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/Problem10_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:26,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:26,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:26,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:26,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:26,136 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:26,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:26,146 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:26,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:26,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:26,156 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:26,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:26,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:26,160 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:26,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:26,163 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:26,165 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:26,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:26,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:26,172 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:26,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:26,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:26,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:26,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:26,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:26,191 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:26,192 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:26,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:26,194 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 00:02:26,207 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:26,207 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:26,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:26,209 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:26,209 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:26,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:26,209 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:26,210 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:26,211 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:26,211 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:26,211 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:26,211 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:26,211 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:26,212 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:26,212 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:26,212 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:26,212 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:26,212 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:26,213 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:26,213 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:26,213 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:26,213 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:26,213 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:26,214 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 00:02:26,507 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:26,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:26,533 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:26,535 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:26,535 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:26,536 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-15 00:02:26,606 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814bb0ecc/83c2ca77a6a149a281ec62c218b847ed/FLAGc6b9f9a50 [2019-10-15 00:02:27,158 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:27,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label59.c [2019-10-15 00:02:27,184 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814bb0ecc/83c2ca77a6a149a281ec62c218b847ed/FLAGc6b9f9a50 [2019-10-15 00:02:27,456 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814bb0ecc/83c2ca77a6a149a281ec62c218b847ed [2019-10-15 00:02:27,466 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:27,467 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:27,469 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:27,469 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:27,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:27,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:27" (1/1) ... [2019-10-15 00:02:27,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b57f279 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:27, skipping insertion in model container [2019-10-15 00:02:27,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:27" (1/1) ... [2019-10-15 00:02:27,483 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:27,545 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:28,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:28,060 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:28,169 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:28,189 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:28,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28 WrapperNode [2019-10-15 00:02:28,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:28,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:28,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:28,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:28,203 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,204 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,230 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,231 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,276 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,299 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,310 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:28,310 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:28,310 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:28,311 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:28,311 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (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 00:02:28,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:28,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:28,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:28,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:29,580 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:29,580 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:29,581 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:29 BoogieIcfgContainer [2019-10-15 00:02:29,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:29,583 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:29,583 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:29,586 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:29,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:27" (1/3) ... [2019-10-15 00:02:29,587 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444fed9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:29, skipping insertion in model container [2019-10-15 00:02:29,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28" (2/3) ... [2019-10-15 00:02:29,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@444fed9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:29, skipping insertion in model container [2019-10-15 00:02:29,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:29" (3/3) ... [2019-10-15 00:02:29,590 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label59.c [2019-10-15 00:02:29,599 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:29,607 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:29,618 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:29,647 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:29,648 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:29,648 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:29,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:29,648 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:29,648 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:29,649 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:29,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:02:29,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:02:29,683 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:29,684 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:29,685 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:29,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:29,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1400340266, now seen corresponding path program 1 times [2019-10-15 00:02:29,700 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:29,701 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520873135] [2019-10-15 00:02:29,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,701 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:29,702 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:30,039 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 00:02:30,040 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520873135] [2019-10-15 00:02:30,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:30,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:30,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899104877] [2019-10-15 00:02:30,046 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:30,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:30,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:30,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:30,065 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:02:31,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:31,540 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:02:31,541 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:31,543 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2019-10-15 00:02:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:31,562 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:02:31,562 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:02:31,569 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 [2019-10-15 00:02:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:02:31,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-15 00:02:31,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:02:31,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:02:31,638 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 71 [2019-10-15 00:02:31,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:31,639 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:02:31,639 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:31,639 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:02:31,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:02:31,646 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:31,647 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:31,647 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:31,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:31,648 INFO L82 PathProgramCache]: Analyzing trace with hash 41629170, now seen corresponding path program 1 times [2019-10-15 00:02:31,648 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:31,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619715602] [2019-10-15 00:02:31,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,648 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:31,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 57 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:31,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619715602] [2019-10-15 00:02:31,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317451139] [2019-10-15 00:02:31,994 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 00:02:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:32,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:32,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:32,161 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:32,230 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:02:32,230 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-10-15 00:02:32,231 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075170437] [2019-10-15 00:02:32,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:32,239 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:32,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:32,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:32,239 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-15 00:02:33,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:33,321 INFO L93 Difference]: Finished difference Result 1154 states and 1795 transitions. [2019-10-15 00:02:33,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:33,322 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 141 [2019-10-15 00:02:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:33,330 INFO L225 Difference]: With dead ends: 1154 [2019-10-15 00:02:33,331 INFO L226 Difference]: Without dead ends: 866 [2019-10-15 00:02:33,333 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:02:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-15 00:02:33,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2019-10-15 00:02:33,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 866 states. [2019-10-15 00:02:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1235 transitions. [2019-10-15 00:02:33,388 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1235 transitions. Word has length 141 [2019-10-15 00:02:33,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:33,389 INFO L462 AbstractCegarLoop]: Abstraction has 866 states and 1235 transitions. [2019-10-15 00:02:33,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:33,389 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1235 transitions. [2019-10-15 00:02:33,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-15 00:02:33,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:33,396 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, 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] [2019-10-15 00:02:33,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:33,608 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:33,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:33,609 INFO L82 PathProgramCache]: Analyzing trace with hash -395920931, now seen corresponding path program 1 times [2019-10-15 00:02:33,609 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:33,609 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132502526] [2019-10-15 00:02:33,610 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,611 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:33,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:33,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132502526] [2019-10-15 00:02:33,825 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:33,826 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:33,826 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878572420] [2019-10-15 00:02:33,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:33,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:33,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:33,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:33,836 INFO L87 Difference]: Start difference. First operand 866 states and 1235 transitions. Second operand 6 states. [2019-10-15 00:02:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:34,737 INFO L93 Difference]: Finished difference Result 1766 states and 2578 transitions. [2019-10-15 00:02:34,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:34,738 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-15 00:02:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:34,745 INFO L225 Difference]: With dead ends: 1766 [2019-10-15 00:02:34,746 INFO L226 Difference]: Without dead ends: 906 [2019-10-15 00:02:34,748 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 00:02:34,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2019-10-15 00:02:34,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 886. [2019-10-15 00:02:34,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-15 00:02:34,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1211 transitions. [2019-10-15 00:02:34,782 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1211 transitions. Word has length 152 [2019-10-15 00:02:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:34,783 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1211 transitions. [2019-10-15 00:02:34,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:34,783 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1211 transitions. [2019-10-15 00:02:34,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-15 00:02:34,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:34,789 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, 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] [2019-10-15 00:02:34,789 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:34,790 INFO L82 PathProgramCache]: Analyzing trace with hash 421403873, now seen corresponding path program 1 times [2019-10-15 00:02:34,790 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:34,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628723076] [2019-10-15 00:02:34,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,790 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:34,982 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628723076] [2019-10-15 00:02:34,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:34,983 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:34,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017547266] [2019-10-15 00:02:34,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:34,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:34,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:34,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:34,985 INFO L87 Difference]: Start difference. First operand 886 states and 1211 transitions. Second operand 6 states. [2019-10-15 00:02:35,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:35,813 INFO L93 Difference]: Finished difference Result 2394 states and 3478 transitions. [2019-10-15 00:02:35,813 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:35,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 202 [2019-10-15 00:02:35,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:35,824 INFO L225 Difference]: With dead ends: 2394 [2019-10-15 00:02:35,824 INFO L226 Difference]: Without dead ends: 1514 [2019-10-15 00:02:35,826 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 00:02:35,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2019-10-15 00:02:35,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1482. [2019-10-15 00:02:35,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1482 states. [2019-10-15 00:02:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1482 states to 1482 states and 2029 transitions. [2019-10-15 00:02:35,879 INFO L78 Accepts]: Start accepts. Automaton has 1482 states and 2029 transitions. Word has length 202 [2019-10-15 00:02:35,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:35,880 INFO L462 AbstractCegarLoop]: Abstraction has 1482 states and 2029 transitions. [2019-10-15 00:02:35,880 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:35,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1482 states and 2029 transitions. [2019-10-15 00:02:35,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2019-10-15 00:02:35,887 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:35,887 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:02:35,888 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:35,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:35,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1534813554, now seen corresponding path program 1 times [2019-10-15 00:02:35,889 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:35,889 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910226731] [2019-10-15 00:02:35,889 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,890 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:35,890 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:35,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:36,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910226731] [2019-10-15 00:02:36,071 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628831865] [2019-10-15 00:02:36,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:36,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:36,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:36,186 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-15 00:02:36,310 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 128 proven. 65 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:36,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:36,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:02:36,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937641584] [2019-10-15 00:02:36,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:36,437 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:36,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:36,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:02:36,437 INFO L87 Difference]: Start difference. First operand 1482 states and 2029 transitions. Second operand 5 states. [2019-10-15 00:02:37,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:37,375 INFO L93 Difference]: Finished difference Result 4019 states and 5739 transitions. [2019-10-15 00:02:37,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:02:37,376 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 221 [2019-10-15 00:02:37,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:37,393 INFO L225 Difference]: With dead ends: 4019 [2019-10-15 00:02:37,393 INFO L226 Difference]: Without dead ends: 2543 [2019-10-15 00:02:37,399 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 438 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:02:37,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2543 states. [2019-10-15 00:02:37,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2543 to 2509. [2019-10-15 00:02:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2509 states. [2019-10-15 00:02:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2509 states to 2509 states and 3402 transitions. [2019-10-15 00:02:37,535 INFO L78 Accepts]: Start accepts. Automaton has 2509 states and 3402 transitions. Word has length 221 [2019-10-15 00:02:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:37,536 INFO L462 AbstractCegarLoop]: Abstraction has 2509 states and 3402 transitions. [2019-10-15 00:02:37,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 2509 states and 3402 transitions. [2019-10-15 00:02:37,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-15 00:02:37,541 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:37,542 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-15 00:02:37,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:37,746 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:37,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:37,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1716693714, now seen corresponding path program 1 times [2019-10-15 00:02:37,748 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:37,748 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883670007] [2019-10-15 00:02:37,748 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:37,749 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:37,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:37,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 9 proven. 125 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-15 00:02:37,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883670007] [2019-10-15 00:02:37,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340594049] [2019-10-15 00:02:37,965 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:38,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:38,045 INFO L256 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:02:38,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:38,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:38,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,081 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,085 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,091 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,093 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,095 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,096 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,101 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,103 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:38,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,398 WARN L191 SmtUtils]: Spent 11.23 s on a formula simplification. DAG size of input: 79 DAG size of output: 42 [2019-10-15 00:02:49,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:49,730 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:49,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,912 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:49,917 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:02:49,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:49,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:02:50,038 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 131 proven. 67 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:50,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [813105394] [2019-10-15 00:02:50,045 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 228 [2019-10-15 00:02:50,100 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:50,100 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:02:54,183 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.