/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:49:59,227 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:49:59,230 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:49:59,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:49:59,277 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:49:59,289 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:49:59,292 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:49:59,294 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:49:59,297 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:49:59,300 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:49:59,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:49:59,303 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:49:59,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:49:59,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:49:59,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:49:59,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:49:59,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:49:59,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:49:59,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:49:59,325 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:49:59,328 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:49:59,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:49:59,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:49:59,331 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:49:59,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:49:59,336 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:49:59,336 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:49:59,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:49:59,340 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:49:59,342 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 03:49:59,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 03:49:59,343 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 03:49:59,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 03:49:59,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 03:49:59,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 03:49:59,346 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 03:49:59,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 03:49:59,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 03:49:59,347 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:49:59,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:49:59,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:49:59,351 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 [2020-08-22 03:49:59,395 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:49:59,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:49:59,398 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:49:59,398 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:49:59,398 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:49:59,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:49:59,399 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:49:59,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:49:59,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:49:59,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:49:59,401 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:49:59,401 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:49:59,401 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:49:59,401 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:49:59,402 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:49:59,402 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:49:59,402 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:49:59,402 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:49:59,403 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:49:59,403 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:49:59,403 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:49:59,403 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:49:59,403 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:49:59,404 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:49:59,405 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=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:49:59,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:49:59,703 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:49:59,707 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:49:59,709 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:49:59,709 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:49:59,710 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-22 03:49:59,778 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/439f4dd08/faa0828901bf40819d54c518500b2a77/FLAGdc906d68e [2020-08-22 03:50:00,265 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:50:00,266 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-22 03:50:00,274 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/439f4dd08/faa0828901bf40819d54c518500b2a77/FLAGdc906d68e [2020-08-22 03:50:00,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/439f4dd08/faa0828901bf40819d54c518500b2a77 [2020-08-22 03:50:00,633 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:50:00,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:50:00,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:00,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:50:00,641 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:50:00,642 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:00,646 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b5b388 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00, skipping insertion in model container [2020-08-22 03:50:00,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:00,655 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:50:00,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:50:00,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:00,899 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:50:00,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:50:00,933 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:50:00,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00 WrapperNode [2020-08-22 03:50:00,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:50:00,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:50:00,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:50:00,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:50:00,950 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:00,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,038 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (1/1) ... [2020-08-22 03:50:01,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:50:01,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:50:01,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:50:01,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:50:01,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (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 [2020-08-22 03:50:01,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:50:01,124 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:50:01,124 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-22 03:50:01,124 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-22 03:50:01,124 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:50:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:50:01,124 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:50:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-22 03:50:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-22 03:50:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:50:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:50:01,125 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:50:01,331 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:50:01,332 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 03:50:01,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:01 BoogieIcfgContainer [2020-08-22 03:50:01,336 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:50:01,338 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:50:01,338 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:50:01,342 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:50:01,342 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:50:00" (1/3) ... [2020-08-22 03:50:01,343 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b0c639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:01, skipping insertion in model container [2020-08-22 03:50:01,343 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:50:00" (2/3) ... [2020-08-22 03:50:01,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51b0c639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:50:01, skipping insertion in model container [2020-08-22 03:50:01,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:50:01" (3/3) ... [2020-08-22 03:50:01,346 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-08-22 03:50:01,357 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:50:01,365 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:50:01,380 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:50:01,431 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:50:01,432 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:50:01,432 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:50:01,432 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:50:01,432 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:50:01,433 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:50:01,434 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:50:01,434 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:50:01,480 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 03:50:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 03:50:01,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:01,491 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:01,492 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:01,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:01,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-22 03:50:01,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:01,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653900902] [2020-08-22 03:50:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:01,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:01,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:01,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:01,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:01,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:50:01,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653900902] [2020-08-22 03:50:01,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:01,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:50:01,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774416993] [2020-08-22 03:50:01,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:50:01,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:01,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:50:01,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:01,819 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-22 03:50:01,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:01,939 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-22 03:50:01,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:50:01,942 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 03:50:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:01,954 INFO L225 Difference]: With dead ends: 44 [2020-08-22 03:50:01,954 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 03:50:01,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:01,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 03:50:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 03:50:02,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:50:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 03:50:02,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-22 03:50:02,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:02,014 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 03:50:02,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:50:02,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 03:50:02,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 03:50:02,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:02,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:02,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:50:02,017 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:02,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:02,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-22 03:50:02,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:02,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887610] [2020-08-22 03:50:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:02,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:02,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:02,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:50:02,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887610] [2020-08-22 03:50:02,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:50:02,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 03:50:02,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334902868] [2020-08-22 03:50:02,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 03:50:02,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:02,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 03:50:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 03:50:02,086 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-22 03:50:02,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:02,159 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-22 03:50:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 03:50:02,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 03:50:02,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:02,162 INFO L225 Difference]: With dead ends: 36 [2020-08-22 03:50:02,162 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 03:50:02,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 03:50:02,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-22 03:50:02,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 03:50:02,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-22 03:50:02,174 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-22 03:50:02,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:02,175 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-22 03:50:02,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 03:50:02,175 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-22 03:50:02,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 03:50:02,177 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:02,177 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:02,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:50:02,178 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:02,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:02,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-22 03:50:02,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:02,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114998153] [2020-08-22 03:50:02,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:02,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:02,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:02,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:50:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 03:50:02,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114998153] [2020-08-22 03:50:02,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:02,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:50:02,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561057854] [2020-08-22 03:50:02,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:50:02,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:02,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:50:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:02,357 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-22 03:50:02,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:02,454 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-22 03:50:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 03:50:02,455 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-22 03:50:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:02,457 INFO L225 Difference]: With dead ends: 58 [2020-08-22 03:50:02,457 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 03:50:02,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:02,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 03:50:02,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-22 03:50:02,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 03:50:02,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-22 03:50:02,469 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-22 03:50:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:02,470 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-22 03:50:02,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:50:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-22 03:50:02,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-22 03:50:02,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:02,472 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] [2020-08-22 03:50:02,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:50:02,473 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:02,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:02,474 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-22 03:50:02,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:02,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979141329] [2020-08-22 03:50:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-22 03:50:02,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979141329] [2020-08-22 03:50:02,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:02,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 03:50:02,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137387389] [2020-08-22 03:50:02,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 03:50:02,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:02,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 03:50:02,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:02,642 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-22 03:50:02,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:02,843 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-22 03:50:02,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:50:02,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-22 03:50:02,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:02,847 INFO L225 Difference]: With dead ends: 54 [2020-08-22 03:50:02,848 INFO L226 Difference]: Without dead ends: 50 [2020-08-22 03:50:02,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 03:50:02,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-22 03:50:02,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-22 03:50:02,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-22 03:50:02,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-22 03:50:02,862 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-22 03:50:02,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:02,862 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-22 03:50:02,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 03:50:02,862 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-22 03:50:02,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-22 03:50:02,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:02,865 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1] [2020-08-22 03:50:02,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:50:02,865 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:02,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:02,866 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-22 03:50:02,866 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:02,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205037118] [2020-08-22 03:50:02,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-22 03:50:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 03:50:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 03:50:02,972 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205037118] [2020-08-22 03:50:02,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:02,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 03:50:02,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203005549] [2020-08-22 03:50:02,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 03:50:02,974 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:02,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 03:50:02,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 03:50:02,975 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-22 03:50:03,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:03,069 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-22 03:50:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 03:50:03,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-22 03:50:03,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:03,072 INFO L225 Difference]: With dead ends: 94 [2020-08-22 03:50:03,072 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 03:50:03,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 03:50:03,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 03:50:03,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-22 03:50:03,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-22 03:50:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-22 03:50:03,086 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-22 03:50:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:03,086 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-22 03:50:03,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 03:50:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-22 03:50:03,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-22 03:50:03,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:03,089 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1] [2020-08-22 03:50:03,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:50:03,089 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:03,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:03,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-22 03:50:03,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:03,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861494312] [2020-08-22 03:50:03,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:03,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:03,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,220 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-22 03:50:03,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861494312] [2020-08-22 03:50:03,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:03,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:50:03,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903008838] [2020-08-22 03:50:03,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:03,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:03,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:03,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:03,223 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-22 03:50:03,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:03,337 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-22 03:50:03,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 03:50:03,338 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-22 03:50:03,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:03,340 INFO L225 Difference]: With dead ends: 103 [2020-08-22 03:50:03,340 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 03:50:03,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:03,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 03:50:03,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-22 03:50:03,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-22 03:50:03,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-22 03:50:03,357 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-22 03:50:03,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:03,358 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-22 03:50:03,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:03,358 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-22 03:50:03,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 03:50:03,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:03,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1] [2020-08-22 03:50:03,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:50:03,366 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:03,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:03,366 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-22 03:50:03,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:03,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142414488] [2020-08-22 03:50:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:03,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:03,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-22 03:50:03,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142414488] [2020-08-22 03:50:03,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:03,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:50:03,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431803964] [2020-08-22 03:50:03,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:03,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:03,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:03,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:03,547 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-22 03:50:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:03,746 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-22 03:50:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 03:50:03,746 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-22 03:50:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:03,748 INFO L225 Difference]: With dead ends: 86 [2020-08-22 03:50:03,748 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 03:50:03,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-22 03:50:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 03:50:03,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-22 03:50:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 03:50:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-22 03:50:03,764 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-22 03:50:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:03,765 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-22 03:50:03,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-22 03:50:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 03:50:03,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:03,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-08-22 03:50:03,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:50:03,769 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-22 03:50:03,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:03,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493663509] [2020-08-22 03:50:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 03:50:03,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:03,963 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-22 03:50:03,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493663509] [2020-08-22 03:50:03,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:03,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 03:50:03,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276052952] [2020-08-22 03:50:03,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 03:50:03,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:03,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 03:50:03,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 03:50:03,966 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-22 03:50:04,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:04,097 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-22 03:50:04,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 03:50:04,098 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-22 03:50:04,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:04,100 INFO L225 Difference]: With dead ends: 167 [2020-08-22 03:50:04,100 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 03:50:04,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:04,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 03:50:04,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-22 03:50:04,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-22 03:50:04,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-22 03:50:04,119 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-22 03:50:04,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:04,119 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-22 03:50:04,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 03:50:04,120 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-22 03:50:04,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 03:50:04,123 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:04,123 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:04,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:50:04,123 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:04,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:04,124 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-22 03:50:04,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:04,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1540157270] [2020-08-22 03:50:04,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:04,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:50:04,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,279 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 03:50:04,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1540157270] [2020-08-22 03:50:04,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:04,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 03:50:04,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377715759] [2020-08-22 03:50:04,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 03:50:04,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:04,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 03:50:04,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-22 03:50:04,282 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-22 03:50:04,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:04,518 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-22 03:50:04,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 03:50:04,519 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-22 03:50:04,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:04,522 INFO L225 Difference]: With dead ends: 188 [2020-08-22 03:50:04,522 INFO L226 Difference]: Without dead ends: 109 [2020-08-22 03:50:04,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-22 03:50:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-22 03:50:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-22 03:50:04,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-22 03:50:04,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-22 03:50:04,562 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-22 03:50:04,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:04,562 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-22 03:50:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 03:50:04,563 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-22 03:50:04,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 03:50:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:04,567 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:04,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:50:04,568 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-22 03:50:04,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:04,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395624419] [2020-08-22 03:50:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:04,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:50:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 03:50:04,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:04,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 03:50:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-22 03:50:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-22 03:50:04,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 03:50:04,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:50:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-22 03:50:04,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395624419] [2020-08-22 03:50:04,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 03:50:04,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 03:50:04,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839415893] [2020-08-22 03:50:04,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 03:50:04,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:50:04,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 03:50:04,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-22 03:50:04,818 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-22 03:50:05,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:50:05,192 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-22 03:50:05,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 03:50:05,193 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-22 03:50:05,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:50:05,195 INFO L225 Difference]: With dead ends: 199 [2020-08-22 03:50:05,195 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 03:50:05,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-22 03:50:05,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 03:50:05,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-22 03:50:05,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-22 03:50:05,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-22 03:50:05,206 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-22 03:50:05,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:50:05,207 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-22 03:50:05,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 03:50:05,207 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-22 03:50:05,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 03:50:05,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:50:05,208 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:50:05,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:50:05,209 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:50:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:50:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-22 03:50:05,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:50:05,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417001339] [2020-08-22 03:50:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:50:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 03:50:05,222 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 03:50:05,223 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 03:50:05,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:50:05,250 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:50:05 BoogieIcfgContainer [2020-08-22 03:50:05,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:50:05,253 INFO L168 Benchmark]: Toolchain (without parser) took 4617.49 ms. Allocated memory was 140.5 MB in the beginning and 244.3 MB in the end (delta: 103.8 MB). Free memory was 103.8 MB in the beginning and 100.3 MB in the end (delta: 3.5 MB). Peak memory consumption was 107.3 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,254 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,254 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,255 INFO L168 Benchmark]: Boogie Preprocessor took 108.50 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 180.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,256 INFO L168 Benchmark]: RCFGBuilder took 292.42 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 167.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,257 INFO L168 Benchmark]: TraceAbstraction took 3911.96 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 167.1 MB in the beginning and 100.3 MB in the end (delta: 66.8 MB). Peak memory consumption was 108.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:50:05,260 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.6 MB in the beginning and 93.9 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.50 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 180.6 MB in the end (delta: -86.7 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 292.42 ms. Allocated memory is still 202.9 MB. Free memory was 180.6 MB in the beginning and 167.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3911.96 ms. Allocated memory was 202.9 MB in the beginning and 244.3 MB in the end (delta: 41.4 MB). Free memory was 167.1 MB in the beginning and 100.3 MB in the end (delta: 66.8 MB). Peak memory consumption was 108.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 4; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 3 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.8s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 299 SDtfs, 239 SDslu, 1083 SDs, 0 SdLazy, 1039 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 228 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 37 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 459 NumberOfCodeBlocks, 459 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 381 ConstructedInterpolants, 0 QuantifiedInterpolants, 34013 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 191/281 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 incorrect! Received shutdown request...