/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --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-fb55353 [2019-11-07 01:04:16,064 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-07 01:04:16,067 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-07 01:04:16,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-07 01:04:16,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-07 01:04:16,087 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-07 01:04:16,088 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-07 01:04:16,090 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-07 01:04:16,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-07 01:04:16,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-07 01:04:16,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-07 01:04:16,094 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-07 01:04:16,095 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-07 01:04:16,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-07 01:04:16,097 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-07 01:04:16,098 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-07 01:04:16,099 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-07 01:04:16,099 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-07 01:04:16,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-07 01:04:16,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-07 01:04:16,105 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-07 01:04:16,106 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-07 01:04:16,107 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-07 01:04:16,108 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-07 01:04:16,110 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-07 01:04:16,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-07 01:04:16,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-07 01:04:16,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-07 01:04:16,121 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 [2019-11-07 01:04:16,135 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-07 01:04:16,135 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-07 01:04:16,136 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-07 01:04:16,136 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-07 01:04:16,137 INFO L138 SettingsManager]: * Use SBE=true [2019-11-07 01:04:16,137 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-07 01:04:16,137 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-07 01:04:16,137 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-07 01:04:16,137 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-07 01:04:16,138 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-07 01:04:16,138 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-07 01:04:16,138 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-07 01:04:16,138 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-07 01:04:16,138 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-07 01:04:16,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-07 01:04:16,139 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-07 01:04:16,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-07 01:04:16,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-07 01:04:16,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-07 01:04:16,140 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-07 01:04:16,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-07 01:04:16,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:16,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-07 01:04:16,141 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-07 01:04:16,141 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-07 01:04:16,141 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-07 01:04:16,141 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-07 01:04:16,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-07 01:04:16,142 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 [2019-11-07 01:04:16,415 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-07 01:04:16,426 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-07 01:04:16,430 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-07 01:04:16,432 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-07 01:04:16,432 INFO L275 PluginConnector]: CDTParser initialized [2019-11-07 01:04:16,433 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-07 01:04:16,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d8ba10e/68030be23df54dd69bb7797e8dae83b1/FLAG39288ad34 [2019-11-07 01:04:16,958 INFO L306 CDTParser]: Found 1 translation units. [2019-11-07 01:04:16,960 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/reducercommutativity/sep05-1.i [2019-11-07 01:04:16,966 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d8ba10e/68030be23df54dd69bb7797e8dae83b1/FLAG39288ad34 [2019-11-07 01:04:17,358 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/04d8ba10e/68030be23df54dd69bb7797e8dae83b1 [2019-11-07 01:04:17,369 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-07 01:04:17,370 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-07 01:04:17,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:17,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-07 01:04:17,375 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-07 01:04:17,376 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,379 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@155aa901 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17, skipping insertion in model container [2019-11-07 01:04:17,379 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,387 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-07 01:04:17,406 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-07 01:04:17,573 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:17,582 INFO L188 MainTranslator]: Completed pre-run [2019-11-07 01:04:17,604 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-07 01:04:17,697 INFO L192 MainTranslator]: Completed translation [2019-11-07 01:04:17,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17 WrapperNode [2019-11-07 01:04:17,698 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-07 01:04:17,699 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-07 01:04:17,699 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-07 01:04:17,699 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-07 01:04:17,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,747 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,748 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... [2019-11-07 01:04:17,752 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-07 01:04:17,752 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-07 01:04:17,753 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-07 01:04:17,753 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-07 01:04:17,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-07 01:04:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-07 01:04:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-07 01:04:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2019-11-07 01:04:17,818 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-07 01:04:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-07 01:04:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-07 01:04:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2019-11-07 01:04:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-07 01:04:17,819 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-07 01:04:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-07 01:04:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-07 01:04:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-07 01:04:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-07 01:04:17,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-07 01:04:18,089 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-07 01:04:18,089 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-07 01:04:18,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:18 BoogieIcfgContainer [2019-11-07 01:04:18,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-07 01:04:18,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-07 01:04:18,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-07 01:04:18,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-07 01:04:18,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:04:17" (1/3) ... [2019-11-07 01:04:18,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cba66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:18, skipping insertion in model container [2019-11-07 01:04:18,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:04:17" (2/3) ... [2019-11-07 01:04:18,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17cba66e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:04:18, skipping insertion in model container [2019-11-07 01:04:18,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:04:18" (3/3) ... [2019-11-07 01:04:18,099 INFO L109 eAbstractionObserver]: Analyzing ICFG sep05-1.i [2019-11-07 01:04:18,110 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-07 01:04:18,118 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-07 01:04:18,136 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-07 01:04:18,171 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-07 01:04:18,171 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-07 01:04:18,171 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-07 01:04:18,172 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-07 01:04:18,172 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-07 01:04:18,172 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-07 01:04:18,172 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-07 01:04:18,172 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-07 01:04:18,196 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-11-07 01:04:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:18,204 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:18,205 INFO L410 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] [2019-11-07 01:04:18,207 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:18,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:18,213 INFO L82 PathProgramCache]: Analyzing trace with hash 794343521, now seen corresponding path program 1 times [2019-11-07 01:04:18,225 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:18,225 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885754026] [2019-11-07 01:04:18,225 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:18,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:04:18,393 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885754026] [2019-11-07 01:04:18,394 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:18,394 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-07 01:04:18,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992470171] [2019-11-07 01:04:18,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:18,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:18,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-07 01:04:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-07 01:04:18,424 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2019-11-07 01:04:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:18,466 INFO L93 Difference]: Finished difference Result 56 states and 75 transitions. [2019-11-07 01:04:18,467 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:18,470 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-11-07 01:04:18,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:18,483 INFO L225 Difference]: With dead ends: 56 [2019-11-07 01:04:18,484 INFO L226 Difference]: Without dead ends: 27 [2019-11-07 01:04:18,498 INFO L630 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 [2019-11-07 01:04:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-07 01:04:18,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-07 01:04:18,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-07 01:04:18,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2019-11-07 01:04:18,564 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 32 [2019-11-07 01:04:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:18,566 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2019-11-07 01:04:18,566 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:18,567 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2019-11-07 01:04:18,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-07 01:04:18,572 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:18,573 INFO L410 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] [2019-11-07 01:04:18,574 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:18,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash 2140793590, now seen corresponding path program 1 times [2019-11-07 01:04:18,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:18,576 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224802217] [2019-11-07 01:04:18,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:18,717 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-07 01:04:18,718 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224802217] [2019-11-07 01:04:18,718 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:18,721 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:18,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531417437] [2019-11-07 01:04:18,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:18,724 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:18,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:18,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:18,725 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 3 states. [2019-11-07 01:04:18,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:18,770 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2019-11-07 01:04:18,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:18,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-07 01:04:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:18,772 INFO L225 Difference]: With dead ends: 48 [2019-11-07 01:04:18,772 INFO L226 Difference]: Without dead ends: 29 [2019-11-07 01:04:18,776 INFO L630 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 [2019-11-07 01:04:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-07 01:04:18,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-07 01:04:18,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-07 01:04:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-11-07 01:04:18,784 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 32 [2019-11-07 01:04:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:18,784 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-11-07 01:04:18,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:18,785 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-11-07 01:04:18,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-07 01:04:18,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:18,786 INFO L410 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] [2019-11-07 01:04:18,787 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:18,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:18,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2099349144, now seen corresponding path program 1 times [2019-11-07 01:04:18,788 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:18,788 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586427544] [2019-11-07 01:04:18,788 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:04:18,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586427544] [2019-11-07 01:04:18,883 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367338074] [2019-11-07 01:04:18,884 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 [2019-11-07 01:04:18,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:18,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-07 01:04:18,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-07 01:04:19,000 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:19,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-07 01:04:19,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-07 01:04:19,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 5 [2019-11-07 01:04:19,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081997238] [2019-11-07 01:04:19,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:19,043 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:19,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:19,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-07 01:04:19,044 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 3 states. [2019-11-07 01:04:19,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:19,059 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2019-11-07 01:04:19,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:19,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-07 01:04:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:19,061 INFO L225 Difference]: With dead ends: 49 [2019-11-07 01:04:19,062 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:19,062 INFO L630 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 [2019-11-07 01:04:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-11-07 01:04:19,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-07 01:04:19,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2019-11-07 01:04:19,069 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 34 [2019-11-07 01:04:19,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:19,070 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2019-11-07 01:04:19,070 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:19,070 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2019-11-07 01:04:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-07 01:04:19,072 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:19,072 INFO L410 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] [2019-11-07 01:04:19,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:19,278 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:19,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:19,278 INFO L82 PathProgramCache]: Analyzing trace with hash -1279819331, now seen corresponding path program 1 times [2019-11-07 01:04:19,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:19,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81020293] [2019-11-07 01:04:19,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:19,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:19,403 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:19,404 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81020293] [2019-11-07 01:04:19,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-07 01:04:19,404 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-07 01:04:19,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123863056] [2019-11-07 01:04:19,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-07 01:04:19,407 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-07 01:04:19,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-07 01:04:19,408 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 3 states. [2019-11-07 01:04:19,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:19,434 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-11-07 01:04:19,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-07 01:04:19,435 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-11-07 01:04:19,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:19,436 INFO L225 Difference]: With dead ends: 45 [2019-11-07 01:04:19,436 INFO L226 Difference]: Without dead ends: 31 [2019-11-07 01:04:19,437 INFO L630 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 [2019-11-07 01:04:19,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-07 01:04:19,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-11-07 01:04:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-07 01:04:19,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2019-11-07 01:04:19,444 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 43 [2019-11-07 01:04:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:19,446 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2019-11-07 01:04:19,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-07 01:04:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2019-11-07 01:04:19,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-07 01:04:19,448 INFO L402 BasicCegarLoop]: Found error trace [2019-11-07 01:04:19,448 INFO L410 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] [2019-11-07 01:04:19,448 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-07 01:04:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1550635457, now seen corresponding path program 1 times [2019-11-07 01:04:19,449 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-07 01:04:19,449 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786929879] [2019-11-07 01:04:19,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-07 01:04:19,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:19,555 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:19,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786929879] [2019-11-07 01:04:19,556 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808132097] [2019-11-07 01:04:19,556 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 [2019-11-07 01:04:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-07 01:04:19,656 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-07 01:04:19,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-07 01:04:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:19,685 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-07 01:04:19,721 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-07 01:04:19,722 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2084116283] [2019-11-07 01:04:19,729 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 46 [2019-11-07 01:04:19,771 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-07 01:04:19,771 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-07 01:04:19,838 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-07 01:04:19,840 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. [2019-11-07 01:04:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-07 01:04:19,844 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-11-07 01:04:19,892 INFO L227 lantSequenceWeakener]: Weakened 4 states. On average, predicates are now at 100% of their original sizes. [2019-11-07 01:04:19,893 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-11-07 01:04:19,895 INFO L553 sIntCurrentIteration]: We unified 44 AI predicates to 44 [2019-11-07 01:04:19,895 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-11-07 01:04:19,896 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-11-07 01:04:19,896 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4, 4, 4] total 7 [2019-11-07 01:04:19,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565526827] [2019-11-07 01:04:19,900 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-07 01:04:19,900 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-07 01:04:19,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-07 01:04:19,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:19,902 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 2 states. [2019-11-07 01:04:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-07 01:04:19,908 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2019-11-07 01:04:19,908 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-07 01:04:19,908 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 45 [2019-11-07 01:04:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-07 01:04:19,909 INFO L225 Difference]: With dead ends: 30 [2019-11-07 01:04:19,909 INFO L226 Difference]: Without dead ends: 0 [2019-11-07 01:04:19,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-07 01:04:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-07 01:04:19,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-07 01:04:19,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-07 01:04:19,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-07 01:04:19,912 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2019-11-07 01:04:19,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-07 01:04:19,913 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-07 01:04:19,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-07 01:04:19,913 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-07 01:04:19,913 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-07 01:04:20,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-07 01:04:20,121 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-07 01:04:20,158 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:20,158 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:20,158 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:20,158 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-07 01:04:20,158 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-11-07 01:04:20,159 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-11-07 01:04:20,159 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-07 01:04:20,159 INFO L439 ceAbstractionStarter]: At program point L33(line 33) the Hoare annotation is: false [2019-11-07 01:04:20,159 INFO L443 ceAbstractionStarter]: For program point L35-2(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:20,159 INFO L443 ceAbstractionStarter]: For program point L33-1(line 33) no Hoare annotation was computed. [2019-11-07 01:04:20,159 INFO L439 ceAbstractionStarter]: At program point L35-3(lines 35 37) the Hoare annotation is: false [2019-11-07 01:04:20,159 INFO L443 ceAbstractionStarter]: For program point L35-4(lines 35 37) no Hoare annotation was computed. [2019-11-07 01:04:20,164 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:20,164 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 18 45) no Hoare annotation was computed. [2019-11-07 01:04:20,164 INFO L443 ceAbstractionStarter]: For program point L42(line 42) no Hoare annotation was computed. [2019-11-07 01:04:20,164 INFO L443 ceAbstractionStarter]: For program point L30(line 30) no Hoare annotation was computed. [2019-11-07 01:04:20,165 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 18 45) the Hoare annotation is: true [2019-11-07 01:04:20,165 INFO L443 ceAbstractionStarter]: For program point L26-2(lines 26 28) no Hoare annotation was computed. [2019-11-07 01:04:20,165 INFO L439 ceAbstractionStarter]: At program point L26-3(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:20,165 INFO L439 ceAbstractionStarter]: At program point L26-4(lines 26 28) the Hoare annotation is: false [2019-11-07 01:04:20,165 INFO L443 ceAbstractionStarter]: For program point L41(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:20,165 INFO L439 ceAbstractionStarter]: At program point L39(line 39) the Hoare annotation is: false [2019-11-07 01:04:20,165 INFO L443 ceAbstractionStarter]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2019-11-07 01:04:20,166 INFO L443 ceAbstractionStarter]: For program point L39-1(line 39) no Hoare annotation was computed. [2019-11-07 01:04:20,169 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 42) no Hoare annotation was computed. [2019-11-07 01:04:20,169 INFO L443 ceAbstractionStarter]: For program point sepFINAL(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:20,169 INFO L446 ceAbstractionStarter]: At program point sepENTRY(lines 4 15) the Hoare annotation is: true [2019-11-07 01:04:20,169 INFO L443 ceAbstractionStarter]: For program point sepEXIT(lines 4 15) no Hoare annotation was computed. [2019-11-07 01:04:20,170 INFO L443 ceAbstractionStarter]: For program point L9(lines 9 12) no Hoare annotation was computed. [2019-11-07 01:04:20,170 INFO L443 ceAbstractionStarter]: For program point L7-2(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:20,170 INFO L446 ceAbstractionStarter]: At program point L7-3(lines 7 13) the Hoare annotation is: true [2019-11-07 01:04:20,170 INFO L443 ceAbstractionStarter]: For program point L7-4(lines 7 13) no Hoare annotation was computed. [2019-11-07 01:04:20,184 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.11 01:04:20 BoogieIcfgContainer [2019-11-07 01:04:20,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-07 01:04:20,188 INFO L168 Benchmark]: Toolchain (without parser) took 2817.07 ms. Allocated memory was 137.4 MB in the beginning and 233.3 MB in the end (delta: 95.9 MB). Free memory was 102.2 MB in the beginning and 164.9 MB in the end (delta: -62.7 MB). Peak memory consumption was 33.3 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:20,189 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 137.4 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-11-07 01:04:20,193 INFO L168 Benchmark]: CACSL2BoogieTranslator took 327.38 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.8 MB in the beginning and 181.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:20,194 INFO L168 Benchmark]: Boogie Preprocessor took 53.15 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 178.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:20,197 INFO L168 Benchmark]: RCFGBuilder took 338.49 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:20,200 INFO L168 Benchmark]: TraceAbstraction took 2092.29 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 161.6 MB in the beginning and 164.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 28.2 MB. Max. memory is 7.1 GB. [2019-11-07 01:04:20,205 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 137.4 MB. Free memory is still 120.2 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 327.38 ms. Allocated memory was 137.4 MB in the beginning and 201.9 MB in the end (delta: 64.5 MB). Free memory was 101.8 MB in the beginning and 181.7 MB in the end (delta: -79.9 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 53.15 ms. Allocated memory is still 201.9 MB. Free memory was 181.7 MB in the beginning and 178.4 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 338.49 ms. Allocated memory is still 201.9 MB. Free memory was 178.4 MB in the beginning and 161.6 MB in the end (delta: 16.8 MB). Peak memory consumption was 16.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2092.29 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 161.6 MB in the beginning and 164.9 MB in the end (delta: -3.3 MB). Peak memory consumption was 28.2 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: 2.0s, 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, 171 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 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]: 116, 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...