java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:07:50,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:07:50,745 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:07:50,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:07:50,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:07:50,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:07:50,769 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:07:50,781 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:07:50,783 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:07:50,784 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:07:50,785 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:07:50,786 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:07:50,787 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:07:50,787 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:07:50,788 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:07:50,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:07:50,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:07:50,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:07:50,798 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:07:50,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:07:50,801 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:07:50,802 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:07:50,803 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:07:50,804 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:07:50,806 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 20:07:50,809 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:07:50,810 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:07:50,811 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:07:50,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:07:50,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:07:50,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:07:50,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:07:50,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:07:50,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:07:50,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:07:50,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:07:50,816 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 20:07:50,832 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:07:50,832 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:07:50,834 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:07:50,834 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:07:50,835 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:07:50,835 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:07:50,835 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:07:50,835 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:07:50,836 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:07:50,836 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:07:50,836 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:07:50,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:07:50,837 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:07:50,838 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:07:50,838 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:07:50,838 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:07:50,838 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:07:50,838 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:07:50,839 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:07:50,839 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:07:50,839 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:07:50,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:50,840 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:07:50,840 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:07:50,840 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:07:50,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:07:50,841 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:07:50,841 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:07:50,841 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 20:07:51,122 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:07:51,136 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:07:51,140 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:07:51,141 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:07:51,142 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:07:51,142 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-13 20:07:51,221 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6258f475/7f86db7302344ec6b84a40653ecf3d34/FLAG03f925cc1 [2019-10-13 20:07:51,892 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:07:51,894 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label55.c [2019-10-13 20:07:51,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6258f475/7f86db7302344ec6b84a40653ecf3d34/FLAG03f925cc1 [2019-10-13 20:07:52,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6258f475/7f86db7302344ec6b84a40653ecf3d34 [2019-10-13 20:07:52,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:07:52,168 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:07:52,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:52,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:07:52,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:07:52,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:52,176 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a6cffa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52, skipping insertion in model container [2019-10-13 20:07:52,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:52,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:07:52,244 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:07:52,820 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:52,825 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:07:52,942 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:07:52,960 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:07:52,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52 WrapperNode [2019-10-13 20:07:52,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:07:52,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:07:52,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:07:52,962 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:07:52,981 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:52,981 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,003 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,004 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,079 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... [2019-10-13 20:07:53,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:07:53,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:07:53,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:07:53,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:07:53,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:07:53,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:07:53,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:07:53,185 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:07:53,185 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:07:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:07:53,186 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:07:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:07:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:07:53,187 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:07:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:07:53,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:07:54,774 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:07:54,775 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:07:54,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:54 BoogieIcfgContainer [2019-10-13 20:07:54,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:07:54,778 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:07:54,778 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:07:54,782 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:07:54,782 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:07:52" (1/3) ... [2019-10-13 20:07:54,783 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffbb4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:54, skipping insertion in model container [2019-10-13 20:07:54,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:07:52" (2/3) ... [2019-10-13 20:07:54,784 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ffbb4f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:07:54, skipping insertion in model container [2019-10-13 20:07:54,784 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:07:54" (3/3) ... [2019-10-13 20:07:54,790 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label55.c [2019-10-13 20:07:54,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:07:54,813 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:07:54,825 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:07:54,855 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:07:54,855 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:07:54,855 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:07:54,856 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:07:54,856 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:07:54,856 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:07:54,856 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:07:54,856 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:07:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 20:07:54,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 20:07:54,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:54,895 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:54,897 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:54,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:54,904 INFO L82 PathProgramCache]: Analyzing trace with hash 606791250, now seen corresponding path program 1 times [2019-10-13 20:07:54,914 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:54,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821142575] [2019-10-13 20:07:54,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,915 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:54,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:55,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:55,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:55,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821142575] [2019-10-13 20:07:55,233 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:55,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:55,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293820696] [2019-10-13 20:07:55,241 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:55,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:55,265 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-13 20:07:57,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:57,330 INFO L93 Difference]: Finished difference Result 890 states and 1607 transitions. [2019-10-13 20:07:57,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:57,332 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2019-10-13 20:07:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:57,353 INFO L225 Difference]: With dead ends: 890 [2019-10-13 20:07:57,353 INFO L226 Difference]: Without dead ends: 554 [2019-10-13 20:07:57,362 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:57,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2019-10-13 20:07:57,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 554. [2019-10-13 20:07:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-10-13 20:07:57,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 806 transitions. [2019-10-13 20:07:57,480 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 806 transitions. Word has length 63 [2019-10-13 20:07:57,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:57,481 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 806 transitions. [2019-10-13 20:07:57,481 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:57,481 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 806 transitions. [2019-10-13 20:07:57,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-13 20:07:57,493 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:57,494 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:57,494 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:57,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:57,495 INFO L82 PathProgramCache]: Analyzing trace with hash 905975074, now seen corresponding path program 1 times [2019-10-13 20:07:57,498 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:57,498 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130338214] [2019-10-13 20:07:57,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,498 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:57,498 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:57,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:57,848 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130338214] [2019-10-13 20:07:57,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:07:57,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:07:57,849 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652535733] [2019-10-13 20:07:57,851 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:07:57,852 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:07:57,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:07:57,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:57,853 INFO L87 Difference]: Start difference. First operand 554 states and 806 transitions. Second operand 4 states. [2019-10-13 20:07:59,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:07:59,450 INFO L93 Difference]: Finished difference Result 2194 states and 3255 transitions. [2019-10-13 20:07:59,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:07:59,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 175 [2019-10-13 20:07:59,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:07:59,464 INFO L225 Difference]: With dead ends: 2194 [2019-10-13 20:07:59,464 INFO L226 Difference]: Without dead ends: 1646 [2019-10-13 20:07:59,467 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:07:59,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2019-10-13 20:07:59,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1464. [2019-10-13 20:07:59,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1464 states. [2019-10-13 20:07:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1464 states to 1464 states and 2038 transitions. [2019-10-13 20:07:59,537 INFO L78 Accepts]: Start accepts. Automaton has 1464 states and 2038 transitions. Word has length 175 [2019-10-13 20:07:59,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:07:59,538 INFO L462 AbstractCegarLoop]: Abstraction has 1464 states and 2038 transitions. [2019-10-13 20:07:59,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:07:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 1464 states and 2038 transitions. [2019-10-13 20:07:59,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2019-10-13 20:07:59,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:07:59,547 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:07:59,547 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:07:59,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:07:59,548 INFO L82 PathProgramCache]: Analyzing trace with hash 338201322, now seen corresponding path program 1 times [2019-10-13 20:07:59,548 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:07:59,548 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383367031] [2019-10-13 20:07:59,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,549 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:07:59,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:07:59,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:59,815 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:07:59,815 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383367031] [2019-10-13 20:07:59,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753261946] [2019-10-13 20:07:59,816 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:07:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:07:59,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 20:07:59,934 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:08:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:00,064 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:08:00,261 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:08:00,262 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [526599286] [2019-10-13 20:08:00,277 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 258 [2019-10-13 20:08:00,340 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 20:08:00,340 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 20:08:09,534 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 20:08:09,536 INFO L272 AbstractInterpreter]: Visited 116 different actions 116 times. Never merged. Never widened. Performed 271 root evaluator evaluations with a maximum evaluation depth of 13. Performed 271 inverse root evaluator evaluations with a maximum inverse evaluation depth of 13. Never found a fixpoint. Largest state had 24 variables. [2019-10-13 20:08:09,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:08:09,543 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 20:08:16,863 INFO L227 lantSequenceWeakener]: Weakened 238 states. On average, predicates are now at 78.25% of their original sizes. [2019-10-13 20:08:16,863 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 20:08:16,953 INFO L553 sIntCurrentIteration]: We unified 256 AI predicates to 256 [2019-10-13 20:08:16,954 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 20:08:16,955 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 20:08:16,955 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 5, 5] total 20 [2019-10-13 20:08:16,955 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381579926] [2019-10-13 20:08:16,956 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 20:08:16,957 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 20:08:16,957 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 20:08:16,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 20:08:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-13 20:08:16,958 INFO L87 Difference]: Start difference. First operand 1464 states and 2038 transitions. Second operand 11 states.