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/Problem11_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:04:32,525 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:04:32,528 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:04:32,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:04:32,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:04:32,541 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:04:32,543 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:04:32,545 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:04:32,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:04:32,547 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:04:32,548 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:04:32,550 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:04:32,550 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:04:32,551 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:04:32,552 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:04:32,553 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:04:32,554 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:04:32,555 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:04:32,557 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:04:32,559 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:04:32,561 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:04:32,562 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:04:32,563 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:04:32,564 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:04:32,566 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:04:32,567 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:04:32,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:04:32,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:04:32,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:04:32,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:04:32,570 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:04:32,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:04:32,574 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:04:32,575 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:04:32,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:04:32,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:04:32,579 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:04:32,579 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:04:32,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:04:32,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:04:32,584 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:04:32,586 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 20:04:32,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:04:32,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:04:32,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:04:32,615 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:04:32,615 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:04:32,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:04:32,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:04:32,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:04:32,616 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:04:32,616 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:04:32,617 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:04:32,617 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:04:32,617 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:04:32,618 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:04:32,618 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:04:32,618 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:04:32,618 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:04:32,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:04:32,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:04:32,619 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:04:32,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:04:32,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:04:32,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:04:32,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:04:32,620 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:04:32,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:04:32,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:04:32,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:04:32,621 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 20:04:32,937 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:04:32,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:04:32,965 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:04:32,967 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:04:32,967 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:04:32,968 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-13 20:04:33,038 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8517956/6abe916ee89e4493987f8ed8c7d9d394/FLAGf627d4db8 [2019-10-13 20:04:33,692 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:04:33,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-13 20:04:33,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8517956/6abe916ee89e4493987f8ed8c7d9d394/FLAGf627d4db8 [2019-10-13 20:04:33,900 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d8517956/6abe916ee89e4493987f8ed8c7d9d394 [2019-10-13 20:04:33,911 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:04:33,913 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:04:33,915 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:33,915 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:04:33,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:04:33,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:33" (1/1) ... [2019-10-13 20:04:33,922 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7639f8e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:33, skipping insertion in model container [2019-10-13 20:04:33,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:04:33" (1/1) ... [2019-10-13 20:04:33,931 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:04:34,011 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:04:34,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:34,701 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:04:35,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:04:35,084 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:04:35,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35 WrapperNode [2019-10-13 20:04:35,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:04:35,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:04:35,088 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:04:35,088 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:04:35,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,253 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,301 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (1/1) ... [2019-10-13 20:04:35,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:04:35,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:04:35,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:04:35,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:04:35,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (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 20:04:35,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:04:35,395 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:04:35,395 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:04:35,395 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:04:35,395 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:04:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:04:35,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:04:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:04:35,397 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:04:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:04:35,398 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:04:37,318 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:04:37,319 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:04:37,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:37 BoogieIcfgContainer [2019-10-13 20:04:37,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:04:37,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:04:37,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:04:37,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:04:37,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:04:33" (1/3) ... [2019-10-13 20:04:37,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ead436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:37, skipping insertion in model container [2019-10-13 20:04:37,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:04:35" (2/3) ... [2019-10-13 20:04:37,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ead436 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:04:37, skipping insertion in model container [2019-10-13 20:04:37,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:04:37" (3/3) ... [2019-10-13 20:04:37,340 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label30.c [2019-10-13 20:04:37,352 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:04:37,363 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:04:37,374 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:04:37,403 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:04:37,404 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:04:37,404 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:04:37,404 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:04:37,426 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:04:37,426 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:04:37,426 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:04:37,426 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:04:37,458 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 20:04:37,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 20:04:37,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:37,467 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:04:37,470 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:37,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:37,476 INFO L82 PathProgramCache]: Analyzing trace with hash 506629546, now seen corresponding path program 1 times [2019-10-13 20:04:37,486 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:37,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310650838] [2019-10-13 20:04:37,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:37,486 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:37,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:37,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:37,797 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 20:04:37,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310650838] [2019-10-13 20:04:37,799 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:37,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:37,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854683927] [2019-10-13 20:04:37,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:37,807 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:37,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:37,828 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-13 20:04:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:40,232 INFO L93 Difference]: Finished difference Result 997 states and 1776 transitions. [2019-10-13 20:04:40,234 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:40,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2019-10-13 20:04:40,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:40,259 INFO L225 Difference]: With dead ends: 997 [2019-10-13 20:04:40,260 INFO L226 Difference]: Without dead ends: 623 [2019-10-13 20:04:40,268 INFO L600 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 [2019-10-13 20:04:40,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2019-10-13 20:04:40,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 620. [2019-10-13 20:04:40,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-13 20:04:40,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 896 transitions. [2019-10-13 20:04:40,374 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 896 transitions. Word has length 35 [2019-10-13 20:04:40,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:40,375 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 896 transitions. [2019-10-13 20:04:40,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:40,375 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 896 transitions. [2019-10-13 20:04:40,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-13 20:04:40,385 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:40,386 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:40,386 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:40,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:40,387 INFO L82 PathProgramCache]: Analyzing trace with hash -295507094, now seen corresponding path program 1 times [2019-10-13 20:04:40,387 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:40,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592917054] [2019-10-13 20:04:40,387 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:40,388 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:40,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:40,644 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:40,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592917054] [2019-10-13 20:04:40,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:40,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:40,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985751385] [2019-10-13 20:04:40,647 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:40,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:40,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:40,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:40,648 INFO L87 Difference]: Start difference. First operand 620 states and 896 transitions. Second operand 6 states. [2019-10-13 20:04:42,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:42,348 INFO L93 Difference]: Finished difference Result 1833 states and 2715 transitions. [2019-10-13 20:04:42,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:04:42,350 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 107 [2019-10-13 20:04:42,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:42,362 INFO L225 Difference]: With dead ends: 1833 [2019-10-13 20:04:42,363 INFO L226 Difference]: Without dead ends: 1219 [2019-10-13 20:04:42,366 INFO L600 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 [2019-10-13 20:04:42,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2019-10-13 20:04:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1200. [2019-10-13 20:04:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1200 states. [2019-10-13 20:04:42,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 1735 transitions. [2019-10-13 20:04:42,446 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 1735 transitions. Word has length 107 [2019-10-13 20:04:42,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:42,446 INFO L462 AbstractCegarLoop]: Abstraction has 1200 states and 1735 transitions. [2019-10-13 20:04:42,446 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 1735 transitions. [2019-10-13 20:04:42,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-13 20:04:42,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:42,451 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:42,452 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:42,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:42,452 INFO L82 PathProgramCache]: Analyzing trace with hash 388493337, now seen corresponding path program 1 times [2019-10-13 20:04:42,453 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:42,453 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550152222] [2019-10-13 20:04:42,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:42,453 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:42,453 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:42,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:42,562 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550152222] [2019-10-13 20:04:42,562 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:42,562 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:04:42,562 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955449757] [2019-10-13 20:04:42,563 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:04:42,563 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:04:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:04:42,564 INFO L87 Difference]: Start difference. First operand 1200 states and 1735 transitions. Second operand 4 states. [2019-10-13 20:04:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:44,409 INFO L93 Difference]: Finished difference Result 3552 states and 5208 transitions. [2019-10-13 20:04:44,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:04:44,410 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 108 [2019-10-13 20:04:44,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:44,424 INFO L225 Difference]: With dead ends: 3552 [2019-10-13 20:04:44,424 INFO L226 Difference]: Without dead ends: 2358 [2019-10-13 20:04:44,428 INFO L600 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 [2019-10-13 20:04:44,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2019-10-13 20:04:44,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2153. [2019-10-13 20:04:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2153 states. [2019-10-13 20:04:44,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 3070 transitions. [2019-10-13 20:04:44,510 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 3070 transitions. Word has length 108 [2019-10-13 20:04:44,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:44,510 INFO L462 AbstractCegarLoop]: Abstraction has 2153 states and 3070 transitions. [2019-10-13 20:04:44,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:04:44,511 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 3070 transitions. [2019-10-13 20:04:44,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-13 20:04:44,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:44,517 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:04:44,517 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:44,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:44,518 INFO L82 PathProgramCache]: Analyzing trace with hash 204212222, now seen corresponding path program 1 times [2019-10-13 20:04:44,518 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:44,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994747112] [2019-10-13 20:04:44,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:44,519 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:44,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:44,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994747112] [2019-10-13 20:04:44,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:04:44,689 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:04:44,689 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004229962] [2019-10-13 20:04:44,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:04:44,690 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:04:44,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:04:44,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:04:44,691 INFO L87 Difference]: Start difference. First operand 2153 states and 3070 transitions. Second operand 6 states. [2019-10-13 20:04:47,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:04:47,485 INFO L93 Difference]: Finished difference Result 8027 states and 14009 transitions. [2019-10-13 20:04:47,486 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 20:04:47,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 133 [2019-10-13 20:04:47,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:04:47,548 INFO L225 Difference]: With dead ends: 8027 [2019-10-13 20:04:47,549 INFO L226 Difference]: Without dead ends: 5880 [2019-10-13 20:04:47,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-13 20:04:47,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2019-10-13 20:04:47,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 5142. [2019-10-13 20:04:47,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5142 states. [2019-10-13 20:04:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 7403 transitions. [2019-10-13 20:04:47,859 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 7403 transitions. Word has length 133 [2019-10-13 20:04:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:04:47,859 INFO L462 AbstractCegarLoop]: Abstraction has 5142 states and 7403 transitions. [2019-10-13 20:04:47,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:04:47,860 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 7403 transitions. [2019-10-13 20:04:47,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-13 20:04:47,864 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:04:47,865 INFO L380 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, 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] [2019-10-13 20:04:47,865 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:04:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:04:47,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1527930193, now seen corresponding path program 1 times [2019-10-13 20:04:47,866 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:04:47,866 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16239746] [2019-10-13 20:04:47,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:47,866 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:04:47,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:04:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:48,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16239746] [2019-10-13 20:04:48,057 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582012025] [2019-10-13 20:04:48,057 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 20:04:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:04:48,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 20:04:48,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:04:48,252 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:48,252 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:04:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:04:48,443 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [437764748] [2019-10-13 20:04:48,460 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 181 [2019-10-13 20:04:48,532 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:04:48,533 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)