/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.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 21:55:33,198 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 21:55:33,202 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 21:55:33,247 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 21:55:33,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 21:55:33,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 21:55:33,260 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 21:55:33,263 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 21:55:33,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 21:55:33,268 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 21:55:33,269 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 21:55:33,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 21:55:33,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 21:55:33,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 21:55:33,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 21:55:33,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 21:55:33,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 21:55:33,275 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 21:55:33,277 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 21:55:33,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 21:55:33,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 21:55:33,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 21:55:33,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 21:55:33,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 21:55:33,285 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 21:55:33,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 21:55:33,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 21:55:33,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 21:55:33,295 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 21:55:33,306 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 21:55:33,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 21:55:33,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 21:55:33,308 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 21:55:33,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 21:55:33,309 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 21:55:33,309 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 21:55:33,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 21:55:33,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 21:55:33,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 21:55:33,310 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 21:55:33,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 21:55:33,310 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 21:55:33,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 21:55:33,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 21:55:33,311 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 21:55:33,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 21:55:33,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 21:55:33,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 21:55:33,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 21:55:33,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 21:55:33,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 21:55:33,312 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 21:55:33,774 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 21:55:33,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 21:55:33,812 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 21:55:33,815 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 21:55:33,815 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 21:55:33,817 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-09-04 21:55:33,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2243e599c/c368de67f59d47489f56ecf050cf8154/FLAG4e66bd159 [2020-09-04 21:55:34,562 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 21:55:34,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-09-04 21:55:34,573 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2243e599c/c368de67f59d47489f56ecf050cf8154/FLAG4e66bd159 [2020-09-04 21:55:34,908 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2243e599c/c368de67f59d47489f56ecf050cf8154 [2020-09-04 21:55:34,927 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 21:55:34,930 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 21:55:34,932 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 21:55:34,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 21:55:34,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 21:55:34,939 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:55:34" (1/1) ... [2020-09-04 21:55:34,945 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba7c7c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:34, skipping insertion in model container [2020-09-04 21:55:34,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 09:55:34" (1/1) ... [2020-09-04 21:55:34,956 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 21:55:34,982 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 21:55:35,216 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:55:35,223 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 21:55:35,242 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 21:55:35,262 INFO L208 MainTranslator]: Completed translation [2020-09-04 21:55:35,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35 WrapperNode [2020-09-04 21:55:35,263 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 21:55:35,264 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 21:55:35,264 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 21:55:35,265 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 21:55:35,281 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,297 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,298 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (1/1) ... [2020-09-04 21:55:35,300 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 21:55:35,301 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 21:55:35,302 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 21:55:35,302 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 21:55:35,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (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 [2020-09-04 21:55:35,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 21:55:35,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 21:55:35,505 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-04 21:55:35,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 21:55:35,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 21:55:35,742 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 21:55:35,743 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-04 21:55:35,749 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:55:35 BoogieIcfgContainer [2020-09-04 21:55:35,749 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 21:55:35,751 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 21:55:35,751 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 21:55:35,756 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 21:55:35,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 09:55:34" (1/3) ... [2020-09-04 21:55:35,757 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db96759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:55:35, skipping insertion in model container [2020-09-04 21:55:35,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 09:55:35" (2/3) ... [2020-09-04 21:55:35,758 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6db96759 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 09:55:35, skipping insertion in model container [2020-09-04 21:55:35,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 09:55:35" (3/3) ... [2020-09-04 21:55:35,762 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-09-04 21:55:35,783 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 21:55:35,794 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 21:55:35,832 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 21:55:35,912 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 21:55:35,913 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 21:55:35,913 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 21:55:35,913 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 21:55:35,913 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 21:55:35,913 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 21:55:35,913 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 21:55:35,913 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 21:55:35,936 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-09-04 21:55:35,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 21:55:35,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:35,952 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:35,952 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:35,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:35,959 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-09-04 21:55:35,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:35,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771784446] [2020-09-04 21:55:35,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 21:55:36,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771784446] [2020-09-04 21:55:36,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:36,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:36,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438947741] [2020-09-04 21:55:36,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:36,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:36,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:36,334 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-09-04 21:55:36,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:36,457 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-09-04 21:55:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:36,459 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-04 21:55:36,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:36,476 INFO L225 Difference]: With dead ends: 44 [2020-09-04 21:55:36,476 INFO L226 Difference]: Without dead ends: 28 [2020-09-04 21:55:36,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:36,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-04 21:55:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-04 21:55:36,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-04 21:55:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-09-04 21:55:36,551 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-09-04 21:55:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:36,552 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-09-04 21:55:36,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:36,552 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-09-04 21:55:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 21:55:36,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:36,556 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, 1] [2020-09-04 21:55:36,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 21:55:36,556 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:36,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:36,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-09-04 21:55:36,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:36,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973782411] [2020-09-04 21:55:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,699 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 21:55:36,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973782411] [2020-09-04 21:55:36,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:36,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:36,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103798467] [2020-09-04 21:55:36,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:36,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:36,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:36,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:36,705 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-09-04 21:55:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:36,784 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-09-04 21:55:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:36,785 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-09-04 21:55:36,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:36,787 INFO L225 Difference]: With dead ends: 49 [2020-09-04 21:55:36,787 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 21:55:36,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 21:55:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-04 21:55:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-04 21:55:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-04 21:55:36,803 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-09-04 21:55:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:36,804 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-04 21:55:36,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-04 21:55:36,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-04 21:55:36,806 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:36,806 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, 1] [2020-09-04 21:55:36,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 21:55:36,807 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:36,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-09-04 21:55:36,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:36,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408295910] [2020-09-04 21:55:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:36,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 21:55:37,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408295910] [2020-09-04 21:55:37,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:55:37,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-04 21:55:37,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401382718] [2020-09-04 21:55:37,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 21:55:37,068 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:37,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 21:55:37,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-04 21:55:37,069 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-09-04 21:55:37,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:37,193 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-09-04 21:55:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 21:55:37,195 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-04 21:55:37,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:37,198 INFO L225 Difference]: With dead ends: 41 [2020-09-04 21:55:37,198 INFO L226 Difference]: Without dead ends: 35 [2020-09-04 21:55:37,199 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-04 21:55:37,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-04 21:55:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-09-04 21:55:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 21:55:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-04 21:55:37,212 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-09-04 21:55:37,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:37,213 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-04 21:55:37,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 21:55:37,213 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-04 21:55:37,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 21:55:37,215 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:37,215 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:37,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 21:55:37,216 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:37,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:37,216 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-09-04 21:55:37,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:37,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383647764] [2020-09-04 21:55:37,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:37,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:37,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-09-04 21:55:37,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383647764] [2020-09-04 21:55:37,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 21:55:37,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 21:55:37,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965905447] [2020-09-04 21:55:37,324 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 21:55:37,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:37,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 21:55:37,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-04 21:55:37,325 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-09-04 21:55:37,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:37,367 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-09-04 21:55:37,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 21:55:37,368 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-09-04 21:55:37,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:37,369 INFO L225 Difference]: With dead ends: 43 [2020-09-04 21:55:37,370 INFO L226 Difference]: Without dead ends: 37 [2020-09-04 21:55:37,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-04 21:55:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-04 21:55:37,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-09-04 21:55:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 21:55:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-09-04 21:55:37,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38 [2020-09-04 21:55:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:37,398 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-09-04 21:55:37,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 21:55:37,398 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-09-04 21:55:37,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-04 21:55:37,401 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:37,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:37,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 21:55:37,403 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:37,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:37,404 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-09-04 21:55:37,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:37,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098323787] [2020-09-04 21:55:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:37,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:37,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 21:55:37,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098323787] [2020-09-04 21:55:37,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:55:37,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-04 21:55:37,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204946541] [2020-09-04 21:55:37,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 21:55:37,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:37,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 21:55:37,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-09-04 21:55:37,737 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-09-04 21:55:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:37,917 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-09-04 21:55:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 21:55:37,918 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-09-04 21:55:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:37,920 INFO L225 Difference]: With dead ends: 64 [2020-09-04 21:55:37,920 INFO L226 Difference]: Without dead ends: 44 [2020-09-04 21:55:37,921 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-09-04 21:55:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-04 21:55:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-09-04 21:55:37,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-04 21:55:37,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-09-04 21:55:37,933 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-09-04 21:55:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:37,933 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-09-04 21:55:37,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 21:55:37,934 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-09-04 21:55:37,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-04 21:55:37,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:37,936 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:37,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 21:55:37,936 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:37,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:37,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1045014785, now seen corresponding path program 3 times [2020-09-04 21:55:37,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:37,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1189512482] [2020-09-04 21:55:37,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-04 21:55:38,295 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1189512482] [2020-09-04 21:55:38,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:55:38,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 21:55:38,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683950312] [2020-09-04 21:55:38,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 21:55:38,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:38,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 21:55:38,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-09-04 21:55:38,300 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-09-04 21:55:38,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:38,503 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-09-04 21:55:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 21:55:38,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-09-04 21:55:38,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:38,505 INFO L225 Difference]: With dead ends: 71 [2020-09-04 21:55:38,509 INFO L226 Difference]: Without dead ends: 51 [2020-09-04 21:55:38,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-09-04 21:55:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-04 21:55:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-09-04 21:55:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 21:55:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-09-04 21:55:38,540 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 48 [2020-09-04 21:55:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:38,541 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-09-04 21:55:38,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 21:55:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-09-04 21:55:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-04 21:55:38,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:38,549 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:38,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 21:55:38,550 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:38,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:38,551 INFO L82 PathProgramCache]: Analyzing trace with hash 485800496, now seen corresponding path program 4 times [2020-09-04 21:55:38,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:38,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445135126] [2020-09-04 21:55:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:38,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:38,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:38,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,007 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-04 21:55:39,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445135126] [2020-09-04 21:55:39,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:55:39,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-04 21:55:39,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138242572] [2020-09-04 21:55:39,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-04 21:55:39,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:39,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-04 21:55:39,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-04 21:55:39,011 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-09-04 21:55:39,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:39,274 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-09-04 21:55:39,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 21:55:39,275 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-09-04 21:55:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:39,277 INFO L225 Difference]: With dead ends: 78 [2020-09-04 21:55:39,277 INFO L226 Difference]: Without dead ends: 58 [2020-09-04 21:55:39,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-09-04 21:55:39,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-04 21:55:39,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-04 21:55:39,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-04 21:55:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-09-04 21:55:39,291 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 58 [2020-09-04 21:55:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:39,292 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-09-04 21:55:39,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-04 21:55:39,292 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-09-04 21:55:39,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-04 21:55:39,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 21:55:39,295 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 21:55:39,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 21:55:39,295 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 21:55:39,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 21:55:39,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1938626529, now seen corresponding path program 5 times [2020-09-04 21:55:39,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 21:55:39,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597598581] [2020-09-04 21:55:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 21:55:39,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 21:55:39,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 21:55:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:39,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-04 21:55:39,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 21:55:39,748 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-09-04 21:55:39,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597598581] [2020-09-04 21:55:39,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 21:55:39,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-04 21:55:39,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260467883] [2020-09-04 21:55:39,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 21:55:39,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 21:55:39,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 21:55:39,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-09-04 21:55:39,753 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2020-09-04 21:55:40,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 21:55:40,027 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-09-04 21:55:40,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-04 21:55:40,027 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-09-04 21:55:40,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 21:55:40,029 INFO L225 Difference]: With dead ends: 76 [2020-09-04 21:55:40,029 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 21:55:40,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2020-09-04 21:55:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 21:55:40,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 21:55:40,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 21:55:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 21:55:40,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2020-09-04 21:55:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 21:55:40,033 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 21:55:40,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 21:55:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 21:55:40,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 21:55:40,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 21:55:40,037 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 21:55:40,338 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,338 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,338 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,338 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,339 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,339 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 21:55:40,339 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: false [2020-09-04 21:55:40,339 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-09-04 21:55:40,339 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 17) the Hoare annotation is: true [2020-09-04 21:55:40,340 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-09-04 21:55:40,340 INFO L264 CegarLoopResult]: At program point L14(lines 14 16) the Hoare annotation is: (<= main_~result~0 5) [2020-09-04 21:55:40,340 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-09-04 21:55:40,340 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-09-04 21:55:40,340 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-09-04 21:55:40,341 INFO L271 CegarLoopResult]: At program point L14-2(lines 11 17) the Hoare annotation is: true [2020-09-04 21:55:40,341 INFO L271 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-09-04 21:55:40,341 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-09-04 21:55:40,341 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~result~0 5)) [2020-09-04 21:55:40,341 INFO L264 CegarLoopResult]: At program point idFINAL(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-09-04 21:55:40,341 INFO L264 CegarLoopResult]: At program point idEXIT(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-09-04 21:55:40,342 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-09-04 21:55:40,342 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (<= id_~ret~0 5) [2020-09-04 21:55:40,342 INFO L271 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-09-04 21:55:40,342 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-09-04 21:55:40,342 INFO L271 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-09-04 21:55:40,342 INFO L271 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: true [2020-09-04 21:55:40,343 INFO L271 CegarLoopResult]: At program point L6-1(line 6) the Hoare annotation is: true [2020-09-04 21:55:40,343 INFO L271 CegarLoopResult]: At program point L5-1(line 5) the Hoare annotation is: true [2020-09-04 21:55:40,343 INFO L271 CegarLoopResult]: At program point L6-2(line 6) the Hoare annotation is: true [2020-09-04 21:55:40,343 INFO L271 CegarLoopResult]: At program point L6-3(line 6) the Hoare annotation is: true [2020-09-04 21:55:40,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 09:55:40 BoogieIcfgContainer [2020-09-04 21:55:40,374 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 21:55:40,378 INFO L168 Benchmark]: Toolchain (without parser) took 5446.73 ms. Allocated memory was 139.5 MB in the beginning and 246.4 MB in the end (delta: 107.0 MB). Free memory was 103.9 MB in the beginning and 167.0 MB in the end (delta: -63.1 MB). Peak memory consumption was 43.9 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:40,379 INFO L168 Benchmark]: CDTParser took 1.14 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 21:55:40,380 INFO L168 Benchmark]: CACSL2BoogieTranslator took 331.79 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:40,381 INFO L168 Benchmark]: Boogie Preprocessor took 36.48 ms. Allocated memory is still 139.5 MB. Free memory was 94.3 MB in the beginning and 92.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:40,382 INFO L168 Benchmark]: RCFGBuilder took 448.03 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.9 MB in the beginning and 170.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:40,383 INFO L168 Benchmark]: TraceAbstraction took 4622.47 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 170.1 MB in the beginning and 167.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. [2020-09-04 21:55:40,388 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.14 ms. Allocated memory is still 139.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 331.79 ms. Allocated memory is still 139.5 MB. Free memory was 103.5 MB in the beginning and 94.3 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.48 ms. Allocated memory is still 139.5 MB. Free memory was 94.3 MB in the beginning and 92.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 448.03 ms. Allocated memory was 139.5 MB in the beginning and 203.9 MB in the end (delta: 64.5 MB). Free memory was 92.9 MB in the beginning and 170.8 MB in the end (delta: -77.8 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4622.47 ms. Allocated memory was 203.9 MB in the beginning and 246.4 MB in the end (delta: 42.5 MB). Free memory was 170.1 MB in the beginning and 167.0 MB in the end (delta: 3.1 MB). Peak memory consumption was 45.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: 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 - ProcedureContractResult [Line: 11]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 4]: Procedure Contract for id Derived contract for procedure id: \result <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 76 SDslu, 1103 SDs, 0 SdLazy, 398 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 11 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 30 LocationsWithAnnotation, 42 PreInvPairs, 178 NumberOfFragments, 48 HoareAnnotationTreeSize, 42 FomulaSimplifications, 594 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 30 FomulaSimplificationsInter, 227 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.1s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 316 ConstructedInterpolants, 0 QuantifiedInterpolants, 29494 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 111/281 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...