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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:22:25,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:22:25,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:22:25,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:22:25,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:22:25,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:22:25,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:22:25,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:22:25,054 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:22:25,058 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:22:25,059 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:22:25,061 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:22:25,061 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:22:25,063 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:22:25,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:22:25,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:22:25,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:22:25,070 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:22:25,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:22:25,076 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:22:25,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:22:25,083 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:22:25,086 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:22:25,086 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:22:25,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 01:22:25,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:22:25,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:22:25,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:22:25,102 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 [2019-10-15 01:22:25,135 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:22:25,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:22:25,139 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:22:25,139 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:22:25,142 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:22:25,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:22:25,143 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:22:25,143 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:22:25,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:22:25,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:22:25,144 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:22:25,144 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:22:25,144 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:22:25,146 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:22:25,146 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:22:25,147 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:22:25,147 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:22:25,147 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:22:25,147 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:22:25,148 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:22:25,148 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:22:25,148 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:22:25,148 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:22:25,148 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:22:25,149 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:22:25,149 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:22:25,150 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:22:25,150 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:22:25,150 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 01:22:25,484 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:22:25,500 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:22:25,504 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:22:25,505 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:22:25,505 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:22:25,506 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-10-15 01:22:25,568 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958d90909/1c3cd291bc3d4c15bb9d5e5d054bd229/FLAG0bb56a306 [2019-10-15 01:22:26,015 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:22:26,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-10-15 01:22:26,021 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958d90909/1c3cd291bc3d4c15bb9d5e5d054bd229/FLAG0bb56a306 [2019-10-15 01:22:26,419 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/958d90909/1c3cd291bc3d4c15bb9d5e5d054bd229 [2019-10-15 01:22:26,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:22:26,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:22:26,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:26,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:22:26,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:22:26,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2a3789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26, skipping insertion in model container [2019-10-15 01:22:26,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,448 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:22:26,466 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:22:26,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:26,706 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:22:26,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:22:26,878 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:22:26,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26 WrapperNode [2019-10-15 01:22:26,878 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:22:26,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:22:26,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:22:26,880 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:22:26,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,912 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (1/1) ... [2019-10-15 01:22:26,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:22:26,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:22:26,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:22:26,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:22:26,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (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 [2019-10-15 01:22:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:22:26,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:22:26,995 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-10-15 01:22:26,995 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:22:26,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:22:26,995 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 01:22:26,995 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-10-15 01:22:26,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:22:26,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:22:27,281 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:22:27,281 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-15 01:22:27,283 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:27 BoogieIcfgContainer [2019-10-15 01:22:27,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:22:27,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:22:27,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:22:27,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:22:27,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:22:26" (1/3) ... [2019-10-15 01:22:27,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:27, skipping insertion in model container [2019-10-15 01:22:27,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:22:26" (2/3) ... [2019-10-15 01:22:27,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@359b2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:22:27, skipping insertion in model container [2019-10-15 01:22:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:22:27" (3/3) ... [2019-10-15 01:22:27,306 INFO L109 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2019-10-15 01:22:27,326 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:22:27,334 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:22:27,356 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:22:27,387 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:22:27,388 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:22:27,388 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:22:27,388 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:22:27,388 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:22:27,388 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:22:27,388 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:22:27,389 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:22:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-15 01:22:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:27,411 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:27,412 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:27,414 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:27,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:27,420 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-10-15 01:22:27,430 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:27,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604660124] [2019-10-15 01:22:27,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,431 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,431 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:27,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:27,577 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:27,578 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604660124] [2019-10-15 01:22:27,579 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:27,580 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-15 01:22:27,580 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706940621] [2019-10-15 01:22:27,585 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:27,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:27,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:27,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:27,603 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-10-15 01:22:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:27,625 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-10-15 01:22:27,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:27,627 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-10-15 01:22:27,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:27,634 INFO L225 Difference]: With dead ends: 56 [2019-10-15 01:22:27,635 INFO L226 Difference]: Without dead ends: 27 [2019-10-15 01:22:27,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:27,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-15 01:22:27,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-15 01:22:27,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-15 01:22:27,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-10-15 01:22:27,678 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-10-15 01:22:27,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:27,678 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-10-15 01:22:27,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:27,678 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-10-15 01:22:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-15 01:22:27,681 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:27,681 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:27,682 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:27,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-10-15 01:22:27,683 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:27,683 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245236961] [2019-10-15 01:22:27,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,683 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,683 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-15 01:22:27,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245236961] [2019-10-15 01:22:27,776 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:27,776 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:27,777 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72529292] [2019-10-15 01:22:27,780 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:27,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:27,781 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-10-15 01:22:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:27,838 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-10-15 01:22:27,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:27,841 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-15 01:22:27,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:27,843 INFO L225 Difference]: With dead ends: 48 [2019-10-15 01:22:27,844 INFO L226 Difference]: Without dead ends: 29 [2019-10-15 01:22:27,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:27,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-15 01:22:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-15 01:22:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-15 01:22:27,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-15 01:22:27,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-10-15 01:22:27,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:27,863 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-15 01:22:27,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:27,864 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-15 01:22:27,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-15 01:22:27,866 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:27,867 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:27,869 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-10-15 01:22:27,871 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:27,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203113773] [2019-10-15 01:22:27,872 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:27,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:27,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203113773] [2019-10-15 01:22:27,983 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199678138] [2019-10-15 01:22:27,983 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 [2019-10-15 01:22:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,099 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-15 01:22:28,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-15 01:22:28,144 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:22:28,186 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:22:28,186 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-10-15 01:22:28,186 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10234515] [2019-10-15 01:22:28,187 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:28,187 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:28,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:28,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:28,188 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-10-15 01:22:28,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:28,206 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-10-15 01:22:28,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:28,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-15 01:22:28,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:28,208 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:22:28,209 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:22:28,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-15 01:22:28,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:22:28,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-10-15 01:22:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-15 01:22:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-10-15 01:22:28,216 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-10-15 01:22:28,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,217 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-10-15 01:22:28,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-10-15 01:22:28,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 01:22:28,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,219 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:28,425 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-10-15 01:22:28,427 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212778566] [2019-10-15 01:22:28,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,428 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:28,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,549 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:28,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212778566] [2019-10-15 01:22:28,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:22:28,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 01:22:28,551 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156023239] [2019-10-15 01:22:28,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 01:22:28,552 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:28,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 01:22:28,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:28,553 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-10-15 01:22:28,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:28,568 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-15 01:22:28,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 01:22:28,569 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 01:22:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:28,571 INFO L225 Difference]: With dead ends: 45 [2019-10-15 01:22:28,571 INFO L226 Difference]: Without dead ends: 31 [2019-10-15 01:22:28,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 01:22:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-15 01:22:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-10-15 01:22:28,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-15 01:22:28,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-10-15 01:22:28,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-10-15 01:22:28,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:28,585 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-10-15 01:22:28,585 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 01:22:28,587 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-10-15 01:22:28,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-15 01:22:28,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:22:28,591 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:22:28,592 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:22:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,592 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-10-15 01:22:28,592 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 01:22:28,593 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773911819] [2019-10-15 01:22:28,593 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,598 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:22:28,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:22:28,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:28,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773911819] [2019-10-15 01:22:28,747 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804139071] [2019-10-15 01:22:28,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-15 01:22:28,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:22:28,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:22:28,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:22:28,828 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:28,828 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:22:28,862 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-15 01:22:28,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [901133712] [2019-10-15 01:22:28,869 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 46 [2019-10-15 01:22:28,906 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 01:22:28,906 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 01:22:28,965 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 01:22:28,966 INFO L272 AbstractInterpreter]: Visited 6 different actions 6 times. Never merged. Never widened. Performed 15 root evaluator evaluations with a maximum evaluation depth of 0. Performed 15 inverse root evaluator evaluations with a maximum inverse evaluation depth of 0. Never found a fixpoint. Largest state had 30 variables. [2019-10-15 01:22:28,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:22:28,970 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 01:22:29,014 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-10-15 01:22:29,014 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 01:22:29,016 INFO L553 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2019-10-15 01:22:29,017 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 01:22:29,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:22:29,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-10-15 01:22:29,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19180991] [2019-10-15 01:22:29,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-15 01:22:29,019 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 01:22:29,019 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 01:22:29,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-15 01:22:29,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:29,020 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-10-15 01:22:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:22:29,022 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-10-15 01:22:29,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-15 01:22:29,023 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2019-10-15 01:22:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:22:29,024 INFO L225 Difference]: With dead ends: 30 [2019-10-15 01:22:29,024 INFO L226 Difference]: Without dead ends: 0 [2019-10-15 01:22:29,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-15 01:22:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-15 01:22:29,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-15 01:22:29,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-15 01:22:29,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-15 01:22:29,026 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-10-15 01:22:29,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:22:29,028 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-15 01:22:29,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-15 01:22:29,028 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-15 01:22:29,028 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-15 01:22:29,231 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:22:29,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-15 01:22:29,281 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,281 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,281 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,281 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,281 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,281 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-15 01:22:29,282 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-15 01:22:29,282 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false [2019-10-15 01:22:29,282 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2019-10-15 01:22:29,282 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2019-10-15 01:22:29,282 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false [2019-10-15 01:22:29,282 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2019-10-15 01:22:29,283 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-10-15 01:22:29,283 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-10-15 01:22:29,284 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false [2019-10-15 01:22:29,284 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2019-10-15 01:22:29,284 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false [2019-10-15 01:22:29,284 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2019-10-15 01:22:29,284 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-10-15 01:22:29,284 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2019-10-15 01:22:29,284 INFO L443 ceAbstractionStarter]: For program point sepFINAL(lines 4 15) no Hoare annotation was computed. [2019-10-15 01:22:29,285 INFO L446 ceAbstractionStarter]: At program point sepENTRY(lines 4 15) the Hoare annotation is: true [2019-10-15 01:22:29,285 INFO L443 ceAbstractionStarter]: For program point sepEXIT(lines 4 15) no Hoare annotation was computed. [2019-10-15 01:22:29,285 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-10-15 01:22:29,285 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 7 13) no Hoare annotation was computed. [2019-10-15 01:22:29,285 INFO L446 ceAbstractionStarter]: At program point L7-3(lines 7 13) the Hoare annotation is: true [2019-10-15 01:22:29,285 INFO L443 ceAbstractionStarter]: For program point L7-4(lines 7 13) no Hoare annotation was computed. [2019-10-15 01:22:29,300 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.10 01:22:29 BoogieIcfgContainer [2019-10-15 01:22:29,300 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-15 01:22:29,305 INFO L168 Benchmark]: Toolchain (without parser) took 2871.50 ms. Allocated memory was 138.9 MB in the beginning and 233.8 MB in the end (delta: 94.9 MB). Free memory was 103.9 MB in the beginning and 163.1 MB in the end (delta: -59.2 MB). Peak memory consumption was 35.7 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,307 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,312 INFO L168 Benchmark]: CACSL2BoogieTranslator took 446.88 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 103.5 MB in the beginning and 183.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,314 INFO L168 Benchmark]: Boogie Preprocessor took 61.53 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,316 INFO L168 Benchmark]: RCFGBuilder took 342.61 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 165.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,318 INFO L168 Benchmark]: TraceAbstraction took 2006.32 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 164.6 MB in the beginning and 163.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. [2019-10-15 01:22:29,324 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 138.9 MB. Free memory was 122.2 MB in the beginning and 121.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 446.88 ms. Allocated memory was 138.9 MB in the beginning and 204.5 MB in the end (delta: 65.5 MB). Free memory was 103.5 MB in the beginning and 183.7 MB in the end (delta: -80.2 MB). Peak memory consumption was 24.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 61.53 ms. Allocated memory is still 204.5 MB. Free memory was 183.7 MB in the beginning and 181.3 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 342.61 ms. Allocated memory is still 204.5 MB. Free memory was 181.3 MB in the beginning and 165.2 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2006.32 ms. Allocated memory was 204.5 MB in the beginning and 233.8 MB in the end (delta: 29.4 MB). Free memory was 164.6 MB in the beginning and 163.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 30.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 42]: 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: 26]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 7]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 32 locations, 1 error locations. Result: SAFE, OverallTime: 1.9s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 5 SDslu, 84 SDs, 0 SdLazy, 15 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 122 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 33 PreInvPairs, 33 NumberOfFragments, 11 HoareAnnotationTreeSize, 33 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 265 NumberOfCodeBlocks, 265 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 335 ConstructedInterpolants, 0 QuantifiedInterpolants, 13897 SizeOfPredicates, 2 NumberOfNonLiveVariables, 285 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 9 InterpolantComputations, 4 PerfectInterpolantSequences, 198/217 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 101, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9602272727272727, AVG_VARS_REMOVED_DURING_WEAKENING: 1.2272727272727273, AVG_WEAKENED_CONJUNCTS: 0.13636363636363635, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...