/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_b2_o3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:42:39,391 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:42:39,394 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:42:39,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:42:39,437 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:42:39,446 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:42:39,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:42:39,452 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:42:39,454 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:42:39,457 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:42:39,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:42:39,459 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:42:39,459 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:42:39,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:42:39,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:42:39,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:42:39,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:42:39,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:42:39,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:42:39,479 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:42:39,481 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:42:39,482 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:42:39,483 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:42:39,484 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:42:39,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:42:39,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:42:39,503 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:42:39,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:42:39,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:42:39,507 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:42:39,507 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:42:39,508 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:42:39,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:42:39,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:42:39,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:42:39,514 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:42:39,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:42:39,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:42:39,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:42:39,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:42:39,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:42:39,518 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 22:42:39,560 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:42:39,560 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:42:39,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:42:39,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:42:39,563 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:42:39,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:42:39,564 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:42:39,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:42:39,565 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:42:39,565 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:42:39,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:42:39,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:42:39,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:42:39,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:42:39,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:42:39,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:42:39,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:42:39,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:42:39,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:42:39,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:42:39,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:42:39,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:42:39,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:42:39,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:42:39,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:42:39,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:42:39,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:42:39,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:42:39,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:42:39,570 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 22:42:39,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:42:39,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:42:39,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:42:39,946 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:42:39,947 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:42:39,948 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-18 22:42:40,017 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21deb2b8/c146e988ed6d4f7ea49b426a82fc8c58/FLAG7987aadc7 [2020-08-18 22:42:40,494 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:42:40,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b2_o3.c [2020-08-18 22:42:40,503 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21deb2b8/c146e988ed6d4f7ea49b426a82fc8c58/FLAG7987aadc7 [2020-08-18 22:42:40,920 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a21deb2b8/c146e988ed6d4f7ea49b426a82fc8c58 [2020-08-18 22:42:40,932 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:42:40,934 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:42:40,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:40,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:42:40,943 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:42:40,945 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:40" (1/1) ... [2020-08-18 22:42:40,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@fb81a5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:40, skipping insertion in model container [2020-08-18 22:42:40,949 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:42:40" (1/1) ... [2020-08-18 22:42:40,960 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:42:40,991 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:42:41,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:41,209 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:42:41,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:42:41,240 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:42:41,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41 WrapperNode [2020-08-18 22:42:41,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:42:41,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:42:41,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:42:41,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:42:41,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,346 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (1/1) ... [2020-08-18 22:42:41,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:42:41,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:42:41,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:42:41,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:42:41,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (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 22:42:41,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:42:41,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:42:41,428 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-18 22:42:41,428 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-18 22:42:41,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:42:41,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:42:41,430 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:42:41,633 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:42:41,633 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-18 22:42:41,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:41 BoogieIcfgContainer [2020-08-18 22:42:41,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:42:41,655 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:42:41,656 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:42:41,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:42:41,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:42:40" (1/3) ... [2020-08-18 22:42:41,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fcbfca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:41, skipping insertion in model container [2020-08-18 22:42:41,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:42:41" (2/3) ... [2020-08-18 22:42:41,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64fcbfca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:42:41, skipping insertion in model container [2020-08-18 22:42:41,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:42:41" (3/3) ... [2020-08-18 22:42:41,678 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b2_o3.c [2020-08-18 22:42:41,703 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:42:41,714 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:42:41,729 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:42:41,754 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:42:41,754 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:42:41,754 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:42:41,754 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:42:41,754 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:42:41,755 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:42:41,755 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:42:41,755 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:42:41,773 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-18 22:42:41,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-18 22:42:41,778 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:41,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:42:41,779 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:41,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:41,784 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-18 22:42:41,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:41,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480200212] [2020-08-18 22:42:41,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:41,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:42,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,062 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 22:42:42,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480200212] [2020-08-18 22:42:42,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:42,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:42,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358386000] [2020-08-18 22:42:42,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:42,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:42,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:42,085 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-18 22:42:42,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:42,138 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-18 22:42:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:42,140 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-18 22:42:42,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:42,149 INFO L225 Difference]: With dead ends: 40 [2020-08-18 22:42:42,149 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:42:42,153 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 22:42:42,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:42:42,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 22:42:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:42:42,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 22:42:42,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-18 22:42:42,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:42,198 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 22:42:42,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:42,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 22:42:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:42:42,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:42,200 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 22:42:42,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:42:42,201 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:42,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:42,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-18 22:42:42,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:42,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1134963006] [2020-08-18 22:42:42,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:42,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,350 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 22:42:42,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1134963006] [2020-08-18 22:42:42,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:42,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:42,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375764278] [2020-08-18 22:42:42,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:42,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:42,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:42,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:42,357 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-18 22:42:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:42,415 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-18 22:42:42,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:42,416 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 22:42:42,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:42,418 INFO L225 Difference]: With dead ends: 32 [2020-08-18 22:42:42,418 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 22:42:42,419 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 22:42:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 22:42:42,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 22:42:42,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:42:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-18 22:42:42,428 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-18 22:42:42,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:42,428 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-18 22:42:42,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:42,429 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-18 22:42:42,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 22:42:42,430 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:42,430 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 22:42:42,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:42:42,431 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-18 22:42:42,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:42,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440066072] [2020-08-18 22:42:42,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:42,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:42,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,715 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 22:42:42,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440066072] [2020-08-18 22:42:42,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:42,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:42:42,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498285712] [2020-08-18 22:42:42,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:42:42,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:42:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:42:42,720 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-18 22:42:42,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:42,816 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-18 22:42:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 22:42:42,818 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-18 22:42:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:42,819 INFO L225 Difference]: With dead ends: 48 [2020-08-18 22:42:42,819 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:42:42,821 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 22:42:42,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:42:42,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:42:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:42:42,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-18 22:42:42,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-18 22:42:42,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:42,839 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-18 22:42:42,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:42:42,840 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-18 22:42:42,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:42:42,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:42,844 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 22:42:42,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:42:42,845 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:42,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:42,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-18 22:42:42,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:42,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075422499] [2020-08-18 22:42:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,056 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 22:42:43,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075422499] [2020-08-18 22:42:43,057 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:42:43,057 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:42:43,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654092159] [2020-08-18 22:42:43,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:42:43,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:43,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:42:43,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:42:43,059 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-18 22:42:43,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:43,082 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-18 22:42:43,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:42:43,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-18 22:42:43,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:43,084 INFO L225 Difference]: With dead ends: 50 [2020-08-18 22:42:43,084 INFO L226 Difference]: Without dead ends: 36 [2020-08-18 22:42:43,085 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 22:42:43,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-18 22:42:43,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-18 22:42:43,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 22:42:43,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-18 22:42:43,093 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-18 22:42:43,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:43,093 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-18 22:42:43,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:42:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-18 22:42:43,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:42:43,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:43,095 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 22:42:43,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:42:43,096 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:43,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:43,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-18 22:42:43,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:43,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387098564] [2020-08-18 22:42:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:43,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,353 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 22:42:43,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387098564] [2020-08-18 22:42:43,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:43,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:42:43,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338660994] [2020-08-18 22:42:43,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:42:43,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:43,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:42:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:42:43,356 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-18 22:42:43,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:43,465 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2020-08-18 22:42:43,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:42:43,465 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-18 22:42:43,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:43,467 INFO L225 Difference]: With dead ends: 66 [2020-08-18 22:42:43,467 INFO L226 Difference]: Without dead ends: 46 [2020-08-18 22:42:43,468 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 22:42:43,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-18 22:42:43,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2020-08-18 22:42:43,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 22:42:43,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-18 22:42:43,476 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-18 22:42:43,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:43,477 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-18 22:42:43,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:42:43,477 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-18 22:42:43,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-18 22:42:43,478 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:43,478 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 22:42:43,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:42:43,479 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:43,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:43,479 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-18 22:42:43,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:43,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255821018] [2020-08-18 22:42:43,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:43,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:43,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:43,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:42:43,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255821018] [2020-08-18 22:42:43,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:43,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:42:43,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196163753] [2020-08-18 22:42:43,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:42:43,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:43,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:42:43,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:42:43,722 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 11 states. [2020-08-18 22:42:43,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:43,846 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-08-18 22:42:43,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:42:43,847 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 34 [2020-08-18 22:42:43,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:43,850 INFO L225 Difference]: With dead ends: 70 [2020-08-18 22:42:43,850 INFO L226 Difference]: Without dead ends: 52 [2020-08-18 22:42:43,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 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 22:42:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-18 22:42:43,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-18 22:42:43,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-18 22:42:43,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-18 22:42:43,872 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 34 [2020-08-18 22:42:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:43,874 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-18 22:42:43,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:42:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-18 22:42:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 22:42:43,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:42:43,878 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 22:42:43,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:42:43,878 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:42:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:42:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-18 22:42:43,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:42:43,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [724381135] [2020-08-18 22:42:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:42:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:42:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:43,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 22:42:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:44,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:44,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:44,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:44,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:44,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-18 22:42:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:42:44,245 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-18 22:42:44,246 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [724381135] [2020-08-18 22:42:44,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:42:44,247 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 22:42:44,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731430242] [2020-08-18 22:42:44,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 22:42:44,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:42:44,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 22:42:44,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-18 22:42:44,249 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 11 states. [2020-08-18 22:42:44,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:42:44,361 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-08-18 22:42:44,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 22:42:44,361 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-08-18 22:42:44,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:42:44,362 INFO L225 Difference]: With dead ends: 58 [2020-08-18 22:42:44,362 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 22:42:44,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 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 22:42:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 22:42:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 22:42:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 22:42:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 22:42:44,366 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-08-18 22:42:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:42:44,367 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 22:42:44,367 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 22:42:44,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 22:42:44,367 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 22:42:44,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 22:42:44,371 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 22:42:44,404 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 22:42:44,404 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:42:44,405 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-18 22:42:44,405 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-18 22:42:44,405 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-18 22:42:44,405 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-18 22:42:44,405 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-18 22:42:44,405 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-18 22:42:44,405 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-18 22:42:44,406 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 22:42:44,406 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 22:42:44,406 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 22:42:44,406 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 22:42:44,406 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-18 22:42:44,406 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-18 22:42:44,406 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-18 22:42:44,407 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-18 22:42:44,407 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-18 22:42:44,408 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-18 22:42:44,408 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-18 22:42:44,409 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 22:42:44,409 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-18 22:42:44,409 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-18 22:42:44,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:42:44 BoogieIcfgContainer [2020-08-18 22:42:44,421 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:42:44,424 INFO L168 Benchmark]: Toolchain (without parser) took 3488.81 ms. Allocated memory was 144.2 MB in the beginning and 240.1 MB in the end (delta: 95.9 MB). Free memory was 107.6 MB in the beginning and 175.6 MB in the end (delta: -68.1 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:44,429 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 22:42:44,430 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.22 ms. Allocated memory is still 144.2 MB. Free memory was 107.4 MB in the beginning and 97.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:44,432 INFO L168 Benchmark]: Boogie Preprocessor took 108.89 ms. Allocated memory was 144.2 MB in the beginning and 205.5 MB in the end (delta: 61.3 MB). Free memory was 97.7 MB in the beginning and 183.8 MB in the end (delta: -86.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:44,432 INFO L168 Benchmark]: RCFGBuilder took 288.96 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 171.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:44,433 INFO L168 Benchmark]: TraceAbstraction took 2765.67 ms. Allocated memory was 205.5 MB in the beginning and 240.1 MB in the end (delta: 34.6 MB). Free memory was 170.8 MB in the beginning and 175.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 29.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:42:44,444 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 144.2 MB. Free memory was 125.7 MB in the beginning and 125.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.22 ms. Allocated memory is still 144.2 MB. Free memory was 107.4 MB in the beginning and 97.7 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.89 ms. Allocated memory was 144.2 MB in the beginning and 205.5 MB in the end (delta: 61.3 MB). Free memory was 97.7 MB in the beginning and 183.8 MB in the end (delta: -86.1 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 288.96 ms. Allocated memory is still 205.5 MB. Free memory was 183.8 MB in the beginning and 171.4 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2765.67 ms. Allocated memory was 205.5 MB in the beginning and 240.1 MB in the end (delta: 34.6 MB). Free memory was 170.8 MB in the beginning and 175.6 MB in the end (delta: -4.9 MB). Peak memory consumption was 29.7 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: 2.6s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 206 SDtfs, 22 SDslu, 1143 SDs, 0 SdLazy, 250 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=6, 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, 7 MinimizatonAttempts, 20 StatesRemovedByMinimization, 5 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, 1.5s InterpolantComputationTime, 182 NumberOfCodeBlocks, 182 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 175 ConstructedInterpolants, 0 QuantifiedInterpolants, 14817 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 31/41 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...