/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 05:59:42,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 05:59:42,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 05:59:42,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 05:59:42,352 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 05:59:42,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 05:59:42,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 05:59:42,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 05:59:42,368 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 05:59:42,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 05:59:42,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 05:59:42,372 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 05:59:42,372 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 05:59:42,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 05:59:42,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 05:59:42,381 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 05:59:42,382 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 05:59:42,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 05:59:42,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 05:59:42,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 05:59:42,395 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 05:59:42,396 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 05:59:42,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 05:59:42,398 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 05:59:42,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 05:59:42,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 05:59:42,423 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 05:59:42,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 05:59:42,426 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 [2020-08-19 05:59:42,467 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 05:59:42,467 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 05:59:42,469 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 05:59:42,469 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 05:59:42,469 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 05:59:42,469 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 05:59:42,470 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 05:59:42,471 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 05:59:42,471 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 05:59:42,471 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 05:59:42,471 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 05:59:42,471 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 05:59:42,472 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 05:59:42,472 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 05:59:42,472 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 05:59:42,472 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 05:59:42,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 05:59:42,473 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 05:59:42,473 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 05:59:42,473 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 05:59:42,473 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 05:59:42,473 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 05:59:42,474 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 05:59:42,474 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 05:59:42,474 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.4; [2020-08-19 05:59:42,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 05:59:42,838 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 05:59:42,841 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 05:59:42,843 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 05:59:42,843 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 05:59:42,844 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-19 05:59:42,904 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8668e438/8de7388fe774453f91d34fa57de9a2a1/FLAGb38500fbe [2020-08-19 05:59:43,352 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 05:59:43,353 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i10_o10-1.c [2020-08-19 05:59:43,359 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8668e438/8de7388fe774453f91d34fa57de9a2a1/FLAGb38500fbe [2020-08-19 05:59:43,735 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a8668e438/8de7388fe774453f91d34fa57de9a2a1 [2020-08-19 05:59:43,743 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 05:59:43,744 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 05:59:43,745 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:43,745 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 05:59:43,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 05:59:43,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:43,753 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cbd24f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43, skipping insertion in model container [2020-08-19 05:59:43,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:43,760 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 05:59:43,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 05:59:43,959 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:43,965 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 05:59:43,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 05:59:43,992 INFO L208 MainTranslator]: Completed translation [2020-08-19 05:59:43,993 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43 WrapperNode [2020-08-19 05:59:43,993 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 05:59:43,993 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 05:59:43,994 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 05:59:43,994 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 05:59:44,003 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,004 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,008 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,013 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (1/1) ... [2020-08-19 05:59:44,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 05:59:44,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 05:59:44,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 05:59:44,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 05:59:44,016 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (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 [2020-08-19 05:59:44,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 05:59:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 05:59:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 05:59:44,146 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 05:59:44,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 05:59:44,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 05:59:44,146 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 05:59:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 05:59:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 05:59:44,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 05:59:44,306 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 05:59:44,307 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 05:59:44,310 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:59:44 BoogieIcfgContainer [2020-08-19 05:59:44,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 05:59:44,312 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 05:59:44,312 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 05:59:44,315 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 05:59:44,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 05:59:43" (1/3) ... [2020-08-19 05:59:44,316 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34101702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:59:44, skipping insertion in model container [2020-08-19 05:59:44,316 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 05:59:43" (2/3) ... [2020-08-19 05:59:44,317 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34101702 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 05:59:44, skipping insertion in model container [2020-08-19 05:59:44,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 05:59:44" (3/3) ... [2020-08-19 05:59:44,319 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-1.c [2020-08-19 05:59:44,328 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 05:59:44,334 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 05:59:44,347 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 05:59:44,370 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 05:59:44,371 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 05:59:44,371 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 05:59:44,371 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 05:59:44,371 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 05:59:44,371 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 05:59:44,372 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 05:59:44,372 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 05:59:44,389 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-19 05:59:44,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 05:59:44,394 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:44,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:44,396 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:44,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:44,400 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-08-19 05:59:44,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:44,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555264982] [2020-08-19 05:59:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:44,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 05:59:44,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555264982] [2020-08-19 05:59:44,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 05:59:44,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 05:59:44,708 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671185677] [2020-08-19 05:59:44,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 05:59:44,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:44,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 05:59:44,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 05:59:44,730 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-08-19 05:59:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:44,813 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-08-19 05:59:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 05:59:44,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 05:59:44,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:44,825 INFO L225 Difference]: With dead ends: 30 [2020-08-19 05:59:44,826 INFO L226 Difference]: Without dead ends: 18 [2020-08-19 05:59:44,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:59:44,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-19 05:59:44,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-19 05:59:44,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-19 05:59:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-19 05:59:44,876 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-08-19 05:59:44,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:44,877 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-19 05:59:44,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 05:59:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-19 05:59:44,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-19 05:59:44,879 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:44,879 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:44,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 05:59:44,880 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:44,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-08-19 05:59:44,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:44,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [743156237] [2020-08-19 05:59:44,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:44,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:44,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:44,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 05:59:45,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [743156237] [2020-08-19 05:59:45,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:45,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 05:59:45,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143201383] [2020-08-19 05:59:45,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 05:59:45,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:45,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 05:59:45,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 05:59:45,007 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2020-08-19 05:59:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:45,090 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-08-19 05:59:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 05:59:45,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-08-19 05:59:45,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:45,093 INFO L225 Difference]: With dead ends: 25 [2020-08-19 05:59:45,093 INFO L226 Difference]: Without dead ends: 21 [2020-08-19 05:59:45,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:59:45,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-19 05:59:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-19 05:59:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-19 05:59:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-19 05:59:45,101 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-08-19 05:59:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:45,102 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-19 05:59:45,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 05:59:45,102 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-19 05:59:45,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-19 05:59:45,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:45,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:45,104 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 05:59:45,104 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-08-19 05:59:45,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:45,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [164016474] [2020-08-19 05:59:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-08-19 05:59:45,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [164016474] [2020-08-19 05:59:45,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:45,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 05:59:45,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255804200] [2020-08-19 05:59:45,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 05:59:45,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:45,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 05:59:45,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 05:59:45,326 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 7 states. [2020-08-19 05:59:45,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:45,415 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-19 05:59:45,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 05:59:45,417 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-19 05:59:45,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:45,418 INFO L225 Difference]: With dead ends: 28 [2020-08-19 05:59:45,419 INFO L226 Difference]: Without dead ends: 24 [2020-08-19 05:59:45,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:59:45,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-19 05:59:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-19 05:59:45,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-19 05:59:45,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-19 05:59:45,435 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-08-19 05:59:45,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:45,438 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-19 05:59:45,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 05:59:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-19 05:59:45,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 05:59:45,441 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:45,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:45,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 05:59:45,442 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:45,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:45,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-08-19 05:59:45,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:45,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [148163016] [2020-08-19 05:59:45,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:45,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:45,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-08-19 05:59:45,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [148163016] [2020-08-19 05:59:45,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:45,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 05:59:45,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470613186] [2020-08-19 05:59:45,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 05:59:45,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:45,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 05:59:45,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 05:59:45,738 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 8 states. [2020-08-19 05:59:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:45,825 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-08-19 05:59:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 05:59:45,826 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-08-19 05:59:45,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:45,827 INFO L225 Difference]: With dead ends: 31 [2020-08-19 05:59:45,827 INFO L226 Difference]: Without dead ends: 27 [2020-08-19 05:59:45,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:59:45,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-08-19 05:59:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-08-19 05:59:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-19 05:59:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-08-19 05:59:45,835 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-08-19 05:59:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:45,836 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-08-19 05:59:45,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 05:59:45,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-08-19 05:59:45,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-19 05:59:45,838 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:45,838 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:45,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 05:59:45,838 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:45,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:45,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-08-19 05:59:45,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:45,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [516806004] [2020-08-19 05:59:45,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:45,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:45,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-08-19 05:59:46,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [516806004] [2020-08-19 05:59:46,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:46,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 05:59:46,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486438846] [2020-08-19 05:59:46,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 05:59:46,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:46,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 05:59:46,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 05:59:46,061 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 9 states. [2020-08-19 05:59:46,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:46,151 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-08-19 05:59:46,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 05:59:46,153 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-08-19 05:59:46,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:46,154 INFO L225 Difference]: With dead ends: 34 [2020-08-19 05:59:46,154 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 05:59:46,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:59:46,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 05:59:46,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 05:59:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 05:59:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-08-19 05:59:46,169 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-08-19 05:59:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:46,169 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-08-19 05:59:46,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 05:59:46,172 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-08-19 05:59:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 05:59:46,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:46,176 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:46,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 05:59:46,177 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:46,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:46,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-08-19 05:59:46,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:46,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009009078] [2020-08-19 05:59:46,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:46,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:46,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-08-19 05:59:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009009078] [2020-08-19 05:59:46,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:46,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 05:59:46,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345899356] [2020-08-19 05:59:46,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 05:59:46,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:46,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 05:59:46,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 05:59:46,420 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 10 states. [2020-08-19 05:59:46,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:46,524 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-08-19 05:59:46,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 05:59:46,524 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 05:59:46,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:46,526 INFO L225 Difference]: With dead ends: 37 [2020-08-19 05:59:46,526 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 05:59:46,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-08-19 05:59:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 05:59:46,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-08-19 05:59:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-19 05:59:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-08-19 05:59:46,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-08-19 05:59:46,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:46,541 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-08-19 05:59:46,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 05:59:46,541 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-08-19 05:59:46,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 05:59:46,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:46,547 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:46,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 05:59:46,547 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:46,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-08-19 05:59:46,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:46,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881974624] [2020-08-19 05:59:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:46,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:46,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:46,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:46,822 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-08-19 05:59:46,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881974624] [2020-08-19 05:59:46,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:46,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 05:59:46,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704079314] [2020-08-19 05:59:46,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 05:59:46,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:46,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 05:59:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 05:59:46,826 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-08-19 05:59:46,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:46,939 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-08-19 05:59:46,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 05:59:46,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 49 [2020-08-19 05:59:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:46,943 INFO L225 Difference]: With dead ends: 40 [2020-08-19 05:59:46,943 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 05:59:46,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-08-19 05:59:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 05:59:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-08-19 05:59:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 05:59:46,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-08-19 05:59:46,959 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-08-19 05:59:46,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:46,959 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-08-19 05:59:46,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 05:59:46,959 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-08-19 05:59:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 05:59:46,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:46,964 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:46,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 05:59:46,965 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:46,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-08-19 05:59:46,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:46,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114234884] [2020-08-19 05:59:46,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:47,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-08-19 05:59:47,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114234884] [2020-08-19 05:59:47,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:47,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 05:59:47,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214653156] [2020-08-19 05:59:47,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 05:59:47,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:47,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 05:59:47,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 05:59:47,252 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 12 states. [2020-08-19 05:59:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:47,371 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-08-19 05:59:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 05:59:47,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 55 [2020-08-19 05:59:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:47,373 INFO L225 Difference]: With dead ends: 43 [2020-08-19 05:59:47,373 INFO L226 Difference]: Without dead ends: 39 [2020-08-19 05:59:47,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-08-19 05:59:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-19 05:59:47,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-08-19 05:59:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-19 05:59:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-08-19 05:59:47,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-08-19 05:59:47,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:47,381 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-08-19 05:59:47,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 05:59:47,381 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-08-19 05:59:47,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 05:59:47,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:47,383 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:47,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 05:59:47,383 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:47,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:47,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-08-19 05:59:47,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:47,384 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066159134] [2020-08-19 05:59:47,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:47,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-08-19 05:59:47,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066159134] [2020-08-19 05:59:47,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:47,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 05:59:47,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786604744] [2020-08-19 05:59:47,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 05:59:47,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:47,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 05:59:47,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 05:59:47,664 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 13 states. [2020-08-19 05:59:47,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:47,790 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-08-19 05:59:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 05:59:47,791 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 61 [2020-08-19 05:59:47,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:47,792 INFO L225 Difference]: With dead ends: 46 [2020-08-19 05:59:47,792 INFO L226 Difference]: Without dead ends: 42 [2020-08-19 05:59:47,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-08-19 05:59:47,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-19 05:59:47,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-08-19 05:59:47,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 05:59:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-08-19 05:59:47,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-08-19 05:59:47,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:47,801 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-08-19 05:59:47,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 05:59:47,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-08-19 05:59:47,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 05:59:47,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:47,802 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:47,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 05:59:47,803 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:47,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-08-19 05:59:47,803 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:47,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850947539] [2020-08-19 05:59:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:47,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 05:59:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 05:59:47,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:47,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:48,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 05:59:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 05:59:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-08-19 05:59:48,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850947539] [2020-08-19 05:59:48,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 05:59:48,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 05:59:48,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685989624] [2020-08-19 05:59:48,177 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 05:59:48,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 05:59:48,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 05:59:48,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 05:59:48,178 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 14 states. [2020-08-19 05:59:48,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 05:59:48,338 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-19 05:59:48,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 05:59:48,339 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-08-19 05:59:48,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 05:59:48,340 INFO L225 Difference]: With dead ends: 49 [2020-08-19 05:59:48,340 INFO L226 Difference]: Without dead ends: 45 [2020-08-19 05:59:48,341 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-08-19 05:59:48,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-19 05:59:48,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-08-19 05:59:48,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-19 05:59:48,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-08-19 05:59:48,356 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-08-19 05:59:48,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 05:59:48,357 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-08-19 05:59:48,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 05:59:48,357 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-08-19 05:59:48,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 05:59:48,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 05:59:48,358 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 05:59:48,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 05:59:48,359 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 05:59:48,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 05:59:48,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-08-19 05:59:48,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 05:59:48,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008345044] [2020-08-19 05:59:48,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 05:59:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 05:59:48,381 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 05:59:48,381 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 05:59:48,386 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 05:59:48,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 05:59:48 BoogieIcfgContainer [2020-08-19 05:59:48,432 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 05:59:48,440 INFO L168 Benchmark]: Toolchain (without parser) took 4694.40 ms. Allocated memory was 142.1 MB in the beginning and 276.8 MB in the end (delta: 134.7 MB). Free memory was 105.8 MB in the beginning and 208.8 MB in the end (delta: -103.0 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,441 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,443 INFO L168 Benchmark]: CACSL2BoogieTranslator took 247.93 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 96.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,443 INFO L168 Benchmark]: Boogie Preprocessor took 21.37 ms. Allocated memory is still 142.1 MB. Free memory was 96.4 MB in the beginning and 94.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,446 INFO L168 Benchmark]: RCFGBuilder took 295.25 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 94.7 MB in the beginning and 172.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,447 INFO L168 Benchmark]: TraceAbstraction took 4120.69 ms. Allocated memory was 203.4 MB in the beginning and 276.8 MB in the end (delta: 73.4 MB). Free memory was 171.2 MB in the beginning and 208.8 MB in the end (delta: -37.6 MB). Peak memory consumption was 35.8 MB. Max. memory is 7.1 GB. [2020-08-19 05:59:48,453 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 142.1 MB. Free memory was 123.6 MB in the beginning and 123.2 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 247.93 ms. Allocated memory is still 142.1 MB. Free memory was 105.4 MB in the beginning and 96.4 MB in the end (delta: 9.0 MB). Peak memory consumption was 9.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 21.37 ms. Allocated memory is still 142.1 MB. Free memory was 96.4 MB in the beginning and 94.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 1.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 295.25 ms. Allocated memory was 142.1 MB in the beginning and 203.4 MB in the end (delta: 61.3 MB). Free memory was 94.7 MB in the beginning and 172.1 MB in the end (delta: -77.4 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4120.69 ms. Allocated memory was 203.4 MB in the beginning and 276.8 MB in the end (delta: 73.4 MB). Free memory was 171.2 MB in the beginning and 208.8 MB in the end (delta: -37.6 MB). Peak memory consumption was 35.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 10; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 10 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.0s, OverallIterations: 11, TraceHistogramMax: 11, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 134 SDtfs, 163 SDslu, 424 SDs, 0 SdLazy, 255 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 270 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 473 NumberOfCodeBlocks, 473 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 390 ConstructedInterpolants, 0 QuantifiedInterpolants, 43800 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 1 PerfectInterpolantSequences, 450/900 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...