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/Problem14_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:06:38,261 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:06:38,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:06:38,282 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:06:38,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:06:38,284 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:06:38,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:06:38,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:06:38,299 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:06:38,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:06:38,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:06:38,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:06:38,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:06:38,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:06:38,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:06:38,312 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:06:38,313 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:06:38,314 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:06:38,315 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:06:38,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:06:38,325 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:06:38,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:06:38,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:06:38,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:06:38,334 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:06:38,339 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:06:38,339 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:06:38,340 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:06:38,341 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:06:38,342 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:06:38,342 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:06:38,343 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:06:38,343 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:06:38,343 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:06:38,344 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:06:38,345 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:06:38,346 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 00:06:38,380 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:06:38,380 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:06:38,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:06:38,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:06:38,382 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:06:38,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:06:38,382 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:06:38,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:06:38,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:06:38,383 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:06:38,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:06:38,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:06:38,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:06:38,383 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:06:38,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:06:38,384 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:06:38,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:06:38,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:06:38,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:06:38,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:06:38,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:06:38,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:38,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:06:38,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:06:38,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:06:38,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:06:38,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:06:38,386 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:06:38,386 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 00:06:38,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:06:38,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:06:38,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:06:38,700 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:06:38,701 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:06:38,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label50.c [2019-10-15 00:06:38,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d62e9a4e/937ded6de16a4f32aab1ba6842e03d95/FLAG559f919c0 [2019-10-15 00:06:39,400 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:06:39,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label50.c [2019-10-15 00:06:39,423 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d62e9a4e/937ded6de16a4f32aab1ba6842e03d95/FLAG559f919c0 [2019-10-15 00:06:39,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4d62e9a4e/937ded6de16a4f32aab1ba6842e03d95 [2019-10-15 00:06:39,643 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:06:39,645 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:06:39,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:39,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:06:39,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:06:39,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:39" (1/1) ... [2019-10-15 00:06:39,655 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f417be5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:39, skipping insertion in model container [2019-10-15 00:06:39,655 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:06:39" (1/1) ... [2019-10-15 00:06:39,664 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:06:39,730 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:06:40,298 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:40,303 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:06:40,446 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:06:40,464 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:06:40,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40 WrapperNode [2019-10-15 00:06:40,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:06:40,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:06:40,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:06:40,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:06:40,476 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,498 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,499 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,572 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,580 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... [2019-10-15 00:06:40,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:06:40,600 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:06:40,600 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:06:40,601 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:06:40,601 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:06:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:06:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:06:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:06:40,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:06:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:06:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:06:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:06:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:06:40,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:06:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:06:40,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:06:42,089 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:06:42,089 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:06:42,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:42 BoogieIcfgContainer [2019-10-15 00:06:42,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:06:42,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:06:42,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:06:42,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:06:42,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:06:39" (1/3) ... [2019-10-15 00:06:42,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d95069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:42, skipping insertion in model container [2019-10-15 00:06:42,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:06:40" (2/3) ... [2019-10-15 00:06:42,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d95069 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:06:42, skipping insertion in model container [2019-10-15 00:06:42,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:06:42" (3/3) ... [2019-10-15 00:06:42,101 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label50.c [2019-10-15 00:06:42,112 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:06:42,122 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:06:42,135 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:06:42,172 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:06:42,172 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:06:42,172 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:06:42,173 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:06:42,173 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:06:42,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:06:42,173 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:06:42,173 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:06:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-15 00:06:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-15 00:06:42,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:42,216 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] [2019-10-15 00:06:42,217 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:42,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:42,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1557712066, now seen corresponding path program 1 times [2019-10-15 00:06:42,236 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:42,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910390967] [2019-10-15 00:06:42,236 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:42,237 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:42,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:42,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:42,583 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 00:06:42,585 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910390967] [2019-10-15 00:06:42,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:42,587 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:06:42,587 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744517406] [2019-10-15 00:06:42,593 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:06:42,596 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:42,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:06:42,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:06:42,619 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 3 states. [2019-10-15 00:06:43,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:43,878 INFO L93 Difference]: Finished difference Result 688 states and 1223 transitions. [2019-10-15 00:06:43,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:06:43,880 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2019-10-15 00:06:43,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:43,907 INFO L225 Difference]: With dead ends: 688 [2019-10-15 00:06:43,907 INFO L226 Difference]: Without dead ends: 372 [2019-10-15 00:06:43,919 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 00:06:43,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2019-10-15 00:06:44,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 372. [2019-10-15 00:06:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2019-10-15 00:06:44,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 602 transitions. [2019-10-15 00:06:44,024 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 602 transitions. Word has length 43 [2019-10-15 00:06:44,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:44,025 INFO L462 AbstractCegarLoop]: Abstraction has 372 states and 602 transitions. [2019-10-15 00:06:44,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:06:44,047 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 602 transitions. [2019-10-15 00:06:44,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-15 00:06:44,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:44,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:44,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1883069890, now seen corresponding path program 1 times [2019-10-15 00:06:44,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:44,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029158155] [2019-10-15 00:06:44,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:44,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:44,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:44,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:44,296 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:44,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029158155] [2019-10-15 00:06:44,298 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:44,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:06:44,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108392416] [2019-10-15 00:06:44,300 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:06:44,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:44,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:06:44,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:06:44,301 INFO L87 Difference]: Start difference. First operand 372 states and 602 transitions. Second operand 6 states. [2019-10-15 00:06:45,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:45,558 INFO L93 Difference]: Finished difference Result 936 states and 1526 transitions. [2019-10-15 00:06:45,558 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:06:45,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-10-15 00:06:45,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:45,563 INFO L225 Difference]: With dead ends: 936 [2019-10-15 00:06:45,564 INFO L226 Difference]: Without dead ends: 570 [2019-10-15 00:06:45,566 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 00:06:45,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2019-10-15 00:06:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 562. [2019-10-15 00:06:45,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 562 states. [2019-10-15 00:06:45,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 562 states to 562 states and 814 transitions. [2019-10-15 00:06:45,595 INFO L78 Accepts]: Start accepts. Automaton has 562 states and 814 transitions. Word has length 129 [2019-10-15 00:06:45,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:45,596 INFO L462 AbstractCegarLoop]: Abstraction has 562 states and 814 transitions. [2019-10-15 00:06:45,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:06:45,596 INFO L276 IsEmpty]: Start isEmpty. Operand 562 states and 814 transitions. [2019-10-15 00:06:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 00:06:45,599 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:45,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:06:45,599 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:45,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:45,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1079220531, now seen corresponding path program 1 times [2019-10-15 00:06:45,600 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:45,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625442569] [2019-10-15 00:06:45,600 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:45,601 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:45,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:45,762 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:45,762 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625442569] [2019-10-15 00:06:45,763 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:06:45,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:06:45,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209236866] [2019-10-15 00:06:45,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:06:45,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:45,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:06:45,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:45,765 INFO L87 Difference]: Start difference. First operand 562 states and 814 transitions. Second operand 4 states. [2019-10-15 00:06:47,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:47,212 INFO L93 Difference]: Finished difference Result 2220 states and 3286 transitions. [2019-10-15 00:06:47,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:06:47,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 138 [2019-10-15 00:06:47,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:47,223 INFO L225 Difference]: With dead ends: 2220 [2019-10-15 00:06:47,223 INFO L226 Difference]: Without dead ends: 1664 [2019-10-15 00:06:47,225 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:06:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2019-10-15 00:06:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1664. [2019-10-15 00:06:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1664 states. [2019-10-15 00:06:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1664 states to 1664 states and 2308 transitions. [2019-10-15 00:06:47,289 INFO L78 Accepts]: Start accepts. Automaton has 1664 states and 2308 transitions. Word has length 138 [2019-10-15 00:06:47,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:47,290 INFO L462 AbstractCegarLoop]: Abstraction has 1664 states and 2308 transitions. [2019-10-15 00:06:47,290 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:06:47,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1664 states and 2308 transitions. [2019-10-15 00:06:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2019-10-15 00:06:47,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:47,300 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-15 00:06:47,301 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:47,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:47,301 INFO L82 PathProgramCache]: Analyzing trace with hash 762391661, now seen corresponding path program 1 times [2019-10-15 00:06:47,302 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:47,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447344878] [2019-10-15 00:06:47,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:47,302 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:47,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:47,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 145 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:06:48,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447344878] [2019-10-15 00:06:48,320 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060114146] [2019-10-15 00:06:48,321 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 00:06:48,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:48,434 INFO L256 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:06:48,449 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:48,625 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:48,812 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 00:06:48,812 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:49,009 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,010 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,015 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,016 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,040 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,173 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:06:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 72 proven. 108 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:49,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:06:49,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12, 5] total 17 [2019-10-15 00:06:49,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057670418] [2019-10-15 00:06:49,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:06:49,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:06:49,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:06:49,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-15 00:06:49,488 INFO L87 Difference]: Start difference. First operand 1664 states and 2308 transitions. Second operand 5 states. [2019-10-15 00:06:50,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:06:50,955 INFO L93 Difference]: Finished difference Result 3724 states and 5204 transitions. [2019-10-15 00:06:50,955 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:06:50,955 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 274 [2019-10-15 00:06:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:06:50,968 INFO L225 Difference]: With dead ends: 3724 [2019-10-15 00:06:50,969 INFO L226 Difference]: Without dead ends: 2066 [2019-10-15 00:06:50,973 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 544 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2019-10-15 00:06:50,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2066 states. [2019-10-15 00:06:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2066 to 1862. [2019-10-15 00:06:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1862 states. [2019-10-15 00:06:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1862 states to 1862 states and 2503 transitions. [2019-10-15 00:06:51,046 INFO L78 Accepts]: Start accepts. Automaton has 1862 states and 2503 transitions. Word has length 274 [2019-10-15 00:06:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:06:51,047 INFO L462 AbstractCegarLoop]: Abstraction has 1862 states and 2503 transitions. [2019-10-15 00:06:51,047 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:06:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1862 states and 2503 transitions. [2019-10-15 00:06:51,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2019-10-15 00:06:51,055 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:06:51,055 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2019-10-15 00:06:51,262 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:06:51,262 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:06:51,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:06:51,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1515376597, now seen corresponding path program 1 times [2019-10-15 00:06:51,263 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:06:51,264 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099459637] [2019-10-15 00:06:51,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:51,264 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:06:51,264 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:06:51,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:52,033 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 194 proven. 190 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:52,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099459637] [2019-10-15 00:06:52,034 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908131155] [2019-10-15 00:06:52,034 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 00:06:52,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:06:52,149 INFO L256 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-15 00:06:52,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:06:52,227 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 298 proven. 53 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-15 00:06:52,460 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:06:52,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-15 00:06:53,027 INFO L134 CoverageAnalysis]: Checked inductivity of 388 backedges. 116 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:06:53,028 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1841651335] [2019-10-15 00:06:53,034 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 359 [2019-10-15 00:06:53,098 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:06:53,098 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:07:07,827 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:07:07,830 INFO L272 AbstractInterpreter]: Visited 128 different actions 251 times. Merged at 4 different actions 5 times. Never widened. Performed 505 root evaluator evaluations with a maximum evaluation depth of 13. Performed 505 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Found 1 fixpoints after 1 different actions. Largest state had 24 variables. [2019-10-15 00:07:07,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:07:07,834 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-15 00:07:14,183 INFO L227 lantSequenceWeakener]: Weakened 355 states. On average, predicates are now at 77.61% of their original sizes. [2019-10-15 00:07:14,183 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-15 00:07:14,275 INFO L553 sIntCurrentIteration]: We unified 357 AI predicates to 357 [2019-10-15 00:07:14,275 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-15 00:07:14,276 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-15 00:07:14,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12, 8, 8] total 29 [2019-10-15 00:07:14,277 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796818544] [2019-10-15 00:07:14,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-15 00:07:14,278 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-15 00:07:14,279 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-15 00:07:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-15 00:07:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:07:14,279 INFO L87 Difference]: Start difference. First operand 1862 states and 2503 transitions. Second operand 11 states.