/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 log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 14:06:41,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 14:06:41,127 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 14:06:41,166 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 14:06:41,166 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 14:06:41,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 14:06:41,177 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 14:06:41,181 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 14:06:41,184 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 14:06:41,187 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 14:06:41,188 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 14:06:41,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 14:06:41,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 14:06:41,192 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 14:06:41,194 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 14:06:41,196 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 14:06:41,197 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 14:06:41,198 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 14:06:41,199 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 14:06:41,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 14:06:41,211 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 14:06:41,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 14:06:41,213 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 14:06:41,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 14:06:41,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 14:06:41,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 14:06:41,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 14:06:41,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 14:06:41,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 14:06:41,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 14:06:41,241 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 14:06:41,242 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 14:06:41,242 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 14:06:41,246 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 14:06:41,279 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 14:06:41,279 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 14:06:41,280 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 14:06:41,281 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 14:06:41,281 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 14:06:41,281 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 14:06:41,281 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 14:06:41,282 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 14:06:41,283 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 14:06:41,283 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 14:06:41,283 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 14:06:41,283 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 14:06:41,284 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 14:06:41,284 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 14:06:41,284 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 14:06:41,284 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 14:06:41,284 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 14:06:41,285 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 14:06:41,285 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 14:06:41,285 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 14:06:41,285 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 14:06:41,285 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 14:06:41,286 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 14:06:41,286 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 14:06:41,286 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 -> log-additional-information=true; [2020-08-21 14:06:41,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 14:06:41,590 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 14:06:41,594 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 14:06:41,596 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 14:06:41,597 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 14:06:41,598 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-21 14:06:41,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dcdf0834/be5306b8db9e4db0b658f7077e20d84d/FLAGc2908047b [2020-08-21 14:06:42,138 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 14:06:42,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-21 14:06:42,146 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dcdf0834/be5306b8db9e4db0b658f7077e20d84d/FLAGc2908047b [2020-08-21 14:06:42,546 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8dcdf0834/be5306b8db9e4db0b658f7077e20d84d [2020-08-21 14:06:42,556 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 14:06:42,558 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 14:06:42,559 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 14:06:42,560 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 14:06:42,566 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 14:06:42,567 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,570 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42e65116 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42, skipping insertion in model container [2020-08-21 14:06:42,570 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 14:06:42,600 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 14:06:42,834 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:06:42,843 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 14:06:42,863 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 14:06:42,874 INFO L208 MainTranslator]: Completed translation [2020-08-21 14:06:42,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42 WrapperNode [2020-08-21 14:06:42,875 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 14:06:42,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 14:06:42,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 14:06:42,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 14:06:42,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,886 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,978 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (1/1) ... [2020-08-21 14:06:42,985 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 14:06:42,985 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 14:06:42,985 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 14:06:42,986 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 14:06:42,987 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (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 14:06:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 14:06:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 14:06:43,045 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 14:06:43,046 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 14:06:43,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 14:06:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 14:06:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 14:06:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 14:06:43,046 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 14:06:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 14:06:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 14:06:43,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 14:06:43,228 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 14:06:43,228 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 14:06:43,232 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:06:43 BoogieIcfgContainer [2020-08-21 14:06:43,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 14:06:43,234 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 14:06:43,234 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 14:06:43,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 14:06:43,238 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 02:06:42" (1/3) ... [2020-08-21 14:06:43,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347e8184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:06:43, skipping insertion in model container [2020-08-21 14:06:43,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 02:06:42" (2/3) ... [2020-08-21 14:06:43,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347e8184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 02:06:43, skipping insertion in model container [2020-08-21 14:06:43,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 02:06:43" (3/3) ... [2020-08-21 14:06:43,242 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-21 14:06:43,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 14:06:43,276 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 14:06:43,313 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 14:06:43,356 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 14:06:43,356 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 14:06:43,356 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 14:06:43,357 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 14:06:43,357 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 14:06:43,357 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 14:06:43,357 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 14:06:43,357 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 14:06:43,381 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 14:06:43,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 14:06:43,389 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:43,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:43,391 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:43,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:43,399 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 14:06:43,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:43,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578404009] [2020-08-21 14:06:43,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:43,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:43,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:43,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:43,705 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 14:06:43,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578404009] [2020-08-21 14:06:43,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:43,708 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:06:43,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86749105] [2020-08-21 14:06:43,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:06:43,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:43,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:06:43,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:43,728 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 14:06:43,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:43,787 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 14:06:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:06:43,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 14:06:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:43,800 INFO L225 Difference]: With dead ends: 40 [2020-08-21 14:06:43,800 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 14:06:43,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:43,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 14:06:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 14:06:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 14:06:43,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 14:06:43,851 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 14:06:43,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:43,852 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 14:06:43,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:06:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 14:06:43,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:06:43,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:43,855 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:43,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 14:06:43,856 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:43,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:43,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 14:06:43,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:43,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [403213644] [2020-08-21 14:06:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:43,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:43,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:43,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:43,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:43,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,013 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 14:06:44,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [403213644] [2020-08-21 14:06:44,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:44,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:06:44,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521641477] [2020-08-21 14:06:44,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:06:44,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:44,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:06:44,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:44,018 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 14:06:44,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:44,036 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 14:06:44,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:06:44,037 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 14:06:44,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:44,039 INFO L225 Difference]: With dead ends: 32 [2020-08-21 14:06:44,039 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 14:06:44,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:44,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 14:06:44,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 14:06:44,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 14:06:44,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 14:06:44,048 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 14:06:44,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:44,049 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 14:06:44,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:06:44,049 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 14:06:44,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 14:06:44,051 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:44,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:44,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 14:06:44,051 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:44,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:44,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 14:06:44,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:44,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203851017] [2020-08-21 14:06:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:44,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:44,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,338 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 14:06:44,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203851017] [2020-08-21 14:06:44,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:44,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 14:06:44,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114998153] [2020-08-21 14:06:44,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 14:06:44,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:44,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 14:06:44,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 14:06:44,341 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 14:06:44,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:44,416 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 14:06:44,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 14:06:44,417 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 14:06:44,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:44,418 INFO L225 Difference]: With dead ends: 48 [2020-08-21 14:06:44,418 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 14:06:44,419 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 14:06:44,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 14:06:44,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 14:06:44,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 14:06:44,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 14:06:44,428 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 14:06:44,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:44,429 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 14:06:44,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 14:06:44,429 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 14:06:44,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:06:44,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:44,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:44,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 14:06:44,431 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:44,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:44,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 14:06:44,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:44,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135011836] [2020-08-21 14:06:44,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:44,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 14:06:44,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1135011836] [2020-08-21 14:06:44,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 14:06:44,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 14:06:44,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420470645] [2020-08-21 14:06:44,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 14:06:44,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:44,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 14:06:44,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:44,605 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 14:06:44,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:44,660 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 14:06:44,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 14:06:44,661 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 14:06:44,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:44,662 INFO L225 Difference]: With dead ends: 50 [2020-08-21 14:06:44,663 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 14:06:44,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 14:06:44,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 14:06:44,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 14:06:44,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 14:06:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 14:06:44,672 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 14:06:44,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:44,672 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 14:06:44,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 14:06:44,672 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 14:06:44,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 14:06:44,674 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:44,674 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:44,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 14:06:44,674 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:44,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:44,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 14:06:44,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:44,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [615057481] [2020-08-21 14:06:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:44,908 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 14:06:44,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [615057481] [2020-08-21 14:06:44,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:44,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 14:06:44,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601567013] [2020-08-21 14:06:44,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 14:06:44,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:44,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 14:06:44,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 14:06:44,912 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-21 14:06:45,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:45,057 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-21 14:06:45,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 14:06:45,059 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 14:06:45,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:45,061 INFO L225 Difference]: With dead ends: 64 [2020-08-21 14:06:45,061 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 14:06:45,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 14:06:45,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 14:06:45,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-21 14:06:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 14:06:45,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-21 14:06:45,081 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-21 14:06:45,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:45,081 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-21 14:06:45,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 14:06:45,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-21 14:06:45,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 14:06:45,084 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:45,085 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:45,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 14:06:45,089 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-21 14:06:45,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:45,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628896206] [2020-08-21 14:06:45,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:45,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 14:06:45,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628896206] [2020-08-21 14:06:45,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:45,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:06:45,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832834212] [2020-08-21 14:06:45,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:06:45,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:45,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:06:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:45,556 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-21 14:06:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:45,736 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-21 14:06:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:06:45,737 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-21 14:06:45,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:45,739 INFO L225 Difference]: With dead ends: 74 [2020-08-21 14:06:45,739 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 14:06:45,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:06:45,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 14:06:45,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-21 14:06:45,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 14:06:45,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-21 14:06:45,749 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-21 14:06:45,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:45,750 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-21 14:06:45,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:06:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-21 14:06:45,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 14:06:45,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:45,752 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:45,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 14:06:45,753 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:45,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:45,753 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-21 14:06:45,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:45,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138361797] [2020-08-21 14:06:45,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:45,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-21 14:06:46,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138361797] [2020-08-21 14:06:46,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:46,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:06:46,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181439100] [2020-08-21 14:06:46,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:06:46,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:46,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:06:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:46,054 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-21 14:06:46,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:46,187 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-21 14:06:46,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:06:46,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-21 14:06:46,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:46,189 INFO L225 Difference]: With dead ends: 78 [2020-08-21 14:06:46,190 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 14:06:46,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:06:46,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 14:06:46,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-21 14:06:46,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 14:06:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-21 14:06:46,198 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-21 14:06:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:46,198 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-21 14:06:46,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:06:46,199 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-21 14:06:46,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 14:06:46,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 14:06:46,200 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 14:06:46,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 14:06:46,201 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 14:06:46,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 14:06:46,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-21 14:06:46,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 14:06:46,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004643255] [2020-08-21 14:06:46,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 14:06:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 14:06:46,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 14:06:46,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 14:06:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 14:06:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 14:06:46,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004643255] [2020-08-21 14:06:46,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 14:06:46,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 14:06:46,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78538166] [2020-08-21 14:06:46,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 14:06:46,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 14:06:46,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 14:06:46,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 14:06:46,502 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-21 14:06:46,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 14:06:46,644 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-21 14:06:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 14:06:46,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 14:06:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 14:06:46,646 INFO L225 Difference]: With dead ends: 66 [2020-08-21 14:06:46,646 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 14:06:46,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 14:06:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 14:06:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 14:06:46,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 14:06:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 14:06:46,648 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-21 14:06:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 14:06:46,649 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 14:06:46,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 14:06:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 14:06:46,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 14:06:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 14:06:46,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 14:06:46,675 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 14:06:46,676 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:06:46,676 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 14:06:46,676 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-21 14:06:46,676 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 14:06:46,676 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-21 14:06:46,676 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-21 14:06:46,677 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-21 14:06:46,677 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-21 14:06:46,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 14:06:46,677 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 14:06:46,677 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 14:06:46,677 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 14:06:46,678 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-21 14:06:46,679 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 14:06:46,679 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 14:06:46,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 02:06:46 BoogieIcfgContainer [2020-08-21 14:06:46,687 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 14:06:46,690 INFO L168 Benchmark]: Toolchain (without parser) took 4130.94 ms. Allocated memory was 139.5 MB in the beginning and 246.4 MB in the end (delta: 107.0 MB). Free memory was 102.7 MB in the beginning and 99.1 MB in the end (delta: 3.6 MB). Peak memory consumption was 110.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:46,691 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 14:06:46,691 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.07 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:46,692 INFO L168 Benchmark]: Boogie Preprocessor took 109.36 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:46,693 INFO L168 Benchmark]: RCFGBuilder took 247.43 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 167.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:46,694 INFO L168 Benchmark]: TraceAbstraction took 3452.70 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 167.1 MB in the beginning and 99.1 MB in the end (delta: 68.0 MB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. [2020-08-21 14:06:46,698 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 316.07 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 92.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.36 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.9 MB in the beginning and 180.2 MB in the end (delta: -87.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 247.43 ms. Allocated memory is still 201.9 MB. Free memory was 180.2 MB in the beginning and 167.1 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3452.70 ms. Allocated memory was 201.9 MB in the beginning and 246.4 MB in the end (delta: 44.6 MB). Free memory was 167.1 MB in the beginning and 99.1 MB in the end (delta: 68.0 MB). Peak memory consumption was 112.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, 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, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 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 correct! Received shutdown request...