/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -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 02:45:06,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:45:06,200 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:45:06,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:45:06,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:45:06,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:45:06,255 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:45:06,259 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:45:06,262 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:45:06,265 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:45:06,266 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:45:06,267 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:45:06,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:45:06,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:45:06,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:45:06,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:45:06,277 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:45:06,278 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:45:06,280 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:45:06,289 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:45:06,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:45:06,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:45:06,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:45:06,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:45:06,312 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 02:45:06,313 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 02:45:06,313 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 02:45:06,317 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 02:45:06,318 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 02:45:06,319 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 02:45:06,319 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 02:45:06,320 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 02:45:06,321 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 02:45:06,325 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 02:45:06,326 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 02:45:06,326 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 02:45:06,331 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 02:45:06,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 02:45:06,331 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:45:06,332 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:45:06,333 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:45:06,334 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 02:45:06,376 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:45:06,376 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:45:06,379 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:45:06,379 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:45:06,379 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:45:06,380 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:45:06,380 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:45:06,380 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:45:06,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:45:06,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:45:06,382 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:45:06,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:45:06,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:45:06,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:45:06,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:45:06,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:45:06,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:45:06,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:45:06,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:45:06,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:45:06,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:45:06,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:45:06,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:45:06,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:45:06,385 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:45:06,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:45:06,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:45:06,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:45:06,386 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:45:06,386 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=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:45:06,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:45:06,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:45:06,731 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:45:06,732 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:45:06,733 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:45:06,734 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-19 02:45:06,806 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fc0ac397/c64abf47cc4a42f587173b316e2ef7c6/FLAG2bd2fc13d [2020-08-19 02:45:07,225 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:45:07,226 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-2.c [2020-08-19 02:45:07,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fc0ac397/c64abf47cc4a42f587173b316e2ef7c6/FLAG2bd2fc13d [2020-08-19 02:45:07,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5fc0ac397/c64abf47cc4a42f587173b316e2ef7c6 [2020-08-19 02:45:07,665 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:45:07,667 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:45:07,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:07,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:45:07,674 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:45:07,675 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:07,678 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26e5903c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07, skipping insertion in model container [2020-08-19 02:45:07,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:07,687 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:45:07,707 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:45:07,946 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:07,954 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:45:07,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:45:07,990 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:45:07,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07 WrapperNode [2020-08-19 02:45:07,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:45:07,992 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:45:07,992 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:45:07,992 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:45:08,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,003 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,088 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,095 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (1/1) ... [2020-08-19 02:45:08,101 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:45:08,101 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:45:08,101 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:45:08,101 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:45:08,102 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (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 02:45:08,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:45:08,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:45:08,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 02:45:08,165 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 02:45:08,165 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:45:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:45:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:45:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 02:45:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 02:45:08,166 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:45:08,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:45:08,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:45:08,371 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:45:08,372 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 02:45:08,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:08 BoogieIcfgContainer [2020-08-19 02:45:08,377 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:45:08,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:45:08,379 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:45:08,383 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:45:08,383 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:45:07" (1/3) ... [2020-08-19 02:45:08,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:08, skipping insertion in model container [2020-08-19 02:45:08,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:45:07" (2/3) ... [2020-08-19 02:45:08,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1118290e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:45:08, skipping insertion in model container [2020-08-19 02:45:08,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:45:08" (3/3) ... [2020-08-19 02:45:08,387 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-2.c [2020-08-19 02:45:08,399 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:45:08,408 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:45:08,429 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:45:08,488 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:45:08,489 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:45:08,489 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:45:08,489 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:45:08,490 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:45:08,490 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:45:08,491 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:45:08,491 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:45:08,518 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 02:45:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 02:45:08,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:08,527 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:08,528 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:08,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 02:45:08,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:08,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879504453] [2020-08-19 02:45:08,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:08,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:08,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:08,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:08,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:08,764 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 02:45:08,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879504453] [2020-08-19 02:45:08,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:08,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:08,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132394222] [2020-08-19 02:45:08,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:08,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:08,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:08,793 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 02:45:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:08,898 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 02:45:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:08,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 02:45:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:08,912 INFO L225 Difference]: With dead ends: 44 [2020-08-19 02:45:08,912 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 02:45:08,916 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 02:45:08,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 02:45:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 02:45:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:45:08,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 02:45:08,962 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 02:45:08,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:08,962 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 02:45:08,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:08,963 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 02:45:08,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:45:08,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:08,965 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:45:08,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:45:08,965 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 02:45:08,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:08,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611612938] [2020-08-19 02:45:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:08,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:09,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,044 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 02:45:09,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611612938] [2020-08-19 02:45:09,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:45:09,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:45:09,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677618757] [2020-08-19 02:45:09,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:45:09,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:09,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:45:09,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:45:09,050 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 02:45:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:09,114 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 02:45:09,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:45:09,115 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 02:45:09,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:09,117 INFO L225 Difference]: With dead ends: 36 [2020-08-19 02:45:09,117 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 02:45:09,119 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 02:45:09,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 02:45:09,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 02:45:09,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 02:45:09,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 02:45:09,129 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 02:45:09,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:09,129 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 02:45:09,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:45:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 02:45:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 02:45:09,131 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:09,132 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 02:45:09,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:45:09,132 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:09,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 02:45:09,133 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:09,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250071429] [2020-08-19 02:45:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:09,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:09,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:45:09,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,280 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 02:45:09,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250071429] [2020-08-19 02:45:09,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:09,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:09,282 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052905533] [2020-08-19 02:45:09,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:09,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:09,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:09,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:09,283 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 02:45:09,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:09,411 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 02:45:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:45:09,412 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 02:45:09,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:09,414 INFO L225 Difference]: With dead ends: 58 [2020-08-19 02:45:09,415 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 02:45:09,416 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 02:45:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 02:45:09,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 02:45:09,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 02:45:09,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 02:45:09,437 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 02:45:09,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:09,437 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 02:45:09,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:09,439 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 02:45:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 02:45:09,443 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:09,444 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 02:45:09,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:45:09,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:09,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 02:45:09,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:09,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770380563] [2020-08-19 02:45:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,648 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 02:45:09,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770380563] [2020-08-19 02:45:09,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:09,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:45:09,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721383055] [2020-08-19 02:45:09,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:45:09,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:09,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:45:09,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:45:09,654 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 02:45:09,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:09,865 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 02:45:09,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:45:09,866 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 02:45:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:09,869 INFO L225 Difference]: With dead ends: 54 [2020-08-19 02:45:09,870 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 02:45:09,871 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 02:45:09,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 02:45:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 02:45:09,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 02:45:09,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 02:45:09,885 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 02:45:09,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:09,886 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 02:45:09,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:45:09,886 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 02:45:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 02:45:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:09,889 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 02:45:09,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:45:09,889 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:09,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 02:45:09,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:09,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142717562] [2020-08-19 02:45:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:09,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:09,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:09,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 02:45:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 02:45:10,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,074 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 02:45:10,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142717562] [2020-08-19 02:45:10,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:10,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:45:10,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317019693] [2020-08-19 02:45:10,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:45:10,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:10,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:45:10,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:45:10,078 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 02:45:10,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:10,164 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 02:45:10,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:45:10,164 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 02:45:10,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:10,166 INFO L225 Difference]: With dead ends: 94 [2020-08-19 02:45:10,167 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 02:45:10,168 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 02:45:10,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 02:45:10,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 02:45:10,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 02:45:10,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 02:45:10,189 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 02:45:10,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:10,189 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 02:45:10,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:45:10,189 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 02:45:10,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 02:45:10,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:10,192 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 02:45:10,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:45:10,192 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 02:45:10,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:10,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635513301] [2020-08-19 02:45:10,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:10,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:10,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:10,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:10,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:10,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,416 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 02:45:10,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635513301] [2020-08-19 02:45:10,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:10,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:10,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922533167] [2020-08-19 02:45:10,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:10,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:10,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:10,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:10,419 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 02:45:10,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:10,543 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 02:45:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:45:10,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 02:45:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:10,546 INFO L225 Difference]: With dead ends: 103 [2020-08-19 02:45:10,546 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 02:45:10,547 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 02:45:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 02:45:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 02:45:10,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 02:45:10,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 02:45:10,558 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 02:45:10,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:10,559 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 02:45:10,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:10,559 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 02:45:10,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 02:45:10,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:10,561 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 02:45:10,561 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:45:10,562 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:10,562 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 02:45:10,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:10,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352743635] [2020-08-19 02:45:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:10,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:10,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,665 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 02:45:10,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352743635] [2020-08-19 02:45:10,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:10,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:10,666 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518583884] [2020-08-19 02:45:10,666 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:10,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:10,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:10,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:10,667 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 02:45:10,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:10,843 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 02:45:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 02:45:10,843 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 02:45:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:10,846 INFO L225 Difference]: With dead ends: 86 [2020-08-19 02:45:10,846 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 02:45:10,847 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 02:45:10,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 02:45:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 02:45:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 02:45:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 02:45:10,864 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 02:45:10,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 02:45:10,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:10,865 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 02:45:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 02:45:10,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:10,868 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 02:45:10,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:45:10,868 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:10,869 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 02:45:10,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:10,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919112644] [2020-08-19 02:45:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:10,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:10,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:10,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:11,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:11,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 02:45:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,039 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 02:45:11,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919112644] [2020-08-19 02:45:11,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:11,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 02:45:11,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349756932] [2020-08-19 02:45:11,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 02:45:11,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:11,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 02:45:11,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:45:11,042 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 02:45:11,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:11,177 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 02:45:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 02:45:11,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 02:45:11,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:11,180 INFO L225 Difference]: With dead ends: 167 [2020-08-19 02:45:11,180 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 02:45:11,181 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 02:45:11,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 02:45:11,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 02:45:11,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 02:45:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 02:45:11,199 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 02:45:11,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:11,200 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 02:45:11,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 02:45:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 02:45:11,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 02:45:11,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:11,204 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 02:45:11,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:45:11,204 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:11,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:11,205 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 02:45:11,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:11,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1603100207] [2020-08-19 02:45:11,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:11,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:11,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:11,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:11,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,363 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 02:45:11,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1603100207] [2020-08-19 02:45:11,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:11,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:45:11,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668767426] [2020-08-19 02:45:11,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:45:11,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:11,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:45:11,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:45:11,366 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 02:45:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:11,585 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 02:45:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:45:11,586 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 02:45:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:11,588 INFO L225 Difference]: With dead ends: 188 [2020-08-19 02:45:11,588 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 02:45:11,590 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 02:45:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 02:45:11,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 02:45:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 02:45:11,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 02:45:11,606 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 02:45:11,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:11,606 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 02:45:11,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:45:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 02:45:11,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 02:45:11,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:11,609 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 02:45:11,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:45:11,609 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:11,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:11,610 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 02:45:11,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:11,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201490250] [2020-08-19 02:45:11,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:45:11,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 02:45:11,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:45:11,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 02:45:11,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 02:45:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:45:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:45:11,853 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 02:45:11,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201490250] [2020-08-19 02:45:11,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:45:11,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:45:11,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154842555] [2020-08-19 02:45:11,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:45:11,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:45:11,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:45:11,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:45:11,856 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 02:45:12,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:45:12,244 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 02:45:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:45:12,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 02:45:12,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:45:12,251 INFO L225 Difference]: With dead ends: 199 [2020-08-19 02:45:12,251 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 02:45:12,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:45:12,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 02:45:12,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-19 02:45:12,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-19 02:45:12,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-19 02:45:12,271 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-19 02:45:12,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:45:12,271 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-19 02:45:12,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:45:12,271 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-19 02:45:12,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 02:45:12,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:45:12,273 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 02:45:12,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:45:12,274 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:45:12,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:45:12,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-19 02:45:12,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:45:12,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64349490] [2020-08-19 02:45:12,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:45:12,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 02:45:12,291 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 02:45:12,291 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 02:45:12,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:45:12,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:45:12 BoogieIcfgContainer [2020-08-19 02:45:12,338 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:45:12,341 INFO L168 Benchmark]: Toolchain (without parser) took 4672.69 ms. Allocated memory was 138.4 MB in the beginning and 249.6 MB in the end (delta: 111.1 MB). Free memory was 99.7 MB in the beginning and 126.7 MB in the end (delta: -27.0 MB). Peak memory consumption was 84.1 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:12,342 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:45:12,344 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.69 ms. Allocated memory is still 138.4 MB. Free memory was 99.5 MB in the beginning and 90.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:12,349 INFO L168 Benchmark]: Boogie Preprocessor took 109.13 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 180.4 MB in the end (delta: -90.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:12,350 INFO L168 Benchmark]: RCFGBuilder took 276.10 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:12,351 INFO L168 Benchmark]: TraceAbstraction took 3959.30 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 166.6 MB in the beginning and 126.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 87.6 MB. Max. memory is 7.1 GB. [2020-08-19 02:45:12,365 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 138.4 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 321.69 ms. Allocated memory is still 138.4 MB. Free memory was 99.5 MB in the beginning and 90.0 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.13 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 180.4 MB in the end (delta: -90.6 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 276.10 ms. Allocated memory is still 201.9 MB. Free memory was 180.4 MB in the beginning and 167.2 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3959.30 ms. Allocated memory was 201.9 MB in the beginning and 249.6 MB in the end (delta: 47.7 MB). Free memory was 166.6 MB in the beginning and 126.7 MB in the end (delta: 39.9 MB). Peak memory consumption was 87.6 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, 1032 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s 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, 1.4s 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...