/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-89f541c [2020-08-27 21:49:42,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-27 21:49:42,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-27 21:49:42,215 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-27 21:49:42,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-27 21:49:42,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-27 21:49:42,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-27 21:49:42,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-27 21:49:42,234 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-27 21:49:42,237 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-27 21:49:42,238 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-27 21:49:42,239 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-27 21:49:42,240 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-27 21:49:42,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-27 21:49:42,245 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-27 21:49:42,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-27 21:49:42,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-27 21:49:42,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-27 21:49:42,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-27 21:49:42,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-27 21:49:42,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-27 21:49:42,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-27 21:49:42,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-27 21:49:42,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-27 21:49:42,277 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-27 21:49:42,278 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-27 21:49:42,278 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-27 21:49:42,279 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-27 21:49:42,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-27 21:49:42,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-27 21:49:42,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-27 21:49:42,289 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-27 21:49:42,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-27 21:49:42,294 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-27 21:49:42,295 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-27 21:49:42,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-27 21:49:42,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-27 21:49:42,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-27 21:49:42,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-27 21:49:42,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-27 21:49:42,299 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-27 21:49:42,301 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 [2020-08-27 21:49:42,345 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-27 21:49:42,346 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-27 21:49:42,348 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-27 21:49:42,348 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-27 21:49:42,348 INFO L138 SettingsManager]: * Use SBE=true [2020-08-27 21:49:42,349 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-27 21:49:42,349 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-27 21:49:42,349 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-27 21:49:42,349 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-27 21:49:42,350 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-27 21:49:42,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-27 21:49:42,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-27 21:49:42,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-27 21:49:42,352 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-27 21:49:42,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-27 21:49:42,352 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-27 21:49:42,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-27 21:49:42,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-27 21:49:42,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-27 21:49:42,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-27 21:49:42,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-27 21:49:42,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-27 21:49:42,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-27 21:49:42,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-27 21:49:42,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-27 21:49:42,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-27 21:49:42,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-27 21:49:42,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-27 21:49:42,355 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-27 21:49:42,355 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-08-27 21:49:42,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-27 21:49:42,828 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-27 21:49:42,832 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-27 21:49:42,834 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-27 21:49:42,835 INFO L275 PluginConnector]: CDTParser initialized [2020-08-27 21:49:42,836 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-27 21:49:42,928 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baccfe299/7becfdb17e4d4df4bf51759e9ee8f221/FLAGdab46c670 [2020-08-27 21:49:43,476 INFO L306 CDTParser]: Found 1 translation units. [2020-08-27 21:49:43,477 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-27 21:49:43,484 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baccfe299/7becfdb17e4d4df4bf51759e9ee8f221/FLAGdab46c670 [2020-08-27 21:49:43,821 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/baccfe299/7becfdb17e4d4df4bf51759e9ee8f221 [2020-08-27 21:49:43,834 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-27 21:49:43,836 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-27 21:49:43,837 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:43,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-27 21:49:43,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-27 21:49:43,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:43" (1/1) ... [2020-08-27 21:49:43,850 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ef6092a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:43, skipping insertion in model container [2020-08-27 21:49:43,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 09:49:43" (1/1) ... [2020-08-27 21:49:43,862 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-27 21:49:43,887 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-27 21:49:44,104 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:44,109 INFO L203 MainTranslator]: Completed pre-run [2020-08-27 21:49:44,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-27 21:49:44,142 INFO L208 MainTranslator]: Completed translation [2020-08-27 21:49:44,143 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44 WrapperNode [2020-08-27 21:49:44,143 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-27 21:49:44,144 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-27 21:49:44,144 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-27 21:49:44,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-27 21:49:44,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,264 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,267 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,268 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (1/1) ... [2020-08-27 21:49:44,271 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-27 21:49:44,271 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-27 21:49:44,271 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-27 21:49:44,271 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-27 21:49:44,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (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 [2020-08-27 21:49:44,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-27 21:49:44,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-27 21:49:44,351 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-27 21:49:44,351 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-27 21:49:44,351 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-27 21:49:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-27 21:49:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-27 21:49:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-27 21:49:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-27 21:49:44,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-27 21:49:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-27 21:49:44,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-27 21:49:44,547 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-27 21:49:44,547 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-27 21:49:44,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:44 BoogieIcfgContainer [2020-08-27 21:49:44,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-27 21:49:44,553 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-27 21:49:44,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-27 21:49:44,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-27 21:49:44,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 09:49:43" (1/3) ... [2020-08-27 21:49:44,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ce9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:44, skipping insertion in model container [2020-08-27 21:49:44,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 09:49:44" (2/3) ... [2020-08-27 21:49:44,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17ce9302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 09:49:44, skipping insertion in model container [2020-08-27 21:49:44,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 09:49:44" (3/3) ... [2020-08-27 21:49:44,562 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-08-27 21:49:44,573 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-27 21:49:44,582 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-27 21:49:44,604 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-27 21:49:44,635 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-27 21:49:44,635 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-27 21:49:44,636 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-27 21:49:44,636 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-27 21:49:44,636 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-27 21:49:44,636 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-27 21:49:44,636 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-27 21:49:44,636 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-27 21:49:44,659 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-27 21:49:44,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-27 21:49:44,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:44,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:44,668 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:44,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-08-27 21:49:44,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:44,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247575022] [2020-08-27 21:49:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:44,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:44,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:44,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247575022] [2020-08-27 21:49:44,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:44,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-27 21:49:44,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717386225] [2020-08-27 21:49:44,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-27 21:49:44,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:45,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-27 21:49:45,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-27 21:49:45,018 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-08-27 21:49:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:45,113 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-27 21:49:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-27 21:49:45,116 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-27 21:49:45,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:45,130 INFO L225 Difference]: With dead ends: 36 [2020-08-27 21:49:45,131 INFO L226 Difference]: Without dead ends: 24 [2020-08-27 21:49:45,135 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 [2020-08-27 21:49:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-27 21:49:45,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-27 21:49:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-27 21:49:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-27 21:49:45,199 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-08-27 21:49:45,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:45,200 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-27 21:49:45,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-27 21:49:45,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-27 21:49:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-27 21:49:45,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:45,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:45,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-27 21:49:45,204 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:45,205 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-08-27 21:49:45,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:45,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822327460] [2020-08-27 21:49:45,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:45,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:45,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-27 21:49:45,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822327460] [2020-08-27 21:49:45,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-27 21:49:45,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-27 21:49:45,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860049462] [2020-08-27 21:49:45,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-27 21:49:45,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-27 21:49:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-27 21:49:45,400 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-27 21:49:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:45,518 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-27 21:49:45,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-27 21:49:45,519 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-27 21:49:45,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:45,520 INFO L225 Difference]: With dead ends: 33 [2020-08-27 21:49:45,520 INFO L226 Difference]: Without dead ends: 29 [2020-08-27 21:49:45,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:49:45,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-27 21:49:45,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-27 21:49:45,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-27 21:49:45,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-27 21:49:45,532 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-08-27 21:49:45,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:45,533 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-27 21:49:45,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-27 21:49:45,533 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-27 21:49:45,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-27 21:49:45,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:45,534 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] [2020-08-27 21:49:45,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-27 21:49:45,535 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:45,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:45,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-08-27 21:49:45,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:45,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026273387] [2020-08-27 21:49:45,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:45,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:45,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:45,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-27 21:49:45,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026273387] [2020-08-27 21:49:45,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:45,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-27 21:49:45,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442791471] [2020-08-27 21:49:45,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-27 21:49:45,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:45,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-27 21:49:45,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-27 21:49:45,703 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-08-27 21:49:45,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:45,801 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-08-27 21:49:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-27 21:49:45,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-27 21:49:45,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:45,803 INFO L225 Difference]: With dead ends: 39 [2020-08-27 21:49:45,804 INFO L226 Difference]: Without dead ends: 35 [2020-08-27 21:49:45,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-27 21:49:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-27 21:49:45,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-08-27 21:49:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-27 21:49:45,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-27 21:49:45,813 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-27 21:49:45,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:45,814 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-27 21:49:45,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-27 21:49:45,814 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-27 21:49:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-27 21:49:45,816 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:45,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:45,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-27 21:49:45,817 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:45,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:45,817 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-08-27 21:49:45,818 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:45,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013154967] [2020-08-27 21:49:45,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:45,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:45,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:45,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,033 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-27 21:49:46,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013154967] [2020-08-27 21:49:46,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:46,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-27 21:49:46,035 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693374060] [2020-08-27 21:49:46,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-27 21:49:46,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:46,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-27 21:49:46,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-27 21:49:46,038 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-08-27 21:49:46,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:46,177 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-27 21:49:46,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-27 21:49:46,181 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-27 21:49:46,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:46,183 INFO L225 Difference]: With dead ends: 45 [2020-08-27 21:49:46,183 INFO L226 Difference]: Without dead ends: 41 [2020-08-27 21:49:46,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-08-27 21:49:46,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-27 21:49:46,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-27 21:49:46,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-27 21:49:46,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-27 21:49:46,197 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-08-27 21:49:46,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:46,197 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-27 21:49:46,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-27 21:49:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-27 21:49:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-27 21:49:46,199 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:46,199 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:46,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-27 21:49:46,200 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:46,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:46,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-08-27 21:49:46,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:46,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330391943] [2020-08-27 21:49:46,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-27 21:49:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-27 21:49:46,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-27 21:49:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-27 21:49:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-27 21:49:46,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330391943] [2020-08-27 21:49:46,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-27 21:49:46,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-27 21:49:46,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736870482] [2020-08-27 21:49:46,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-27 21:49:46,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-27 21:49:46,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-27 21:49:46,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-27 21:49:46,456 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-08-27 21:49:46,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-27 21:49:46,592 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-08-27 21:49:46,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-27 21:49:46,595 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-27 21:49:46,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-27 21:49:46,596 INFO L225 Difference]: With dead ends: 51 [2020-08-27 21:49:46,596 INFO L226 Difference]: Without dead ends: 47 [2020-08-27 21:49:46,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-27 21:49:46,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-27 21:49:46,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-08-27 21:49:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-27 21:49:46,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-27 21:49:46,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-08-27 21:49:46,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-27 21:49:46,612 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-27 21:49:46,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-27 21:49:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-27 21:49:46,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-27 21:49:46,618 INFO L414 BasicCegarLoop]: Found error trace [2020-08-27 21:49:46,618 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-27 21:49:46,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-27 21:49:46,619 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-27 21:49:46,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-27 21:49:46,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-08-27 21:49:46,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-27 21:49:46,625 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679434673] [2020-08-27 21:49:46,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-27 21:49:46,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-27 21:49:46,656 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-27 21:49:46,657 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-27 21:49:46,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-27 21:49:46,710 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 09:49:46 BoogieIcfgContainer [2020-08-27 21:49:46,710 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-27 21:49:46,721 INFO L168 Benchmark]: Toolchain (without parser) took 2881.45 ms. Allocated memory was 147.8 MB in the beginning and 234.4 MB in the end (delta: 86.5 MB). Free memory was 104.0 MB in the beginning and 141.6 MB in the end (delta: -37.6 MB). Peak memory consumption was 48.9 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,722 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,729 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.34 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,730 INFO L168 Benchmark]: Boogie Preprocessor took 126.77 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.4 MB in the beginning and 183.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,731 INFO L168 Benchmark]: RCFGBuilder took 281.02 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 171.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,732 INFO L168 Benchmark]: TraceAbstraction took 2157.00 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 170.8 MB in the beginning and 141.6 MB in the end (delta: 29.2 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB. [2020-08-27 21:49:46,738 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 147.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.34 ms. Allocated memory is still 147.8 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.77 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.4 MB in the beginning and 183.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.02 ms. Allocated memory is still 204.5 MB. Free memory was 183.5 MB in the beginning and 171.4 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2157.00 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 170.8 MB in the beginning and 141.6 MB in the end (delta: 29.2 MB). Peak memory consumption was 59.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 21]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] int input = 5; [L19] CALL, EXPR id(input) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND FALSE !(x==0) [L14] CALL, EXPR id(x-1) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND FALSE !(x==0) [L14] CALL, EXPR id(x-1) [L8] COND FALSE !(x==0) [L9] CALL, EXPR id2(x-1) [L13] COND TRUE x==0 [L13] return 0; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L14] RET, EXPR id(x-1) [L14] return id(x-1) + 1; [L9] RET, EXPR id2(x-1) [L9] return id2(x-1) + 1; [L19] RET, EXPR id(input) [L19] int result = id(input); [L20] COND TRUE result == 5 [L21] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.0s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 71 SDslu, 374 SDs, 0 SdLazy, 210 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 26 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 168 NumberOfCodeBlocks, 168 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 120 ConstructedInterpolants, 0 QuantifiedInterpolants, 7200 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 2 PerfectInterpolantSequences, 17/34 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...