/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 02:13:32,216 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 02:13:32,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 02:13:32,260 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 02:13:32,262 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 02:13:32,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 02:13:32,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 02:13:32,271 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 02:13:32,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 02:13:32,278 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 02:13:32,279 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 02:13:32,280 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 02:13:32,280 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 02:13:32,281 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 02:13:32,282 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 02:13:32,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 02:13:32,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 02:13:32,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 02:13:32,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 02:13:32,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 02:13:32,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 02:13:32,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 02:13:32,291 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 02:13:32,292 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 02:13:32,294 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 02:13:32,302 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 02:13:32,303 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 02:13:32,303 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 02:13:32,304 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 02:13:32,326 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 02:13:32,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 02:13:32,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 02:13:32,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 02:13:32,328 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 02:13:32,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 02:13:32,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 02:13:32,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 02:13:32,329 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 02:13:32,329 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 02:13:32,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 02:13:32,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 02:13:32,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 02:13:32,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 02:13:32,330 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 02:13:32,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 02:13:32,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 02:13:32,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 02:13:32,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 02:13:32,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 02:13:32,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 02:13:32,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:13:32,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 02:13:32,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 02:13:32,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 02:13:32,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 02:13:32,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 02:13:32,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 02:13:32,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 02:13:32,334 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0;log-additional-information=true; [2020-08-22 02:13:32,628 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 02:13:32,647 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 02:13:32,653 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 02:13:32,654 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 02:13:32,655 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 02:13:32,655 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-22 02:13:32,720 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9857c794/5a62b4697d10457987663ac6511c5c41/FLAGc32ee718f [2020-08-22 02:13:33,145 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 02:13:33,146 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-22 02:13:33,153 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9857c794/5a62b4697d10457987663ac6511c5c41/FLAGc32ee718f [2020-08-22 02:13:33,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c9857c794/5a62b4697d10457987663ac6511c5c41 [2020-08-22 02:13:33,574 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 02:13:33,576 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 02:13:33,577 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 02:13:33,577 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 02:13:33,581 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 02:13:33,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,586 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2748618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33, skipping insertion in model container [2020-08-22 02:13:33,586 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,595 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 02:13:33,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 02:13:33,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:13:33,812 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 02:13:33,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 02:13:33,843 INFO L208 MainTranslator]: Completed translation [2020-08-22 02:13:33,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33 WrapperNode [2020-08-22 02:13:33,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 02:13:33,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 02:13:33,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 02:13:33,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 02:13:33,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,865 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,865 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,872 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... [2020-08-22 02:13:33,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 02:13:33,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 02:13:33,874 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 02:13:33,874 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 02:13:33,875 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 02:13:34,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 02:13:34,013 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 02:13:34,013 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 02:13:34,013 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 02:13:34,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 02:13:34,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 02:13:34,013 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 02:13:34,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 02:13:34,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 02:13:34,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 02:13:34,185 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 02:13:34,186 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 02:13:34,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:13:34 BoogieIcfgContainer [2020-08-22 02:13:34,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 02:13:34,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 02:13:34,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 02:13:34,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 02:13:34,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 02:13:33" (1/3) ... [2020-08-22 02:13:34,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d98cb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:13:34, skipping insertion in model container [2020-08-22 02:13:34,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 02:13:33" (2/3) ... [2020-08-22 02:13:34,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d98cb1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 02:13:34, skipping insertion in model container [2020-08-22 02:13:34,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 02:13:34" (3/3) ... [2020-08-22 02:13:34,198 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-22 02:13:34,206 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 02:13:34,213 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 02:13:34,227 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 02:13:34,252 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 02:13:34,252 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 02:13:34,252 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 02:13:34,253 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 02:13:34,253 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 02:13:34,253 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 02:13:34,253 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 02:13:34,253 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 02:13:34,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-22 02:13:34,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-22 02:13:34,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:34,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:34,279 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-22 02:13:34,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:34,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100876864] [2020-08-22 02:13:34,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:34,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:34,591 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-08-22 02:13:34,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:34,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:34,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 02:13:34,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100876864] [2020-08-22 02:13:34,705 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 02:13:34,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 02:13:34,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281147398] [2020-08-22 02:13:34,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 02:13:34,713 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:34,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 02:13:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:13:34,732 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-22 02:13:34,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:34,786 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-22 02:13:34,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 02:13:34,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-22 02:13:34,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:34,798 INFO L225 Difference]: With dead ends: 32 [2020-08-22 02:13:34,798 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 02:13:34,803 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 02:13:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 02:13:34,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 02:13:34,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 02:13:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 02:13:34,844 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-22 02:13:34,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:34,845 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 02:13:34,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 02:13:34,845 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 02:13:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 02:13:34,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:34,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:34,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 02:13:34,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:34,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:34,850 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-22 02:13:34,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:34,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61043895] [2020-08-22 02:13:34,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:34,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:34,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:34,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-22 02:13:35,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61043895] [2020-08-22 02:13:35,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:35,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 02:13:35,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331838632] [2020-08-22 02:13:35,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 02:13:35,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:35,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 02:13:35,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:13:35,062 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-22 02:13:35,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:35,094 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-22 02:13:35,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 02:13:35,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-22 02:13:35,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:35,096 INFO L225 Difference]: With dead ends: 25 [2020-08-22 02:13:35,096 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 02:13:35,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 02:13:35,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 02:13:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 02:13:35,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 02:13:35,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 02:13:35,104 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-22 02:13:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:35,105 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 02:13:35,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 02:13:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 02:13:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 02:13:35,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:35,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:35,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 02:13:35,107 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:35,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:35,108 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-22 02:13:35,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:35,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711038095] [2020-08-22 02:13:35,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:35,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:35,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-22 02:13:35,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711038095] [2020-08-22 02:13:35,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:35,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 02:13:35,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134845393] [2020-08-22 02:13:35,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 02:13:35,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:35,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 02:13:35,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:13:35,370 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-22 02:13:35,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:35,413 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 02:13:35,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 02:13:35,414 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-22 02:13:35,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:35,415 INFO L225 Difference]: With dead ends: 28 [2020-08-22 02:13:35,415 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 02:13:35,416 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 02:13:35,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 02:13:35,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 02:13:35,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 02:13:35,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 02:13:35,425 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-22 02:13:35,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:35,425 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 02:13:35,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 02:13:35,426 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 02:13:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-22 02:13:35,427 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:35,427 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:35,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 02:13:35,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:35,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-22 02:13:35,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:35,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467929564] [2020-08-22 02:13:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:35,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:35,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-22 02:13:35,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467929564] [2020-08-22 02:13:35,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:35,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 02:13:35,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998233432] [2020-08-22 02:13:35,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 02:13:35,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:35,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 02:13:35,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:13:35,720 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-22 02:13:35,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:35,772 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-22 02:13:35,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 02:13:35,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-22 02:13:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:35,774 INFO L225 Difference]: With dead ends: 31 [2020-08-22 02:13:35,774 INFO L226 Difference]: Without dead ends: 27 [2020-08-22 02:13:35,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-22 02:13:35,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-22 02:13:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-22 02:13:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-22 02:13:35,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-22 02:13:35,782 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-22 02:13:35,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:35,782 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-22 02:13:35,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 02:13:35,783 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-22 02:13:35,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 02:13:35,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:35,784 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:35,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 02:13:35,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:35,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:35,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-22 02:13:35,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:35,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770380563] [2020-08-22 02:13:35,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:35,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-22 02:13:36,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770380563] [2020-08-22 02:13:36,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:36,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 02:13:36,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052520996] [2020-08-22 02:13:36,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 02:13:36,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:36,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 02:13:36,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:13:36,097 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-22 02:13:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:36,175 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-22 02:13:36,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 02:13:36,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-22 02:13:36,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:36,177 INFO L225 Difference]: With dead ends: 34 [2020-08-22 02:13:36,177 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 02:13:36,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-22 02:13:36,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 02:13:36,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-22 02:13:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 02:13:36,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-22 02:13:36,184 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-22 02:13:36,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:36,185 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-22 02:13:36,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 02:13:36,185 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-22 02:13:36,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 02:13:36,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:36,187 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:36,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 02:13:36,187 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:36,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:36,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-22 02:13:36,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:36,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278344388] [2020-08-22 02:13:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:36,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,593 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-22 02:13:36,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278344388] [2020-08-22 02:13:36,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:36,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 02:13:36,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841900466] [2020-08-22 02:13:36,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 02:13:36,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:36,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 02:13:36,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:13:36,599 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-22 02:13:36,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:36,728 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-22 02:13:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 02:13:36,729 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-22 02:13:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:36,732 INFO L225 Difference]: With dead ends: 37 [2020-08-22 02:13:36,732 INFO L226 Difference]: Without dead ends: 33 [2020-08-22 02:13:36,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-22 02:13:36,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-22 02:13:36,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-22 02:13:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 02:13:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-22 02:13:36,745 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-22 02:13:36,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:36,745 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-22 02:13:36,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 02:13:36,746 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-22 02:13:36,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 02:13:36,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:36,753 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:36,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 02:13:36,754 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:36,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:36,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-22 02:13:36,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:36,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896248102] [2020-08-22 02:13:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:36,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:36,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:36,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-22 02:13:37,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896248102] [2020-08-22 02:13:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:37,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 02:13:37,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610228207] [2020-08-22 02:13:37,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 02:13:37,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 02:13:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 02:13:37,173 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-22 02:13:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:37,303 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-22 02:13:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 02:13:37,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-22 02:13:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:37,305 INFO L225 Difference]: With dead ends: 40 [2020-08-22 02:13:37,305 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 02:13:37,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-22 02:13:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 02:13:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-22 02:13:37,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-22 02:13:37,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-22 02:13:37,313 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-22 02:13:37,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:37,314 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-22 02:13:37,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 02:13:37,314 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-22 02:13:37,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 02:13:37,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:37,315 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:37,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 02:13:37,316 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:37,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:37,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-22 02:13:37,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:37,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831101276] [2020-08-22 02:13:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:37,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:37,768 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-22 02:13:37,769 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831101276] [2020-08-22 02:13:37,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:37,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 02:13:37,770 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633116218] [2020-08-22 02:13:37,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 02:13:37,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:37,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 02:13:37,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:13:37,771 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-22 02:13:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:37,956 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-22 02:13:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 02:13:37,957 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-22 02:13:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:37,958 INFO L225 Difference]: With dead ends: 43 [2020-08-22 02:13:37,958 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 02:13:37,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-22 02:13:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 02:13:37,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-22 02:13:37,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 02:13:37,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-22 02:13:37,966 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-22 02:13:37,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:37,967 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-22 02:13:37,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 02:13:37,967 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-22 02:13:37,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 02:13:37,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:37,968 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:37,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 02:13:37,969 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:37,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:37,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-22 02:13:37,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:37,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034828786] [2020-08-22 02:13:37,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:37,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:38,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,571 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-22 02:13:38,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034828786] [2020-08-22 02:13:38,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:38,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 02:13:38,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444627143] [2020-08-22 02:13:38,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 02:13:38,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 02:13:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:13:38,578 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-22 02:13:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:38,753 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-22 02:13:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 02:13:38,753 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-22 02:13:38,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:38,755 INFO L225 Difference]: With dead ends: 46 [2020-08-22 02:13:38,755 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 02:13:38,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-22 02:13:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 02:13:38,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-22 02:13:38,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 02:13:38,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-22 02:13:38,762 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-22 02:13:38,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:38,762 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-22 02:13:38,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 02:13:38,763 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-22 02:13:38,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 02:13:38,764 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:38,764 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:38,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 02:13:38,764 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:38,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:38,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-22 02:13:38,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:38,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1917852588] [2020-08-22 02:13:38,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 02:13:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 02:13:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:38,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 02:13:39,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 02:13:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-22 02:13:39,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1917852588] [2020-08-22 02:13:39,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 02:13:39,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 02:13:39,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414040715] [2020-08-22 02:13:39,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 02:13:39,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 02:13:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 02:13:39,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:13:39,387 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-22 02:13:39,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 02:13:39,598 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 02:13:39,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 02:13:39,599 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-22 02:13:39,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 02:13:39,600 INFO L225 Difference]: With dead ends: 49 [2020-08-22 02:13:39,600 INFO L226 Difference]: Without dead ends: 45 [2020-08-22 02:13:39,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-22 02:13:39,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-22 02:13:39,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-22 02:13:39,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 02:13:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-22 02:13:39,607 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-22 02:13:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 02:13:39,607 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-22 02:13:39,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 02:13:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-22 02:13:39,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 02:13:39,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 02:13:39,609 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 02:13:39,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 02:13:39,609 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 02:13:39,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 02:13:39,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-22 02:13:39,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 02:13:39,610 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932614634] [2020-08-22 02:13:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 02:13:39,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 02:13:39,652 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 02:13:39,653 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 02:13:39,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 02:13:39,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 02:13:39 BoogieIcfgContainer [2020-08-22 02:13:39,697 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 02:13:39,699 INFO L168 Benchmark]: Toolchain (without parser) took 6123.01 ms. Allocated memory was 137.9 MB in the beginning and 293.6 MB in the end (delta: 155.7 MB). Free memory was 100.9 MB in the beginning and 212.8 MB in the end (delta: -112.0 MB). Peak memory consumption was 43.8 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,700 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,703 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.17 ms. Allocated memory is still 137.9 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,705 INFO L168 Benchmark]: Boogie Preprocessor took 28.99 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,708 INFO L168 Benchmark]: RCFGBuilder took 315.48 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 168.5 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,709 INFO L168 Benchmark]: TraceAbstraction took 5506.34 ms. Allocated memory was 200.3 MB in the beginning and 293.6 MB in the end (delta: 93.3 MB). Free memory was 167.8 MB in the beginning and 212.8 MB in the end (delta: -45.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. [2020-08-22 02:13:39,717 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 267.17 ms. Allocated memory is still 137.9 MB. Free memory was 100.7 MB in the beginning and 91.4 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.99 ms. Allocated memory is still 137.9 MB. Free memory was 91.4 MB in the beginning and 90.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.48 ms. Allocated memory was 137.9 MB in the beginning and 200.3 MB in the end (delta: 62.4 MB). Free memory was 90.1 MB in the beginning and 168.5 MB in the end (delta: -78.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5506.34 ms. Allocated memory was 200.3 MB in the beginning and 293.6 MB in the end (delta: 93.3 MB). Free memory was 167.8 MB in the beginning and 212.8 MB in the end (delta: -45.0 MB). Peak memory consumption was 48.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.4s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2772 SDs, 0 SdLazy, 1181 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, 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, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 69600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 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...