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/Problem18_label37.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:10:15,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:10:15,547 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:10:15,566 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:10:15,567 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:10:15,568 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:10:15,569 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:10:15,571 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:10:15,573 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:10:15,574 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:10:15,575 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:10:15,576 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:10:15,577 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:10:15,578 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:10:15,579 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:10:15,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:10:15,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:10:15,582 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:10:15,584 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:10:15,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:10:15,588 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:10:15,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:10:15,590 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:10:15,591 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:10:15,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:10:15,607 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:10:15,608 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:10:15,609 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:10:15,612 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:10:15,636 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:10:15,636 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:10:15,638 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:10:15,638 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:10:15,638 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:10:15,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:10:15,638 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:10:15,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:10:15,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:10:15,639 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:10:15,639 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:10:15,639 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:10:15,640 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:10:15,640 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:10:15,640 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:10:15,640 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:10:15,640 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:10:15,641 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:10:15,641 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:10:15,641 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:10:15,641 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:10:15,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:15,642 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:10:15,642 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:10:15,642 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:10:15,642 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:10:15,642 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:10:15,643 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:10:15,643 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:10:15,941 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:10:15,962 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:10:15,966 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:10:15,968 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:10:15,968 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:10:15,969 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-10-15 00:10:16,043 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee053bce1/a396f4988c194d87ac316b5894fdfc52/FLAGb1f7c14ce [2019-10-15 00:10:16,781 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:10:16,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label37.c [2019-10-15 00:10:16,817 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee053bce1/a396f4988c194d87ac316b5894fdfc52/FLAGb1f7c14ce [2019-10-15 00:10:16,898 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee053bce1/a396f4988c194d87ac316b5894fdfc52 [2019-10-15 00:10:16,909 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:10:16,911 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:10:16,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:16,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:10:16,916 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:10:16,917 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:16" (1/1) ... [2019-10-15 00:10:16,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d678107 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:16, skipping insertion in model container [2019-10-15 00:10:16,922 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:10:16" (1/1) ... [2019-10-15 00:10:16,930 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:10:17,046 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:10:18,360 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:18,377 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:10:18,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:10:18,917 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:10:18,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18 WrapperNode [2019-10-15 00:10:18,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:10:18,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:10:18,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:10:18,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:10:18,933 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:18,934 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:18,995 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:18,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:19,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:19,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:19,155 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... [2019-10-15 00:10:19,183 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:10:19,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:10:19,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:10:19,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:10:19,188 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:10:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:10:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:10:19,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:10:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:10:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:10:19,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:10:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:10:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:10:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:10:19,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:10:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:10:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:10:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:10:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:10:19,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:10:23,200 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:10:23,205 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:10:23,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:23 BoogieIcfgContainer [2019-10-15 00:10:23,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:10:23,212 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:10:23,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:10:23,216 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:10:23,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:10:16" (1/3) ... [2019-10-15 00:10:23,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdfa778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:23, skipping insertion in model container [2019-10-15 00:10:23,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:10:18" (2/3) ... [2019-10-15 00:10:23,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdfa778 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:10:23, skipping insertion in model container [2019-10-15 00:10:23,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:10:23" (3/3) ... [2019-10-15 00:10:23,230 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label37.c [2019-10-15 00:10:23,245 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:10:23,258 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:10:23,270 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:10:23,315 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:10:23,316 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:10:23,316 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:10:23,316 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:10:23,316 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:10:23,316 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:10:23,316 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:10:23,317 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:10:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-15 00:10:23,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-15 00:10:23,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:23,379 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:23,380 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash -545503303, now seen corresponding path program 1 times [2019-10-15 00:10:23,395 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:23,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392606155] [2019-10-15 00:10:23,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,396 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:23,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:23,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:23,782 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392606155] [2019-10-15 00:10:23,783 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:23,783 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:10:23,783 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660149547] [2019-10-15 00:10:23,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:10:23,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:10:23,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:10:23,808 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-10-15 00:10:28,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:28,104 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-10-15 00:10:28,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:10:28,106 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-10-15 00:10:28,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:28,146 INFO L225 Difference]: With dead ends: 2248 [2019-10-15 00:10:28,146 INFO L226 Difference]: Without dead ends: 1412 [2019-10-15 00:10:28,157 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 [2019-10-15 00:10:28,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-10-15 00:10:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-10-15 00:10:28,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-10-15 00:10:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-10-15 00:10:28,310 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 62 [2019-10-15 00:10:28,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:28,311 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-10-15 00:10:28,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:10:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-10-15 00:10:28,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-15 00:10:28,318 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:28,319 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, 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] [2019-10-15 00:10:28,319 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:28,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1269044687, now seen corresponding path program 1 times [2019-10-15 00:10:28,320 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:28,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358368413] [2019-10-15 00:10:28,320 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:28,321 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:28,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:28,479 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:28,480 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358368413] [2019-10-15 00:10:28,480 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:28,480 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:10:28,481 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886316282] [2019-10-15 00:10:28,482 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:28,483 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:28,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:28,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:10:28,484 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 5 states. [2019-10-15 00:10:33,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:33,806 INFO L93 Difference]: Finished difference Result 3572 states and 6416 transitions. [2019-10-15 00:10:33,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:33,807 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 133 [2019-10-15 00:10:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:33,824 INFO L225 Difference]: With dead ends: 3572 [2019-10-15 00:10:33,825 INFO L226 Difference]: Without dead ends: 2166 [2019-10-15 00:10:33,829 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:10:33,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2166 states. [2019-10-15 00:10:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2166 to 2146. [2019-10-15 00:10:33,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2146 states. [2019-10-15 00:10:33,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2146 states to 2146 states and 3628 transitions. [2019-10-15 00:10:33,901 INFO L78 Accepts]: Start accepts. Automaton has 2146 states and 3628 transitions. Word has length 133 [2019-10-15 00:10:33,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:33,904 INFO L462 AbstractCegarLoop]: Abstraction has 2146 states and 3628 transitions. [2019-10-15 00:10:33,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:10:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 2146 states and 3628 transitions. [2019-10-15 00:10:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2019-10-15 00:10:33,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:33,915 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, 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] [2019-10-15 00:10:33,916 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:33,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:33,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1629453244, now seen corresponding path program 1 times [2019-10-15 00:10:33,918 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:33,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351784632] [2019-10-15 00:10:33,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:33,918 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:33,918 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:34,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351784632] [2019-10-15 00:10:34,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:34,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:34,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446401927] [2019-10-15 00:10:34,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:34,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:34,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:34,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:34,149 INFO L87 Difference]: Start difference. First operand 2146 states and 3628 transitions. Second operand 6 states. [2019-10-15 00:10:39,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:39,271 INFO L93 Difference]: Finished difference Result 5051 states and 8506 transitions. [2019-10-15 00:10:39,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:39,275 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 156 [2019-10-15 00:10:39,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:39,292 INFO L225 Difference]: With dead ends: 5051 [2019-10-15 00:10:39,293 INFO L226 Difference]: Without dead ends: 2911 [2019-10-15 00:10:39,299 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 [2019-10-15 00:10:39,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2911 states. [2019-10-15 00:10:39,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2911 to 2887. [2019-10-15 00:10:39,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2887 states. [2019-10-15 00:10:39,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2887 states to 2887 states and 4487 transitions. [2019-10-15 00:10:39,471 INFO L78 Accepts]: Start accepts. Automaton has 2887 states and 4487 transitions. Word has length 156 [2019-10-15 00:10:39,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:39,474 INFO L462 AbstractCegarLoop]: Abstraction has 2887 states and 4487 transitions. [2019-10-15 00:10:39,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:39,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2887 states and 4487 transitions. [2019-10-15 00:10:39,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-10-15 00:10:39,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:39,477 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, 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] [2019-10-15 00:10:39,477 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:39,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:39,477 INFO L82 PathProgramCache]: Analyzing trace with hash 242415228, now seen corresponding path program 1 times [2019-10-15 00:10:39,478 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:39,478 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220581253] [2019-10-15 00:10:39,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:39,478 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:39,478 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:39,728 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:39,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220581253] [2019-10-15 00:10:39,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:39,729 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:39,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392815442] [2019-10-15 00:10:39,730 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:39,731 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:39,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:39,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:39,731 INFO L87 Difference]: Start difference. First operand 2887 states and 4487 transitions. Second operand 6 states. [2019-10-15 00:10:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:44,655 INFO L93 Difference]: Finished difference Result 6543 states and 10148 transitions. [2019-10-15 00:10:44,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:44,656 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-10-15 00:10:44,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:44,673 INFO L225 Difference]: With dead ends: 6543 [2019-10-15 00:10:44,674 INFO L226 Difference]: Without dead ends: 3662 [2019-10-15 00:10:44,681 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 [2019-10-15 00:10:44,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3662 states. [2019-10-15 00:10:44,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3662 to 3642. [2019-10-15 00:10:44,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3642 states. [2019-10-15 00:10:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 5124 transitions. [2019-10-15 00:10:44,771 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 5124 transitions. Word has length 160 [2019-10-15 00:10:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:44,771 INFO L462 AbstractCegarLoop]: Abstraction has 3642 states and 5124 transitions. [2019-10-15 00:10:44,772 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 5124 transitions. [2019-10-15 00:10:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-15 00:10:44,775 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:44,775 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, 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] [2019-10-15 00:10:44,775 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:44,776 INFO L82 PathProgramCache]: Analyzing trace with hash -4380259, now seen corresponding path program 1 times [2019-10-15 00:10:44,776 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:44,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367919845] [2019-10-15 00:10:44,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,777 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:44,777 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:10:44,947 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367919845] [2019-10-15 00:10:44,947 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:10:44,947 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:10:44,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366212824] [2019-10-15 00:10:44,948 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:10:44,948 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:44,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:10:44,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:10:44,948 INFO L87 Difference]: Start difference. First operand 3642 states and 5124 transitions. Second operand 6 states. [2019-10-15 00:10:50,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:10:50,106 INFO L93 Difference]: Finished difference Result 10404 states and 14982 transitions. [2019-10-15 00:10:50,109 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:10:50,110 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2019-10-15 00:10:50,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:10:50,144 INFO L225 Difference]: With dead ends: 10404 [2019-10-15 00:10:50,144 INFO L226 Difference]: Without dead ends: 6768 [2019-10-15 00:10:50,155 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:50,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6768 states. [2019-10-15 00:10:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6768 to 6670. [2019-10-15 00:10:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6670 states. [2019-10-15 00:10:50,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6670 states to 6670 states and 9031 transitions. [2019-10-15 00:10:50,451 INFO L78 Accepts]: Start accepts. Automaton has 6670 states and 9031 transitions. Word has length 191 [2019-10-15 00:10:50,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:10:50,453 INFO L462 AbstractCegarLoop]: Abstraction has 6670 states and 9031 transitions. [2019-10-15 00:10:50,453 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:10:50,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6670 states and 9031 transitions. [2019-10-15 00:10:50,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-15 00:10:50,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:10:50,460 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:10:50,460 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:10:50,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:10:50,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1134912638, now seen corresponding path program 1 times [2019-10-15 00:10:50,461 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:10:50,462 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540174907] [2019-10-15 00:10:50,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:50,462 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:10:50,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:10:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:50,653 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:50,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540174907] [2019-10-15 00:10:50,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874455445] [2019-10-15 00:10:50,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:10:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:10:50,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:10:50,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:10:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-10-15 00:10:50,932 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:10:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 110 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:10:51,070 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:10:51,071 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 9 [2019-10-15 00:10:51,071 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921044077] [2019-10-15 00:10:51,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:10:51,072 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:10:51,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:10:51,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:10:51,073 INFO L87 Difference]: Start difference. First operand 6670 states and 9031 transitions. Second operand 5 states.