/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=1000 --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_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:31:44,446 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:31:44,449 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:31:44,474 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:31:44,475 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:31:44,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:31:44,477 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:31:44,479 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:31:44,481 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:31:44,482 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:31:44,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:31:44,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:31:44,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:31:44,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:31:44,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:31:44,488 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:31:44,489 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:31:44,490 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:31:44,492 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:31:44,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:31:44,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:31:44,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:31:44,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:31:44,498 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:31:44,501 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:31:44,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:31:44,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:31:44,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:31:44,513 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 16:31:44,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:31:44,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:31:44,566 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:31:44,566 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:31:44,566 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:31:44,567 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:31:44,567 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:31:44,567 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:31:44,567 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:31:44,567 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:31:44,568 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:31:44,570 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:31:44,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:31:44,570 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:31:44,571 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:31:44,571 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:31:44,571 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:31:44,571 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:31:44,571 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:31:44,572 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:31:44,573 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:31:44,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:44,573 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:31:44,574 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:31:44,576 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=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:31:44,930 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:31:44,952 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:31:44,956 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:31:44,959 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:31:44,960 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:31:44,961 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-21 16:31:45,049 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd1c81ff4/94f74cfbf0b94e6586dca35b4a94ebe9/FLAGb6b40befd [2020-08-21 16:31:45,550 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:31:45,551 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_o10.c [2020-08-21 16:31:45,558 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd1c81ff4/94f74cfbf0b94e6586dca35b4a94ebe9/FLAGb6b40befd [2020-08-21 16:31:45,927 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cd1c81ff4/94f74cfbf0b94e6586dca35b4a94ebe9 [2020-08-21 16:31:45,938 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:31:45,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:31:45,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:45,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:31:45,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:31:45,947 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:45" (1/1) ... [2020-08-21 16:31:45,950 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c096cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:45, skipping insertion in model container [2020-08-21 16:31:45,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:45" (1/1) ... [2020-08-21 16:31:45,959 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:31:45,976 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:31:46,202 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:46,207 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:31:46,224 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:46,240 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:31:46,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46 WrapperNode [2020-08-21 16:31:46,241 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:46,242 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:31:46,242 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:31:46,242 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:31:46,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,258 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,263 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,263 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,269 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,270 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... [2020-08-21 16:31:46,272 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:31:46,272 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:31:46,272 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:31:46,272 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:31:46,273 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:46,483 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:31:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:31:46,484 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 16:31:46,485 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:31:46,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:31:46,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:31:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 16:31:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:31:46,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:31:46,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:31:46,647 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:31:46,647 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:31:46,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:46 BoogieIcfgContainer [2020-08-21 16:31:46,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:31:46,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:31:46,653 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:31:46,656 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:31:46,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:31:45" (1/3) ... [2020-08-21 16:31:46,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0b416b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:46, skipping insertion in model container [2020-08-21 16:31:46,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:46" (2/3) ... [2020-08-21 16:31:46,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a0b416b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:46, skipping insertion in model container [2020-08-21 16:31:46,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:46" (3/3) ... [2020-08-21 16:31:46,660 INFO L109 eAbstractionObserver]: Analyzing ICFG id_o10.c [2020-08-21 16:31:46,671 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:31:46,680 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:31:46,695 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:31:46,721 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:31:46,721 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:31:46,721 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:31:46,722 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:31:46,722 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:31:46,722 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:31:46,722 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:31:46,722 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:31:46,741 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 16:31:46,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:31:46,747 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:46,748 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:46,748 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:46,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:46,755 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-21 16:31:46,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:46,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005814692] [2020-08-21 16:31:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:47,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,150 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 16:31:47,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005814692] [2020-08-21 16:31:47,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:47,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:31:47,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650989521] [2020-08-21 16:31:47,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:31:47,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:47,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:31:47,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:47,182 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-21 16:31:47,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:47,230 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-08-21 16:31:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:31:47,233 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 16:31:47,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:47,242 INFO L225 Difference]: With dead ends: 32 [2020-08-21 16:31:47,242 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 16:31:47,245 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 16:31:47,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 16:31:47,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 16:31:47,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 16:31:47,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-21 16:31:47,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-21 16:31:47,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:47,287 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-21 16:31:47,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:31:47,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-21 16:31:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:31:47,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:47,290 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 16:31:47,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:31:47,291 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:47,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:47,291 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-21 16:31:47,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:47,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659653650] [2020-08-21 16:31:47,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:47,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:47,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:47,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,472 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 16:31:47,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659653650] [2020-08-21 16:31:47,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:47,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 16:31:47,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981747114] [2020-08-21 16:31:47,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 16:31:47,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:47,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 16:31:47,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 16:31:47,477 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-08-21 16:31:47,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:47,512 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-21 16:31:47,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 16:31:47,513 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 16:31:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:47,515 INFO L225 Difference]: With dead ends: 25 [2020-08-21 16:31:47,515 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 16:31:47,516 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 16:31:47,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 16:31:47,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 16:31:47,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 16:31:47,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-21 16:31:47,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-21 16:31:47,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:47,524 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-21 16:31:47,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 16:31:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-21 16:31:47,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 16:31:47,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:47,526 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 16:31:47,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:31:47,526 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:47,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:47,527 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-21 16:31:47,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:47,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925146697] [2020-08-21 16:31:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:47,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:47,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:47,798 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 16:31:47,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925146697] [2020-08-21 16:31:47,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:47,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 16:31:47,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580088954] [2020-08-21 16:31:47,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 16:31:47,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:47,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 16:31:47,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:31:47,803 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-08-21 16:31:47,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:47,862 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-21 16:31:47,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 16:31:47,864 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-08-21 16:31:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:47,866 INFO L225 Difference]: With dead ends: 28 [2020-08-21 16:31:47,866 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 16:31:47,867 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 16:31:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 16:31:47,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 16:31:47,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 16:31:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-21 16:31:47,875 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-21 16:31:47,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:47,876 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-21 16:31:47,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 16:31:47,876 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-21 16:31:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 16:31:47,878 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:47,878 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 16:31:47,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:31:47,879 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:47,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:47,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-21 16:31:47,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:47,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138164388] [2020-08-21 16:31:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,232 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 16:31:48,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138164388] [2020-08-21 16:31:48,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:48,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:31:48,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270303249] [2020-08-21 16:31:48,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:31:48,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:48,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:31:48,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:31:48,236 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 11 states. [2020-08-21 16:31:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:48,299 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-21 16:31:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:31:48,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-08-21 16:31:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:48,301 INFO L225 Difference]: With dead ends: 31 [2020-08-21 16:31:48,301 INFO L226 Difference]: Without dead ends: 27 [2020-08-21 16:31:48,302 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 16:31:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-21 16:31:48,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-21 16:31:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 16:31:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-21 16:31:48,309 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-21 16:31:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:48,310 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-21 16:31:48,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:31:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-21 16:31:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 16:31:48,312 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:48,312 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 16:31:48,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:31:48,312 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:48,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-21 16:31:48,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:48,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738417486] [2020-08-21 16:31:48,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:48,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,609 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 16:31:48,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738417486] [2020-08-21 16:31:48,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:48,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 16:31:48,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837396267] [2020-08-21 16:31:48,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 16:31:48,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:48,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 16:31:48,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:31:48,612 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 13 states. [2020-08-21 16:31:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:48,690 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-21 16:31:48,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 16:31:48,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2020-08-21 16:31:48,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:48,692 INFO L225 Difference]: With dead ends: 34 [2020-08-21 16:31:48,692 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 16:31:48,693 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 16:31:48,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 16:31:48,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 16:31:48,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 16:31:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-21 16:31:48,700 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-21 16:31:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:48,701 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-21 16:31:48,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 16:31:48,701 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-21 16:31:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 16:31:48,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:48,703 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 16:31:48,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:31:48,703 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:48,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:48,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-21 16:31:48,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:48,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649870449] [2020-08-21 16:31:48,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:48,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:48,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,044 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 16:31:49,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649870449] [2020-08-21 16:31:49,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:49,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 16:31:49,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757409241] [2020-08-21 16:31:49,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 16:31:49,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:49,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 16:31:49,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 16:31:49,047 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 15 states. [2020-08-21 16:31:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:49,155 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-21 16:31:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:31:49,156 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 16:31:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:49,157 INFO L225 Difference]: With dead ends: 37 [2020-08-21 16:31:49,158 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 16:31:49,158 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 16:31:49,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 16:31:49,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-21 16:31:49,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 16:31:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-21 16:31:49,165 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-21 16:31:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:49,166 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-21 16:31:49,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 16:31:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-21 16:31:49,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 16:31:49,168 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:49,168 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 16:31:49,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:31:49,168 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:49,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:49,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-21 16:31:49,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:49,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260203719] [2020-08-21 16:31:49,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,521 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 16:31:49,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260203719] [2020-08-21 16:31:49,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:49,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 16:31:49,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029225914] [2020-08-21 16:31:49,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 16:31:49,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:49,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 16:31:49,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:31:49,524 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 17 states. [2020-08-21 16:31:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:49,637 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-21 16:31:49,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 16:31:49,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-08-21 16:31:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:49,639 INFO L225 Difference]: With dead ends: 40 [2020-08-21 16:31:49,639 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 16:31:49,640 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 16:31:49,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 16:31:49,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-21 16:31:49,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 16:31:49,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-21 16:31:49,646 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-21 16:31:49,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:49,646 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-21 16:31:49,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 16:31:49,646 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-21 16:31:49,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 16:31:49,648 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:49,648 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 16:31:49,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:31:49,648 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-21 16:31:49,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:49,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677703945] [2020-08-21 16:31:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:49,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:49,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:49,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:49,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:49,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,117 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 16:31:50,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677703945] [2020-08-21 16:31:50,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:50,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 16:31:50,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192147292] [2020-08-21 16:31:50,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 16:31:50,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:50,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 16:31:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-08-21 16:31:50,124 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 19 states. [2020-08-21 16:31:50,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:50,270 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-21 16:31:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 16:31:50,270 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 55 [2020-08-21 16:31:50,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:50,272 INFO L225 Difference]: With dead ends: 43 [2020-08-21 16:31:50,272 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 16:31:50,273 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 16:31:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 16:31:50,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-21 16:31:50,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 16:31:50,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-21 16:31:50,279 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-21 16:31:50,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:50,280 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-21 16:31:50,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 16:31:50,280 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-21 16:31:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 16:31:50,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:50,282 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 16:31:50,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:31:50,282 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:50,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:50,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-21 16:31:50,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:50,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546159087] [2020-08-21 16:31:50,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:50,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:50,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:50,832 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 16:31:50,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546159087] [2020-08-21 16:31:50,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:50,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 16:31:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346787066] [2020-08-21 16:31:50,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 16:31:50,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:50,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 16:31:50,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-08-21 16:31:50,842 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 21 states. [2020-08-21 16:31:51,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:51,029 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-21 16:31:51,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 16:31:51,030 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 61 [2020-08-21 16:31:51,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:51,034 INFO L225 Difference]: With dead ends: 46 [2020-08-21 16:31:51,035 INFO L226 Difference]: Without dead ends: 42 [2020-08-21 16:31:51,036 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 16:31:51,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-21 16:31:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-21 16:31:51,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 16:31:51,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-21 16:31:51,045 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-21 16:31:51,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:51,045 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-21 16:31:51,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 16:31:51,045 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-21 16:31:51,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 16:31:51,047 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:51,047 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 16:31:51,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:31:51,048 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:51,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:51,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-21 16:31:51,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:51,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657235660] [2020-08-21 16:31:51,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:51,696 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 16:31:51,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657235660] [2020-08-21 16:31:51,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:51,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 16:31:51,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819917942] [2020-08-21 16:31:51,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 16:31:51,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:51,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 16:31:51,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-08-21 16:31:51,699 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 23 states. [2020-08-21 16:31:51,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:51,917 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-21 16:31:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 16:31:51,918 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 67 [2020-08-21 16:31:51,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:51,919 INFO L225 Difference]: With dead ends: 49 [2020-08-21 16:31:51,919 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 16:31:51,924 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 16:31:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 16:31:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-21 16:31:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-21 16:31:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-21 16:31:51,935 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-21 16:31:51,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:51,939 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-21 16:31:51,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 16:31:51,939 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-21 16:31:51,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 16:31:51,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:51,940 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 16:31:51,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:31:51,944 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:51,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:51,944 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-21 16:31:51,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:51,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761582704] [2020-08-21 16:31:51,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 16:31:52,010 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 16:31:52,010 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 16:31:52,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:31:52,041 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:31:52 BoogieIcfgContainer [2020-08-21 16:31:52,041 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:31:52,044 INFO L168 Benchmark]: Toolchain (without parser) took 6103.44 ms. Allocated memory was 137.9 MB in the beginning and 284.2 MB in the end (delta: 146.3 MB). Free memory was 101.7 MB in the beginning and 174.5 MB in the end (delta: -72.8 MB). Peak memory consumption was 73.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:52,045 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 16:31:52,045 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.63 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:52,046 INFO L168 Benchmark]: Boogie Preprocessor took 29.59 ms. Allocated memory is still 137.9 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:52,047 INFO L168 Benchmark]: RCFGBuilder took 379.67 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 90.8 MB in the beginning and 173.0 MB in the end (delta: -82.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:52,048 INFO L168 Benchmark]: TraceAbstraction took 5388.33 ms. Allocated memory was 204.5 MB in the beginning and 284.2 MB in the end (delta: 79.7 MB). Free memory was 172.3 MB in the beginning and 174.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 77.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:52,051 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 137.9 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.63 ms. Allocated memory is still 137.9 MB. Free memory was 101.5 MB in the beginning and 92.2 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.59 ms. Allocated memory is still 137.9 MB. Free memory was 92.2 MB in the beginning and 90.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 379.67 ms. Allocated memory was 137.9 MB in the beginning and 204.5 MB in the end (delta: 66.6 MB). Free memory was 90.8 MB in the beginning and 173.0 MB in the end (delta: -82.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5388.33 ms. Allocated memory was 204.5 MB in the beginning and 284.2 MB in the end (delta: 79.7 MB). Free memory was 172.3 MB in the beginning and 174.5 MB in the end (delta: -2.3 MB). Peak memory consumption was 77.4 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, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s 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...