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/Problem01_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:54:42,202 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:54:42,204 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:54:42,222 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:54:42,222 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:54:42,223 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:54:42,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:54:42,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:54:42,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:54:42,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:54:42,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:54:42,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:54:42,231 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:54:42,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:54:42,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:54:42,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:54:42,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:54:42,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:54:42,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:54:42,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:54:42,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:54:42,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:54:42,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:54:42,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:54:42,262 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:54:42,267 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:54:42,268 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:54:42,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:54:42,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:54:42,277 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:54:42,277 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:54:42,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:54:42,278 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:54:42,278 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:54:42,279 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:54:42,281 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:54:42,283 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 [2019-10-14 23:54:42,305 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:54:42,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:54:42,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:54:42,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:54:42,307 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:54:42,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:54:42,308 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:54:42,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:54:42,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:54:42,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:54:42,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:54:42,310 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:54:42,310 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:54:42,310 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:54:42,310 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:54:42,311 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:54:42,311 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:54:42,311 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:54:42,311 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:54:42,311 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:54:42,312 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:54:42,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:54:42,312 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:54:42,312 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:54:42,313 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:54:42,313 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:54:42,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:54:42,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:54:42,313 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 [2019-10-14 23:54:42,588 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:54:42,602 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:54:42,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:54:42,609 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:54:42,609 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:54:42,610 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-10-14 23:54:42,676 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e239bda33/9d7764cb03764b02924f041d5883a265/FLAG11cef06d5 [2019-10-14 23:54:43,192 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:54:43,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label44.c [2019-10-14 23:54:43,207 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e239bda33/9d7764cb03764b02924f041d5883a265/FLAG11cef06d5 [2019-10-14 23:54:43,488 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e239bda33/9d7764cb03764b02924f041d5883a265 [2019-10-14 23:54:43,497 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:54:43,499 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:54:43,500 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:43,500 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:54:43,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:54:43,503 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:43" (1/1) ... [2019-10-14 23:54:43,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76f51de0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:43, skipping insertion in model container [2019-10-14 23:54:43,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:54:43" (1/1) ... [2019-10-14 23:54:43,512 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:54:43,564 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:54:44,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:44,063 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:54:44,174 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:54:44,189 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:54:44,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44 WrapperNode [2019-10-14 23:54:44,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:54:44,190 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:54:44,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:54:44,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:54:44,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,218 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,284 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (1/1) ... [2019-10-14 23:54:44,295 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:54:44,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:54:44,296 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:54:44,296 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:54:44,297 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (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 [2019-10-14 23:54:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:54:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:54:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:54:44,361 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:54:44,361 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:54:44,362 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:54:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:54:44,363 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:54:45,484 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:54:45,484 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:54:45,486 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:45 BoogieIcfgContainer [2019-10-14 23:54:45,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:54:45,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:54:45,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:54:45,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:54:45,490 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:54:43" (1/3) ... [2019-10-14 23:54:45,491 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:45, skipping insertion in model container [2019-10-14 23:54:45,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:54:44" (2/3) ... [2019-10-14 23:54:45,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bc51b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:54:45, skipping insertion in model container [2019-10-14 23:54:45,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:54:45" (3/3) ... [2019-10-14 23:54:45,494 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label44.c [2019-10-14 23:54:45,504 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:54:45,512 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:54:45,523 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:54:45,550 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:54:45,550 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:54:45,550 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:54:45,551 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:54:45,551 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:54:45,551 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:54:45,551 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:54:45,551 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:54:45,575 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 23:54:45,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 23:54:45,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:45,585 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:45,586 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:45,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:45,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1855725642, now seen corresponding path program 1 times [2019-10-14 23:54:45,599 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:45,599 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:54:45,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:45,599 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:45,600 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:45,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:46,052 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838802245] [2019-10-14 23:54:46,053 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:46,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:46,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966664248] [2019-10-14 23:54:46,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:46,060 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:46,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:46,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:46,079 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-10-14 23:54:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:46,946 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-10-14 23:54:46,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:46,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-10-14 23:54:46,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:46,974 INFO L225 Difference]: With dead ends: 547 [2019-10-14 23:54:46,974 INFO L226 Difference]: Without dead ends: 278 [2019-10-14 23:54:46,986 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 3 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-10-14 23:54:47,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-10-14 23:54:47,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-10-14 23:54:47,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 394 transitions. [2019-10-14 23:54:47,057 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 394 transitions. Word has length 90 [2019-10-14 23:54:47,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:47,058 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 394 transitions. [2019-10-14 23:54:47,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:47,058 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 394 transitions. [2019-10-14 23:54:47,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 23:54:47,063 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:47,063 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:47,064 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1996722829, now seen corresponding path program 1 times [2019-10-14 23:54:47,065 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:47,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972680312] [2019-10-14 23:54:47,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:47,065 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:47,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:47,176 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:47,177 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972680312] [2019-10-14 23:54:47,177 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:47,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:54:47,178 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764223808] [2019-10-14 23:54:47,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:54:47,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:47,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:54:47,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:54:47,180 INFO L87 Difference]: Start difference. First operand 278 states and 394 transitions. Second operand 6 states. [2019-10-14 23:54:47,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:47,995 INFO L93 Difference]: Finished difference Result 840 states and 1222 transitions. [2019-10-14 23:54:47,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:54:47,997 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 100 [2019-10-14 23:54:47,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:48,004 INFO L225 Difference]: With dead ends: 840 [2019-10-14 23:54:48,004 INFO L226 Difference]: Without dead ends: 568 [2019-10-14 23:54:48,006 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:54:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-10-14 23:54:48,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 556. [2019-10-14 23:54:48,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 556 states. [2019-10-14 23:54:48,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 785 transitions. [2019-10-14 23:54:48,060 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 785 transitions. Word has length 100 [2019-10-14 23:54:48,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:48,060 INFO L462 AbstractCegarLoop]: Abstraction has 556 states and 785 transitions. [2019-10-14 23:54:48,061 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:54:48,061 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 785 transitions. [2019-10-14 23:54:48,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 23:54:48,064 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:48,064 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:48,065 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:48,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:48,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2111365455, now seen corresponding path program 1 times [2019-10-14 23:54:48,065 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:48,066 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850072786] [2019-10-14 23:54:48,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,066 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:48,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:48,167 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:48,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850072786] [2019-10-14 23:54:48,168 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:54:48,168 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:54:48,168 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390567234] [2019-10-14 23:54:48,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:54:48,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:54:48,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:54:48,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:48,171 INFO L87 Difference]: Start difference. First operand 556 states and 785 transitions. Second operand 3 states. [2019-10-14 23:54:48,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:54:48,766 INFO L93 Difference]: Finished difference Result 1513 states and 2162 transitions. [2019-10-14 23:54:48,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:54:48,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 101 [2019-10-14 23:54:48,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:54:48,780 INFO L225 Difference]: With dead ends: 1513 [2019-10-14 23:54:48,780 INFO L226 Difference]: Without dead ends: 963 [2019-10-14 23:54:48,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:54:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2019-10-14 23:54:48,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2019-10-14 23:54:48,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2019-10-14 23:54:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1279 transitions. [2019-10-14 23:54:48,864 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1279 transitions. Word has length 101 [2019-10-14 23:54:48,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:54:48,865 INFO L462 AbstractCegarLoop]: Abstraction has 961 states and 1279 transitions. [2019-10-14 23:54:48,865 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:54:48,865 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1279 transitions. [2019-10-14 23:54:48,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 23:54:48,871 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:54:48,872 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:54:48,872 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:54:48,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:54:48,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1472223214, now seen corresponding path program 1 times [2019-10-14 23:54:48,873 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:54:48,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552259414] [2019-10-14 23:54:48,873 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,874 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:54:48,874 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:54:48,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:49,007 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:49,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552259414] [2019-10-14 23:54:49,008 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965004058] [2019-10-14 23:54:49,008 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 [2019-10-14 23:54:49,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:54:49,135 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:54:49,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:54:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:49,219 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:54:49,356 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 45 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:54:49,357 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2128269061] [2019-10-14 23:54:49,381 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 133 [2019-10-14 23:54:49,437 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:54:49,437 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)