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/Problem02_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:57:13,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:57:13,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:57:13,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:57:13,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:57:13,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:57:13,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:57:13,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:57:13,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:57:13,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:57:13,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:57:13,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:57:13,826 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:57:13,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:57:13,828 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:57:13,829 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:57:13,830 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:57:13,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:57:13,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:57:13,835 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:57:13,836 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:57:13,838 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:57:13,839 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:57:13,840 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:57:13,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:57:13,845 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:57:13,845 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:57:13,846 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:57:13,847 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:57:13,848 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:57:13,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:57:13,851 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:57:13,853 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:57:13,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:57:13,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:57:13,855 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:57:13,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:57:13,856 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:57:13,856 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:57:13,860 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:57:13,861 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:57:13,864 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:57:13,889 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:57:13,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:57:13,893 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:57:13,893 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:57:13,894 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:57:13,894 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:57:13,894 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:57:13,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:57:13,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:57:13,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:57:13,896 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:57:13,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:57:13,896 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:57:13,897 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:57:13,897 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:57:13,897 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:57:13,897 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:57:13,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:57:13,898 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:57:13,898 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:57:13,898 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:57:13,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:13,899 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:57:13,899 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:57:13,899 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:57:13,899 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:57:13,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:57:13,900 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:57:13,900 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-14 23:57:14,189 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:57:14,208 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:57:14,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:57:14,213 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:57:14,214 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:57:14,215 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-10-14 23:57:14,294 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3f27aca/6d3241639172436f83b156b55b087518/FLAGf7b1ede97 [2019-10-14 23:57:14,870 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:57:14,873 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label40.c [2019-10-14 23:57:14,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3f27aca/6d3241639172436f83b156b55b087518/FLAGf7b1ede97 [2019-10-14 23:57:15,170 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4f3f27aca/6d3241639172436f83b156b55b087518 [2019-10-14 23:57:15,180 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:57:15,182 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:57:15,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:15,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:57:15,187 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:57:15,188 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:15,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33327728 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15, skipping insertion in model container [2019-10-14 23:57:15,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:15,199 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:57:15,258 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:57:15,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:15,783 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:57:15,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:57:15,954 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:57:15,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15 WrapperNode [2019-10-14 23:57:15,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:57:15,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:57:15,958 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:57:15,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:57:15,969 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:15,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:15,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:15,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:16,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:16,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:16,067 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... [2019-10-14 23:57:16,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:57:16,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:57:16,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:57:16,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:57:16,092 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:57:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:57:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:57:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:57:16,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:57:16,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:57:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:57:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:57:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:57:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:57:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:57:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:57:17,369 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:57:17,369 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:57:17,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:17 BoogieIcfgContainer [2019-10-14 23:57:17,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:57:17,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:57:17,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:57:17,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:57:17,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:57:15" (1/3) ... [2019-10-14 23:57:17,377 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f51ddd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:17, skipping insertion in model container [2019-10-14 23:57:17,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:57:15" (2/3) ... [2019-10-14 23:57:17,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f51ddd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:57:17, skipping insertion in model container [2019-10-14 23:57:17,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:57:17" (3/3) ... [2019-10-14 23:57:17,380 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label40.c [2019-10-14 23:57:17,390 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:57:17,399 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:57:17,410 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:57:17,438 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:57:17,439 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:57:17,439 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:57:17,439 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:57:17,439 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:57:17,439 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:57:17,440 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:57:17,440 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:57:17,464 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:57:17,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 23:57:17,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:17,477 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:57:17,479 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:17,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:17,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1033095319, now seen corresponding path program 1 times [2019-10-14 23:57:17,493 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:17,493 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495186700] [2019-10-14 23:57:17,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:17,493 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:17,494 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:17,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:18,015 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495186700] [2019-10-14 23:57:18,016 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:18,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:57:18,018 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193829998] [2019-10-14 23:57:18,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:57:18,029 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:18,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:57:18,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:57:18,051 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 4 states. [2019-10-14 23:57:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:19,356 INFO L93 Difference]: Finished difference Result 784 states and 1369 transitions. [2019-10-14 23:57:19,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:57:19,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2019-10-14 23:57:19,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:19,378 INFO L225 Difference]: With dead ends: 784 [2019-10-14 23:57:19,378 INFO L226 Difference]: Without dead ends: 472 [2019-10-14 23:57:19,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:57:19,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2019-10-14 23:57:19,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 321. [2019-10-14 23:57:19,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2019-10-14 23:57:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 468 transitions. [2019-10-14 23:57:19,502 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 468 transitions. Word has length 95 [2019-10-14 23:57:19,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:19,504 INFO L462 AbstractCegarLoop]: Abstraction has 321 states and 468 transitions. [2019-10-14 23:57:19,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:57:19,505 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 468 transitions. [2019-10-14 23:57:19,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 23:57:19,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:19,510 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 23:57:19,511 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:19,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:19,511 INFO L82 PathProgramCache]: Analyzing trace with hash -377311506, now seen corresponding path program 1 times [2019-10-14 23:57:19,512 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:19,512 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130485939] [2019-10-14 23:57:19,512 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:19,512 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:19,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:19,689 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130485939] [2019-10-14 23:57:19,689 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:57:19,690 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:57:19,690 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833753383] [2019-10-14 23:57:19,694 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:57:19,694 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:57:19,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:57:19,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:57:19,695 INFO L87 Difference]: Start difference. First operand 321 states and 468 transitions. Second operand 4 states. [2019-10-14 23:57:20,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:57:20,679 INFO L93 Difference]: Finished difference Result 1218 states and 1822 transitions. [2019-10-14 23:57:20,680 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:57:20,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2019-10-14 23:57:20,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:57:20,687 INFO L225 Difference]: With dead ends: 1218 [2019-10-14 23:57:20,687 INFO L226 Difference]: Without dead ends: 903 [2019-10-14 23:57:20,690 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 [2019-10-14 23:57:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2019-10-14 23:57:20,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 899. [2019-10-14 23:57:20,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 899 states. [2019-10-14 23:57:20,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1244 transitions. [2019-10-14 23:57:20,747 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1244 transitions. Word has length 103 [2019-10-14 23:57:20,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:57:20,747 INFO L462 AbstractCegarLoop]: Abstraction has 899 states and 1244 transitions. [2019-10-14 23:57:20,747 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:57:20,748 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1244 transitions. [2019-10-14 23:57:20,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-10-14 23:57:20,757 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:57:20,757 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 23:57:20,758 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:57:20,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:57:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash 549151607, now seen corresponding path program 1 times [2019-10-14 23:57:20,759 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:57:20,759 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981443207] [2019-10-14 23:57:20,759 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:20,760 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:57:20,760 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:57:20,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:20,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 23:57:20,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981443207] [2019-10-14 23:57:20,924 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239759523] [2019-10-14 23:57:20,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:57:21,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:57:21,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:57:21,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:57:21,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:21,131 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:57:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:57:21,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1299694955] [2019-10-14 23:57:21,264 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 114 [2019-10-14 23:57:21,318 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:57:21,319 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)