/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:55:09,150 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:55:09,154 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:55:09,187 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:55:09,188 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:55:09,189 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:55:09,191 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:55:09,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:55:09,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:55:09,197 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:55:09,198 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:55:09,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:55:09,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:55:09,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:55:09,203 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:55:09,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:55:09,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:55:09,206 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:55:09,216 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:55:09,219 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:55:09,221 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:55:09,222 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:55:09,223 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:55:09,224 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:55:09,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:55:09,231 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 21:55:09,232 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 21:55:09,233 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 21:55:09,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 21:55:09,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 21:55:09,235 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 21:55:09,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 21:55:09,236 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 21:55:09,236 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:55:09,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:55:09,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:55:09,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:55:09,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:55:09,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:55:09,254 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:55:09,254 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:55:09,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:55:09,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:55:09,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:55:09,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:55:09,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:55:09,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:55:09,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:55:09,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:55:09,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:55:09,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:55:09,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:55:09,257 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:55:09,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:55:09,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:55:09,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:55:09,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:55:09,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:55:09,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:55:09,258 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 21:55:09,715 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:55:09,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:55:09,739 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:55:09,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:55:09,742 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:55:09,743 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-04 21:55:09,833 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e42e3c7/7e5f191c91b744c78b0a71eb35b3b8b8/FLAGcd15e8276 [2020-09-04 21:55:10,431 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:55:10,432 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o2.c [2020-09-04 21:55:10,441 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e42e3c7/7e5f191c91b744c78b0a71eb35b3b8b8/FLAGcd15e8276 [2020-09-04 21:55:10,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d6e42e3c7/7e5f191c91b744c78b0a71eb35b3b8b8 [2020-09-04 21:55:10,779 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:55:10,781 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:55:10,783 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:55:10,783 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:55:10,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:55:10,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:55:10" (1/1) ... [2020-09-04 21:55:10,793 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4d58d449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:10, skipping insertion in model container [2020-09-04 21:55:10,794 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:55:10" (1/1) ... [2020-09-04 21:55:10,803 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:55:10,829 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:55:11,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:55:11,074 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:55:11,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:55:11,116 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:55:11,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11 WrapperNode [2020-09-04 21:55:11,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:55:11,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:55:11,119 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:55:11,119 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:55:11,138 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,147 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,245 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (1/1) ... [2020-09-04 21:55:11,252 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:55:11,253 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:55:11,253 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:55:11,253 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:55:11,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (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 [2020-09-04 21:55:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:55:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:55:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 21:55:11,341 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-09-04 21:55:11,342 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:55:11,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:55:11,343 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:55:11,583 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:55:11,584 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 21:55:11,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:55:11 BoogieIcfgContainer [2020-09-04 21:55:11,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:55:11,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:55:11,591 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:55:11,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:55:11,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:55:10" (1/3) ... [2020-09-04 21:55:11,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286a4f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:55:11, skipping insertion in model container [2020-09-04 21:55:11,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:11" (2/3) ... [2020-09-04 21:55:11,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@286a4f79 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:55:11, skipping insertion in model container [2020-09-04 21:55:11,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:55:11" (3/3) ... [2020-09-04 21:55:11,604 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o2.c [2020-09-04 21:55:11,617 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:55:11,628 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:55:11,652 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:55:11,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:55:11,683 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:55:11,683 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:55:11,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:55:11,683 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:55:11,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:55:11,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:55:11,684 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:55:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-09-04 21:55:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 21:55:11,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:11,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:11,715 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:11,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:11,723 INFO L82 PathProgramCache]: Analyzing trace with hash 875745540, now seen corresponding path program 1 times [2020-09-04 21:55:11,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:11,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550439038] [2020-09-04 21:55:11,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:11,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,040 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2020-09-04 21:55:12,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 21:55:12,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:55:12,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550439038] [2020-09-04 21:55:12,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:12,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:12,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122562508] [2020-09-04 21:55:12,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:12,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:12,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:12,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:12,180 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 5 states. [2020-09-04 21:55:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:12,294 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2020-09-04 21:55:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:12,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-04 21:55:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:12,311 INFO L225 Difference]: With dead ends: 51 [2020-09-04 21:55:12,312 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 21:55:12,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:12,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 21:55:12,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-09-04 21:55:12,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 21:55:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-04 21:55:12,373 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 16 [2020-09-04 21:55:12,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:12,374 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-04 21:55:12,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:12,374 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-04 21:55:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-04 21:55:12,377 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:12,377 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:12,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:55:12,378 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:12,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:12,378 INFO L82 PathProgramCache]: Analyzing trace with hash 71846672, now seen corresponding path program 1 times [2020-09-04 21:55:12,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:12,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120509645] [2020-09-04 21:55:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:12,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:12,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 21:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:12,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:55:12,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120509645] [2020-09-04 21:55:12,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:12,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 21:55:12,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597910443] [2020-09-04 21:55:12,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 21:55:12,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:12,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 21:55:12,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-04 21:55:12,641 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 8 states. [2020-09-04 21:55:12,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:12,797 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2020-09-04 21:55:12,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 21:55:12,798 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-09-04 21:55:12,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:12,800 INFO L225 Difference]: With dead ends: 66 [2020-09-04 21:55:12,800 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 21:55:12,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-04 21:55:12,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 21:55:12,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-04 21:55:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 21:55:12,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-09-04 21:55:12,816 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 25 [2020-09-04 21:55:12,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:12,817 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-09-04 21:55:12,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 21:55:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-09-04 21:55:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 21:55:12,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:12,819 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:12,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:55:12,820 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:12,821 INFO L82 PathProgramCache]: Analyzing trace with hash -511991682, now seen corresponding path program 1 times [2020-09-04 21:55:12,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:12,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623277611] [2020-09-04 21:55:12,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:12,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 21:55:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:12,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 21:55:13,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623277611] [2020-09-04 21:55:13,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:13,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:13,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735655002] [2020-09-04 21:55:13,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:13,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:13,043 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 5 states. [2020-09-04 21:55:13,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:13,103 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-09-04 21:55:13,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:13,104 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-04 21:55:13,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:13,106 INFO L225 Difference]: With dead ends: 69 [2020-09-04 21:55:13,106 INFO L226 Difference]: Without dead ends: 50 [2020-09-04 21:55:13,107 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:13,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-04 21:55:13,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-04 21:55:13,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 21:55:13,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 21:55:13,136 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-04 21:55:13,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:13,137 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 21:55:13,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:13,137 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 21:55:13,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 21:55:13,139 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:13,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:13,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:55:13,140 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1477652418, now seen corresponding path program 1 times [2020-09-04 21:55:13,140 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:13,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748505953] [2020-09-04 21:55:13,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:13,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-09-04 21:55:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 21:55:13,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748505953] [2020-09-04 21:55:13,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:13,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:13,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979115878] [2020-09-04 21:55:13,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:13,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:13,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:13,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:13,264 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 5 states. [2020-09-04 21:55:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:13,305 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2020-09-04 21:55:13,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:13,305 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 34 [2020-09-04 21:55:13,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:13,307 INFO L225 Difference]: With dead ends: 54 [2020-09-04 21:55:13,307 INFO L226 Difference]: Without dead ends: 49 [2020-09-04 21:55:13,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:13,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-04 21:55:13,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-09-04 21:55:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 21:55:13,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-09-04 21:55:13,319 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2020-09-04 21:55:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:13,320 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-09-04 21:55:13,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-09-04 21:55:13,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-04 21:55:13,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:13,322 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:13,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:55:13,323 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:13,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:13,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2109914946, now seen corresponding path program 1 times [2020-09-04 21:55:13,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:13,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862695553] [2020-09-04 21:55:13,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:13,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:55:13,339 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:55:13,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 21:55:13,355 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 21:55:13,382 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 21:55:13,382 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 21:55:13,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 21:55:13,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:55:13 BoogieIcfgContainer [2020-09-04 21:55:13,431 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:55:13,434 INFO L168 Benchmark]: Toolchain (without parser) took 2652.61 ms. Allocated memory was 137.9 MB in the beginning and 233.3 MB in the end (delta: 95.4 MB). Free memory was 102.3 MB in the beginning and 179.1 MB in the end (delta: -76.8 MB). Peak memory consumption was 18.6 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,435 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,436 INFO L168 Benchmark]: CACSL2BoogieTranslator took 335.44 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,437 INFO L168 Benchmark]: Boogie Preprocessor took 133.89 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,438 INFO L168 Benchmark]: RCFGBuilder took 336.23 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,439 INFO L168 Benchmark]: TraceAbstraction took 1841.25 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 166.4 MB in the beginning and 179.1 MB in the end (delta: -12.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:13,443 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 335.44 ms. Allocated memory is still 137.9 MB. Free memory was 102.1 MB in the beginning and 92.4 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 133.89 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.4 MB in the beginning and 180.5 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 336.23 ms. Allocated memory is still 201.9 MB. Free memory was 180.5 MB in the beginning and 167.1 MB in the end (delta: 13.5 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1841.25 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 166.4 MB in the beginning and 179.1 MB in the end (delta: -12.7 MB). Peak memory consumption was 18.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 25]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L22] unsigned int input = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=2, input=2] [L23] CALL, EXPR id(input) VAL [\old(x)=2] [L8] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L9] CALL, EXPR id2(x-1) VAL [\old(x)=1] [L15] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L16] CALL, EXPR id(x-1) VAL [\old(x)=0] [L8] COND TRUE x==0 VAL [\old(x)=0, x=0] [L8] return 0; VAL [\old(x)=0, \result=0, x=0] [L16] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L16] unsigned int ret = id(x-1) + 1; VAL [\old(x)=1, id(x-1)=0, ret=1, x=1] [L17] COND FALSE !(ret > 3) VAL [\old(x)=1, ret=1, x=1] [L18] return ret; VAL [\old(x)=1, \result=1, ret=1, x=1] [L9] RET, EXPR id2(x-1) VAL [\old(x)=2, id2(x-1)=1, x=2] [L9] unsigned int ret = id2(x-1) + 1; VAL [\old(x)=2, id2(x-1)=1, ret=2, x=2] [L10] COND FALSE !(ret > 3) VAL [\old(x)=2, ret=2, x=2] [L11] return ret; VAL [\old(x)=2, \result=2, ret=2, x=2] [L23] RET, EXPR id(input) VAL [id(input)=2, input=2] [L23] unsigned int result = id(input); VAL [id(input)=2, input=2, result=2] [L24] COND TRUE result == 2 VAL [input=2, result=2] [L25] __VERIFIER_error() VAL [input=2, result=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 12 SDslu, 544 SDs, 0 SdLazy, 70 SolverSat, 1 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=3, 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, 4 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 143 NumberOfCodeBlocks, 143 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 105 ConstructedInterpolants, 0 QuantifiedInterpolants, 7569 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 8/8 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...