/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=SMALLEST --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 15:43:20,076 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 15:43:20,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 15:43:20,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 15:43:20,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 15:43:20,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 15:43:20,131 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 15:43:20,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 15:43:20,133 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 15:43:20,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 15:43:20,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 15:43:20,135 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 15:43:20,136 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 15:43:20,138 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 15:43:20,138 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 15:43:20,139 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 15:43:20,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 15:43:20,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 15:43:20,145 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 15:43:20,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 15:43:20,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 15:43:20,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 15:43:20,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 15:43:20,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 15:43:20,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 15:43:20,165 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 15:43:20,165 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 15:43:20,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 15:43:20,188 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 15:43:20,189 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 15:43:20,189 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 15:43:20,190 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 15:43:20,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 15:43:20,190 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 15:43:20,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 15:43:20,190 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 15:43:20,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 15:43:20,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 15:43:20,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 15:43:20,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 15:43:20,191 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 15:43:20,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 15:43:20,192 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 15:43:20,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 15:43:20,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 15:43:20,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 15:43:20,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 15:43:20,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 15:43:20,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 15:43:20,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 15:43:20,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 15:43:20,194 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 15:43:20,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 15:43:20,194 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 15:43:20,194 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 15:43:20,194 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 15:43:20,195 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=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 15:43:20,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 15:43:20,509 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 15:43:20,513 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 15:43:20,514 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 15:43:20,516 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 15:43:20,517 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-21 15:43:20,590 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dabab8f63/46cf48845af54f09a79e44baee9c46b2/FLAG00fe0fccd [2020-08-21 15:43:21,053 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 15:43:21,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-21 15:43:21,060 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dabab8f63/46cf48845af54f09a79e44baee9c46b2/FLAG00fe0fccd [2020-08-21 15:43:21,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dabab8f63/46cf48845af54f09a79e44baee9c46b2 [2020-08-21 15:43:21,490 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 15:43:21,492 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 15:43:21,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:21,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 15:43:21,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 15:43:21,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f32ca57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21, skipping insertion in model container [2020-08-21 15:43:21,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 15:43:21,540 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 15:43:21,704 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:21,708 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 15:43:21,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 15:43:21,740 INFO L208 MainTranslator]: Completed translation [2020-08-21 15:43:21,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21 WrapperNode [2020-08-21 15:43:21,741 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 15:43:21,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 15:43:21,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 15:43:21,742 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 15:43:21,757 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,763 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,764 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,767 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (1/1) ... [2020-08-21 15:43:21,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 15:43:21,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 15:43:21,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 15:43:21,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 15:43:21,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (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 15:43:21,930 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 15:43:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 15:43:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 15:43:21,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 15:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 15:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 15:43:21,931 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 15:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 15:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 15:43:21,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 15:43:22,101 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 15:43:22,102 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 15:43:22,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:22 BoogieIcfgContainer [2020-08-21 15:43:22,105 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 15:43:22,112 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 15:43:22,112 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 15:43:22,115 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 15:43:22,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 03:43:21" (1/3) ... [2020-08-21 15:43:22,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c675bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:22, skipping insertion in model container [2020-08-21 15:43:22,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 03:43:21" (2/3) ... [2020-08-21 15:43:22,117 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13c675bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 03:43:22, skipping insertion in model container [2020-08-21 15:43:22,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 03:43:22" (3/3) ... [2020-08-21 15:43:22,119 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-21 15:43:22,129 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 15:43:22,137 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 15:43:22,151 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 15:43:22,181 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 15:43:22,182 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 15:43:22,182 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 15:43:22,182 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 15:43:22,182 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 15:43:22,182 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 15:43:22,182 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 15:43:22,183 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 15:43:22,202 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 15:43:22,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 15:43:22,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:22,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 15:43:22,210 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:22,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:22,217 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 15:43:22,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:22,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425342091] [2020-08-21 15:43:22,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:22,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,425 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 15:43:22,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425342091] [2020-08-21 15:43:22,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 15:43:22,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 15:43:22,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523202081] [2020-08-21 15:43:22,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 15:43:22,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:22,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 15:43:22,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 15:43:22,467 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 15:43:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:22,543 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-21 15:43:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 15:43:22,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 15:43:22,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:22,555 INFO L225 Difference]: With dead ends: 30 [2020-08-21 15:43:22,556 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 15:43:22,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:43:22,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 15:43:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 15:43:22,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 15:43:22,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 15:43:22,607 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 15:43:22,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:22,608 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 15:43:22,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 15:43:22,609 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 15:43:22,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 15:43:22,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:22,611 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 15:43:22,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 15:43:22,612 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:22,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:22,613 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 15:43:22,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:22,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795624908] [2020-08-21 15:43:22,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:22,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:22,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:22,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,742 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 15:43:22,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795624908] [2020-08-21 15:43:22,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:22,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 15:43:22,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602734731] [2020-08-21 15:43:22,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 15:43:22,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:22,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 15:43:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 15:43:22,747 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-21 15:43:22,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:22,815 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 15:43:22,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 15:43:22,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-21 15:43:22,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:22,817 INFO L225 Difference]: With dead ends: 25 [2020-08-21 15:43:22,817 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 15:43:22,819 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 15:43:22,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 15:43:22,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 15:43:22,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 15:43:22,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 15:43:22,827 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 15:43:22,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:22,828 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 15:43:22,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 15:43:22,828 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 15:43:22,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 15:43:22,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:22,829 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 15:43:22,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 15:43:22,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:22,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 15:43:22,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:22,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028000870] [2020-08-21 15:43:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:22,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:22,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:22,983 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 15:43:22,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028000870] [2020-08-21 15:43:22,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:22,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 15:43:22,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47078920] [2020-08-21 15:43:22,986 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 15:43:22,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:22,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 15:43:22,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 15:43:22,987 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-21 15:43:23,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:23,056 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 15:43:23,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 15:43:23,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-21 15:43:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:23,058 INFO L225 Difference]: With dead ends: 28 [2020-08-21 15:43:23,059 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 15:43:23,060 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 15:43:23,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 15:43:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 15:43:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 15:43:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 15:43:23,067 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 15:43:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:23,067 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 15:43:23,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 15:43:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 15:43:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 15:43:23,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:23,069 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 15:43:23,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 15:43:23,070 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:23,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 15:43:23,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:23,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1448364001] [2020-08-21 15:43:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:23,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,312 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 15:43:23,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1448364001] [2020-08-21 15:43:23,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:23,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 15:43:23,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096559485] [2020-08-21 15:43:23,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 15:43:23,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:23,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 15:43:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 15:43:23,316 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-21 15:43:23,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:23,418 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 15:43:23,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 15:43:23,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-21 15:43:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:23,420 INFO L225 Difference]: With dead ends: 31 [2020-08-21 15:43:23,421 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 15:43:23,422 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 15:43:23,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 15:43:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 15:43:23,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 15:43:23,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 15:43:23,429 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 15:43:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:23,430 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 15:43:23,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 15:43:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 15:43:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 15:43:23,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:23,432 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 15:43:23,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 15:43:23,432 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:23,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 15:43:23,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:23,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410754480] [2020-08-21 15:43:23,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,658 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 15:43:23,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410754480] [2020-08-21 15:43:23,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:23,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 15:43:23,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51385751] [2020-08-21 15:43:23,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 15:43:23,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 15:43:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 15:43:23,661 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-21 15:43:23,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:23,738 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 15:43:23,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 15:43:23,739 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-21 15:43:23,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:23,740 INFO L225 Difference]: With dead ends: 34 [2020-08-21 15:43:23,740 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 15:43:23,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:43:23,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 15:43:23,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 15:43:23,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 15:43:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 15:43:23,749 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 15:43:23,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:23,749 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 15:43:23,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 15:43:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 15:43:23,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 15:43:23,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:23,751 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 15:43:23,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 15:43:23,751 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 15:43:23,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:23,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932047463] [2020-08-21 15:43:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:23,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:23,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:23,921 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 15:43:23,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932047463] [2020-08-21 15:43:23,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:23,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 15:43:23,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095928956] [2020-08-21 15:43:23,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 15:43:23,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:23,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 15:43:23,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 15:43:23,924 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-21 15:43:24,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:24,016 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 15:43:24,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 15:43:24,016 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 15:43:24,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:24,018 INFO L225 Difference]: With dead ends: 37 [2020-08-21 15:43:24,018 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 15:43:24,019 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 15:43:24,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 15:43:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 15:43:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 15:43:24,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 15:43:24,025 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 15:43:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:24,026 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 15:43:24,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 15:43:24,026 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 15:43:24,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 15:43:24,027 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:24,028 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 15:43:24,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 15:43:24,028 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:24,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:24,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 15:43:24,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:24,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981055885] [2020-08-21 15:43:24,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:24,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,242 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 15:43:24,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981055885] [2020-08-21 15:43:24,243 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:24,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 15:43:24,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144643769] [2020-08-21 15:43:24,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 15:43:24,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 15:43:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 15:43:24,246 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-21 15:43:24,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:24,364 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 15:43:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 15:43:24,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-21 15:43:24,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:24,366 INFO L225 Difference]: With dead ends: 40 [2020-08-21 15:43:24,366 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 15:43:24,367 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 15:43:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 15:43:24,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 15:43:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 15:43:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 15:43:24,375 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 15:43:24,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:24,375 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 15:43:24,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 15:43:24,375 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 15:43:24,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 15:43:24,377 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:24,377 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 15:43:24,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 15:43:24,378 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:24,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:24,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 15:43:24,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:24,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872421796] [2020-08-21 15:43:24,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:24,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,600 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 15:43:24,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872421796] [2020-08-21 15:43:24,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:24,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 15:43:24,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212413135] [2020-08-21 15:43:24,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 15:43:24,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:24,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 15:43:24,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 15:43:24,603 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-21 15:43:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:24,718 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 15:43:24,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 15:43:24,719 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-21 15:43:24,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:24,720 INFO L225 Difference]: With dead ends: 43 [2020-08-21 15:43:24,721 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 15:43:24,721 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 15:43:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 15:43:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 15:43:24,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 15:43:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 15:43:24,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 15:43:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:24,729 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 15:43:24,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 15:43:24,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 15:43:24,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 15:43:24,731 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:24,731 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 15:43:24,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 15:43:24,732 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:24,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:24,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 15:43:24,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:24,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56941161] [2020-08-21 15:43:24,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:24,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:24,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,003 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 15:43:25,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56941161] [2020-08-21 15:43:25,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:25,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 15:43:25,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658253158] [2020-08-21 15:43:25,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 15:43:25,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:25,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 15:43:25,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 15:43:25,006 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-21 15:43:25,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:25,154 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 15:43:25,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 15:43:25,154 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-21 15:43:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:25,156 INFO L225 Difference]: With dead ends: 46 [2020-08-21 15:43:25,156 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 15:43:25,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-21 15:43:25,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 15:43:25,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 15:43:25,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 15:43:25,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 15:43:25,165 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 15:43:25,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:25,166 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 15:43:25,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 15:43:25,167 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 15:43:25,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 15:43:25,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:25,168 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 15:43:25,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 15:43:25,169 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:25,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:25,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 15:43:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:25,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485858939] [2020-08-21 15:43:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:25,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 15:43:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 15:43:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 15:43:25,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 15:43:25,487 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 15:43:25,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485858939] [2020-08-21 15:43:25,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 15:43:25,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 15:43:25,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613287803] [2020-08-21 15:43:25,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 15:43:25,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 15:43:25,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 15:43:25,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 15:43:25,492 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-21 15:43:25,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 15:43:25,663 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 15:43:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 15:43:25,664 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-21 15:43:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 15:43:25,666 INFO L225 Difference]: With dead ends: 49 [2020-08-21 15:43:25,666 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 15:43:25,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-21 15:43:25,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 15:43:25,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 15:43:25,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 15:43:25,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 15:43:25,679 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 15:43:25,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 15:43:25,679 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 15:43:25,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 15:43:25,679 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 15:43:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 15:43:25,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 15:43:25,681 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 15:43:25,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 15:43:25,681 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 15:43:25,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 15:43:25,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 15:43:25,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 15:43:25,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [545144455] [2020-08-21 15:43:25,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 15:43:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 15:43:25,698 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 15:43:25,698 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 15:43:25,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 15:43:25,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 03:43:25 BoogieIcfgContainer [2020-08-21 15:43:25,726 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 15:43:25,729 INFO L168 Benchmark]: Toolchain (without parser) took 4236.29 ms. Allocated memory was 140.5 MB in the beginning and 277.3 MB in the end (delta: 136.8 MB). Free memory was 103.2 MB in the beginning and 220.5 MB in the end (delta: -117.3 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-21 15:43:25,730 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 15:43:25,731 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.91 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:43:25,732 INFO L168 Benchmark]: Boogie Preprocessor took 29.26 ms. Allocated memory is still 140.5 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 15:43:25,733 INFO L168 Benchmark]: RCFGBuilder took 333.42 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.3 MB in the beginning and 172.1 MB in the end (delta: -79.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-21 15:43:25,734 INFO L168 Benchmark]: TraceAbstraction took 3615.42 ms. Allocated memory was 203.9 MB in the beginning and 277.3 MB in the end (delta: 73.4 MB). Free memory was 172.1 MB in the beginning and 220.5 MB in the end (delta: -48.4 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-08-21 15:43:25,737 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.91 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.7 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.26 ms. Allocated memory is still 140.5 MB. Free memory was 93.7 MB in the beginning and 92.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 333.42 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.3 MB in the beginning and 172.1 MB in the end (delta: -79.7 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3615.42 ms. Allocated memory was 203.9 MB in the beginning and 277.3 MB in the end (delta: 73.4 MB). Free memory was 172.1 MB in the beginning and 220.5 MB in the end (delta: -48.4 MB). Peak memory consumption was 25.0 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: 3.5s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s 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...