/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=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:10:20,792 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 22:10:20,819 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:10:20,820 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:10:20,822 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:10:20,824 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:10:20,826 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:10:20,827 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:10:20,828 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:10:20,829 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:10:20,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:10:20,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:10:20,831 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:10:20,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:10:20,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:10:20,834 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:10:20,836 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:10:20,838 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:10:20,839 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:10:20,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:10:20,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:10:20,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:10:20,844 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:10:20,852 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:10:20,853 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:10:20,854 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:10:20,854 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 22:10:20,881 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:10:20,881 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:10:20,883 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:10:20,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:10:20,883 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:10:20,883 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:10:20,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:10:20,887 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:10:20,887 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:10:20,887 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:10:20,888 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:10:20,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:10:20,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:10:20,888 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:10:20,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:10:20,889 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:10:20,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:10:20,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:10:20,889 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:10:20,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:10:20,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:10:20,890 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:10:20,890 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:10:20,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:10:20,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:10:20,891 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:10:20,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:10:20,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:10:20,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:10:20,894 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=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:10:21,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:10:21,194 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:10:21,198 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:10:21,199 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:10:21,200 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:10:21,201 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-21 22:10:21,280 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1910bc72a/5ef786b82fcb493d9e895642d78b82ac/FLAGefba9c4ba [2020-08-21 22:10:21,769 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:10:21,769 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-21 22:10:21,776 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1910bc72a/5ef786b82fcb493d9e895642d78b82ac/FLAGefba9c4ba [2020-08-21 22:10:22,132 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1910bc72a/5ef786b82fcb493d9e895642d78b82ac [2020-08-21 22:10:22,141 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:10:22,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:10:22,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:22,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:10:22,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:10:22,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,155 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a7d2fbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22, skipping insertion in model container [2020-08-21 22:10:22,155 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,164 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:10:22,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:10:22,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:22,355 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:10:22,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:10:22,383 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:10:22,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22 WrapperNode [2020-08-21 22:10:22,384 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:10:22,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:10:22,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:10:22,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:10:22,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,401 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,405 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (1/1) ... [2020-08-21 22:10:22,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:10:22,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:10:22,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:10:22,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:10:22,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (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 22:10:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:10:22,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:10:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 22:10:22,553 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:10:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 22:10:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:10:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 22:10:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:10:22,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:10:22,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:10:22,718 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:10:22,718 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:10:22,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:22 BoogieIcfgContainer [2020-08-21 22:10:22,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:10:22,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:10:22,724 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:10:22,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:10:22,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:10:22" (1/3) ... [2020-08-21 22:10:22,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b73a946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:22, skipping insertion in model container [2020-08-21 22:10:22,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:10:22" (2/3) ... [2020-08-21 22:10:22,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b73a946 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:10:22, skipping insertion in model container [2020-08-21 22:10:22,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:10:22" (3/3) ... [2020-08-21 22:10:22,732 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-21 22:10:22,743 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:10:22,749 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:10:22,765 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:10:22,790 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:10:22,790 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:10:22,790 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:10:22,790 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:10:22,790 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:10:22,791 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:10:22,791 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:10:22,791 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:10:22,808 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 22:10:22,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:10:22,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:22,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:10:22,815 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:22,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:22,820 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 22:10:22,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:22,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894487376] [2020-08-21 22:10:22,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:22,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:23,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,140 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 22:10:23,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894487376] [2020-08-21 22:10:23,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:10:23,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:10:23,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863373286] [2020-08-21 22:10:23,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:10:23,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:23,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:10:23,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:23,171 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 22:10:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:23,241 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 22:10:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:10:23,244 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:10:23,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:23,255 INFO L225 Difference]: With dead ends: 32 [2020-08-21 22:10:23,255 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 22:10:23,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:10:23,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 22:10:23,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 22:10:23,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 22:10:23,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 22:10:23,305 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 22:10:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:23,306 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 22:10:23,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:10:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 22:10:23,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:10:23,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:23,308 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 22:10:23,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:10:23,309 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:23,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:23,310 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 22:10:23,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:23,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215210796] [2020-08-21 22:10:23,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:23,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,513 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 22:10:23,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215210796] [2020-08-21 22:10:23,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:23,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:10:23,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650187817] [2020-08-21 22:10:23,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:10:23,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:23,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:10:23,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:10:23,518 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-21 22:10:23,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:23,549 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 22:10:23,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:10:23,550 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 22:10:23,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:23,551 INFO L225 Difference]: With dead ends: 25 [2020-08-21 22:10:23,552 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 22:10:23,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:10:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 22:10:23,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 22:10:23,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 22:10:23,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 22:10:23,560 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 22:10:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:23,561 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 22:10:23,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:10:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 22:10:23,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:10:23,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:23,563 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 22:10:23,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:10:23,564 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:23,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:23,564 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 22:10:23,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:23,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697105744] [2020-08-21 22:10:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:23,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,835 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 22:10:23,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697105744] [2020-08-21 22:10:23,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:23,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:10:23,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420421032] [2020-08-21 22:10:23,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:10:23,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:10:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:10:23,839 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-21 22:10:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:23,884 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 22:10:23,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:10:23,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-21 22:10:23,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:23,886 INFO L225 Difference]: With dead ends: 28 [2020-08-21 22:10:23,886 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 22:10:23,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:10:23,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 22:10:23,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 22:10:23,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:10:23,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 22:10:23,895 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 22:10:23,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:23,896 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 22:10:23,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:10:23,896 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 22:10:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:10:23,898 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:23,898 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 22:10:23,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:10:23,899 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:23,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:23,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 22:10:23,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:23,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806424447] [2020-08-21 22:10:23,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:23,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:23,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:23,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,191 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 22:10:24,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806424447] [2020-08-21 22:10:24,192 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:24,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:10:24,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636110189] [2020-08-21 22:10:24,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:10:24,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:24,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:10:24,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:10:24,194 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-21 22:10:24,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:24,255 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 22:10:24,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:10:24,256 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-21 22:10:24,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:24,258 INFO L225 Difference]: With dead ends: 31 [2020-08-21 22:10:24,258 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 22:10:24,259 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:10:24,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 22:10:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 22:10:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:10:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 22:10:24,266 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 22:10:24,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:24,267 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 22:10:24,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:10:24,267 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 22:10:24,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 22:10:24,269 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:24,269 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 22:10:24,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:10:24,270 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:24,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:24,270 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 22:10:24,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:24,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086321025] [2020-08-21 22:10:24,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:24,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,563 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 22:10:24,564 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086321025] [2020-08-21 22:10:24,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:24,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:10:24,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449707725] [2020-08-21 22:10:24,565 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:10:24,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:24,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:10:24,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:10:24,567 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-21 22:10:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:24,643 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 22:10:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:10:24,644 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-21 22:10:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:24,645 INFO L225 Difference]: With dead ends: 34 [2020-08-21 22:10:24,645 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 22:10:24,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:10:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 22:10:24,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 22:10:24,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:10:24,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 22:10:24,653 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 22:10:24,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:24,654 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 22:10:24,654 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:10:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 22:10:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:10:24,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:24,656 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 22:10:24,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:10:24,656 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:24,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:24,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 22:10:24,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:24,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405124725] [2020-08-21 22:10:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:24,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:24,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:24,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,081 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 22:10:25,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405124725] [2020-08-21 22:10:25,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:25,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:10:25,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850517066] [2020-08-21 22:10:25,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:10:25,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:25,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:10:25,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:10:25,085 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-21 22:10:25,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:25,217 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 22:10:25,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:10:25,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 22:10:25,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:25,219 INFO L225 Difference]: With dead ends: 37 [2020-08-21 22:10:25,219 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 22:10:25,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:10:25,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 22:10:25,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 22:10:25,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:10:25,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 22:10:25,226 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 22:10:25,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:25,227 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 22:10:25,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:10:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 22:10:25,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 22:10:25,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:25,229 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 22:10:25,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:10:25,229 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:25,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 22:10:25,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:25,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946296792] [2020-08-21 22:10:25,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:25,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,598 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 22:10:25,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946296792] [2020-08-21 22:10:25,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:25,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 22:10:25,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734815814] [2020-08-21 22:10:25,600 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 22:10:25,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:25,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 22:10:25,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:10:25,601 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-21 22:10:25,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:25,724 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 22:10:25,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 22:10:25,724 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-21 22:10:25,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:25,726 INFO L225 Difference]: With dead ends: 40 [2020-08-21 22:10:25,726 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 22:10:25,727 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 22:10:25,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 22:10:25,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 22:10:25,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 22:10:25,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 22:10:25,733 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 22:10:25,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:25,733 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 22:10:25,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 22:10:25,734 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 22:10:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:10:25,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:25,735 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 22:10:25,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:10:25,736 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:25,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:25,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 22:10:25,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:25,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [885967458] [2020-08-21 22:10:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:25,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:25,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:25,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:25,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:25,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,293 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 22:10:26,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [885967458] [2020-08-21 22:10:26,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:26,294 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 22:10:26,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858444279] [2020-08-21 22:10:26,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 22:10:26,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:26,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 22:10:26,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:10:26,296 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-21 22:10:26,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:26,468 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 22:10:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 22:10:26,469 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-21 22:10:26,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:26,470 INFO L225 Difference]: With dead ends: 43 [2020-08-21 22:10:26,470 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:10:26,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:10:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:10:26,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 22:10:26,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 22:10:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 22:10:26,478 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 22:10:26,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:26,479 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 22:10:26,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 22:10:26,479 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 22:10:26,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 22:10:26,480 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:26,480 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 22:10:26,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:10:26,481 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:26,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:26,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 22:10:26,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:26,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181420496] [2020-08-21 22:10:26,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:26,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:26,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:26,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,027 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 22:10:27,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181420496] [2020-08-21 22:10:27,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:27,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 22:10:27,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385746361] [2020-08-21 22:10:27,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 22:10:27,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:27,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 22:10:27,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:10:27,031 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-21 22:10:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:27,210 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 22:10:27,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 22:10:27,211 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-21 22:10:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:27,212 INFO L225 Difference]: With dead ends: 46 [2020-08-21 22:10:27,213 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 22:10:27,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 22:10:27,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 22:10:27,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 22:10:27,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 22:10:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 22:10:27,221 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 22:10:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:27,222 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 22:10:27,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 22:10:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 22:10:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 22:10:27,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:27,223 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 22:10:27,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:10:27,224 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:27,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:27,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 22:10:27,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:27,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048255991] [2020-08-21 22:10:27,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:27,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:10:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:10:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:10:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:10:27,879 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 22:10:27,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048255991] [2020-08-21 22:10:27,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:10:27,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 22:10:27,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008115744] [2020-08-21 22:10:27,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 22:10:27,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:10:27,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 22:10:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:10:27,883 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-21 22:10:28,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:10:28,115 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 22:10:28,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 22:10:28,116 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-21 22:10:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:10:28,117 INFO L225 Difference]: With dead ends: 49 [2020-08-21 22:10:28,117 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 22:10:28,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 22:10:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 22:10:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 22:10:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 22:10:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 22:10:28,124 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 22:10:28,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:10:28,125 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 22:10:28,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 22:10:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 22:10:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 22:10:28,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:10:28,126 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 22:10:28,127 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:10:28,127 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:10:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:10:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 22:10:28,128 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:10:28,128 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1704479743] [2020-08-21 22:10:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:10:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 22:10:28,166 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 22:10:28,166 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 22:10:28,171 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:10:28,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:10:28 BoogieIcfgContainer [2020-08-21 22:10:28,196 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:10:28,199 INFO L168 Benchmark]: Toolchain (without parser) took 6054.60 ms. Allocated memory was 139.5 MB in the beginning and 285.2 MB in the end (delta: 145.8 MB). Free memory was 103.1 MB in the beginning and 163.9 MB in the end (delta: -60.7 MB). Peak memory consumption was 85.0 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,199 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,200 INFO L168 Benchmark]: CACSL2BoogieTranslator took 238.75 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,201 INFO L168 Benchmark]: Boogie Preprocessor took 25.15 ms. Allocated memory is still 139.5 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,202 INFO L168 Benchmark]: RCFGBuilder took 313.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 171.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,203 INFO L168 Benchmark]: TraceAbstraction took 5471.53 ms. Allocated memory was 202.4 MB in the beginning and 285.2 MB in the end (delta: 82.8 MB). Free memory was 171.1 MB in the beginning and 163.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. [2020-08-21 22:10:28,207 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 238.75 ms. Allocated memory is still 139.5 MB. Free memory was 102.9 MB in the beginning and 93.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.15 ms. Allocated memory is still 139.5 MB. Free memory was 93.2 MB in the beginning and 91.9 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 313.04 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 171.1 MB in the end (delta: -79.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5471.53 ms. Allocated memory was 202.4 MB in the beginning and 285.2 MB in the end (delta: 82.8 MB). Free memory was 171.1 MB in the beginning and 163.9 MB in the end (delta: 7.2 MB). Peak memory consumption was 90.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] unsigned int input = __VERIFIER_nondet_uint(); [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] unsigned int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.3s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 244 SDtfs, 2 SDslu, 2772 SDs, 0 SdLazy, 1181 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.6s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 69600 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...