/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/loop-lit/bhmr2007.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 18:08:45,917 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 18:08:45,919 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 18:08:45,931 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 18:08:45,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 18:08:45,932 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 18:08:45,934 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 18:08:45,936 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 18:08:45,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 18:08:45,938 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 18:08:45,939 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 18:08:45,940 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 18:08:45,941 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 18:08:45,942 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 18:08:45,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 18:08:45,944 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 18:08:45,945 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 18:08:45,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 18:08:45,948 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 18:08:45,949 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 18:08:45,951 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 18:08:45,952 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 18:08:45,953 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 18:08:45,953 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 18:08:45,956 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 18:08:45,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 18:08:45,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 18:08:45,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 18:08:45,965 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 18:08:45,974 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 18:08:45,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 18:08:45,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 18:08:45,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 18:08:45,977 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 18:08:45,978 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 18:08:45,978 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 18:08:45,978 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 18:08:45,978 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 18:08:45,979 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 18:08:45,979 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 18:08:45,979 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 18:08:45,979 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 18:08:45,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 18:08:45,979 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 18:08:45,980 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 18:08:45,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 18:08:45,980 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 18:08:46,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 18:08:46,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 18:08:46,276 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 18:08:46,277 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 18:08:46,278 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 18:08:46,278 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-17 18:08:46,342 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9227b1859/d9427c3394b447ac86002e7eceb6caaa/FLAG71ec226f7 [2020-07-17 18:08:46,778 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 18:08:46,779 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/bhmr2007.i [2020-07-17 18:08:46,786 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9227b1859/d9427c3394b447ac86002e7eceb6caaa/FLAG71ec226f7 [2020-07-17 18:08:47,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9227b1859/d9427c3394b447ac86002e7eceb6caaa [2020-07-17 18:08:47,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 18:08:47,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 18:08:47,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:47,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 18:08:47,203 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 18:08:47,204 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,208 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@304daafe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47, skipping insertion in model container [2020-07-17 18:08:47,208 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 18:08:47,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 18:08:47,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:47,419 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 18:08:47,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 18:08:47,453 INFO L208 MainTranslator]: Completed translation [2020-07-17 18:08:47,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47 WrapperNode [2020-07-17 18:08:47,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 18:08:47,454 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 18:08:47,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 18:08:47,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 18:08:47,466 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,471 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,472 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,475 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (1/1) ... [2020-07-17 18:08:47,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 18:08:47,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 18:08:47,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 18:08:47,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 18:08:47,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (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 18:08:47,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 18:08:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 18:08:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-17 18:08:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 18:08:47,641 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 18:08:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 18:08:47,641 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 18:08:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-17 18:08:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 18:08:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 18:08:47,642 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 18:08:47,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 18:08:47,644 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 18:08:47,873 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 18:08:47,874 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-17 18:08:47,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:47 BoogieIcfgContainer [2020-07-17 18:08:47,878 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 18:08:47,880 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 18:08:47,880 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 18:08:47,883 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 18:08:47,884 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 06:08:47" (1/3) ... [2020-07-17 18:08:47,884 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5235bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:47, skipping insertion in model container [2020-07-17 18:08:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 06:08:47" (2/3) ... [2020-07-17 18:08:47,885 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5235bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 06:08:47, skipping insertion in model container [2020-07-17 18:08:47,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 06:08:47" (3/3) ... [2020-07-17 18:08:47,887 INFO L109 eAbstractionObserver]: Analyzing ICFG bhmr2007.i [2020-07-17 18:08:47,898 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 18:08:47,906 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 18:08:47,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 18:08:47,979 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 18:08:47,979 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 18:08:47,980 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 18:08:47,980 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 18:08:47,980 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 18:08:47,980 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 18:08:47,980 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 18:08:47,980 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 18:08:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-07-17 18:08:48,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-07-17 18:08:48,014 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,016 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:48,016 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,023 INFO L82 PathProgramCache]: Analyzing trace with hash 317967837, now seen corresponding path program 1 times [2020-07-17 18:08:48,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612581231] [2020-07-17 18:08:48,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:48,433 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 18:08:48,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612581231] [2020-07-17 18:08:48,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 18:08:48,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-17 18:08:48,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798427410] [2020-07-17 18:08:48,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 18:08:48,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:48,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 18:08:48,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-07-17 18:08:48,460 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 9 states. [2020-07-17 18:08:48,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:48,772 INFO L93 Difference]: Finished difference Result 70 states and 80 transitions. [2020-07-17 18:08:48,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 18:08:48,774 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 20 [2020-07-17 18:08:48,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:48,783 INFO L225 Difference]: With dead ends: 70 [2020-07-17 18:08:48,784 INFO L226 Difference]: Without dead ends: 40 [2020-07-17 18:08:48,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-17 18:08:48,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-17 18:08:48,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2020-07-17 18:08:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-07-17 18:08:48,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-07-17 18:08:48,834 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 20 [2020-07-17 18:08:48,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:48,835 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-07-17 18:08:48,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 18:08:48,835 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-07-17 18:08:48,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 18:08:48,837 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:48,837 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:48,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 18:08:48,838 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:48,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:48,838 INFO L82 PathProgramCache]: Analyzing trace with hash -628039010, now seen corresponding path program 1 times [2020-07-17 18:08:48,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:48,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941491235] [2020-07-17 18:08:48,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941491235] [2020-07-17 18:08:49,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:08:49,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457698949] [2020-07-17 18:08:49,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:08:49,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:08:49,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:49,122 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 12 states. [2020-07-17 18:08:49,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:49,433 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2020-07-17 18:08:49,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:08:49,434 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-17 18:08:49,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:49,435 INFO L225 Difference]: With dead ends: 53 [2020-07-17 18:08:49,436 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 18:08:49,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:08:49,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 18:08:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 38. [2020-07-17 18:08:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-17 18:08:49,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2020-07-17 18:08:49,448 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2020-07-17 18:08:49,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:49,449 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2020-07-17 18:08:49,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:08:49,449 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2020-07-17 18:08:49,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-17 18:08:49,450 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:49,451 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 18:08:49,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 18:08:49,451 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:49,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1791276066, now seen corresponding path program 1 times [2020-07-17 18:08:49,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:49,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055187607] [2020-07-17 18:08:49,452 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:49,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:49,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 18:08:49,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055187607] [2020-07-17 18:08:49,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:49,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 18:08:49,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860472053] [2020-07-17 18:08:49,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 18:08:49,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:49,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 18:08:49,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-07-17 18:08:49,696 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2020-07-17 18:08:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,034 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-07-17 18:08:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 18:08:50,034 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2020-07-17 18:08:50,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,036 INFO L225 Difference]: With dead ends: 54 [2020-07-17 18:08:50,036 INFO L226 Difference]: Without dead ends: 49 [2020-07-17 18:08:50,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-07-17 18:08:50,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-07-17 18:08:50,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2020-07-17 18:08:50,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-07-17 18:08:50,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2020-07-17 18:08:50,048 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 27 [2020-07-17 18:08:50,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,049 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2020-07-17 18:08:50,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 18:08:50,049 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2020-07-17 18:08:50,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 18:08:50,050 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,051 INFO L422 BasicCegarLoop]: trace histogram [2, 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 18:08:50,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 18:08:50,051 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1600642371, now seen corresponding path program 2 times [2020-07-17 18:08:50,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [152710990] [2020-07-17 18:08:50,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 18:08:50,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [152710990] [2020-07-17 18:08:50,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:50,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 18:08:50,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617804494] [2020-07-17 18:08:50,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 18:08:50,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:50,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 18:08:50,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:08:50,365 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 14 states. [2020-07-17 18:08:50,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:50,838 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-07-17 18:08:50,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 18:08:50,844 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-17 18:08:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:50,845 INFO L225 Difference]: With dead ends: 58 [2020-07-17 18:08:50,845 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 18:08:50,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:08:50,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 18:08:50,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 45. [2020-07-17 18:08:50,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-17 18:08:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-17 18:08:50,866 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 34 [2020-07-17 18:08:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:50,867 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-17 18:08:50,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 18:08:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-17 18:08:50,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 18:08:50,869 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:50,870 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2020-07-17 18:08:50,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 18:08:50,870 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:50,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:50,871 INFO L82 PathProgramCache]: Analyzing trace with hash 1531087869, now seen corresponding path program 1 times [2020-07-17 18:08:50,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:50,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845545235] [2020-07-17 18:08:50,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 18:08:51,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845545235] [2020-07-17 18:08:51,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:51,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 18:08:51,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983262202] [2020-07-17 18:08:51,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 18:08:51,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:51,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 18:08:51,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:08:51,211 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 14 states. [2020-07-17 18:08:51,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:51,761 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2020-07-17 18:08:51,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 18:08:51,761 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-17 18:08:51,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:51,763 INFO L225 Difference]: With dead ends: 65 [2020-07-17 18:08:51,763 INFO L226 Difference]: Without dead ends: 60 [2020-07-17 18:08:51,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2020-07-17 18:08:51,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-17 18:08:51,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-07-17 18:08:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-17 18:08:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-07-17 18:08:51,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 34 [2020-07-17 18:08:51,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:51,772 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-07-17 18:08:51,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 18:08:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-07-17 18:08:51,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-17 18:08:51,774 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:51,774 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1] [2020-07-17 18:08:51,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 18:08:51,774 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:51,775 INFO L82 PathProgramCache]: Analyzing trace with hash -966733443, now seen corresponding path program 2 times [2020-07-17 18:08:51,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:51,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449396731] [2020-07-17 18:08:51,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:51,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 18:08:52,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449396731] [2020-07-17 18:08:52,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:52,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 18:08:52,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698728228] [2020-07-17 18:08:52,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 18:08:52,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 18:08:52,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-07-17 18:08:52,016 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 14 states. [2020-07-17 18:08:52,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:52,518 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-07-17 18:08:52,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 18:08:52,519 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-07-17 18:08:52,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:52,520 INFO L225 Difference]: With dead ends: 85 [2020-07-17 18:08:52,520 INFO L226 Difference]: Without dead ends: 79 [2020-07-17 18:08:52,522 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2020-07-17 18:08:52,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-07-17 18:08:52,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 55. [2020-07-17 18:08:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-17 18:08:52,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2020-07-17 18:08:52,544 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 34 [2020-07-17 18:08:52,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:52,544 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2020-07-17 18:08:52,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 18:08:52,544 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2020-07-17 18:08:52,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 18:08:52,546 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 18:08:52,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 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 18:08:52,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 18:08:52,546 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 18:08:52,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 18:08:52,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1509294206, now seen corresponding path program 3 times [2020-07-17 18:08:52,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 18:08:52,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651367751] [2020-07-17 18:08:52,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 18:08:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 18:08:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-17 18:08:52,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651367751] [2020-07-17 18:08:52,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 18:08:52,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 18:08:52,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822600180] [2020-07-17 18:08:52,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 18:08:52,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 18:08:52,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 18:08:52,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-07-17 18:08:52,853 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 15 states. [2020-07-17 18:08:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 18:08:53,356 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2020-07-17 18:08:53,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 18:08:53,356 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-07-17 18:08:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 18:08:53,357 INFO L225 Difference]: With dead ends: 63 [2020-07-17 18:08:53,357 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 18:08:53,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2020-07-17 18:08:53,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 18:08:53,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 18:08:53,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 18:08:53,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 18:08:53,359 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 41 [2020-07-17 18:08:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 18:08:53,359 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 18:08:53,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 18:08:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 18:08:53,360 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 18:08:53,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 18:08:53,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 18:08:53,740 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,740 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,740 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,741 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,741 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,741 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-17 18:08:53,741 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:08:53,741 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:08:53,742 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-17 18:08:53,742 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-17 18:08:53,742 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-17 18:08:53,742 INFO L271 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: true [2020-07-17 18:08:53,743 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 29) the Hoare annotation is: true [2020-07-17 18:08:53,743 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 2)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-07-17 18:08:53,743 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,743 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-17 18:08:53,743 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 26) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 (* 3 main_~n~0)) (<= .cse1 .cse0) (<= .cse0 .cse1))) [2020-07-17 18:08:53,744 INFO L264 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-07-17 18:08:53,744 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 26) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~n~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,744 INFO L264 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= (* 3 main_~i~0) main_~a~0)) [2020-07-17 18:08:53,744 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 29) the Hoare annotation is: true [2020-07-17 18:08:53,745 INFO L264 CegarLoopResult]: At program point L15-3(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-17 18:08:53,745 INFO L264 CegarLoopResult]: At program point L15-4(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-17 18:08:53,745 INFO L264 CegarLoopResult]: At program point L15-5(line 15) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-17 18:08:53,745 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 29) the Hoare annotation is: true [2020-07-17 18:08:53,745 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,746 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse1 (+ (* 3 main_~i~0) 1)) (.cse0 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= (+ main_~a~0 main_~b~0 2) (* 3 main_~n~0)))) [2020-07-17 18:08:53,746 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,746 INFO L264 CegarLoopResult]: At program point L18-1(lines 18 24) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,746 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= 0 main_~i~0) (<= main_~a~0 0) (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse0 main_~a~0))) [2020-07-17 18:08:53,746 INFO L264 CegarLoopResult]: At program point L18-2(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,747 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (let ((.cse0 (+ main_~a~0 main_~b~0)) (.cse1 (* 3 main_~i~0))) (and (<= .cse0 0) (<= main_~a~0 0) (<= .cse1 .cse0) (<= .cse1 main_~a~0))) [2020-07-17 18:08:53,747 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-07-17 18:08:53,747 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse1 (+ main_~a~0 main_~b~0)) (.cse0 (* 3 main_~i~0))) (and (<= (+ main_~a~0 main_~b~0 3) (* 3 main_~n~0)) (<= .cse0 .cse1) (<= .cse1 .cse0))) [2020-07-17 18:08:53,747 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-07-17 18:08:53,747 INFO L264 CegarLoopResult]: At program point L18-5(lines 18 24) the Hoare annotation is: (let ((.cse0 (+ (* 3 main_~i~0) 3)) (.cse1 (+ main_~a~0 main_~b~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 (* 3 main_~n~0)))) [2020-07-17 18:08:53,747 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-07-17 18:08:53,747 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-17 18:08:53,748 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:08:53,748 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 18:08:53,748 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:08:53,748 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-17 18:08:53,748 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-17 18:08:53,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 06:08:53 BoogieIcfgContainer [2020-07-17 18:08:53,765 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 18:08:53,768 INFO L168 Benchmark]: Toolchain (without parser) took 6570.13 ms. Allocated memory was 134.7 MB in the beginning and 298.3 MB in the end (delta: 163.6 MB). Free memory was 98.7 MB in the beginning and 101.3 MB in the end (delta: -2.7 MB). Peak memory consumption was 160.9 MB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,769 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 134.7 MB. Free memory was 116.9 MB in the beginning and 116.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.45 ms. Allocated memory is still 134.7 MB. Free memory was 98.3 MB in the beginning and 88.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,771 INFO L168 Benchmark]: Boogie Preprocessor took 112.89 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 88.8 MB in the beginning and 179.3 MB in the end (delta: -90.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,772 INFO L168 Benchmark]: RCFGBuilder took 310.81 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 163.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,773 INFO L168 Benchmark]: TraceAbstraction took 5885.58 ms. Allocated memory was 199.2 MB in the beginning and 298.3 MB in the end (delta: 99.1 MB). Free memory was 163.9 MB in the beginning and 101.3 MB in the end (delta: 62.5 MB). Peak memory consumption was 161.6 MB. Max. memory is 7.1 GB. [2020-07-17 18:08:53,777 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 134.7 MB. Free memory was 116.9 MB in the beginning and 116.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 254.45 ms. Allocated memory is still 134.7 MB. Free memory was 98.3 MB in the beginning and 88.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.89 ms. Allocated memory was 134.7 MB in the beginning and 199.2 MB in the end (delta: 64.5 MB). Free memory was 88.8 MB in the beginning and 179.3 MB in the end (delta: -90.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 310.81 ms. Allocated memory is still 199.2 MB. Free memory was 179.3 MB in the beginning and 163.9 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5885.58 ms. Allocated memory was 199.2 MB in the beginning and 298.3 MB in the end (delta: 99.1 MB). Free memory was 163.9 MB in the beginning and 101.3 MB in the end (delta: 62.5 MB). Peak memory consumption was 161.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: (a + b <= 3 * n && 3 * i <= a + b) && a + b <= 3 * i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 43 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.3s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 172 SDtfs, 322 SDslu, 1116 SDs, 0 SdLazy, 935 SolverSat, 80 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=55occurred in iteration=6, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 77 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 38 LocationsWithAnnotation, 86 PreInvPairs, 143 NumberOfFragments, 443 HoareAnnotationTreeSize, 86 FomulaSimplifications, 7566 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 38 FomulaSimplificationsInter, 93 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 217 NumberOfCodeBlocks, 217 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 210 ConstructedInterpolants, 0 QuantifiedInterpolants, 71212 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 9/41 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...