/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 0.1.25-5644d1e-m [2020-08-19 06:47:44,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:47:44,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:47:44,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:47:44,130 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:47:44,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:47:44,144 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:47:44,148 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:47:44,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:47:44,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:47:44,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:47:44,157 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:47:44,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:47:44,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:47:44,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:47:44,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:47:44,167 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:47:44,168 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:47:44,170 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:47:44,180 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:47:44,182 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:47:44,183 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:47:44,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:47:44,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:47:44,198 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:47:44,203 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:47:44,203 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:47:44,204 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:47:44,205 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:47:44,205 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:47:44,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:47:44,210 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:47:44,211 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:47:44,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:47:44,217 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:47:44,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:47:44,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:47:44,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:47:44,219 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:47:44,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:47:44,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:47:44,222 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 [2020-08-19 06:47:44,268 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:47:44,269 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:47:44,271 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:47:44,271 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:47:44,272 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:47:44,272 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:47:44,272 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:47:44,273 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:47:44,273 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:47:44,273 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:47:44,274 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:47:44,274 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:47:44,274 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:47:44,275 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:47:44,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:47:44,275 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:47:44,275 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:47:44,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:47:44,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:47:44,276 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:47:44,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:47:44,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:47:44,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:47:44,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:47:44,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:47:44,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:47:44,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:47:44,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:47:44,278 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:47:44,278 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=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:47:44,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:47:44,650 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:47:44,654 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:47:44,656 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:47:44,656 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:47:44,657 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-19 06:47:44,748 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46b681dbf/244ffc6c51fd4407975eec5c43955de2/FLAGd804ce7a0 [2020-08-19 06:47:45,226 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:47:45,227 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-19 06:47:45,235 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46b681dbf/244ffc6c51fd4407975eec5c43955de2/FLAGd804ce7a0 [2020-08-19 06:47:45,576 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/46b681dbf/244ffc6c51fd4407975eec5c43955de2 [2020-08-19 06:47:45,585 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:47:45,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:47:45,589 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:45,590 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:47:45,593 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:47:45,594 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:45,597 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f88baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45, skipping insertion in model container [2020-08-19 06:47:45,598 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:45,606 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:47:45,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:47:45,866 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:45,877 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:47:45,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:45,925 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:47:45,927 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45 WrapperNode [2020-08-19 06:47:45,927 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:45,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:47:45,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:47:45,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:47:45,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:45,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:45,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:45,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:46,049 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:46,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:46,052 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (1/1) ... [2020-08-19 06:47:46,060 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:47:46,060 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:47:46,061 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:47:46,061 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:47:46,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (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 [2020-08-19 06:47:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:47:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:47:46,139 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 06:47:46,140 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 06:47:46,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:47:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:47:46,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:47:46,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 06:47:46,141 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 06:47:46,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:47:46,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:47:46,142 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:47:46,465 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:47:46,466 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:47:46,470 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:46 BoogieIcfgContainer [2020-08-19 06:47:46,470 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:47:46,471 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:47:46,471 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:47:46,475 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:47:46,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:47:45" (1/3) ... [2020-08-19 06:47:46,476 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:46, skipping insertion in model container [2020-08-19 06:47:46,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:45" (2/3) ... [2020-08-19 06:47:46,478 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c96f36e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:46, skipping insertion in model container [2020-08-19 06:47:46,478 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:46" (3/3) ... [2020-08-19 06:47:46,480 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-08-19 06:47:46,490 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:47:46,498 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:47:46,511 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:47:46,536 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:47:46,537 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:47:46,537 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:47:46,537 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:47:46,537 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:47:46,538 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:47:46,538 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:47:46,538 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:47:46,557 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 06:47:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:47:46,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:46,565 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:46,566 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:46,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:46,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 06:47:46,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:46,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932208191] [2020-08-19 06:47:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:46,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:46,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:46,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:47:46,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932208191] [2020-08-19 06:47:46,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:46,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:46,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936806264] [2020-08-19 06:47:46,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:46,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:46,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:46,832 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 06:47:46,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:46,937 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 06:47:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:46,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:47:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:46,950 INFO L225 Difference]: With dead ends: 44 [2020-08-19 06:47:46,950 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 06:47:46,954 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 [2020-08-19 06:47:46,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 06:47:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 06:47:47,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:47,004 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 06:47:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:47,004 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:47,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:47:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:47,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:47,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:47:47,009 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:47,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:47,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 06:47:47,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:47,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610527559] [2020-08-19 06:47:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:47,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:47,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:47:47,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610527559] [2020-08-19 06:47:47,091 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:47,091 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:47,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382813820] [2020-08-19 06:47:47,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:47,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:47,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:47,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:47,095 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 06:47:47,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:47,232 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 06:47:47,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:47,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 06:47:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:47,235 INFO L225 Difference]: With dead ends: 36 [2020-08-19 06:47:47,235 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 06:47:47,237 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 [2020-08-19 06:47:47,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 06:47:47,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 06:47:47,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:47,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:47,253 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 06:47:47,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:47,253 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:47,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:47,254 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:47:47,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:47,258 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] [2020-08-19 06:47:47,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:47:47,260 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 06:47:47,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:47,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1000658088] [2020-08-19 06:47:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:47,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:47,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:47,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:47,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:47:47,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1000658088] [2020-08-19 06:47:47,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:47,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:47,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95144975] [2020-08-19 06:47:47,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:47,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:47,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:47,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:47,448 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 06:47:47,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:47,539 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 06:47:47,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:47:47,540 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 06:47:47,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:47,542 INFO L225 Difference]: With dead ends: 58 [2020-08-19 06:47:47,542 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 06:47:47,544 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 [2020-08-19 06:47:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 06:47:47,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 06:47:47,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 06:47:47,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 06:47:47,555 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 06:47:47,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:47,555 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 06:47:47,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 06:47:47,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:47:47,558 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:47,558 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] [2020-08-19 06:47:47,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:47:47,558 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:47,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:47,559 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 06:47:47,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:47,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891309029] [2020-08-19 06:47:47,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,737 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:47:47,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891309029] [2020-08-19 06:47:47,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:47,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:47,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818741149] [2020-08-19 06:47:47,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:47,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:47,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:47,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:47,740 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 06:47:47,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:47,930 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 06:47:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:47,931 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 06:47:47,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:47,934 INFO L225 Difference]: With dead ends: 54 [2020-08-19 06:47:47,935 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 06:47:47,935 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 [2020-08-19 06:47:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 06:47:47,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 06:47:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:47:47,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 06:47:47,949 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 06:47:47,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:47,950 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 06:47:47,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:47,950 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 06:47:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 06:47:47,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:47,952 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] [2020-08-19 06:47:47,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:47:47,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:47,954 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 06:47:47,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:47,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1936428719] [2020-08-19 06:47:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:47,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:47,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:48,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:47:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 06:47:48,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1936428719] [2020-08-19 06:47:48,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:48,086 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:47:48,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152489273] [2020-08-19 06:47:48,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:47:48,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:48,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:47:48,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:47:48,090 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 06:47:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:48,196 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 06:47:48,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:47:48,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 06:47:48,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:48,201 INFO L225 Difference]: With dead ends: 94 [2020-08-19 06:47:48,201 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 06:47:48,205 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 [2020-08-19 06:47:48,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 06:47:48,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 06:47:48,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 06:47:48,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 06:47:48,227 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 06:47:48,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:48,227 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 06:47:48,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:47:48,227 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 06:47:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:47:48,234 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:48,234 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] [2020-08-19 06:47:48,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:47:48,238 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:48,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:48,238 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 06:47:48,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:48,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1813569142] [2020-08-19 06:47:48,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:48,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:48,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 06:47:48,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1813569142] [2020-08-19 06:47:48,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:48,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:48,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862459175] [2020-08-19 06:47:48,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:48,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:48,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:48,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:48,487 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 06:47:48,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:48,610 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 06:47:48,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:47:48,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:47:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:48,614 INFO L225 Difference]: With dead ends: 103 [2020-08-19 06:47:48,614 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:47:48,615 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 [2020-08-19 06:47:48,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:47:48,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 06:47:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:47:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 06:47:48,628 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 06:47:48,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:48,628 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 06:47:48,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:48,629 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 06:47:48,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 06:47:48,631 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:48,631 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] [2020-08-19 06:47:48,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:47:48,631 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:48,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:48,632 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 06:47:48,632 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:48,632 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129611629] [2020-08-19 06:47:48,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:48,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:48,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:48,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 06:47:48,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129611629] [2020-08-19 06:47:48,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:48,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:48,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259791357] [2020-08-19 06:47:48,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:48,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:48,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:48,755 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 06:47:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:48,948 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 06:47:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:47:48,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 06:47:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:48,964 INFO L225 Difference]: With dead ends: 86 [2020-08-19 06:47:48,965 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 06:47:48,965 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 [2020-08-19 06:47:48,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 06:47:48,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 06:47:48,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 06:47:48,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 06:47:49,001 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 06:47:49,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:49,002 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 06:47:49,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 06:47:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 06:47:49,004 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:49,005 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] [2020-08-19 06:47:49,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:47:49,005 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:49,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:49,008 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 06:47:49,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:49,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470884385] [2020-08-19 06:47:49,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:49,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:49,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:47:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,235 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-19 06:47:49,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470884385] [2020-08-19 06:47:49,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:49,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:49,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49251253] [2020-08-19 06:47:49,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:49,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:49,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:49,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:49,238 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 06:47:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:49,384 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 06:47:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:49,387 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 06:47:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:49,389 INFO L225 Difference]: With dead ends: 167 [2020-08-19 06:47:49,389 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 06:47:49,395 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 [2020-08-19 06:47:49,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 06:47:49,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 06:47:49,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 06:47:49,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 06:47:49,432 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 06:47:49,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:49,432 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 06:47:49,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:49,432 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 06:47:49,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 06:47:49,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:49,436 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] [2020-08-19 06:47:49,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:47:49,436 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:49,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:49,437 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 06:47:49,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:49,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927368219] [2020-08-19 06:47:49,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:49,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:49,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:49,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,646 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 06:47:49,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927368219] [2020-08-19 06:47:49,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:49,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:47:49,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534503460] [2020-08-19 06:47:49,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:47:49,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:49,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:47:49,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:49,652 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 06:47:49,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:49,909 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 06:47:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:47:49,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 06:47:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:49,912 INFO L225 Difference]: With dead ends: 188 [2020-08-19 06:47:49,912 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 06:47:49,913 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 [2020-08-19 06:47:49,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 06:47:49,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 06:47:49,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 06:47:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 06:47:49,931 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 06:47:49,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:49,931 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 06:47:49,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:47:49,932 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 06:47:49,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 06:47:49,935 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:49,935 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] [2020-08-19 06:47:49,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:47:49,936 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:49,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:49,936 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 06:47:49,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:49,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095873743] [2020-08-19 06:47:49,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:49,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:49,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:50,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:50,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:50,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:50,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:50,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:50,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:50,160 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 06:47:50,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095873743] [2020-08-19 06:47:50,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:50,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:47:50,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080202233] [2020-08-19 06:47:50,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:47:50,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:50,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:47:50,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:47:50,163 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 06:47:50,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:50,538 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 06:47:50,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:47:50,539 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 06:47:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:50,541 INFO L225 Difference]: With dead ends: 199 [2020-08-19 06:47:50,541 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 06:47:50,543 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 [2020-08-19 06:47:50,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 06:47:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-19 06:47:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 06:47:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-19 06:47:50,553 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-19 06:47:50,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:50,553 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-19 06:47:50,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:47:50,554 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-19 06:47:50,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:47:50,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:50,555 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] [2020-08-19 06:47:50,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:47:50,555 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:50,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:50,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-19 06:47:50,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:50,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055698183] [2020-08-19 06:47:50,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:47:50,568 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:47:50,568 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:47:50,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:47:50,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:47:50 BoogieIcfgContainer [2020-08-19 06:47:50,594 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:47:50,597 INFO L168 Benchmark]: Toolchain (without parser) took 5008.95 ms. Allocated memory was 148.4 MB in the beginning and 245.4 MB in the end (delta: 97.0 MB). Free memory was 105.1 MB in the beginning and 103.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 98.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:50,597 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 06:47:50,598 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.99 ms. Allocated memory is still 148.4 MB. Free memory was 104.8 MB in the beginning and 94.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:50,599 INFO L168 Benchmark]: Boogie Preprocessor took 131.49 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 94.7 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:50,599 INFO L168 Benchmark]: RCFGBuilder took 409.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 168.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:50,600 INFO L168 Benchmark]: TraceAbstraction took 4122.58 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 168.1 MB in the beginning and 103.2 MB in the end (delta: 65.0 MB). Peak memory consumption was 106.9 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:50,603 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 148.4 MB. Free memory was 122.9 MB in the beginning and 122.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 338.99 ms. Allocated memory is still 148.4 MB. Free memory was 104.8 MB in the beginning and 94.7 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 131.49 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 94.7 MB in the beginning and 182.1 MB in the end (delta: -87.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.78 ms. Allocated memory is still 203.4 MB. Free memory was 182.1 MB in the beginning and 168.8 MB in the end (delta: 13.3 MB). Peak memory consumption was 13.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4122.58 ms. Allocated memory was 203.4 MB in the beginning and 245.4 MB in the end (delta: 41.9 MB). Free memory was 168.1 MB in the beginning and 103.2 MB in the end (delta: 65.0 MB). Peak memory consumption was 106.9 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: 4.0s, OverallIterations: 11, TraceHistogramMax: 6, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 299 SDtfs, 239 SDslu, 1083 SDs, 0 SdLazy, 1037 SolverSat, 116 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, 0.8s 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: 0.2s AutomataMinimizationTime, 10 MinimizatonAttempts, 37 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s 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...