/usr/bin/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-fb55353 [2019-11-06 22:49:35,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:49:35,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:49:35,212 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:49:35,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:49:35,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:49:35,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:49:35,221 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:49:35,229 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:49:35,230 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:49:35,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:49:35,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:49:35,235 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:49:35,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:49:35,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:49:35,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:49:35,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:49:35,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:49:35,247 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:49:35,248 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:49:35,250 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:49:35,251 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:49:35,252 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:49:35,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:49:35,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:49:35,255 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:49:35,255 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:49:35,256 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:49:35,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:49:35,257 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:49:35,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:49:35,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:49:35,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:49:35,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:49:35,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:49:35,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:49:35,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:49:35,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:49:35,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:49:35,263 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:49:35,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:49:35,264 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 [2019-11-06 22:49:35,284 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:49:35,285 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:49:35,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:49:35,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:49:35,286 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:49:35,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:49:35,287 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:49:35,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:49:35,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:49:35,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:49:35,288 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:49:35,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:49:35,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:49:35,288 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:49:35,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:49:35,289 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:49:35,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:49:35,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:49:35,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:49:35,292 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:49:35,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:49:35,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:49:35,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:49:35,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:49:35,295 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:49:35,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:49:35,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:49:35,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:49:35,296 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 [2019-11-06 22:49:35,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:49:35,626 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:49:35,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:49:35,631 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:49:35,632 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:49:35,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-06 22:49:35,709 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/904d0a3eb/f82b5e62fce54b78801ac2e882ead724/FLAGd49f1854f [2019-11-06 22:49:36,455 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:49:36,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label50.c [2019-11-06 22:49:36,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/904d0a3eb/f82b5e62fce54b78801ac2e882ead724/FLAGd49f1854f [2019-11-06 22:49:36,563 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/904d0a3eb/f82b5e62fce54b78801ac2e882ead724 [2019-11-06 22:49:36,575 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:49:36,577 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:49:36,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:36,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:49:36,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:49:36,586 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:36" (1/1) ... [2019-11-06 22:49:36,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72ed38c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:36, skipping insertion in model container [2019-11-06 22:49:36,590 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:49:36" (1/1) ... [2019-11-06 22:49:36,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:49:36,756 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:49:38,447 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:38,457 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:49:39,017 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:49:39,046 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:49:39,047 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39 WrapperNode [2019-11-06 22:49:39,047 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:49:39,048 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:49:39,048 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:49:39,048 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:49:39,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,138 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,261 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,331 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (1/1) ... [2019-11-06 22:49:39,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:49:39,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:49:39,359 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:49:39,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:49:39,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (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 [2019-11-06 22:49:39,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:49:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:49:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:49:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:49:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:49:39,430 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 22:49:39,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:49:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:49:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:49:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:49:39,431 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:49:39,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:49:44,186 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:49:44,186 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:49:44,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:44 BoogieIcfgContainer [2019-11-06 22:49:44,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:49:44,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:49:44,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:49:44,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:49:44,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:49:36" (1/3) ... [2019-11-06 22:49:44,195 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87d2b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:44, skipping insertion in model container [2019-11-06 22:49:44,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:49:39" (2/3) ... [2019-11-06 22:49:44,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@87d2b8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:49:44, skipping insertion in model container [2019-11-06 22:49:44,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:49:44" (3/3) ... [2019-11-06 22:49:44,198 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label50.c [2019-11-06 22:49:44,208 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:49:44,217 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:49:44,231 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:49:44,266 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:49:44,266 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:49:44,267 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:49:44,267 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:49:44,267 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:49:44,267 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:49:44,267 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:49:44,267 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:49:44,308 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-11-06 22:49:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 22:49:44,314 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:44,316 INFO L410 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] [2019-11-06 22:49:44,318 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:44,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:44,324 INFO L82 PathProgramCache]: Analyzing trace with hash -830521731, now seen corresponding path program 1 times [2019-11-06 22:49:44,334 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:44,334 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446469155] [2019-11-06 22:49:44,335 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:44,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446469155] [2019-11-06 22:49:44,687 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:44,687 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:49:44,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688882761] [2019-11-06 22:49:44,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:49:44,697 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:44,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:49:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:49:44,715 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-11-06 22:49:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:50,013 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-11-06 22:49:50,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:49:50,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2019-11-06 22:49:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:50,052 INFO L225 Difference]: With dead ends: 2443 [2019-11-06 22:49:50,052 INFO L226 Difference]: Without dead ends: 1542 [2019-11-06 22:49:50,065 INFO L630 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 [2019-11-06 22:49:50,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-11-06 22:49:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-11-06 22:49:50,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-11-06 22:49:50,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2852 transitions. [2019-11-06 22:49:50,219 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2852 transitions. Word has length 24 [2019-11-06 22:49:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:50,222 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2852 transitions. [2019-11-06 22:49:50,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:49:50,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2852 transitions. [2019-11-06 22:49:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-06 22:49:50,227 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:50,227 INFO L410 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] [2019-11-06 22:49:50,227 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:50,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:50,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2086118223, now seen corresponding path program 1 times [2019-11-06 22:49:50,228 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:50,228 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686959619] [2019-11-06 22:49:50,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:50,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:50,438 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:50,439 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686959619] [2019-11-06 22:49:50,440 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:49:50,440 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:49:50,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788714148] [2019-11-06 22:49:50,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:49:50,443 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:50,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:49:50,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:49:50,443 INFO L87 Difference]: Start difference. First operand 1542 states and 2852 transitions. Second operand 5 states. [2019-11-06 22:49:57,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:49:57,042 INFO L93 Difference]: Finished difference Result 4685 states and 8680 transitions. [2019-11-06 22:49:57,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 22:49:57,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2019-11-06 22:49:57,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:49:57,067 INFO L225 Difference]: With dead ends: 4685 [2019-11-06 22:49:57,067 INFO L226 Difference]: Without dead ends: 3149 [2019-11-06 22:49:57,071 INFO L630 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 [2019-11-06 22:49:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3149 states. [2019-11-06 22:49:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3149 to 3117. [2019-11-06 22:49:57,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3117 states. [2019-11-06 22:49:57,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3117 states to 3117 states and 5119 transitions. [2019-11-06 22:49:57,204 INFO L78 Accepts]: Start accepts. Automaton has 3117 states and 5119 transitions. Word has length 93 [2019-11-06 22:49:57,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:49:57,205 INFO L462 AbstractCegarLoop]: Abstraction has 3117 states and 5119 transitions. [2019-11-06 22:49:57,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:49:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3117 states and 5119 transitions. [2019-11-06 22:49:57,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-06 22:49:57,212 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:49:57,213 INFO L410 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] [2019-11-06 22:49:57,214 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:49:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:49:57,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1697930939, now seen corresponding path program 1 times [2019-11-06 22:49:57,215 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:49:57,215 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108576113] [2019-11-06 22:49:57,216 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:49:57,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:57,483 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:49:57,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108576113] [2019-11-06 22:49:57,484 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155608840] [2019-11-06 22:49:57,484 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 [2019-11-06 22:49:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:49:57,609 INFO L256 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 22:49:57,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:49:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:49:57,730 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:49:57,870 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:49:57,871 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:49:57,871 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 11 [2019-11-06 22:49:57,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122648400] [2019-11-06 22:49:57,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:49:57,872 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:49:57,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:49:57,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:49:57,873 INFO L87 Difference]: Start difference. First operand 3117 states and 5119 transitions. Second operand 4 states. [2019-11-06 22:50:04,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:50:04,073 INFO L93 Difference]: Finished difference Result 9407 states and 15662 transitions. [2019-11-06 22:50:04,073 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:50:04,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 99 [2019-11-06 22:50:04,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:50:04,112 INFO L225 Difference]: With dead ends: 9407 [2019-11-06 22:50:04,112 INFO L226 Difference]: Without dead ends: 6296 [2019-11-06 22:50:04,121 INFO L630 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 [2019-11-06 22:50:04,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6296 states. [2019-11-06 22:50:04,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6296 to 6296. [2019-11-06 22:50:04,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6296 states. [2019-11-06 22:50:04,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 9175 transitions. [2019-11-06 22:50:04,321 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 9175 transitions. Word has length 99 [2019-11-06 22:50:04,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:50:04,322 INFO L462 AbstractCegarLoop]: Abstraction has 6296 states and 9175 transitions. [2019-11-06 22:50:04,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:50:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 9175 transitions. [2019-11-06 22:50:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-11-06 22:50:04,328 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:50:04,328 INFO L410 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] [2019-11-06 22:50:04,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:50:04,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:50:04,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:50:04,534 INFO L82 PathProgramCache]: Analyzing trace with hash -2146729072, now seen corresponding path program 1 times [2019-11-06 22:50:04,534 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:50:04,534 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071547213] [2019-11-06 22:50:04,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:50:04,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:50:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:50:04,839 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071547213] [2019-11-06 22:50:04,840 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:50:04,840 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:50:04,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11112265] [2019-11-06 22:50:04,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:50:04,844 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:50:04,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:50:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:50:04,845 INFO L87 Difference]: Start difference. First operand 6296 states and 9175 transitions. Second operand 6 states.