/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=NARROWEST --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_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:21:45,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:21:45,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:21:45,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:21:45,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:21:45,140 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:21:45,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:21:45,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:21:45,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:21:45,149 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:21:45,152 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:21:45,154 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:21:45,154 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:21:45,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:21:45,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:21:45,160 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:21:45,161 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:21:45,162 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:21:45,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:21:45,173 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:21:45,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:21:45,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:21:45,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:21:45,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:21:45,184 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:21:45,195 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:21:45,196 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:21:45,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:21:45,199 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 [2020-08-21 21:21:45,244 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:21:45,244 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:21:45,246 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:21:45,246 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:21:45,246 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:21:45,246 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:21:45,247 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:21:45,247 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:21:45,247 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:21:45,247 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:21:45,248 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:21:45,249 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:21:45,249 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:21:45,249 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:21:45,249 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:21:45,249 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:21:45,250 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:21:45,250 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:21:45,250 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:21:45,250 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:21:45,251 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:21:45,251 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:21:45,251 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:21:45,251 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:21:45,251 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:21:45,251 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:21:45,252 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:21:45,252 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:21:45,252 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:21:45,252 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=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:21:45,616 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:21:45,629 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:21:45,633 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:21:45,634 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:21:45,635 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:21:45,635 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-21 21:21:45,711 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05f647f72/43ec6286514c487e8e50fc838df47a6d/FLAG530425208 [2020-08-21 21:21:46,217 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:21:46,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-21 21:21:46,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05f647f72/43ec6286514c487e8e50fc838df47a6d/FLAG530425208 [2020-08-21 21:21:46,593 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/05f647f72/43ec6286514c487e8e50fc838df47a6d [2020-08-21 21:21:46,603 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:21:46,605 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:21:46,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:46,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:21:46,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:21:46,612 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,615 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a52bb5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46, skipping insertion in model container [2020-08-21 21:21:46,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,624 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:21:46,642 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:21:46,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:46,852 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:21:46,867 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:46,882 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:21:46,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46 WrapperNode [2020-08-21 21:21:46,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:46,883 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:21:46,883 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:21:46,884 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:21:46,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,988 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,996 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (1/1) ... [2020-08-21 21:21:46,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:21:46,999 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:21:46,999 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:21:46,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:21:47,000 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (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 [2020-08-21 21:21:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:21:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:21:47,066 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 21:21:47,067 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:21:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:21:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:21:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 21:21:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:21:47,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:21:47,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:21:47,247 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:21:47,247 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:21:47,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:47 BoogieIcfgContainer [2020-08-21 21:21:47,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:21:47,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:21:47,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:21:47,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:21:47,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:21:46" (1/3) ... [2020-08-21 21:21:47,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e459d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:47, skipping insertion in model container [2020-08-21 21:21:47,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:46" (2/3) ... [2020-08-21 21:21:47,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e459d05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:47, skipping insertion in model container [2020-08-21 21:21:47,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:47" (3/3) ... [2020-08-21 21:21:47,260 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-21 21:21:47,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:21:47,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:21:47,294 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:21:47,321 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:21:47,322 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:21:47,322 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:21:47,322 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:21:47,322 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:21:47,322 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:21:47,322 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:21:47,323 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:21:47,339 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 21:21:47,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 21:21:47,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:47,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:47,347 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:47,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:47,352 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 21:21:47,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:47,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533126810] [2020-08-21 21:21:47,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:47,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:47,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:21:47,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533126810] [2020-08-21 21:21:47,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:21:47,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:21:47,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620991331] [2020-08-21 21:21:47,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:21:47,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:47,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:21:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:21:47,693 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 21:21:47,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:47,769 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 21:21:47,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:21:47,771 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 21:21:47,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:47,782 INFO L225 Difference]: With dead ends: 30 [2020-08-21 21:21:47,782 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 21:21:47,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 21:21:47,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 21:21:47,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 21:21:47,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 21:21:47,824 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 21:21:47,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:47,824 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 21:21:47,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:21:47,825 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 21:21:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 21:21:47,826 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:47,826 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:47,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:21:47,827 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:47,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:47,828 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 21:21:47,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:47,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752845552] [2020-08-21 21:21:47,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:47,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 21:21:47,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752845552] [2020-08-21 21:21:47,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:47,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:21:47,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367198635] [2020-08-21 21:21:47,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:21:47,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:47,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:21:47,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:47,954 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 21:21:48,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:48,024 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 21:21:48,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:21:48,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 21:21:48,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:48,026 INFO L225 Difference]: With dead ends: 25 [2020-08-21 21:21:48,026 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 21:21:48,028 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:48,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 21:21:48,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 21:21:48,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 21:21:48,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 21:21:48,035 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 21:21:48,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:48,035 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 21:21:48,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:21:48,036 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 21:21:48,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 21:21:48,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:48,037 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:48,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:21:48,038 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:48,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:48,038 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 21:21:48,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:48,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527661014] [2020-08-21 21:21:48,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:48,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:48,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,181 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-21 21:21:48,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527661014] [2020-08-21 21:21:48,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:48,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:48,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252794479] [2020-08-21 21:21:48,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:48,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:48,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:48,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:48,185 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 21:21:48,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:48,246 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 21:21:48,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:21:48,247 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 21:21:48,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:48,248 INFO L225 Difference]: With dead ends: 28 [2020-08-21 21:21:48,248 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 21:21:48,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 21:21:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 21:21:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 21:21:48,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 21:21:48,256 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 21:21:48,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:48,256 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 21:21:48,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 21:21:48,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 21:21:48,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:48,258 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:48,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:21:48,259 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:48,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:48,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 21:21:48,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:48,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672533690] [2020-08-21 21:21:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:48,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:48,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,484 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-21 21:21:48,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672533690] [2020-08-21 21:21:48,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:48,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:21:48,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258380771] [2020-08-21 21:21:48,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:21:48,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:48,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:21:48,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:48,488 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 21:21:48,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:48,582 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 21:21:48,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:21:48,582 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 21:21:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:48,584 INFO L225 Difference]: With dead ends: 31 [2020-08-21 21:21:48,584 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 21:21:48,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:21:48,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 21:21:48,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 21:21:48,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 21:21:48,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 21:21:48,592 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 21:21:48,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:48,593 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 21:21:48,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:21:48,593 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 21:21:48,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 21:21:48,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:48,595 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:48,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:21:48,595 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:48,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:48,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 21:21:48,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:48,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106603103] [2020-08-21 21:21:48,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:48,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:48,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-21 21:21:48,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106603103] [2020-08-21 21:21:48,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:48,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 21:21:48,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659606199] [2020-08-21 21:21:48,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 21:21:48,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:48,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 21:21:48,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:21:48,870 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 21:21:48,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:48,963 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 21:21:48,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:21:48,964 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 21:21:48,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:48,965 INFO L225 Difference]: With dead ends: 34 [2020-08-21 21:21:48,965 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 21:21:48,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:21:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 21:21:48,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 21:21:48,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 21:21:48,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 21:21:48,973 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 21:21:48,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:48,974 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 21:21:48,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 21:21:48,974 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 21:21:48,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 21:21:48,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:48,975 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:48,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:21:48,976 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:48,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 21:21:48,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:48,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1862373338] [2020-08-21 21:21:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,149 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-21 21:21:49,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1862373338] [2020-08-21 21:21:49,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:49,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:21:49,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016894737] [2020-08-21 21:21:49,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:21:49,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:49,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:21:49,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:49,152 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 21:21:49,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:49,250 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 21:21:49,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:21:49,251 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 21:21:49,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:49,252 INFO L225 Difference]: With dead ends: 37 [2020-08-21 21:21:49,252 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 21:21:49,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-21 21:21:49,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 21:21:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 21:21:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 21:21:49,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 21:21:49,260 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 21:21:49,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:49,260 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 21:21:49,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:21:49,260 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 21:21:49,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 21:21:49,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:49,262 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:49,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:21:49,263 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 21:21:49,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:49,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326368577] [2020-08-21 21:21:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,480 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-21 21:21:49,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326368577] [2020-08-21 21:21:49,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:49,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 21:21:49,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171963905] [2020-08-21 21:21:49,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 21:21:49,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:49,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 21:21:49,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:21:49,483 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 21:21:49,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:49,589 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 21:21:49,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:21:49,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 21:21:49,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:49,591 INFO L225 Difference]: With dead ends: 40 [2020-08-21 21:21:49,592 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 21:21:49,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-21 21:21:49,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 21:21:49,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 21:21:49,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 21:21:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 21:21:49,599 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 21:21:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:49,600 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 21:21:49,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 21:21:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 21:21:49,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 21:21:49,601 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:49,601 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:49,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:21:49,602 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:49,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:49,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 21:21:49,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:49,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426013810] [2020-08-21 21:21:49,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:49,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-21 21:21:49,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426013810] [2020-08-21 21:21:49,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:49,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:21:49,868 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170139774] [2020-08-21 21:21:49,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:21:49,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:49,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:21:49,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:21:49,872 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 21:21:50,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:50,021 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 21:21:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 21:21:50,022 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 21:21:50,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:50,024 INFO L225 Difference]: With dead ends: 43 [2020-08-21 21:21:50,024 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 21:21:50,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-21 21:21:50,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 21:21:50,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 21:21:50,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 21:21:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 21:21:50,039 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 21:21:50,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:50,041 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 21:21:50,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:21:50,042 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 21:21:50,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 21:21:50,045 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:50,045 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:50,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:21:50,045 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:50,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 21:21:50,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:50,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489630092] [2020-08-21 21:21:50,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:50,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-21 21:21:50,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489630092] [2020-08-21 21:21:50,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:50,345 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 21:21:50,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681099241] [2020-08-21 21:21:50,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 21:21:50,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:50,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 21:21:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 21:21:50,351 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 21:21:50,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:50,485 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 21:21:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 21:21:50,485 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 21:21:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:50,486 INFO L225 Difference]: With dead ends: 46 [2020-08-21 21:21:50,487 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 21:21:50,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 21:21:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 21:21:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 21:21:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 21:21:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 21:21:50,494 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 21:21:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:50,494 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 21:21:50,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 21:21:50,495 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 21:21:50,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 21:21:50,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:50,496 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:50,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:21:50,497 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:50,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 21:21:50,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:50,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999900637] [2020-08-21 21:21:50,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:50,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 21:21:50,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:50,772 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-21 21:21:50,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999900637] [2020-08-21 21:21:50,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:50,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 21:21:50,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406380007] [2020-08-21 21:21:50,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 21:21:50,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:50,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 21:21:50,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:21:50,784 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 21:21:50,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:50,918 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 21:21:50,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 21:21:50,919 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 21:21:50,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:50,920 INFO L225 Difference]: With dead ends: 49 [2020-08-21 21:21:50,920 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 21:21:50,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 21:21:50,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 21:21:50,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 21:21:50,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 21:21:50,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 21:21:50,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 21:21:50,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:50,927 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 21:21:50,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 21:21:50,927 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 21:21:50,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 21:21:50,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:50,929 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:50,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:21:50,929 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:50,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:50,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 21:21:50,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:50,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090723277] [2020-08-21 21:21:50,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 21:21:50,943 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 21:21:50,943 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:21:50,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:21:50,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:21:50 BoogieIcfgContainer [2020-08-21 21:21:50,968 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:21:50,971 INFO L168 Benchmark]: Toolchain (without parser) took 4365.75 ms. Allocated memory was 141.6 MB in the beginning and 276.3 MB in the end (delta: 134.7 MB). Free memory was 103.4 MB in the beginning and 222.6 MB in the end (delta: -119.2 MB). Peak memory consumption was 15.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:50,972 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 21:21:50,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.49 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:50,973 INFO L168 Benchmark]: Boogie Preprocessor took 115.31 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 182.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:50,974 INFO L168 Benchmark]: RCFGBuilder took 252.68 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:50,975 INFO L168 Benchmark]: TraceAbstraction took 3715.58 ms. Allocated memory was 202.9 MB in the beginning and 276.3 MB in the end (delta: 73.4 MB). Free memory was 170.0 MB in the beginning and 222.6 MB in the end (delta: -52.6 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:50,978 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 276.49 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 93.5 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.31 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 93.5 MB in the beginning and 182.1 MB in the end (delta: -88.6 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 252.68 ms. Allocated memory is still 202.9 MB. Free memory was 182.1 MB in the beginning and 170.6 MB in the end (delta: 11.5 MB). Peak memory consumption was 11.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3715.58 ms. Allocated memory was 202.9 MB in the beginning and 276.3 MB in the end (delta: 73.4 MB). Free memory was 170.0 MB in the beginning and 222.6 MB in the end (delta: -52.6 MB). Peak memory consumption was 20.8 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] int input = 10; [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] 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: 3.6s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s 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, 2.0s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 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...