/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/Problem10_label56.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:44:34,264 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:44:34,267 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:44:34,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:44:34,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:44:34,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:44:34,286 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:44:34,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:44:34,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:44:34,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:44:34,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:44:34,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:44:34,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:44:34,294 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:44:34,294 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:44:34,296 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:44:34,296 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:44:34,297 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:44:34,299 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:44:34,301 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:44:34,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:44:34,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:44:34,305 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:44:34,306 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:44:34,308 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:44:34,308 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:44:34,309 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:44:34,312 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:44:34,312 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:44:34,315 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:44:34,315 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:44:34,316 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:44:34,317 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:44:34,317 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:44:34,318 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:44:34,318 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:44:34,322 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:44:34,322 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:44:34,322 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:44:34,326 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:44:34,326 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:44:34,328 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 22:44:34,347 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:44:34,348 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:44:34,349 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:44:34,349 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:44:34,350 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:44:34,350 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:44:34,350 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:44:34,350 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:44:34,350 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:44:34,351 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:44:34,351 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:44:34,351 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:44:34,351 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:44:34,351 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:44:34,352 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:44:34,352 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:44:34,352 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:44:34,352 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:44:34,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:44:34,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:44:34,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:44:34,353 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:44:34,353 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:44:34,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:44:34,354 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:44:34,354 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:44:34,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:44:34,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:44:34,355 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 22:44:34,642 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:44:34,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:44:34,663 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:44:34,664 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:44:34,664 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:44:34,665 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-11-06 22:44:34,742 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32866058/7497e157595141c6a28e6610f1735e31/FLAG112c7377f [2019-11-06 22:44:35,318 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:44:35,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label56.c [2019-11-06 22:44:35,335 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32866058/7497e157595141c6a28e6610f1735e31/FLAG112c7377f [2019-11-06 22:44:35,631 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d32866058/7497e157595141c6a28e6610f1735e31 [2019-11-06 22:44:35,638 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:44:35,640 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:44:35,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:35,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:44:35,644 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:44:35,645 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:35" (1/1) ... [2019-11-06 22:44:35,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed1c93f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:35, skipping insertion in model container [2019-11-06 22:44:35,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:44:35" (1/1) ... [2019-11-06 22:44:35,655 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:44:35,708 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:44:36,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:36,208 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:44:36,352 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:44:36,366 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:44:36,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36 WrapperNode [2019-11-06 22:44:36,366 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:44:36,367 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:44:36,367 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:44:36,367 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:44:36,377 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,377 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,394 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,395 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (1/1) ... [2019-11-06 22:44:36,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:44:36,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:44:36,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:44:36,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:44:36,503 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (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 22:44:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:44:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:44:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:44:36,583 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:44:36,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:44:36,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:44:37,762 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:44:37,762 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:44:37,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:37 BoogieIcfgContainer [2019-11-06 22:44:37,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:44:37,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:44:37,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:44:37,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:44:37,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:44:35" (1/3) ... [2019-11-06 22:44:37,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5138825f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:37, skipping insertion in model container [2019-11-06 22:44:37,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:44:36" (2/3) ... [2019-11-06 22:44:37,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5138825f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:44:37, skipping insertion in model container [2019-11-06 22:44:37,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:44:37" (3/3) ... [2019-11-06 22:44:37,773 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label56.c [2019-11-06 22:44:37,782 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:44:37,791 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:44:37,802 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:44:37,830 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:44:37,831 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:44:37,831 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:44:37,831 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:44:37,831 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:44:37,832 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:44:37,832 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:44:37,832 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:44:37,859 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-11-06 22:44:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 22:44:37,869 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:37,870 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, 1, 1, 1, 1, 1] [2019-11-06 22:44:37,873 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:37,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:37,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1758937742, now seen corresponding path program 1 times [2019-11-06 22:44:37,888 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:37,888 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882877209] [2019-11-06 22:44:37,888 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:38,128 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 22:44:38,129 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882877209] [2019-11-06 22:44:38,129 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:38,130 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:44:38,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559781322] [2019-11-06 22:44:38,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:38,138 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:38,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:38,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:44:38,155 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-11-06 22:44:39,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:39,143 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-11-06 22:44:39,144 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:39,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2019-11-06 22:44:39,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:39,164 INFO L225 Difference]: With dead ends: 571 [2019-11-06 22:44:39,164 INFO L226 Difference]: Without dead ends: 294 [2019-11-06 22:44:39,170 INFO L630 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 [2019-11-06 22:44:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-06 22:44:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-11-06 22:44:39,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-11-06 22:44:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 436 transitions. [2019-11-06 22:44:39,280 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 436 transitions. Word has length 29 [2019-11-06 22:44:39,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:39,281 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 436 transitions. [2019-11-06 22:44:39,281 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:39,281 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 436 transitions. [2019-11-06 22:44:39,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-11-06 22:44:39,290 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:39,291 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:39,291 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:39,292 INFO L82 PathProgramCache]: Analyzing trace with hash 30670753, now seen corresponding path program 1 times [2019-11-06 22:44:39,292 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:39,293 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484456885] [2019-11-06 22:44:39,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:39,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 22:44:39,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484456885] [2019-11-06 22:44:39,591 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226623284] [2019-11-06 22:44:39,591 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 22:44:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:39,665 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:39,675 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:39,734 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:39,802 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:44:39,802 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 5 [2019-11-06 22:44:39,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536581695] [2019-11-06 22:44:39,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:44:39,811 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:39,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:44:39,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:44:39,812 INFO L87 Difference]: Start difference. First operand 294 states and 436 transitions. Second operand 3 states. [2019-11-06 22:44:40,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:40,553 INFO L93 Difference]: Finished difference Result 582 states and 874 transitions. [2019-11-06 22:44:40,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:44:40,554 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 116 [2019-11-06 22:44:40,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:40,559 INFO L225 Difference]: With dead ends: 582 [2019-11-06 22:44:40,560 INFO L226 Difference]: Without dead ends: 580 [2019-11-06 22:44:40,561 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 233 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:44:40,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2019-11-06 22:44:40,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 437. [2019-11-06 22:44:40,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2019-11-06 22:44:40,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 658 transitions. [2019-11-06 22:44:40,581 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 658 transitions. Word has length 116 [2019-11-06 22:44:40,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:40,582 INFO L462 AbstractCegarLoop]: Abstraction has 437 states and 658 transitions. [2019-11-06 22:44:40,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:44:40,583 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 658 transitions. [2019-11-06 22:44:40,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-11-06 22:44:40,585 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:40,586 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:40,798 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:40,799 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 644320205, now seen corresponding path program 1 times [2019-11-06 22:44:40,801 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:40,801 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974376014] [2019-11-06 22:44:40,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:40,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:41,044 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:41,044 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974376014] [2019-11-06 22:44:41,045 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:41,045 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:44:41,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453079918] [2019-11-06 22:44:41,050 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:44:41,051 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:41,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:44:41,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:44:41,052 INFO L87 Difference]: Start difference. First operand 437 states and 658 transitions. Second operand 5 states. [2019-11-06 22:44:42,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:42,070 INFO L93 Difference]: Finished difference Result 1327 states and 2033 transitions. [2019-11-06 22:44:42,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:44:42,078 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 154 [2019-11-06 22:44:42,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:42,089 INFO L225 Difference]: With dead ends: 1327 [2019-11-06 22:44:42,092 INFO L226 Difference]: Without dead ends: 896 [2019-11-06 22:44:42,094 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-06 22:44:42,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-11-06 22:44:42,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 886. [2019-11-06 22:44:42,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-11-06 22:44:42,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1296 transitions. [2019-11-06 22:44:42,134 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1296 transitions. Word has length 154 [2019-11-06 22:44:42,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:42,135 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1296 transitions. [2019-11-06 22:44:42,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:44:42,136 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1296 transitions. [2019-11-06 22:44:42,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-11-06 22:44:42,141 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:42,141 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:42,141 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:42,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:42,142 INFO L82 PathProgramCache]: Analyzing trace with hash 171733525, now seen corresponding path program 1 times [2019-11-06 22:44:42,142 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:42,142 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322527775] [2019-11-06 22:44:42,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:42,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:42,349 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:42,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322527775] [2019-11-06 22:44:42,349 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25495077] [2019-11-06 22:44:42,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:42,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:44:42,455 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 22:44:42,517 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 44 proven. 86 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:42,658 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:44:42,658 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2019-11-06 22:44:42,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352015859] [2019-11-06 22:44:42,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:44:42,660 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:44:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-06 22:44:42,660 INFO L87 Difference]: Start difference. First operand 886 states and 1296 transitions. Second operand 5 states. [2019-11-06 22:44:43,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:43,573 INFO L93 Difference]: Finished difference Result 2096 states and 3158 transitions. [2019-11-06 22:44:43,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:44:43,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 214 [2019-11-06 22:44:43,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:43,582 INFO L225 Difference]: With dead ends: 2096 [2019-11-06 22:44:43,582 INFO L226 Difference]: Without dead ends: 1216 [2019-11-06 22:44:43,584 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 422 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-11-06 22:44:43,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2019-11-06 22:44:43,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 1192. [2019-11-06 22:44:43,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2019-11-06 22:44:43,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 1614 transitions. [2019-11-06 22:44:43,625 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 1614 transitions. Word has length 214 [2019-11-06 22:44:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:43,625 INFO L462 AbstractCegarLoop]: Abstraction has 1192 states and 1614 transitions. [2019-11-06 22:44:43,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:44:43,625 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 1614 transitions. [2019-11-06 22:44:43,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-11-06 22:44:43,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:43,630 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:44:43,834 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:43,834 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:43,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:43,835 INFO L82 PathProgramCache]: Analyzing trace with hash -499290238, now seen corresponding path program 1 times [2019-11-06 22:44:43,836 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:43,836 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554725067] [2019-11-06 22:44:43,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:43,997 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-11-06 22:44:43,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554725067] [2019-11-06 22:44:43,998 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:44:43,998 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:44:43,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480479386] [2019-11-06 22:44:43,999 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:44:44,000 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:44,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:44:44,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:44,000 INFO L87 Difference]: Start difference. First operand 1192 states and 1614 transitions. Second operand 4 states. [2019-11-06 22:44:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:45,031 INFO L93 Difference]: Finished difference Result 3534 states and 4977 transitions. [2019-11-06 22:44:45,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:44:45,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 215 [2019-11-06 22:44:45,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:45,045 INFO L225 Difference]: With dead ends: 3534 [2019-11-06 22:44:45,045 INFO L226 Difference]: Without dead ends: 2348 [2019-11-06 22:44:45,048 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:44:45,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2348 states. [2019-11-06 22:44:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2348 to 2060. [2019-11-06 22:44:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-11-06 22:44:45,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2802 transitions. [2019-11-06 22:44:45,109 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2802 transitions. Word has length 215 [2019-11-06 22:44:45,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:45,110 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2802 transitions. [2019-11-06 22:44:45,110 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:44:45,110 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2802 transitions. [2019-11-06 22:44:45,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2019-11-06 22:44:45,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:45,117 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:45,117 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:45,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:45,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1918826263, now seen corresponding path program 1 times [2019-11-06 22:44:45,117 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:45,118 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884678524] [2019-11-06 22:44:45,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:45,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884678524] [2019-11-06 22:44:45,309 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167793564] [2019-11-06 22:44:45,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:45,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:44:45,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:45,543 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 95 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-11-06 22:44:45,543 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 44 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:44:45,669 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:44:45,669 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-11-06 22:44:45,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826527129] [2019-11-06 22:44:45,670 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:44:45,670 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:44:45,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:44:45,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-06 22:44:45,671 INFO L87 Difference]: Start difference. First operand 2060 states and 2802 transitions. Second operand 5 states. [2019-11-06 22:44:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:44:46,577 INFO L93 Difference]: Finished difference Result 5016 states and 7033 transitions. [2019-11-06 22:44:46,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 22:44:46,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 244 [2019-11-06 22:44:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:44:46,606 INFO L225 Difference]: With dead ends: 5016 [2019-11-06 22:44:46,606 INFO L226 Difference]: Without dead ends: 2962 [2019-11-06 22:44:46,613 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 484 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-11-06 22:44:46,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2962 states. [2019-11-06 22:44:46,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2962 to 2662. [2019-11-06 22:44:46,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2019-11-06 22:44:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 3604 transitions. [2019-11-06 22:44:46,705 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 3604 transitions. Word has length 244 [2019-11-06 22:44:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:44:46,706 INFO L462 AbstractCegarLoop]: Abstraction has 2662 states and 3604 transitions. [2019-11-06 22:44:46,706 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:44:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 3604 transitions. [2019-11-06 22:44:46,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2019-11-06 22:44:46,713 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:44:46,713 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:44:46,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:46,918 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:44:46,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:44:46,918 INFO L82 PathProgramCache]: Analyzing trace with hash -324525238, now seen corresponding path program 1 times [2019-11-06 22:44:46,919 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:44:46,919 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15586722] [2019-11-06 22:44:46,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:44:46,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 45 proven. 5 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-11-06 22:44:47,159 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15586722] [2019-11-06 22:44:47,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122074049] [2019-11-06 22:44:47,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:44:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:44:47,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:44:47,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:44:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:47,400 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:44:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 121 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:44:47,629 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [767028330] [2019-11-06 22:44:47,635 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 250 [2019-11-06 22:44:47,698 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:44:47,698 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:44:59,496 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.