/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/eca-rers2012/Problem12_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:49:00,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:00,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:00,499 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:00,499 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:00,500 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:00,501 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:00,505 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:00,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:00,517 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:00,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:00,520 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:00,520 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:00,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:00,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:00,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:00,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:00,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:00,530 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:00,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:00,535 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:00,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:00,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:00,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:00,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:49:00,543 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:49:00,543 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:49:00,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:49:00,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:49:00,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:49:00,548 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:49:00,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:49:00,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:49:00,551 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:49:00,555 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:49:00,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:49:00,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:49:00,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:49:00,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:00,559 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:00,560 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:00,561 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 [2019-11-06 22:49:00,574 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:00,574 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:00,575 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:00,576 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:00,576 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:00,576 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:00,576 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:00,576 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:00,577 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:00,577 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:00,577 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:00,577 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:00,577 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:00,578 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:00,578 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:00,578 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:00,578 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:00,578 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:00,579 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:00,579 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:00,579 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:00,579 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:00,579 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:00,580 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:00,580 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:00,580 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:00,580 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:00,580 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:00,580 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 [2019-11-06 22:49:00,893 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:00,912 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:00,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:00,919 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:00,919 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:00,920 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-11-06 22:49:00,997 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a713e95a/36a0cfc5254a45b7ba9b4d431bf3121f/FLAG4e43f79b7 [2019-11-06 22:49:01,741 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:01,742 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-11-06 22:49:01,774 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a713e95a/36a0cfc5254a45b7ba9b4d431bf3121f/FLAG4e43f79b7 [2019-11-06 22:49:01,838 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4a713e95a/36a0cfc5254a45b7ba9b4d431bf3121f [2019-11-06 22:49:01,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:01,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:01,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:01,854 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:01,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:01,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:01" (1/1) ... [2019-11-06 22:49:01,863 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d24be69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:01, skipping insertion in model container [2019-11-06 22:49:01,863 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:01" (1/1) ... [2019-11-06 22:49:01,871 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:02,027 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:03,585 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:03,600 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:04,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:04,258 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:04,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04 WrapperNode [2019-11-06 22:49:04,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:04,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:04,261 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:04,261 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:04,274 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,274 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,329 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,515 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (1/1) ... [2019-11-06 22:49:04,544 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:04,545 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:04,545 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:04,545 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:04,546 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (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 [2019-11-06 22:49:04,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:04,621 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:04,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:04,622 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:04,623 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:04,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:09,550 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:09,551 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:09,558 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:09 BoogieIcfgContainer [2019-11-06 22:49:09,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:09,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:09,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:09,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:09,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:01" (1/3) ... [2019-11-06 22:49:09,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46767670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:09, skipping insertion in model container [2019-11-06 22:49:09,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:04" (2/3) ... [2019-11-06 22:49:09,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46767670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:09, skipping insertion in model container [2019-11-06 22:49:09,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:09" (3/3) ... [2019-11-06 22:49:09,575 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2019-11-06 22:49:09,585 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:09,596 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:09,608 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:09,655 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:09,655 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:09,655 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:09,656 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:09,656 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:09,656 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:09,656 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:09,656 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:09,703 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:09,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:49:09,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:09,715 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-11-06 22:49:09,717 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:09,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:09,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1837034062, now seen corresponding path program 1 times [2019-11-06 22:49:09,729 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:09,730 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668895691] [2019-11-06 22:49:09,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:10,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:10,093 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668895691] [2019-11-06 22:49:10,094 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:10,095 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:10,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643237601] [2019-11-06 22:49:10,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:10,106 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:10,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:10,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:10,126 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-11-06 22:49:19,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:19,096 INFO L93 Difference]: Finished difference Result 3230 states and 6251 transitions. [2019-11-06 22:49:19,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:49:19,098 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2019-11-06 22:49:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:19,162 INFO L225 Difference]: With dead ends: 3230 [2019-11-06 22:49:19,162 INFO L226 Difference]: Without dead ends: 2309 [2019-11-06 22:49:19,177 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:19,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-11-06 22:49:19,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-11-06 22:49:19,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-11-06 22:49:19,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3821 transitions. [2019-11-06 22:49:19,369 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3821 transitions. Word has length 55 [2019-11-06 22:49:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:19,372 INFO L462 AbstractCegarLoop]: Abstraction has 2309 states and 3821 transitions. [2019-11-06 22:49:19,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:49:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3821 transitions. [2019-11-06 22:49:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:49:19,392 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:19,394 INFO L410 BasicCegarLoop]: trace histogram [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, 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] [2019-11-06 22:49:19,394 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:19,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:19,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1114761445, now seen corresponding path program 1 times [2019-11-06 22:49:19,395 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:19,395 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999849200] [2019-11-06 22:49:19,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:19,822 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999849200] [2019-11-06 22:49:19,822 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:19,823 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:49:19,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120991540] [2019-11-06 22:49:19,832 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:49:19,832 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:19,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:49:19,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:49:19,833 INFO L87 Difference]: Start difference. First operand 2309 states and 3821 transitions. Second operand 6 states. [2019-11-06 22:49:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:26,181 INFO L93 Difference]: Finished difference Result 7045 states and 11809 transitions. [2019-11-06 22:49:26,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:49:26,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 154 [2019-11-06 22:49:26,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:26,216 INFO L225 Difference]: With dead ends: 7045 [2019-11-06 22:49:26,216 INFO L226 Difference]: Without dead ends: 4742 [2019-11-06 22:49:26,223 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:49:26,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4742 states. [2019-11-06 22:49:26,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4742 to 4697. [2019-11-06 22:49:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4697 states. [2019-11-06 22:49:26,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4697 states to 4697 states and 7461 transitions. [2019-11-06 22:49:26,363 INFO L78 Accepts]: Start accepts. Automaton has 4697 states and 7461 transitions. Word has length 154 [2019-11-06 22:49:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:26,366 INFO L462 AbstractCegarLoop]: Abstraction has 4697 states and 7461 transitions. [2019-11-06 22:49:26,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:49:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4697 states and 7461 transitions. [2019-11-06 22:49:26,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-11-06 22:49:26,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:26,373 INFO L410 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:26,374 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:26,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:26,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1950696993, now seen corresponding path program 1 times [2019-11-06 22:49:26,375 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:26,376 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312368168] [2019-11-06 22:49:26,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:26,677 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:26,677 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312368168] [2019-11-06 22:49:26,678 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:26,678 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:49:26,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812656901] [2019-11-06 22:49:26,679 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:26,679 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:26,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:26,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:26,680 INFO L87 Difference]: Start difference. First operand 4697 states and 7461 transitions. Second operand 4 states. [2019-11-06 22:49:34,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:34,257 INFO L93 Difference]: Finished difference Result 18736 states and 30951 transitions. [2019-11-06 22:49:34,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:49:34,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 204 [2019-11-06 22:49:34,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:34,335 INFO L225 Difference]: With dead ends: 18736 [2019-11-06 22:49:34,337 INFO L226 Difference]: Without dead ends: 14045 [2019-11-06 22:49:34,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:49:34,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14045 states. [2019-11-06 22:49:34,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14045 to 14045. [2019-11-06 22:49:34,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14045 states. [2019-11-06 22:49:34,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14045 states to 14045 states and 22285 transitions. [2019-11-06 22:49:34,750 INFO L78 Accepts]: Start accepts. Automaton has 14045 states and 22285 transitions. Word has length 204 [2019-11-06 22:49:34,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:34,754 INFO L462 AbstractCegarLoop]: Abstraction has 14045 states and 22285 transitions. [2019-11-06 22:49:34,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:49:34,754 INFO L276 IsEmpty]: Start isEmpty. Operand 14045 states and 22285 transitions. [2019-11-06 22:49:34,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-06 22:49:34,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:34,760 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:49:34,760 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash -972211546, now seen corresponding path program 1 times [2019-11-06 22:49:34,761 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:34,761 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85159180] [2019-11-06 22:49:34,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:49:34,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85159180] [2019-11-06 22:49:34,922 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009654246] [2019-11-06 22:49:34,923 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 [2019-11-06 22:49:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:35,019 INFO L256 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:49:35,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 22:49:35,177 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 96 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:49:35,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:49:35,308 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 10 [2019-11-06 22:49:35,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347485719] [2019-11-06 22:49:35,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:35,309 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:49:35,310 INFO L87 Difference]: Start difference. First operand 14045 states and 22285 transitions. Second operand 5 states.