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/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:16:43,911 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:16:43,914 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:16:43,932 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:16:43,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:16:43,934 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:16:43,936 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:16:43,946 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:16:43,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:16:43,949 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:16:43,951 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:16:43,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:16:43,953 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:16:43,956 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:16:43,958 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:16:43,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:16:43,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:16:43,963 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:16:43,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:16:43,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:16:43,972 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:16:43,975 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:16:43,977 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:16:43,978 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:16:43,980 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:16:43,985 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:16:43,986 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:16:43,987 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:16:43,987 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:16:43,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:16:43,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:16:43,991 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:16:43,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:16:43,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:16:43,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:16:43,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:16:43,994 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 [2019-10-14 23:16:44,022 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:16:44,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:16:44,024 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:16:44,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:16:44,025 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:16:44,025 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:16:44,026 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:16:44,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:16:44,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:16:44,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:16:44,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:16:44,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:16:44,028 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:16:44,028 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:16:44,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:16:44,028 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:16:44,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:16:44,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:16:44,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:16:44,030 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:16:44,031 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:16:44,032 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:16:44,032 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:16:44,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:16:44,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:16:44,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:16:44,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:16:44,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:16:44,035 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:16:44,298 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:16:44,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:16:44,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:16:44,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:16:44,316 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:16:44,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2019-10-14 23:16:44,393 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b808d9da2/a5a2e877dea64d2c84ef19ab441a6ef4/FLAG4b71c31d8 [2019-10-14 23:16:44,842 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:16:44,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2019-10-14 23:16:44,849 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b808d9da2/a5a2e877dea64d2c84ef19ab441a6ef4/FLAG4b71c31d8 [2019-10-14 23:16:45,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b808d9da2/a5a2e877dea64d2c84ef19ab441a6ef4 [2019-10-14 23:16:45,265 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:16:45,267 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:16:45,268 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:45,268 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:16:45,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:16:45,272 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62c03921 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45, skipping insertion in model container [2019-10-14 23:16:45,275 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,281 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:16:45,298 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:16:45,477 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:45,481 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:16:45,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:16:45,609 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:16:45,610 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45 WrapperNode [2019-10-14 23:16:45,610 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:16:45,611 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:16:45,611 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:16:45,612 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:16:45,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,626 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,634 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,651 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,652 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (1/1) ... [2019-10-14 23:16:45,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:16:45,655 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:16:45,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:16:45,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:16:45,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (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 [2019-10-14 23:16:45,719 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:16:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:16:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 23:16:45,720 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:16:45,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 23:16:45,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 23:16:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 23:16:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 23:16:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:16:45,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:16:46,068 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:16:46,068 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-14 23:16:46,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:46 BoogieIcfgContainer [2019-10-14 23:16:46,070 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:16:46,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:16:46,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:16:46,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:16:46,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:16:45" (1/3) ... [2019-10-14 23:16:46,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe52f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:46, skipping insertion in model container [2019-10-14 23:16:46,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:16:45" (2/3) ... [2019-10-14 23:16:46,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47fe52f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:16:46, skipping insertion in model container [2019-10-14 23:16:46,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:16:46" (3/3) ... [2019-10-14 23:16:46,080 INFO L109 eAbstractionObserver]: Analyzing ICFG string-1.i [2019-10-14 23:16:46,088 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:16:46,095 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:16:46,107 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:16:46,130 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:16:46,131 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:16:46,131 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:16:46,131 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:16:46,131 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:16:46,131 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:16:46,131 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:16:46,132 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:16:46,151 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2019-10-14 23:16:46,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:16:46,157 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:46,158 INFO L380 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] [2019-10-14 23:16:46,160 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:46,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:46,165 INFO L82 PathProgramCache]: Analyzing trace with hash -99599224, now seen corresponding path program 1 times [2019-10-14 23:16:46,172 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:46,172 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857578263] [2019-10-14 23:16:46,172 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,173 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,173 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:46,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857578263] [2019-10-14 23:16:46,362 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:46,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:16:46,363 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604772921] [2019-10-14 23:16:46,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:16:46,369 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:16:46,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:16:46,383 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2019-10-14 23:16:46,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:46,525 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2019-10-14 23:16:46,525 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:16:46,527 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-10-14 23:16:46,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:46,536 INFO L225 Difference]: With dead ends: 62 [2019-10-14 23:16:46,536 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:16:46,540 INFO L600 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 [2019-10-14 23:16:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:16:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:16:46,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:16:46,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 23:16:46,583 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 22 [2019-10-14 23:16:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:46,584 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 23:16:46,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:16:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 23:16:46,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:16:46,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:46,586 INFO L380 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] [2019-10-14 23:16:46,586 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:46,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:46,587 INFO L82 PathProgramCache]: Analyzing trace with hash 930552028, now seen corresponding path program 1 times [2019-10-14 23:16:46,587 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:46,587 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043534112] [2019-10-14 23:16:46,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,587 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,588 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:46,680 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043534112] [2019-10-14 23:16:46,680 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:16:46,681 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:16:46,681 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488463517] [2019-10-14 23:16:46,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:16:46,685 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:46,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:16:46,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:46,687 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 23:16:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:46,822 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2019-10-14 23:16:46,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:16:46,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-14 23:16:46,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:46,826 INFO L225 Difference]: With dead ends: 56 [2019-10-14 23:16:46,827 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:46,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:16:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:46,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-10-14 23:16:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:46,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-14 23:16:46,838 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 24 [2019-10-14 23:16:46,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:46,839 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-14 23:16:46,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:16:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-14 23:16:46,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:46,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:46,840 INFO L380 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, 1] [2019-10-14 23:16:46,841 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:46,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:46,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1358146588, now seen corresponding path program 1 times [2019-10-14 23:16:46,843 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:46,844 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027036212] [2019-10-14 23:16:46,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,844 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:46,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:46,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:46,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:46,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027036212] [2019-10-14 23:16:46,948 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297385623] [2019-10-14 23:16:46,949 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 [2019-10-14 23:16:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 23:16:47,020 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:16:47,060 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:47,060 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 23:16:47,060 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580551247] [2019-10-14 23:16:47,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:16:47,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:16:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:47,062 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 6 states. [2019-10-14 23:16:47,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:47,207 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2019-10-14 23:16:47,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:47,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 23:16:47,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:47,209 INFO L225 Difference]: With dead ends: 65 [2019-10-14 23:16:47,209 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:16:47,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:16:47,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:16:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2019-10-14 23:16:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:16:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2019-10-14 23:16:47,217 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2019-10-14 23:16:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:47,217 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2019-10-14 23:16:47,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:16:47,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2019-10-14 23:16:47,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:47,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:47,219 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:16:47,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:47,424 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:47,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:47,425 INFO L82 PathProgramCache]: Analyzing trace with hash -1752396196, now seen corresponding path program 2 times [2019-10-14 23:16:47,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:47,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243565020] [2019-10-14 23:16:47,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:47,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 23:16:47,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243565020] [2019-10-14 23:16:47,558 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543796864] [2019-10-14 23:16:47,558 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 [2019-10-14 23:16:47,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:16:47,607 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:47,608 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:16:47,611 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:47,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:47,678 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 23:16:47,679 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:47,679 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 11 [2019-10-14 23:16:47,679 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899635292] [2019-10-14 23:16:47,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:47,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:47,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:47,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:47,681 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2019-10-14 23:16:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:47,754 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-10-14 23:16:47,755 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:16:47,755 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2019-10-14 23:16:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:47,756 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:16:47,756 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:47,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:16:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:47,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:16:47,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2019-10-14 23:16:47,763 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 32 [2019-10-14 23:16:47,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:47,763 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2019-10-14 23:16:47,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:47,764 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2019-10-14 23:16:47,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:47,765 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:47,765 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1] [2019-10-14 23:16:47,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:47,969 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:47,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:47,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1002288759, now seen corresponding path program 1 times [2019-10-14 23:16:47,969 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:47,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31798497] [2019-10-14 23:16:47,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,970 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:47,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:16:48,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31798497] [2019-10-14 23:16:48,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781116197] [2019-10-14 23:16:48,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:16:48,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 23:16:48,122 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:48,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 23:16:48,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285639533] [2019-10-14 23:16:48,123 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 23:16:48,123 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:48,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 23:16:48,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:48,124 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 7 states. [2019-10-14 23:16:48,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:48,243 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2019-10-14 23:16:48,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 23:16:48,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2019-10-14 23:16:48,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:48,245 INFO L225 Difference]: With dead ends: 79 [2019-10-14 23:16:48,245 INFO L226 Difference]: Without dead ends: 54 [2019-10-14 23:16:48,245 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 23:16:48,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-14 23:16:48,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 40. [2019-10-14 23:16:48,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:48,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2019-10-14 23:16:48,252 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 34 [2019-10-14 23:16:48,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:48,253 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2019-10-14 23:16:48,253 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 23:16:48,253 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2019-10-14 23:16:48,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:16:48,254 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:48,254 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:16:48,455 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:48,456 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 515659703, now seen corresponding path program 2 times [2019-10-14 23:16:48,457 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:48,457 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319978637] [2019-10-14 23:16:48,457 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,458 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:48,458 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:48,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-14 23:16:48,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319978637] [2019-10-14 23:16:48,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190668231] [2019-10-14 23:16:48,574 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:48,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 23:16:48,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:48,616 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 23:16:48,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:48,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:16:48,668 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:48,668 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2019-10-14 23:16:48,669 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114284002] [2019-10-14 23:16:48,669 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:16:48,669 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:16:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:16:48,670 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 5 states. [2019-10-14 23:16:48,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:48,689 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2019-10-14 23:16:48,689 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:16:48,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2019-10-14 23:16:48,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:48,690 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:48,690 INFO L226 Difference]: Without dead ends: 0 [2019-10-14 23:16:48,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:16:48,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-14 23:16:48,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-14 23:16:48,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-14 23:16:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-14 23:16:48,692 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2019-10-14 23:16:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:48,693 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-14 23:16:48,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:16:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-14 23:16:48,693 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-14 23:16:48,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:48,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-14 23:16:48,994 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:48,994 INFO L439 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#valid| |old(#valid)|) (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-14 23:16:48,995 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:48,995 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-14 23:16:48,995 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-14 23:16:48,996 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-14 23:16:48,996 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-14 23:16:48,996 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 14 58) no Hoare annotation was computed. [2019-10-14 23:16:48,996 INFO L443 ceAbstractionStarter]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2019-10-14 23:16:48,996 INFO L439 ceAbstractionStarter]: At program point L23-3(lines 23 24) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-10-14 23:16:48,996 INFO L443 ceAbstractionStarter]: For program point L23-4(lines 23 24) no Hoare annotation was computed. [2019-10-14 23:16:48,997 INFO L443 ceAbstractionStarter]: For program point L19-2(lines 19 20) no Hoare annotation was computed. [2019-10-14 23:16:48,997 INFO L439 ceAbstractionStarter]: At program point L19-3(lines 19 20) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-10-14 23:16:48,997 INFO L443 ceAbstractionStarter]: For program point L19-4(lines 19 20) no Hoare annotation was computed. [2019-10-14 23:16:48,997 INFO L443 ceAbstractionStarter]: For program point L32-1(lines 32 33) no Hoare annotation was computed. [2019-10-14 23:16:48,999 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 33) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-10-14 23:16:48,999 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 15 58) no Hoare annotation was computed. [2019-10-14 23:16:48,999 INFO L443 ceAbstractionStarter]: For program point L28-1(lines 28 29) no Hoare annotation was computed. [2019-10-14 23:16:48,999 INFO L439 ceAbstractionStarter]: At program point L28-3(lines 28 29) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-10-14 23:16:48,999 INFO L443 ceAbstractionStarter]: For program point L28-4(lines 28 29) no Hoare annotation was computed. [2019-10-14 23:16:49,000 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 50) no Hoare annotation was computed. [2019-10-14 23:16:49,000 INFO L439 ceAbstractionStarter]: At program point L41-2(lines 39 51) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0) (and (<= 0 main_~j~0) (<= main_~nc_B~0 0))) [2019-10-14 23:16:49,000 INFO L443 ceAbstractionStarter]: For program point L25(line 25) no Hoare annotation was computed. [2019-10-14 23:16:49,002 INFO L443 ceAbstractionStarter]: For program point L21(line 21) no Hoare annotation was computed. [2019-10-14 23:16:49,003 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 14 58) no Hoare annotation was computed. [2019-10-14 23:16:49,003 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 14 58) the Hoare annotation is: (= |#valid| |old(#valid)|) [2019-10-14 23:16:49,003 INFO L439 ceAbstractionStarter]: At program point L55(line 55) the Hoare annotation is: (or (= 0 main_~found~0) (= 1 main_~found~0)) [2019-10-14 23:16:49,003 INFO L443 ceAbstractionStarter]: For program point L55-1(line 55) no Hoare annotation was computed. [2019-10-14 23:16:49,003 INFO L443 ceAbstractionStarter]: For program point L39-2(lines 39 51) no Hoare annotation was computed. [2019-10-14 23:16:49,004 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-10-14 23:16:49,004 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(lines 4 9) the Hoare annotation is: true [2019-10-14 23:16:49,004 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(lines 4 9) no Hoare annotation was computed. [2019-10-14 23:16:49,004 INFO L443 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-10-14 23:16:49,004 INFO L443 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-10-14 23:16:49,004 INFO L443 ceAbstractionStarter]: For program point L5-2(lines 4 9) no Hoare annotation was computed. [2019-10-14 23:16:49,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 11:16:49 BoogieIcfgContainer [2019-10-14 23:16:49,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-14 23:16:49,031 INFO L168 Benchmark]: Toolchain (without parser) took 3763.59 ms. Allocated memory was 137.9 MB in the beginning and 234.4 MB in the end (delta: 96.5 MB). Free memory was 102.8 MB in the beginning and 81.7 MB in the end (delta: 21.2 MB). Peak memory consumption was 117.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,033 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,035 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.38 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 181.6 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,036 INFO L168 Benchmark]: Boogie Preprocessor took 43.87 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,040 INFO L168 Benchmark]: RCFGBuilder took 414.49 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 160.9 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,041 INFO L168 Benchmark]: TraceAbstraction took 2955.49 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 160.2 MB in the beginning and 81.7 MB in the end (delta: 78.5 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. [2019-10-14 23:16:49,049 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 137.9 MB. Free memory was 121.2 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 343.38 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 181.6 MB in the end (delta: -79.0 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.87 ms. Allocated memory is still 202.4 MB. Free memory was 181.6 MB in the beginning and 179.2 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 414.49 ms. Allocated memory is still 202.4 MB. Free memory was 179.2 MB in the beginning and 160.9 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2955.49 ms. Allocated memory was 202.4 MB in the beginning and 234.4 MB in the end (delta: 32.0 MB). Free memory was 160.2 MB in the beginning and 81.7 MB in the end (delta: 78.5 MB). Peak memory consumption was 110.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: 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: 39]: Loop Invariant Derived loop invariant: (0 == found || 1 == found) || (0 <= j && nc_B <= 0) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 0 == found || 1 == found - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 35 locations, 1 error locations. Result: SAFE, OverallTime: 2.8s, OverallIterations: 6, TraceHistogramMax: 3, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 167 SDtfs, 74 SDslu, 277 SDs, 0 SdLazy, 278 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 168 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred in iteration=5, 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, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 17 PreInvPairs, 31 NumberOfFragments, 65 HoareAnnotationTreeSize, 17 FomulaSimplifications, 87 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 24 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 310 NumberOfCodeBlocks, 288 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 13786 SizeOfPredicates, 12 NumberOfNonLiveVariables, 385 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 57/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...