43,284 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:42:43,285 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:42:43,286 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:42:43,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 22:42:43,300 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:42:43,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:42:43,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:42:43,302 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 22:42:43,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:42:43,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:42:43,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:42:43,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:42:43,333 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:42:43,333 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:42:43,334 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:42:43,334 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:42:43,334 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:42:43,334 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:42:43,334 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:42:43,335 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:42:43,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:42:43,336 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:42:43,336 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:42:43,336 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:42:43,337 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:42:43,337 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:42:43,337 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:42:43,337 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:42:43,337 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:42:43,337 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:42:43,338 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:42:43,339 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:42:43,339 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:42:43,339 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:42:43,339 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:42:43,339 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:42:43,340 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:42:43,340 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:42:43,629 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:42:43,641 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:42:43,645 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:42:43,646 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:42:43,647 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:42:43,647 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-18 22:42:43,723 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0821a721/07d6949199c84f9fafa60f1f3711f990/FLAG2e1c92ff5 [2020-08-18 22:42:44,167 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:42:44,168 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-18 22:42:44,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0821a721/07d6949199c84f9fafa60f1f3711f990/FLAG2e1c92ff5 [2020-08-18 22:42:44,543 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a0821a721/07d6949199c84f9fafa60f1f3711f990 [2020-08-18 22:42:44,553 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:42:44,555 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:42:44,556 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:44,557 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:42:44,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:42:44,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66409f6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44, skipping insertion in model container [2020-08-18 22:42:44,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:42:44,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:42:44,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:44,764 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:42:44,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:44,799 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:42:44,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44 WrapperNode [2020-08-18 22:42:44,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:44,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:42:44,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:42:44,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:42:44,814 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,814 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,906 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,909 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... [2020-08-18 22:42:44,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:42:44,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:42:44,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:42:44,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:42:44,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:42:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:42:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:42:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 22:42:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 22:42:44,984 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:42:44,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:42:45,186 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:42:45,186 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:42:45,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:45 BoogieIcfgContainer [2020-08-18 22:42:45,191 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:42:45,192 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:42:45,192 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:42:45,196 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:42:45,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:44" (1/3) ... [2020-08-18 22:42:45,197 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b119603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:45, skipping insertion in model container [2020-08-18 22:42:45,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:44" (2/3) ... [2020-08-18 22:42:45,198 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b119603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:45, skipping insertion in model container [2020-08-18 22:42:45,198 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:45" (3/3) ... [2020-08-18 22:42:45,200 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-18 22:42:45,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:42:45,220 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:42:45,263 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:42:45,320 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:42:45,321 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:42:45,321 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:42:45,321 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:42:45,321 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:42:45,322 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:42:45,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:42:45,322 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:42:45,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 22:42:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:42:45,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:45,350 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:45,351 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:45,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:45,356 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 22:42:45,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:45,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283963337] [2020-08-18 22:42:45,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:45,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:42:45,628 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283963337] [2020-08-18 22:42:45,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:45,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:45,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668727306] [2020-08-18 22:42:45,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:45,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:45,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:45,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:45,655 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 22:42:45,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:45,710 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 22:42:45,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:45,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:42:45,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:45,724 INFO L225 Difference]: With dead ends: 40 [2020-08-18 22:42:45,727 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:42:45,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:42:45,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 22:42:45,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:42:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 22:42:45,784 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 22:42:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:45,785 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 22:42:45,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 22:42:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:42:45,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:45,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:45,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:42:45,788 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:45,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:45,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 22:42:45,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:45,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422498440] [2020-08-18 22:42:45,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:45,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:45,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:45,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:42:45,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422498440] [2020-08-18 22:42:45,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:45,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:45,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625566013] [2020-08-18 22:42:45,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:45,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:45,951 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 22:42:45,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:45,973 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 22:42:45,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:45,974 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 22:42:45,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:45,976 INFO L225 Difference]: With dead ends: 32 [2020-08-18 22:42:45,976 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 22:42:45,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 22:42:45,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 22:42:45,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:42:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 22:42:45,986 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 22:42:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:45,987 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 22:42:45,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 22:42:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:42:45,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:45,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:45,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:42:45,989 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 22:42:45,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:45,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1829648765] [2020-08-18 22:42:45,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:42:46,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1829648765] [2020-08-18 22:42:46,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:46,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:42:46,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052201047] [2020-08-18 22:42:46,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:42:46,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:46,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:42:46,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:42:46,218 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 22:42:46,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:46,325 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 22:42:46,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:42:46,330 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 22:42:46,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:46,332 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:42:46,332 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:42:46,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-18 22:42:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:42:46,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:42:46,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:42:46,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 22:42:46,353 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 22:42:46,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:46,354 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 22:42:46,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:42:46,355 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 22:42:46,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:42:46,357 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:46,360 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:46,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:42:46,360 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:46,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:46,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 22:42:46,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:46,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708982236] [2020-08-18 22:42:46,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:46,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:46,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:42:46,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708982236] [2020-08-18 22:42:46,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:46,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:46,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415046190] [2020-08-18 22:42:46,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:46,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:46,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:46,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:46,513 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 22:42:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:46,569 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 22:42:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:46,570 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 22:42:46,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:46,571 INFO L225 Difference]: With dead ends: 50 [2020-08-18 22:42:46,572 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:42:46,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:46,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:42:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 22:42:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 22:42:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 22:42:46,580 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 22:42:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:46,581 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 22:42:46,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 22:42:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:42:46,582 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:46,583 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:46,583 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:42:46,583 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:46,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:46,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 22:42:46,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:46,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019034422] [2020-08-18 22:42:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:46,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:46,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:46,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:46,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:46,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-18 22:42:46,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019034422] [2020-08-18 22:42:46,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:46,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:42:46,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202585833] [2020-08-18 22:42:46,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:42:46,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:46,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:42:46,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:42:46,808 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 22:42:46,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:46,932 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-18 22:42:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 22:42:46,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 22:42:46,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:46,934 INFO L225 Difference]: With dead ends: 64 [2020-08-18 22:42:46,934 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 22:42:46,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-18 22:42:46,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 22:42:46,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-18 22:42:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 22:42:46,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 22:42:46,943 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 22:42:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:46,944 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 22:42:46,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:42:46,944 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 22:42:46,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:42:46,945 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:46,946 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:46,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:42:46,946 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:46,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:46,947 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 22:42:46,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:46,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397999540] [2020-08-18 22:42:46,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:47,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:42:47,235 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397999540] [2020-08-18 22:42:47,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:47,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:42:47,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170278355] [2020-08-18 22:42:47,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:42:47,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:47,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:42:47,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:42:47,238 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-18 22:42:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:47,434 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-18 22:42:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:42:47,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-18 22:42:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:47,436 INFO L225 Difference]: With dead ends: 74 [2020-08-18 22:42:47,437 INFO L226 Difference]: Without dead ends: 54 [2020-08-18 22:42:47,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:42:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-18 22:42:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-18 22:42:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-18 22:42:47,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-18 22:42:47,447 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-18 22:42:47,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:47,448 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-18 22:42:47,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:42:47,448 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-18 22:42:47,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 22:42:47,450 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:47,450 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:47,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:42:47,451 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:47,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:47,451 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 22:42:47,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:47,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248292064] [2020-08-18 22:42:47,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:47,813 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 22:42:47,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248292064] [2020-08-18 22:42:47,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:47,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:42:47,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220933455] [2020-08-18 22:42:47,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:42:47,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:42:47,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:42:47,817 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-18 22:42:47,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:47,961 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-18 22:42:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:42:47,962 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-18 22:42:47,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:47,963 INFO L225 Difference]: With dead ends: 78 [2020-08-18 22:42:47,963 INFO L226 Difference]: Without dead ends: 60 [2020-08-18 22:42:47,964 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:42:47,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-18 22:42:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-18 22:42:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 22:42:47,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-18 22:42:47,972 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-18 22:42:47,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:47,972 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-18 22:42:47,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:42:47,973 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-18 22:42:47,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 22:42:47,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:47,974 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:47,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:42:47,975 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:47,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:47,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-18 22:42:47,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:47,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111627354] [2020-08-18 22:42:47,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:48,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:48,269 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 22:42:48,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111627354] [2020-08-18 22:42:48,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:48,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 22:42:48,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889351019] [2020-08-18 22:42:48,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 22:42:48,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:48,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 22:42:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-18 22:42:48,272 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-18 22:42:48,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:48,414 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-18 22:42:48,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 22:42:48,414 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-18 22:42:48,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:48,415 INFO L225 Difference]: With dead ends: 66 [2020-08-18 22:42:48,415 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:42:48,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-18 22:42:48,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:42:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:42:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:42:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:42:48,418 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-18 22:42:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:48,418 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:42:48,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 22:42:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:42:48,419 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:42:48,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 22:42:48,421 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:42:48,446 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:42:48,446 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:42:48,446 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 22:42:48,447 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 22:42:48,447 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 22:42:48,447 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 22:42:48,447 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 22:42:48,447 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 22:42:48,447 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 22:42:48,447 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:42:48,448 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:42:48,448 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:42:48,448 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:42:48,448 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 22:42:48,448 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 22:42:48,448 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 22:42:48,449 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 22:42:48,450 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 22:42:48,450 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 22:42:48,450 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:42:48,450 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 22:42:48,450 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 22:42:48,456 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:42:48 BoogieIcfgContainer [2020-08-18 22:42:48,456 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:42:48,459 INFO L168 Benchmark]: Toolchain (without parser) took 3903.32 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 103.7 MB in the beginning and 98.7 MB in the end (delta: 5.0 MB). Peak memory consumption was 110.9 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:48,460 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:42:48,461 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:48,462 INFO L168 Benchmark]: Boogie Preprocessor took 113.13 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 182.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:48,463 INFO L168 Benchmark]: RCFGBuilder took 276.94 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:48,464 INFO L168 Benchmark]: TraceAbstraction took 3264.34 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 168.4 MB in the beginning and 98.7 MB in the end (delta: 69.7 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:48,468 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.93 ms. Allocated memory is still 140.0 MB. Free memory was 103.5 MB in the beginning and 93.4 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.13 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.4 MB in the beginning and 182.1 MB in the end (delta: -88.7 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.94 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 169.1 MB in the end (delta: 13.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3264.34 ms. Allocated memory was 203.4 MB in the beginning and 245.9 MB in the end (delta: 42.5 MB). Free memory was 168.4 MB in the beginning and 98.7 MB in the end (delta: 69.7 MB). Peak memory consumption was 112.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.1s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...