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/Problem12_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:02,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:02,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:02,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:02,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:02,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:02,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:02,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:02,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:02,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:02,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:02,220 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:02,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:02,221 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:02,222 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:02,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:02,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:02,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:02,227 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:02,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:02,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:02,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:02,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:02,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:02,236 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:02,239 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:05:02,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:05:02,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:05:02,241 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:05:02,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:05:02,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:05:02,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:05:02,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:05:02,244 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:02,245 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:02,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:02,246 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 00:05:02,261 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:02,261 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:02,262 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:02,262 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:02,263 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:02,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:02,263 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:02,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:02,264 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:02,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:02,265 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:02,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:02,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:02,265 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:02,266 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:02,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:02,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:02,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:02,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:02,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:02,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:02,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:02,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:02,267 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 00:05:02,565 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:02,577 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:02,580 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:02,582 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:02,582 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:02,583 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-10-15 00:05:02,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62d851ee/27c416317e2a4ba2aef5414c65b9775c/FLAG2aec3afe8 [2019-10-15 00:05:03,465 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:03,465 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-10-15 00:05:03,502 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62d851ee/27c416317e2a4ba2aef5414c65b9775c/FLAG2aec3afe8 [2019-10-15 00:05:03,536 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d62d851ee/27c416317e2a4ba2aef5414c65b9775c [2019-10-15 00:05:03,547 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:03,549 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:03,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:03,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:03,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:03,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:03" (1/1) ... [2019-10-15 00:05:03,565 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@653cba4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:03, skipping insertion in model container [2019-10-15 00:05:03,565 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:03" (1/1) ... [2019-10-15 00:05:03,574 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:03,742 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:05,443 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:05,449 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:06,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:06,237 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:06,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06 WrapperNode [2019-10-15 00:05:06,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:06,240 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:06,240 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:06,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:06,262 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,262 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,322 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,448 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (1/1) ... [2019-10-15 00:05:06,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:06,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:06,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:06,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:06,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (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 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:05:06,593 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:06,594 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:06,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:11,381 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:11,382 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:11,384 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:11 BoogieIcfgContainer [2019-10-15 00:05:11,384 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:11,387 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:11,387 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:11,390 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:11,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:03" (1/3) ... [2019-10-15 00:05:11,391 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463f9f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:11, skipping insertion in model container [2019-10-15 00:05:11,391 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:06" (2/3) ... [2019-10-15 00:05:11,392 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463f9f0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:11, skipping insertion in model container [2019-10-15 00:05:11,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:11" (3/3) ... [2019-10-15 00:05:11,408 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2019-10-15 00:05:11,423 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:11,435 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:11,447 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:11,490 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:11,491 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:11,491 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:11,491 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:11,491 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:11,491 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:11,492 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:11,492 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:11,540 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-15 00:05:11,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-15 00:05:11,548 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:11,549 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] [2019-10-15 00:05:11,552 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:11,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:11,559 INFO L82 PathProgramCache]: Analyzing trace with hash -830521731, now seen corresponding path program 1 times [2019-10-15 00:05:11,571 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:11,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731984314] [2019-10-15 00:05:11,572 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:11,573 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:11,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:11,954 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 00:05:11,958 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731984314] [2019-10-15 00:05:11,959 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:11,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:05:11,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460799659] [2019-10-15 00:05:11,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:05:11,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:11,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:05:11,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:11,985 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-15 00:05:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:17,271 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-15 00:05:17,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:05:17,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-10-15 00:05:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:17,303 INFO L225 Difference]: With dead ends: 2443 [2019-10-15 00:05:17,304 INFO L226 Difference]: Without dead ends: 1542 [2019-10-15 00:05:17,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:05:17,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-15 00:05:17,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-15 00:05:17,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-15 00:05:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2852 transitions. [2019-10-15 00:05:17,467 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2852 transitions. Word has length 24 [2019-10-15 00:05:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:17,467 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2852 transitions. [2019-10-15 00:05:17,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:05:17,468 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2852 transitions. [2019-10-15 00:05:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-15 00:05:17,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:17,473 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:05:17,473 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:17,474 INFO L82 PathProgramCache]: Analyzing trace with hash -2086118223, now seen corresponding path program 1 times [2019-10-15 00:05:17,474 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:17,474 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400026196] [2019-10-15 00:05:17,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:17,475 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:17,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:17,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:17,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400026196] [2019-10-15 00:05:17,730 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:17,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:17,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665216780] [2019-10-15 00:05:17,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:17,733 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:17,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:17,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:17,735 INFO L87 Difference]: Start difference. First operand 1542 states and 2852 transitions. Second operand 5 states. [2019-10-15 00:05:24,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:24,499 INFO L93 Difference]: Finished difference Result 4685 states and 8680 transitions. [2019-10-15 00:05:24,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:05:24,500 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2019-10-15 00:05:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:24,520 INFO L225 Difference]: With dead ends: 4685 [2019-10-15 00:05:24,520 INFO L226 Difference]: Without dead ends: 3149 [2019-10-15 00:05:24,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-10-15 00:05:24,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3117. [2019-10-15 00:05:24,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-10-15 00:05:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5119 transitions. [2019-10-15 00:05:24,660 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5119 transitions. Word has length 93 [2019-10-15 00:05:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:24,661 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 5119 transitions. [2019-10-15 00:05:24,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:24,662 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5119 transitions. [2019-10-15 00:05:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-15 00:05:24,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:24,671 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-15 00:05:24,671 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:24,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1697930939, now seen corresponding path program 1 times [2019-10-15 00:05:24,673 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:24,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345109527] [2019-10-15 00:05:24,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:24,674 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:24,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:24,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:24,873 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345109527] [2019-10-15 00:05:24,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644530322] [2019-10-15 00:05:24,874 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 00:05:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:24,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-15 00:05:24,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:05:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:05:25,059 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:05:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:05:25,219 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:05:25,219 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 11 [2019-10-15 00:05:25,228 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51809412] [2019-10-15 00:05:25,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:25,230 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:25,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:05:25,231 INFO L87 Difference]: Start difference. First operand 3117 states and 5119 transitions. Second operand 4 states. [2019-10-15 00:05:31,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:31,280 INFO L93 Difference]: Finished difference Result 9407 states and 15662 transitions. [2019-10-15 00:05:31,280 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:31,281 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-10-15 00:05:31,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:31,318 INFO L225 Difference]: With dead ends: 9407 [2019-10-15 00:05:31,319 INFO L226 Difference]: Without dead ends: 6296 [2019-10-15 00:05:31,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:05:31,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2019-10-15 00:05:31,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6296. [2019-10-15 00:05:31,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6296 states. [2019-10-15 00:05:31,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 9175 transitions. [2019-10-15 00:05:31,511 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 9175 transitions. Word has length 99 [2019-10-15 00:05:31,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:31,512 INFO L462 AbstractCegarLoop]: Abstraction has 6296 states and 9175 transitions. [2019-10-15 00:05:31,512 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:31,512 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 9175 transitions. [2019-10-15 00:05:31,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-15 00:05:31,516 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:31,516 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:05:31,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:05:31,728 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:31,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:31,729 INFO L82 PathProgramCache]: Analyzing trace with hash -2146729072, now seen corresponding path program 1 times [2019-10-15 00:05:31,730 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:31,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210543444] [2019-10-15 00:05:31,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:31,730 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:31,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:31,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:31,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:31,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210543444] [2019-10-15 00:05:31,975 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:31,975 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:05:31,975 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136756770] [2019-10-15 00:05:31,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:05:31,977 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:05:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:05:31,978 INFO L87 Difference]: Start difference. First operand 6296 states and 9175 transitions. Second operand 6 states.