/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:18:27,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:18:27,439 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:18:27,477 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:18:27,477 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:18:27,484 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:18:27,488 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:18:27,491 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:18:27,494 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:18:27,496 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:18:27,497 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:18:27,498 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:18:27,498 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:18:27,500 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:18:27,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:18:27,504 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:18:27,505 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:18:27,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:18:27,507 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:18:27,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:18:27,517 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:18:27,517 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:18:27,518 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:18:27,519 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:18:27,533 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 13:18:27,534 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 13:18:27,534 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 13:18:27,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 13:18:27,535 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 13:18:27,539 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 13:18:27,539 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 13:18:27,539 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 13:18:27,540 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 13:18:27,543 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 13:18:27,544 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 13:18:27,544 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 13:18:27,544 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 13:18:27,545 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 13:18:27,545 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:18:27,546 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:18:27,548 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:18:27,549 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 [2020-08-21 13:18:27,582 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:18:27,582 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:18:27,584 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:18:27,584 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:18:27,585 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:18:27,585 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:18:27,585 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:18:27,585 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:18:27,586 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:18:27,586 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:18:27,587 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:18:27,587 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:18:27,587 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:18:27,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:18:27,588 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:18:27,588 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:18:27,588 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:18:27,588 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:18:27,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:18:27,589 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:18:27,589 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:18:27,589 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:18:27,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:18:27,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:18:27,590 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:18:27,590 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:18:27,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:18:27,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:18:27,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:18:27,591 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 -> false [2020-08-21 13:18:27,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:18:27,900 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:18:27,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:18:27,905 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:18:27,905 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:18:27,906 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-08-21 13:18:27,963 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434779079/a2bd008367104a8b9cf9f8280af264ad/FLAG790be545c [2020-08-21 13:18:28,371 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:18:28,372 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b2_o3.c [2020-08-21 13:18:28,379 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434779079/a2bd008367104a8b9cf9f8280af264ad/FLAG790be545c [2020-08-21 13:18:28,788 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/434779079/a2bd008367104a8b9cf9f8280af264ad [2020-08-21 13:18:28,798 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:18:28,799 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:18:28,800 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:28,801 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:18:28,804 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:18:28,805 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:28" (1/1) ... [2020-08-21 13:18:28,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43965ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:28, skipping insertion in model container [2020-08-21 13:18:28,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:18:28" (1/1) ... [2020-08-21 13:18:28,816 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:18:28,832 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:18:28,994 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:28,998 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:18:29,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:18:29,024 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:18:29,024 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29 WrapperNode [2020-08-21 13:18:29,025 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:18:29,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:18:29,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:18:29,025 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:18:29,035 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,035 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,044 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,046 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,046 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (1/1) ... [2020-08-21 13:18:29,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:18:29,048 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:18:29,048 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:18:29,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:18:29,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (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 [2020-08-21 13:18:29,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:18:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:18:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 13:18:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:18:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 13:18:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:18:29,206 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 13:18:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:18:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:18:29,207 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:18:29,375 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:18:29,376 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 13:18:29,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:29 BoogieIcfgContainer [2020-08-21 13:18:29,379 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:18:29,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:18:29,382 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:18:29,386 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:18:29,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:18:28" (1/3) ... [2020-08-21 13:18:29,387 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55be5355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:29, skipping insertion in model container [2020-08-21 13:18:29,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:18:29" (2/3) ... [2020-08-21 13:18:29,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55be5355 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:18:29, skipping insertion in model container [2020-08-21 13:18:29,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:18:29" (3/3) ... [2020-08-21 13:18:29,390 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b2_o3.c [2020-08-21 13:18:29,401 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:18:29,415 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:18:29,427 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:18:29,449 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:18:29,450 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:18:29,450 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:18:29,450 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:18:29,450 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:18:29,450 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:18:29,451 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:18:29,451 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:18:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-08-21 13:18:29,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 13:18:29,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:29,474 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:29,475 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:29,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:29,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1250208381, now seen corresponding path program 1 times [2020-08-21 13:18:29,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:29,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053654160] [2020-08-21 13:18:29,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:29,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:29,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:18:29,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053654160] [2020-08-21 13:18:29,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:29,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:29,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145473948] [2020-08-21 13:18:29,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:29,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:29,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:29,827 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 5 states. [2020-08-21 13:18:29,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:29,879 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2020-08-21 13:18:29,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:29,881 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 13:18:29,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:29,892 INFO L225 Difference]: With dead ends: 33 [2020-08-21 13:18:29,892 INFO L226 Difference]: Without dead ends: 19 [2020-08-21 13:18:29,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-21 13:18:29,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-08-21 13:18:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 13:18:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-21 13:18:29,938 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2020-08-21 13:18:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:29,939 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-21 13:18:29,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-21 13:18:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:18:29,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:29,942 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:29,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:18:29,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1951994857, now seen corresponding path program 1 times [2020-08-21 13:18:29,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:29,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880719552] [2020-08-21 13:18:29,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:18:30,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880719552] [2020-08-21 13:18:30,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:18:30,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 13:18:30,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336076466] [2020-08-21 13:18:30,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 13:18:30,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:30,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 13:18:30,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 13:18:30,094 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 5 states. [2020-08-21 13:18:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:30,124 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-08-21 13:18:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 13:18:30,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 13:18:30,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:30,127 INFO L225 Difference]: With dead ends: 25 [2020-08-21 13:18:30,127 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 13:18:30,129 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 [2020-08-21 13:18:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 13:18:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-08-21 13:18:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-08-21 13:18:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-08-21 13:18:30,135 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 20 [2020-08-21 13:18:30,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:30,136 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-08-21 13:18:30,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 13:18:30,136 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-08-21 13:18:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:18:30,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:30,138 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:30,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:18:30,138 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1923365706, now seen corresponding path program 1 times [2020-08-21 13:18:30,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:30,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746665766] [2020-08-21 13:18:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:30,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 13:18:30,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746665766] [2020-08-21 13:18:30,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:30,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 13:18:30,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074062115] [2020-08-21 13:18:30,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 13:18:30,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:30,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 13:18:30,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 13:18:30,326 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 8 states. [2020-08-21 13:18:30,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:30,381 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-08-21 13:18:30,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 13:18:30,382 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 13:18:30,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:30,383 INFO L225 Difference]: With dead ends: 37 [2020-08-21 13:18:30,384 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 13:18:30,385 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 13:18:30,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 13:18:30,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2020-08-21 13:18:30,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-21 13:18:30,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-08-21 13:18:30,392 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-08-21 13:18:30,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:30,392 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-08-21 13:18:30,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 13:18:30,393 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-08-21 13:18:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:18:30,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:30,394 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:30,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:18:30,395 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:30,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:30,395 INFO L82 PathProgramCache]: Analyzing trace with hash 405472645, now seen corresponding path program 2 times [2020-08-21 13:18:30,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:30,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627694997] [2020-08-21 13:18:30,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 13:18:30,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627694997] [2020-08-21 13:18:30,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:30,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:30,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546170630] [2020-08-21 13:18:30,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:30,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:30,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:30,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:30,652 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2020-08-21 13:18:30,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:30,745 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-08-21 13:18:30,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:30,746 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 13:18:30,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:30,747 INFO L225 Difference]: With dead ends: 41 [2020-08-21 13:18:30,748 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 13:18:30,748 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 [2020-08-21 13:18:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 13:18:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-21 13:18:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 13:18:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 13:18:30,755 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 27 [2020-08-21 13:18:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:30,756 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 13:18:30,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 13:18:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 13:18:30,758 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:18:30,758 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:18:30,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:18:30,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:18:30,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:18:30,759 INFO L82 PathProgramCache]: Analyzing trace with hash -617031938, now seen corresponding path program 3 times [2020-08-21 13:18:30,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:18:30,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898068163] [2020-08-21 13:18:30,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:18:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:18:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 13:18:30,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:30,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 13:18:31,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:18:31,061 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 13:18:31,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898068163] [2020-08-21 13:18:31,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 13:18:31,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 13:18:31,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500186881] [2020-08-21 13:18:31,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 13:18:31,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:18:31,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 13:18:31,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 13:18:31,065 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 11 states. [2020-08-21 13:18:31,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:18:31,182 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-08-21 13:18:31,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 13:18:31,185 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-21 13:18:31,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:18:31,185 INFO L225 Difference]: With dead ends: 33 [2020-08-21 13:18:31,185 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:18:31,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-08-21 13:18:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:18:31,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:18:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:18:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:18:31,187 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-08-21 13:18:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:18:31,188 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:18:31,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 13:18:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:18:31,188 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:18:31,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:18:31,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:18:31,217 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:18:31,218 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:31,218 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:18:31,218 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:18:31,218 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:18:31,218 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:18:31,219 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-08-21 13:18:31,219 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-08-21 13:18:31,219 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 17) no Hoare annotation was computed. [2020-08-21 13:18:31,219 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 13:18:31,219 INFO L268 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-08-21 13:18:31,220 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-08-21 13:18:31,220 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 13:18:31,220 INFO L268 CegarLoopResult]: For program point L14-2(lines 11 17) no Hoare annotation was computed. [2020-08-21 13:18:31,220 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 9) no Hoare annotation was computed. [2020-08-21 13:18:31,220 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 9) no Hoare annotation was computed. [2020-08-21 13:18:31,221 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-08-21 13:18:31,221 INFO L268 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-08-21 13:18:31,221 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-08-21 13:18:31,221 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 13:18:31,221 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-08-21 13:18:31,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:18:31 BoogieIcfgContainer [2020-08-21 13:18:31,228 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:18:31,231 INFO L168 Benchmark]: Toolchain (without parser) took 2430.35 ms. Allocated memory was 148.9 MB in the beginning and 233.8 MB in the end (delta: 84.9 MB). Free memory was 105.2 MB in the beginning and 133.4 MB in the end (delta: -28.2 MB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,231 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 224.53 ms. Allocated memory is still 148.9 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,233 INFO L168 Benchmark]: Boogie Preprocessor took 22.68 ms. Allocated memory is still 148.9 MB. Free memory was 95.7 MB in the beginning and 94.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,234 INFO L168 Benchmark]: RCFGBuilder took 331.04 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 94.4 MB in the beginning and 173.0 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,235 INFO L168 Benchmark]: TraceAbstraction took 1845.42 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 172.4 MB in the beginning and 133.4 MB in the end (delta: 39.0 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. [2020-08-21 13:18:31,239 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 148.9 MB. Free memory was 123.4 MB in the beginning and 123.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 224.53 ms. Allocated memory is still 148.9 MB. Free memory was 105.0 MB in the beginning and 95.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 22.68 ms. Allocated memory is still 148.9 MB. Free memory was 95.7 MB in the beginning and 94.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.04 ms. Allocated memory was 148.9 MB in the beginning and 205.0 MB in the end (delta: 56.1 MB). Free memory was 94.4 MB in the beginning and 173.0 MB in the end (delta: -78.6 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1845.42 ms. Allocated memory was 205.0 MB in the beginning and 233.8 MB in the end (delta: 28.8 MB). Free memory was 172.4 MB in the beginning and 133.4 MB in the end (delta: 39.0 MB). Peak memory consumption was 67.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 4 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 4, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 97 SDtfs, 14 SDslu, 512 SDs, 0 SdLazy, 161 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=27occurred in iteration=4, 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, 5 MinimizatonAttempts, 6 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 7 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 114 NumberOfCodeBlocks, 114 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 109 ConstructedInterpolants, 0 QuantifiedInterpolants, 8905 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 34/56 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...