/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/lu.cmp.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 12:15:45,350 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 12:15:45,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 12:15:45,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 12:15:45,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 12:15:45,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 12:15:45,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 12:15:45,372 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 12:15:45,374 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 12:15:45,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 12:15:45,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 12:15:45,377 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 12:15:45,377 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 12:15:45,378 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 12:15:45,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 12:15:45,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 12:15:45,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 12:15:45,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 12:15:45,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 12:15:45,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 12:15:45,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 12:15:45,389 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 12:15:45,390 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 12:15:45,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 12:15:45,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 12:15:45,402 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 12:15:45,402 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 12:15:45,403 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 12:15:45,404 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-17 12:15:45,418 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 12:15:45,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 12:15:45,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-17 12:15:45,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-17 12:15:45,420 INFO L138 SettingsManager]: * Use SBE=true [2020-07-17 12:15:45,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 12:15:45,421 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 12:15:45,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 12:15:45,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 12:15:45,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 12:15:45,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 12:15:45,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 12:15:45,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 12:15:45,422 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 12:15:45,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 12:15:45,422 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 12:15:45,423 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 12:15:45,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 12:15:45,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-17 12:15:45,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 12:15:45,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 12:15:45,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 12:15:45,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 12:15:45,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-17 12:15:45,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-17 12:15:45,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-17 12:15:45,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-17 12:15:45,425 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 12:15:45,425 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-17 12:15:45,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-17 12:15:45,697 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 12:15:45,709 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 12:15:45,713 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 12:15:45,714 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 12:15:45,714 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 12:15:45,715 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/lu.cmp.c [2020-07-17 12:15:45,790 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c4f37d3/a00dfd0d9157457f8c7dd7212116906d/FLAG2a4e94223 [2020-07-17 12:15:46,275 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 12:15:46,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/lu.cmp.c [2020-07-17 12:15:46,284 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c4f37d3/a00dfd0d9157457f8c7dd7212116906d/FLAG2a4e94223 [2020-07-17 12:15:46,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b7c4f37d3/a00dfd0d9157457f8c7dd7212116906d [2020-07-17 12:15:46,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 12:15:46,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 12:15:46,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:46,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 12:15:46,628 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 12:15:46,629 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:46" (1/1) ... [2020-07-17 12:15:46,632 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@715cd5ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:46, skipping insertion in model container [2020-07-17 12:15:46,633 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 12:15:46" (1/1) ... [2020-07-17 12:15:46,643 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 12:15:46,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 12:15:46,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:46,907 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 12:15:47,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 12:15:47,074 INFO L208 MainTranslator]: Completed translation [2020-07-17 12:15:47,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47 WrapperNode [2020-07-17 12:15:47,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 12:15:47,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 12:15:47,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 12:15:47,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 12:15:47,090 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,090 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,102 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,103 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,127 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (1/1) ... [2020-07-17 12:15:47,134 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 12:15:47,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 12:15:47,135 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 12:15:47,135 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 12:15:47,136 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (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 12:15:47,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 12:15:47,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 12:15:47,200 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-17 12:15:47,200 INFO L138 BoogieDeclarations]: Found implementation of procedure fabs [2020-07-17 12:15:47,200 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 12:15:47,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ludcmp [2020-07-17 12:15:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 12:15:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-17 12:15:47,201 INFO L130 BoogieDeclarations]: Found specification of procedure ludcmp [2020-07-17 12:15:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure fabs [2020-07-17 12:15:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 12:15:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2020-07-17 12:15:47,202 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2020-07-17 12:15:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 12:15:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 12:15:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 12:15:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 12:15:47,673 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 12:15:47,673 INFO L295 CfgBuilder]: Removed 11 assume(true) statements. [2020-07-17 12:15:47,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:47 BoogieIcfgContainer [2020-07-17 12:15:47,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 12:15:47,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 12:15:47,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 12:15:47,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 12:15:47,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 12:15:46" (1/3) ... [2020-07-17 12:15:47,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126b2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:47, skipping insertion in model container [2020-07-17 12:15:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 12:15:47" (2/3) ... [2020-07-17 12:15:47,684 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@126b2e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 12:15:47, skipping insertion in model container [2020-07-17 12:15:47,684 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 12:15:47" (3/3) ... [2020-07-17 12:15:47,686 INFO L109 eAbstractionObserver]: Analyzing ICFG lu.cmp.c [2020-07-17 12:15:47,697 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-17 12:15:47,705 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 12:15:47,719 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 12:15:47,745 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 12:15:47,745 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 12:15:47,745 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-17 12:15:47,745 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 12:15:47,745 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 12:15:47,746 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 12:15:47,746 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 12:15:47,746 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 12:15:47,763 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-07-17 12:15:47,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 12:15:47,770 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:47,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:47,771 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:47,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:47,776 INFO L82 PathProgramCache]: Analyzing trace with hash 406725423, now seen corresponding path program 1 times [2020-07-17 12:15:47,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:47,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7486436] [2020-07-17 12:15:47,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,030 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 12:15:48,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7486436] [2020-07-17 12:15:48,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:48,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-17 12:15:48,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539893470] [2020-07-17 12:15:48,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-17 12:15:48,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:48,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-17 12:15:48,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:48,066 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 3 states. [2020-07-17 12:15:48,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:48,372 INFO L93 Difference]: Finished difference Result 127 states and 191 transitions. [2020-07-17 12:15:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-17 12:15:48,374 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-07-17 12:15:48,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:48,384 INFO L225 Difference]: With dead ends: 127 [2020-07-17 12:15:48,384 INFO L226 Difference]: Without dead ends: 24 [2020-07-17 12:15:48,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-17 12:15:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-17 12:15:48,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-07-17 12:15:48,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-07-17 12:15:48,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-07-17 12:15:48,434 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 12 [2020-07-17 12:15:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:48,434 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-07-17 12:15:48,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-17 12:15:48,435 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-07-17 12:15:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-07-17 12:15:48,435 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:48,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:48,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 12:15:48,436 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash 394719650, now seen corresponding path program 1 times [2020-07-17 12:15:48,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:48,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693896743] [2020-07-17 12:15:48,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:48,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,558 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 12:15:48,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693896743] [2020-07-17 12:15:48,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:48,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:15:48,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239926403] [2020-07-17 12:15:48,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:48,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:48,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:48,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:48,565 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 5 states. [2020-07-17 12:15:48,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:48,729 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-07-17 12:15:48,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:15:48,730 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-07-17 12:15:48,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:48,731 INFO L225 Difference]: With dead ends: 40 [2020-07-17 12:15:48,731 INFO L226 Difference]: Without dead ends: 26 [2020-07-17 12:15:48,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-17 12:15:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2020-07-17 12:15:48,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-17 12:15:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-07-17 12:15:48,748 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 12 [2020-07-17 12:15:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:48,749 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-07-17 12:15:48,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-07-17 12:15:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:15:48,751 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:48,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:48,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 12:15:48,752 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1180233829, now seen corresponding path program 1 times [2020-07-17 12:15:48,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:48,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52483069] [2020-07-17 12:15:48,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:48,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:48,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 12:15:48,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52483069] [2020-07-17 12:15:48,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:48,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 12:15:48,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487872353] [2020-07-17 12:15:48,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 12:15:48,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:48,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 12:15:48,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-07-17 12:15:48,862 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 5 states. [2020-07-17 12:15:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:49,022 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-17 12:15:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 12:15:49,023 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 12:15:49,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:49,024 INFO L225 Difference]: With dead ends: 48 [2020-07-17 12:15:49,024 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 12:15:49,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-07-17 12:15:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 12:15:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2020-07-17 12:15:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-17 12:15:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-07-17 12:15:49,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 16 [2020-07-17 12:15:49,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:49,039 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-07-17 12:15:49,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 12:15:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-07-17 12:15:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 12:15:49,041 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:49,041 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:49,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 12:15:49,041 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:49,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:49,042 INFO L82 PathProgramCache]: Analyzing trace with hash -370887203, now seen corresponding path program 1 times [2020-07-17 12:15:49,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:49,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043035004] [2020-07-17 12:15:49,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-17 12:15:49,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043035004] [2020-07-17 12:15:49,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 12:15:49,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-17 12:15:49,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829223332] [2020-07-17 12:15:49,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 12:15:49,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:49,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 12:15:49,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-17 12:15:49,143 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-07-17 12:15:49,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:49,346 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-17 12:15:49,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:15:49,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-07-17 12:15:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:49,348 INFO L225 Difference]: With dead ends: 37 [2020-07-17 12:15:49,348 INFO L226 Difference]: Without dead ends: 35 [2020-07-17 12:15:49,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:15:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-17 12:15:49,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2020-07-17 12:15:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 12:15:49,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-07-17 12:15:49,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2020-07-17 12:15:49,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:49,358 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-07-17 12:15:49,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 12:15:49,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-07-17 12:15:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-17 12:15:49,359 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:49,360 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] [2020-07-17 12:15:49,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 12:15:49,360 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash 442817577, now seen corresponding path program 1 times [2020-07-17 12:15:49,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:49,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477520503] [2020-07-17 12:15:49,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:49,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,457 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 12:15:49,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477520503] [2020-07-17 12:15:49,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741421110] [2020-07-17 12:15:49,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:49,534 INFO L264 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-17 12:15:49,541 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:49,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-17 12:15:49,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:49,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2020-07-17 12:15:49,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795766823] [2020-07-17 12:15:49,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 12:15:49,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:49,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 12:15:49,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-07-17 12:15:49,605 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 8 states. [2020-07-17 12:15:49,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:49,794 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-07-17 12:15:49,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 12:15:49,795 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-07-17 12:15:49,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:49,798 INFO L225 Difference]: With dead ends: 66 [2020-07-17 12:15:49,800 INFO L226 Difference]: Without dead ends: 46 [2020-07-17 12:15:49,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-07-17 12:15:49,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-07-17 12:15:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-07-17 12:15:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-17 12:15:49,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-07-17 12:15:49,819 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 29 [2020-07-17 12:15:49,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:49,820 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-07-17 12:15:49,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 12:15:49,820 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-07-17 12:15:49,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-17 12:15:49,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 12:15:49,822 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 12:15:50,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:50,038 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 12:15:50,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 12:15:50,038 INFO L82 PathProgramCache]: Analyzing trace with hash -1798981815, now seen corresponding path program 2 times [2020-07-17 12:15:50,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-17 12:15:50,039 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34336006] [2020-07-17 12:15:50,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 12:15:50,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 12:15:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 12:15:50,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34336006] [2020-07-17 12:15:50,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147955538] [2020-07-17 12:15:50,130 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:50,189 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-07-17 12:15:50,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-17 12:15:50,190 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2020-07-17 12:15:50,193 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-17 12:15:50,223 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-17 12:15:50,247 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-07-17 12:15:50,247 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-17 12:15:50,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-07-17 12:15:50,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725748881] [2020-07-17 12:15:50,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 12:15:50,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-17 12:15:50,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 12:15:50,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-07-17 12:15:50,249 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 11 states. [2020-07-17 12:15:50,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 12:15:50,557 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-07-17 12:15:50,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 12:15:50,559 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-17 12:15:50,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 12:15:50,560 INFO L225 Difference]: With dead ends: 76 [2020-07-17 12:15:50,560 INFO L226 Difference]: Without dead ends: 0 [2020-07-17 12:15:50,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=284, Unknown=0, NotChecked=0, Total=380 [2020-07-17 12:15:50,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-17 12:15:50,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-17 12:15:50,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-17 12:15:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-17 12:15:50,562 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-07-17 12:15:50,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 12:15:50,562 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-17 12:15:50,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 12:15:50,563 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-17 12:15:50,563 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-17 12:15:50,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-17 12:15:50,766 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-17 12:15:50,984 INFO L271 CegarLoopResult]: At program point L118(line 118) the Hoare annotation is: true [2020-07-17 12:15:50,985 INFO L268 CegarLoopResult]: For program point L118-1(line 118) no Hoare annotation was computed. [2020-07-17 12:15:50,985 INFO L268 CegarLoopResult]: For program point L127-2(lines 127 133) no Hoare annotation was computed. [2020-07-17 12:15:50,985 INFO L271 CegarLoopResult]: At program point L127-3(lines 127 133) the Hoare annotation is: true [2020-07-17 12:15:50,985 INFO L268 CegarLoopResult]: For program point L119-2(lines 119 126) no Hoare annotation was computed. [2020-07-17 12:15:50,985 INFO L271 CegarLoopResult]: At program point L119-3(lines 119 126) the Hoare annotation is: true [2020-07-17 12:15:50,986 INFO L268 CegarLoopResult]: For program point L119-4(lines 119 126) no Hoare annotation was computed. [2020-07-17 12:15:50,986 INFO L268 CegarLoopResult]: For program point L144-2(lines 144 150) no Hoare annotation was computed. [2020-07-17 12:15:50,986 INFO L271 CegarLoopResult]: At program point L144-3(lines 144 150) the Hoare annotation is: true [2020-07-17 12:15:50,986 INFO L268 CegarLoopResult]: For program point L144-4(lines 144 150) no Hoare annotation was computed. [2020-07-17 12:15:50,986 INFO L268 CegarLoopResult]: For program point L136-2(lines 136 142) no Hoare annotation was computed. [2020-07-17 12:15:50,986 INFO L271 CegarLoopResult]: At program point L136-3(lines 136 142) the Hoare annotation is: true [2020-07-17 12:15:50,986 INFO L268 CegarLoopResult]: For program point L136-4(lines 136 142) no Hoare annotation was computed. [2020-07-17 12:15:50,987 INFO L268 CegarLoopResult]: For program point ludcmpEXIT(lines 109 153) no Hoare annotation was computed. [2020-07-17 12:15:50,987 INFO L264 CegarLoopResult]: At program point ludcmpENTRY(lines 109 153) the Hoare annotation is: (and (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |old(#length)| |#length|)) [2020-07-17 12:15:50,987 INFO L268 CegarLoopResult]: For program point ludcmpFINAL(lines 109 153) no Hoare annotation was computed. [2020-07-17 12:15:50,987 INFO L268 CegarLoopResult]: For program point L130-2(lines 130 131) no Hoare annotation was computed. [2020-07-17 12:15:50,987 INFO L271 CegarLoopResult]: At program point L130-3(lines 130 131) the Hoare annotation is: true [2020-07-17 12:15:50,987 INFO L268 CegarLoopResult]: For program point L130-4(lines 130 131) no Hoare annotation was computed. [2020-07-17 12:15:50,988 INFO L268 CegarLoopResult]: For program point L122(lines 122 124) no Hoare annotation was computed. [2020-07-17 12:15:50,988 INFO L268 CegarLoopResult]: For program point L122-1(lines 122 124) no Hoare annotation was computed. [2020-07-17 12:15:50,988 INFO L268 CegarLoopResult]: For program point L147-2(lines 147 148) no Hoare annotation was computed. [2020-07-17 12:15:50,988 INFO L271 CegarLoopResult]: At program point L147-3(lines 147 148) the Hoare annotation is: true [2020-07-17 12:15:50,988 INFO L268 CegarLoopResult]: For program point L147-4(lines 147 148) no Hoare annotation was computed. [2020-07-17 12:15:50,988 INFO L268 CegarLoopResult]: For program point L139-2(lines 139 140) no Hoare annotation was computed. [2020-07-17 12:15:50,989 INFO L271 CegarLoopResult]: At program point L139-3(lines 139 140) the Hoare annotation is: true [2020-07-17 12:15:50,989 INFO L268 CegarLoopResult]: For program point L139-4(lines 139 140) no Hoare annotation was computed. [2020-07-17 12:15:50,989 INFO L268 CegarLoopResult]: For program point L123-2(lines 123 124) no Hoare annotation was computed. [2020-07-17 12:15:50,989 INFO L271 CegarLoopResult]: At program point L123-3(lines 123 124) the Hoare annotation is: true [2020-07-17 12:15:50,989 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-07-17 12:15:50,990 INFO L268 CegarLoopResult]: For program point L116-2(lines 116 134) no Hoare annotation was computed. [2020-07-17 12:15:50,990 INFO L271 CegarLoopResult]: At program point L116-3(lines 116 134) the Hoare annotation is: true [2020-07-17 12:15:50,990 INFO L268 CegarLoopResult]: For program point L116-4(lines 116 134) no Hoare annotation was computed. [2020-07-17 12:15:50,990 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:15:50,990 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |~#a~0.base| |old(~#a~0.base)|) (= |~#b~0.base| |old(~#b~0.base)|) (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |~#b~0.offset| |old(~#b~0.offset)|) (= |~#x~0.base| |old(~#x~0.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |~#x~0.offset| |old(~#x~0.offset)|) (= |~#a~0.offset| |old(~#a~0.offset)|) (= |old(#length)| |#length|)) [2020-07-17 12:15:50,990 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:15:50,991 INFO L268 CegarLoopResult]: For program point L78(lines 78 79) no Hoare annotation was computed. [2020-07-17 12:15:50,991 INFO L268 CegarLoopResult]: For program point L78-2(lines 78 79) no Hoare annotation was computed. [2020-07-17 12:15:50,992 INFO L268 CegarLoopResult]: For program point fabsEXIT(lines 74 81) no Hoare annotation was computed. [2020-07-17 12:15:50,992 INFO L271 CegarLoopResult]: At program point fabsENTRY(lines 74 81) the Hoare annotation is: true [2020-07-17 12:15:50,992 INFO L268 CegarLoopResult]: For program point fabsFINAL(lines 74 81) no Hoare annotation was computed. [2020-07-17 12:15:50,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-17 12:15:50,993 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-17 12:15:50,993 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-17 12:15:50,993 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-17 12:15:50,994 INFO L268 CegarLoopResult]: For program point L97(line 97) no Hoare annotation was computed. [2020-07-17 12:15:50,994 INFO L268 CegarLoopResult]: For program point L97-2(line 97) no Hoare annotation was computed. [2020-07-17 12:15:50,994 INFO L268 CegarLoopResult]: For program point L91-2(lines 91 102) no Hoare annotation was computed. [2020-07-17 12:15:50,994 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 83 107) no Hoare annotation was computed. [2020-07-17 12:15:50,995 INFO L264 CegarLoopResult]: At program point L91-3(lines 91 102) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0)) [2020-07-17 12:15:50,995 INFO L271 CegarLoopResult]: At program point L91-4(lines 91 102) the Hoare annotation is: true [2020-07-17 12:15:50,995 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 83 107) no Hoare annotation was computed. [2020-07-17 12:15:50,995 INFO L268 CegarLoopResult]: For program point L104(line 104) no Hoare annotation was computed. [2020-07-17 12:15:50,995 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-07-17 12:15:50,997 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 83 107) the Hoare annotation is: (and (= |#memory_real| |old(#memory_real)|) (= |#valid| |old(#valid)|) (= |old(#length)| |#length|)) [2020-07-17 12:15:50,997 INFO L268 CegarLoopResult]: For program point L94-2(lines 94 99) no Hoare annotation was computed. [2020-07-17 12:15:50,997 INFO L264 CegarLoopResult]: At program point L94-3(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-17 12:15:50,997 INFO L264 CegarLoopResult]: At program point L94-4(lines 94 99) the Hoare annotation is: (and (<= main_~n~0 5) (<= 5 main_~n~0) (<= main_~i~0 5)) [2020-07-17 12:15:50,998 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-07-17 12:15:50,998 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:15:50,998 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-17 12:15:50,998 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-07-17 12:15:50,998 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-07-17 12:15:50,998 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-07-17 12:15:51,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 12:15:51 BoogieIcfgContainer [2020-07-17 12:15:51,021 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 12:15:51,028 INFO L168 Benchmark]: Toolchain (without parser) took 4401.99 ms. Allocated memory was 138.9 MB in the beginning and 248.0 MB in the end (delta: 109.1 MB). Free memory was 102.3 MB in the beginning and 202.4 MB in the end (delta: -100.0 MB). Peak memory consumption was 118.6 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,035 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,038 INFO L168 Benchmark]: CACSL2BoogieTranslator took 451.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 179.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,038 INFO L168 Benchmark]: Boogie Preprocessor took 58.28 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,039 INFO L168 Benchmark]: RCFGBuilder took 543.56 ms. Allocated memory is still 202.9 MB. Free memory was 177.7 MB in the beginning and 149.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,042 INFO L168 Benchmark]: TraceAbstraction took 3342.13 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 149.7 MB in the beginning and 202.4 MB in the end (delta: -52.7 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. [2020-07-17 12:15:51,050 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 138.9 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 451.74 ms. Allocated memory was 138.9 MB in the beginning and 202.9 MB in the end (delta: 64.0 MB). Free memory was 101.9 MB in the beginning and 179.7 MB in the end (delta: -77.8 MB). Peak memory consumption was 23.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 58.28 ms. Allocated memory is still 202.9 MB. Free memory was 179.7 MB in the beginning and 177.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 543.56 ms. Allocated memory is still 202.9 MB. Free memory was 177.7 MB in the beginning and 149.7 MB in the end (delta: 28.0 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3342.13 ms. Allocated memory was 202.9 MB in the beginning and 248.0 MB in the end (delta: 45.1 MB). Free memory was 149.7 MB in the beginning and 202.4 MB in the end (delta: -52.7 MB). Peak memory consumption was 102.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 116]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 94]: Loop Invariant Derived loop invariant: (n <= 5 && 5 <= n) && i <= 5 - InvariantResult [Line: 127]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 144]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 123]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 139]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 91]: Loop Invariant Derived loop invariant: n <= 5 && 5 <= n - InvariantResult [Line: 119]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 130]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 136]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 147]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 64 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 142 SDtfs, 143 SDslu, 120 SDs, 0 SdLazy, 348 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=0, 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, 6 MinimizatonAttempts, 26 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 21 LocationsWithAnnotation, 52 PreInvPairs, 86 NumberOfFragments, 96 HoareAnnotationTreeSize, 52 FomulaSimplifications, 475 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 21 FomulaSimplificationsInter, 172 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 188 NumberOfCodeBlocks, 163 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 180 ConstructedInterpolants, 0 QuantifiedInterpolants, 14542 SizeOfPredicates, 5 NumberOfNonLiveVariables, 230 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 72/102 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...