/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 0.1.25-267fbe0 [2020-07-17 17:21:15,958 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:21:15,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:21:15,975 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:21:15,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:21:15,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:21:15,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:21:15,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:21:15,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:21:15,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:21:15,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:21:15,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:21:15,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:21:15,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:21:15,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:21:15,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:21:15,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:21:15,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:21:15,992 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:21:15,994 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:21:15,995 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:21:15,996 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:21:15,997 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:21:15,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:21:16,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:21:16,008 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:21:16,009 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:21:16,010 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:21:16,011 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:21:16,021 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:21:16,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:21:16,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:21:16,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:21:16,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:21:16,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:21:16,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:21:16,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:21:16,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:21:16,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:21:16,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:21:16,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:21:16,024 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:21:16,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:21:16,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:21:16,025 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:21:16,025 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:21:16,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:21:16,025 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:21:16,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:21:16,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:21:16,026 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:21:16,026 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 [2020-07-17 17:21:16,343 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:21:16,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:21:16,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:21:16,365 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:21:16,366 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:21:16,367 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-17 17:21:16,459 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1310e2b9d/45094b5f7e184328b2d16d68c7247be2/FLAGc9363029a [2020-07-17 17:21:16,993 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:21:16,993 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_b5_o10-2.c [2020-07-17 17:21:16,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1310e2b9d/45094b5f7e184328b2d16d68c7247be2/FLAGc9363029a [2020-07-17 17:21:17,328 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1310e2b9d/45094b5f7e184328b2d16d68c7247be2 [2020-07-17 17:21:17,341 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:21:17,345 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:21:17,350 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:17,350 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:21:17,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:21:17,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716a727c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17, skipping insertion in model container [2020-07-17 17:21:17,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,365 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:21:17,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:21:17,526 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:17,531 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:21:17,548 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:17,563 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:21:17,564 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17 WrapperNode [2020-07-17 17:21:17,564 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:17,565 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:21:17,565 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:21:17,565 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:21:17,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,584 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,585 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,589 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,592 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... [2020-07-17 17:21:17,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:21:17,594 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:21:17,594 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:21:17,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:21:17,595 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-17 17:21:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:21:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:21:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 17:21:17,757 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:21:17,758 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:21:17,964 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:21:17,964 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:21:17,968 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:17 BoogieIcfgContainer [2020-07-17 17:21:17,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:21:17,969 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:21:17,969 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:21:17,972 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:21:17,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:21:17" (1/3) ... [2020-07-17 17:21:17,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f208b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:17, skipping insertion in model container [2020-07-17 17:21:17,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:17" (2/3) ... [2020-07-17 17:21:17,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61f208b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:17, skipping insertion in model container [2020-07-17 17:21:17,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:17" (3/3) ... [2020-07-17 17:21:17,976 INFO L109 eAbstractionObserver]: Analyzing ICFG id_b5_o10-2.c [2020-07-17 17:21:17,984 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:21:17,990 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:21:18,006 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:21:18,029 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:21:18,029 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:21:18,030 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:21:18,030 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:21:18,030 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:21:18,030 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:21:18,030 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:21:18,030 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:21:18,046 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-07-17 17:21:18,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-07-17 17:21:18,057 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:18,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:18,059 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:18,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:18,065 INFO L82 PathProgramCache]: Analyzing trace with hash 856871792, now seen corresponding path program 1 times [2020-07-17 17:21:18,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:18,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1074240177] [2020-07-17 17:21:18,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:21:18,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1074240177] [2020-07-17 17:21:18,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:18,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:18,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498446863] [2020-07-17 17:21:18,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:18,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:18,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:18,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:18,432 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 5 states. [2020-07-17 17:21:18,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:18,531 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-07-17 17:21:18,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:18,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-07-17 17:21:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:18,548 INFO L225 Difference]: With dead ends: 44 [2020-07-17 17:21:18,548 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 17:21:18,553 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 [2020-07-17 17:21:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 17:21:18,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 17:21:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 17:21:18,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-07-17 17:21:18,613 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 18 [2020-07-17 17:21:18,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:18,614 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-07-17 17:21:18,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-07-17 17:21:18,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 17:21:18,617 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:18,617 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] [2020-07-17 17:21:18,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:21:18,618 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:18,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:18,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1774609951, now seen corresponding path program 1 times [2020-07-17 17:21:18,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:18,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017212559] [2020-07-17 17:21:18,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:18,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:21:18,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017212559] [2020-07-17 17:21:18,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:18,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:18,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405418355] [2020-07-17 17:21:18,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:18,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:18,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:18,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:18,784 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 5 states. [2020-07-17 17:21:18,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:18,851 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2020-07-17 17:21:18,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:18,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-07-17 17:21:18,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:18,854 INFO L225 Difference]: With dead ends: 49 [2020-07-17 17:21:18,854 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:21:18,856 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 [2020-07-17 17:21:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:21:18,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-17 17:21:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-17 17:21:18,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-07-17 17:21:18,868 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2020-07-17 17:21:18,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:18,868 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-07-17 17:21:18,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:18,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-07-17 17:21:18,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-17 17:21:18,870 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:18,871 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] [2020-07-17 17:21:18,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:21:18,871 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:18,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1645321695, now seen corresponding path program 1 times [2020-07-17 17:21:18,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:18,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926429518] [2020-07-17 17:21:18,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:18,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:21:19,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926429518] [2020-07-17 17:21:19,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:19,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:21:19,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361564333] [2020-07-17 17:21:19,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:21:19,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:19,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:21:19,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:21:19,071 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2020-07-17 17:21:19,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:19,177 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-07-17 17:21:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:21:19,180 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-07-17 17:21:19,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:19,184 INFO L225 Difference]: With dead ends: 41 [2020-07-17 17:21:19,184 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 17:21:19,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:21:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 17:21:19,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-07-17 17:21:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:21:19,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-07-17 17:21:19,207 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2020-07-17 17:21:19,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:19,208 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-07-17 17:21:19,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:21:19,208 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-07-17 17:21:19,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 17:21:19,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:19,211 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] [2020-07-17 17:21:19,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:21:19,212 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:19,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:19,213 INFO L82 PathProgramCache]: Analyzing trace with hash 170302224, now seen corresponding path program 1 times [2020-07-17 17:21:19,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:19,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439963654] [2020-07-17 17:21:19,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,314 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 17:21:19,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439963654] [2020-07-17 17:21:19,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:19,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:19,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924881852] [2020-07-17 17:21:19,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:21:19,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:19,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:21:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:21:19,318 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 5 states. [2020-07-17 17:21:19,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:19,350 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-07-17 17:21:19,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:21:19,351 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-07-17 17:21:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:19,352 INFO L225 Difference]: With dead ends: 43 [2020-07-17 17:21:19,353 INFO L226 Difference]: Without dead ends: 37 [2020-07-17 17:21:19,354 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 [2020-07-17 17:21:19,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-17 17:21:19,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-17 17:21:19,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-17 17:21:19,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2020-07-17 17:21:19,364 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 38 [2020-07-17 17:21:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:19,365 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2020-07-17 17:21:19,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:21:19,365 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2020-07-17 17:21:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-07-17 17:21:19,367 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:19,367 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] [2020-07-17 17:21:19,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:21:19,368 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:19,368 INFO L82 PathProgramCache]: Analyzing trace with hash 41013968, now seen corresponding path program 2 times [2020-07-17 17:21:19,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:19,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877446089] [2020-07-17 17:21:19,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 17:21:19,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877446089] [2020-07-17 17:21:19,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:19,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:21:19,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069513166] [2020-07-17 17:21:19,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:21:19,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:19,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:21:19,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:21:19,604 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2020-07-17 17:21:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:19,754 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2020-07-17 17:21:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:21:19,754 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-07-17 17:21:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:19,756 INFO L225 Difference]: With dead ends: 64 [2020-07-17 17:21:19,756 INFO L226 Difference]: Without dead ends: 44 [2020-07-17 17:21:19,757 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 [2020-07-17 17:21:19,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-17 17:21:19,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-07-17 17:21:19,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 17:21:19,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-17 17:21:19,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2020-07-17 17:21:19,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:19,769 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-17 17:21:19,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:21:19,769 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-17 17:21:19,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 17:21:19,771 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:19,771 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] [2020-07-17 17:21:19,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:21:19,771 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:19,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:19,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1045014785, now seen corresponding path program 3 times [2020-07-17 17:21:19,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:19,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [692175592] [2020-07-17 17:21:19,773 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,008 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 17:21:20,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [692175592] [2020-07-17 17:21:20,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:20,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:21:20,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641444349] [2020-07-17 17:21:20,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:21:20,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:20,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:21:20,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:21:20,012 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-07-17 17:21:20,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:20,176 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2020-07-17 17:21:20,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:21:20,177 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-07-17 17:21:20,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:20,179 INFO L225 Difference]: With dead ends: 71 [2020-07-17 17:21:20,179 INFO L226 Difference]: Without dead ends: 51 [2020-07-17 17:21:20,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:21:20,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-17 17:21:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-07-17 17:21:20,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-07-17 17:21:20,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2020-07-17 17:21:20,190 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 48 [2020-07-17 17:21:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:20,191 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2020-07-17 17:21:20,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:21:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2020-07-17 17:21:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-07-17 17:21:20,193 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:20,194 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] [2020-07-17 17:21:20,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:21:20,194 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:20,195 INFO L82 PathProgramCache]: Analyzing trace with hash 485800496, now seen corresponding path program 4 times [2020-07-17 17:21:20,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:20,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777293298] [2020-07-17 17:21:20,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,525 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 17:21:20,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [777293298] [2020-07-17 17:21:20,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:20,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 17:21:20,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599951937] [2020-07-17 17:21:20,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 17:21:20,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:20,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 17:21:20,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:21:20,528 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 17 states. [2020-07-17 17:21:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:20,729 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-07-17 17:21:20,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 17:21:20,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 58 [2020-07-17 17:21:20,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:20,731 INFO L225 Difference]: With dead ends: 78 [2020-07-17 17:21:20,731 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 17:21:20,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:21:20,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 17:21:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-07-17 17:21:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-07-17 17:21:20,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2020-07-17 17:21:20,743 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 58 [2020-07-17 17:21:20,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:20,744 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2020-07-17 17:21:20,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 17:21:20,744 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2020-07-17 17:21:20,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-07-17 17:21:20,745 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:20,745 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] [2020-07-17 17:21:20,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:21:20,746 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:20,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:20,746 INFO L82 PathProgramCache]: Analyzing trace with hash -1938626529, now seen corresponding path program 5 times [2020-07-17 17:21:20,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:20,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980147351] [2020-07-17 17:21:20,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:20,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:21,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:21,201 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 17:21:21,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980147351] [2020-07-17 17:21:21,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:21:21,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 17:21:21,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106591552] [2020-07-17 17:21:21,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 17:21:21,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:21:21,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 17:21:21,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:21:21,206 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 20 states. [2020-07-17 17:21:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:21:21,434 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2020-07-17 17:21:21,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 17:21:21,435 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 68 [2020-07-17 17:21:21,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:21:21,436 INFO L225 Difference]: With dead ends: 76 [2020-07-17 17:21:21,436 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 17:21:21,441 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 [2020-07-17 17:21:21,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 17:21:21,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 17:21:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 17:21:21,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 17:21:21,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 68 [2020-07-17 17:21:21,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:21:21,444 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 17:21:21,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 17:21:21,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 17:21:21,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 17:21:21,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:21:21,449 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 17:21:21,670 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,671 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,671 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,671 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,671 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,671 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 17:21:21,672 INFO L264 CegarLoopResult]: At program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) the Hoare annotation is: false [2020-07-17 17:21:21,672 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 17) the Hoare annotation is: true [2020-07-17 17:21:21,672 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 11 17) the Hoare annotation is: true [2020-07-17 17:21:21,672 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: false [2020-07-17 17:21:21,672 INFO L264 CegarLoopResult]: At program point L14(lines 14 16) the Hoare annotation is: (<= main_~result~0 5) [2020-07-17 17:21:21,673 INFO L271 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: true [2020-07-17 17:21:21,673 INFO L271 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: true [2020-07-17 17:21:21,673 INFO L264 CegarLoopResult]: At program point L13-1(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-07-17 17:21:21,673 INFO L271 CegarLoopResult]: At program point L14-2(lines 11 17) the Hoare annotation is: true [2020-07-17 17:21:21,673 INFO L271 CegarLoopResult]: At program point L12-1(line 12) the Hoare annotation is: true [2020-07-17 17:21:21,673 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (<= |main_#t~ret2| 5) [2020-07-17 17:21:21,674 INFO L264 CegarLoopResult]: At program point L13-3(line 13) the Hoare annotation is: (and (<= |main_#t~ret2| 5) (<= main_~result~0 5)) [2020-07-17 17:21:21,674 INFO L264 CegarLoopResult]: At program point idFINAL(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-07-17 17:21:21,674 INFO L264 CegarLoopResult]: At program point idEXIT(lines 4 9) the Hoare annotation is: (<= |id_#res| 5) [2020-07-17 17:21:21,674 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 9) the Hoare annotation is: true [2020-07-17 17:21:21,674 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (<= id_~ret~0 5) [2020-07-17 17:21:21,674 INFO L271 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: true [2020-07-17 17:21:21,675 INFO L271 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: true [2020-07-17 17:21:21,675 INFO L271 CegarLoopResult]: At program point L7-1(line 7) the Hoare annotation is: true [2020-07-17 17:21:21,675 INFO L271 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: true [2020-07-17 17:21:21,675 INFO L271 CegarLoopResult]: At program point L6-1(line 6) the Hoare annotation is: true [2020-07-17 17:21:21,675 INFO L271 CegarLoopResult]: At program point L5-1(line 5) the Hoare annotation is: true [2020-07-17 17:21:21,676 INFO L271 CegarLoopResult]: At program point L6-2(line 6) the Hoare annotation is: true [2020-07-17 17:21:21,676 INFO L271 CegarLoopResult]: At program point L6-3(line 6) the Hoare annotation is: true [2020-07-17 17:21:21,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:21:21 BoogieIcfgContainer [2020-07-17 17:21:21,705 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:21:21,711 INFO L168 Benchmark]: Toolchain (without parser) took 4364.69 ms. Allocated memory was 141.0 MB in the beginning and 256.4 MB in the end (delta: 115.3 MB). Free memory was 100.5 MB in the beginning and 199.7 MB in the end (delta: -99.1 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,713 INFO L168 Benchmark]: CDTParser took 1.20 ms. Allocated memory is still 141.0 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,714 INFO L168 Benchmark]: CACSL2BoogieTranslator took 214.67 ms. Allocated memory is still 141.0 MB. Free memory was 100.1 MB in the beginning and 90.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,716 INFO L168 Benchmark]: Boogie Preprocessor took 28.76 ms. Allocated memory is still 141.0 MB. Free memory was 90.8 MB in the beginning and 89.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,717 INFO L168 Benchmark]: RCFGBuilder took 374.60 ms. Allocated memory was 141.0 MB in the beginning and 200.3 MB in the end (delta: 59.2 MB). Free memory was 89.4 MB in the beginning and 166.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,718 INFO L168 Benchmark]: TraceAbstraction took 3736.27 ms. Allocated memory was 200.3 MB in the beginning and 256.4 MB in the end (delta: 56.1 MB). Free memory was 166.2 MB in the beginning and 199.7 MB in the end (delta: -33.4 MB). Peak memory consumption was 136.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:21:21,725 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.20 ms. Allocated memory is still 141.0 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 214.67 ms. Allocated memory is still 141.0 MB. Free memory was 100.1 MB in the beginning and 90.8 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.76 ms. Allocated memory is still 141.0 MB. Free memory was 90.8 MB in the beginning and 89.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.60 ms. Allocated memory was 141.0 MB in the beginning and 200.3 MB in the end (delta: 59.2 MB). Free memory was 89.4 MB in the beginning and 166.9 MB in the end (delta: -77.5 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3736.27 ms. Allocated memory was 200.3 MB in the beginning and 256.4 MB in the end (delta: 56.1 MB). Free memory was 166.2 MB in the beginning and 199.7 MB in the end (delta: -33.4 MB). Peak memory consumption was 136.1 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: 3.4s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 199 SDtfs, 76 SDslu, 1103 SDs, 0 SdLazy, 398 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 192 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1.2s 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, 1.7s 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...