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/eca-rers2012/Problem12_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:37,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:37,421 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:37,439 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:37,439 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:37,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:37,442 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:37,451 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:37,452 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:37,453 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:37,454 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:37,455 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:37,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:37,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:37,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:37,459 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:37,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:37,461 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:37,463 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:37,466 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:37,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:37,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:37,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:37,472 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:37,475 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:05:37,479 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:37,481 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:37,482 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:37,482 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:37,484 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:37,484 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:37,485 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:37,485 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:37,485 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:37,487 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:37,489 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:37,490 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 [2019-10-13 20:05:37,508 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:37,508 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:37,509 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:37,509 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:37,509 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:37,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:37,510 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:37,510 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:37,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:37,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:37,511 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:37,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:37,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:37,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:37,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:37,512 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:37,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:37,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:37,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:37,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:37,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:37,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:37,514 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:37,514 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 [2019-10-13 20:05:37,788 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:37,801 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:37,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:37,805 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:37,806 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:37,807 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-13 20:05:37,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94efef80b/4f50b0ef817149a9bb8b0c5c88eb8a81/FLAGec294986d [2019-10-13 20:05:38,558 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:38,559 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-13 20:05:38,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94efef80b/4f50b0ef817149a9bb8b0c5c88eb8a81/FLAGec294986d [2019-10-13 20:05:38,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/94efef80b/4f50b0ef817149a9bb8b0c5c88eb8a81 [2019-10-13 20:05:38,686 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:38,688 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:38,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:38,690 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:38,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:38,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:38" (1/1) ... [2019-10-13 20:05:38,698 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6912290 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:38, skipping insertion in model container [2019-10-13 20:05:38,699 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:38" (1/1) ... [2019-10-13 20:05:38,707 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:38,860 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:40,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:40,251 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:40,892 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:40,933 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:40,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40 WrapperNode [2019-10-13 20:05:40,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:40,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:40,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:40,936 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:40,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:40,954 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,014 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,134 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (1/1) ... [2019-10-13 20:05:41,214 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:41,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:41,215 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:41,215 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:41,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (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 [2019-10-13 20:05:41,281 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:05:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:05:41,282 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:05:41,283 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:41,283 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:41,284 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:41,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:41,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:41,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:46,237 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:46,238 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:46,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:46 BoogieIcfgContainer [2019-10-13 20:05:46,240 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:46,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:46,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:46,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:46,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:38" (1/3) ... [2019-10-13 20:05:46,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19622088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:46, skipping insertion in model container [2019-10-13 20:05:46,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:40" (2/3) ... [2019-10-13 20:05:46,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19622088 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:46, skipping insertion in model container [2019-10-13 20:05:46,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:46" (3/3) ... [2019-10-13 20:05:46,257 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label20.c [2019-10-13 20:05:46,267 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:46,276 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:46,287 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:46,319 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:46,320 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:46,320 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:46,320 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:46,320 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:46,320 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:46,320 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:46,321 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:46,352 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 20:05:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 20:05:46,358 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:46,359 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:46,361 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:46,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:46,367 INFO L82 PathProgramCache]: Analyzing trace with hash 326484869, now seen corresponding path program 1 times [2019-10-13 20:05:46,376 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:46,377 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129409540] [2019-10-13 20:05:46,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:46,377 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:46,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:46,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:46,607 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129409540] [2019-10-13 20:05:46,608 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:46,608 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:46,609 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335190009] [2019-10-13 20:05:46,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:46,616 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:46,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:46,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:46,633 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-13 20:05:51,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:51,562 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-13 20:05:51,564 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:51,565 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2019-10-13 20:05:51,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:51,593 INFO L225 Difference]: With dead ends: 2443 [2019-10-13 20:05:51,594 INFO L226 Difference]: Without dead ends: 1542 [2019-10-13 20:05:51,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:51,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-13 20:05:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-13 20:05:51,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-13 20:05:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-13 20:05:51,746 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 18 [2019-10-13 20:05:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:51,746 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-13 20:05:51,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-13 20:05:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 20:05:51,751 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:51,751 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:51,752 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:51,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:51,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1701778415, now seen corresponding path program 1 times [2019-10-13 20:05:51,752 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:51,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615913763] [2019-10-13 20:05:51,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:51,753 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:51,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:51,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:52,013 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615913763] [2019-10-13 20:05:52,013 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:52,014 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:05:52,014 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864863079] [2019-10-13 20:05:52,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:52,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:05:52,017 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-13 20:05:57,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:57,960 INFO L93 Difference]: Finished difference Result 3912 states and 7104 transitions. [2019-10-13 20:05:57,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:57,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2019-10-13 20:05:57,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:57,974 INFO L225 Difference]: With dead ends: 3912 [2019-10-13 20:05:57,975 INFO L226 Difference]: Without dead ends: 2376 [2019-10-13 20:05:57,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-13 20:05:57,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-13 20:05:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-13 20:05:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-13 20:05:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-13 20:05:58,042 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 91 [2019-10-13 20:05:58,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:58,042 INFO L462 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-13 20:05:58,043 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:58,043 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-13 20:05:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 20:05:58,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:58,045 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:58,045 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 2024884205, now seen corresponding path program 1 times [2019-10-13 20:05:58,047 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:58,047 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677111497] [2019-10-13 20:05:58,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,047 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,047 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:58,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:58,225 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:05:58,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677111497] [2019-10-13 20:05:58,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815512284] [2019-10-13 20:05:58,226 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 [2019-10-13 20:05:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:58,310 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 20:05:58,321 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:05:58,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:05:58,400 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:05:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 20:05:58,478 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:05:58,479 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 7 [2019-10-13 20:05:58,479 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12731364] [2019-10-13 20:05:58,479 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:58,480 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:58,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:58,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:05:58,481 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-13 20:06:03,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:03,742 INFO L93 Difference]: Finished difference Result 7080 states and 12087 transitions. [2019-10-13 20:06:03,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:03,749 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2019-10-13 20:06:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:03,774 INFO L225 Difference]: With dead ends: 7080 [2019-10-13 20:06:03,775 INFO L226 Difference]: Without dead ends: 4736 [2019-10-13 20:06:03,780 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 20:06:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4736 states. [2019-10-13 20:06:03,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4736 to 4736. [2019-10-13 20:06:03,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4736 states. [2019-10-13 20:06:03,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4736 states to 4736 states and 7803 transitions. [2019-10-13 20:06:03,901 INFO L78 Accepts]: Start accepts. Automaton has 4736 states and 7803 transitions. Word has length 93 [2019-10-13 20:06:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:03,902 INFO L462 AbstractCegarLoop]: Abstraction has 4736 states and 7803 transitions. [2019-10-13 20:06:03,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 4736 states and 7803 transitions. [2019-10-13 20:06:03,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-13 20:06:03,907 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:03,907 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:04,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:04,117 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:04,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:04,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1171285559, now seen corresponding path program 1 times [2019-10-13 20:06:04,118 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:04,118 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270298406] [2019-10-13 20:06:04,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:04,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:04,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:04,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270298406] [2019-10-13 20:06:04,359 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763108710] [2019-10-13 20:06:04,359 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 [2019-10-13 20:06:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:04,444 INFO L256 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:06:04,450 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:04,595 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 20:06:04,595 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 22 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:04,736 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:04,736 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 20:06:04,737 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459413274] [2019-10-13 20:06:04,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:04,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:04,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:04,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:06:04,741 INFO L87 Difference]: Start difference. First operand 4736 states and 7803 transitions. Second operand 5 states. [2019-10-13 20:06:11,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:11,237 INFO L93 Difference]: Finished difference Result 12030 states and 19990 transitions. [2019-10-13 20:06:11,238 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 20:06:11,238 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 182 [2019-10-13 20:06:11,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:11,272 INFO L225 Difference]: With dead ends: 12030 [2019-10-13 20:06:11,272 INFO L226 Difference]: Without dead ends: 7300 [2019-10-13 20:06:11,284 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 20:06:11,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7300 states. [2019-10-13 20:06:11,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7300 to 7158. [2019-10-13 20:06:11,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7158 states. [2019-10-13 20:06:11,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7158 states to 7158 states and 10991 transitions. [2019-10-13 20:06:11,493 INFO L78 Accepts]: Start accepts. Automaton has 7158 states and 10991 transitions. Word has length 182 [2019-10-13 20:06:11,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:11,495 INFO L462 AbstractCegarLoop]: Abstraction has 7158 states and 10991 transitions. [2019-10-13 20:06:11,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:06:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 7158 states and 10991 transitions. [2019-10-13 20:06:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-10-13 20:06:11,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:11,503 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:11,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:11,715 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash 916550728, now seen corresponding path program 1 times [2019-10-13 20:06:11,716 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:11,716 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823594228] [2019-10-13 20:06:11,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:11,717 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:11,717 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:11,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823594228] [2019-10-13 20:06:11,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288702802] [2019-10-13 20:06:11,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:12,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:12,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:06:12,082 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 20:06:12,154 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:12,271 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 22 proven. 77 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:12,272 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:12,272 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-10-13 20:06:12,272 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875734323] [2019-10-13 20:06:12,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:12,274 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:12,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:12,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:06:12,275 INFO L87 Difference]: Start difference. First operand 7158 states and 10991 transitions. Second operand 5 states.