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/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 19:28:31,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 19:28:31,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 19:28:31,124 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 19:28:31,124 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 19:28:31,125 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 19:28:31,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 19:28:31,129 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 19:28:31,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 19:28:31,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 19:28:31,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 19:28:31,133 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 19:28:31,133 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 19:28:31,134 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 19:28:31,135 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 19:28:31,137 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 19:28:31,137 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 19:28:31,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 19:28:31,140 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 19:28:31,142 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 19:28:31,144 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 19:28:31,145 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 19:28:31,146 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 19:28:31,147 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 19:28:31,150 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-02 19:28:31,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-02 19:28:31,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-02 19:28:31,151 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-02 19:28:31,152 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-02 19:28:31,153 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-02 19:28:31,153 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 19:28:31,154 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 19:28:31,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 19:28:31,155 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 19:28:31,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 19:28:31,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 19:28:31,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 19:28:31,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 19:28:31,158 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 19:28:31,159 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 19:28:31,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 19:28:31,160 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 19:28:31,176 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 19:28:31,176 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 19:28:31,177 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 19:28:31,177 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 19:28:31,178 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 19:28:31,178 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 19:28:31,178 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 19:28:31,178 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 19:28:31,179 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 19:28:31,179 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 19:28:31,179 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 19:28:31,180 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 19:28:31,180 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 19:28:31,180 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 19:28:31,180 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 19:28:31,180 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 19:28:31,181 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 19:28:31,181 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 19:28:31,181 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 19:28:31,181 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 19:28:31,182 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 19:28:31,182 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 19:28:31,182 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 19:28:31,182 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 19:28:31,182 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 19:28:31,183 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 19:28:31,183 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 19:28:31,183 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 19:28:31,183 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 19:28:31,183 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 19:28:31,220 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 19:28:31,232 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 19:28:31,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 19:28:31,237 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 19:28:31,237 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 19:28:31,238 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-02 19:28:31,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bcfbfb7/e3a1b383a0e44d5da3fa677c74d4f047/FLAG985dcb6e1 [2019-10-02 19:28:31,946 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 19:28:31,946 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label09.c [2019-10-02 19:28:31,963 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bcfbfb7/e3a1b383a0e44d5da3fa677c74d4f047/FLAG985dcb6e1 [2019-10-02 19:28:32,133 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d5bcfbfb7/e3a1b383a0e44d5da3fa677c74d4f047 [2019-10-02 19:28:32,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 19:28:32,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 19:28:32,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 19:28:32,146 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 19:28:32,149 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 19:28:32,150 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:28:32" (1/1) ... [2019-10-02 19:28:32,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134703a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:32, skipping insertion in model container [2019-10-02 19:28:32,154 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 07:28:32" (1/1) ... [2019-10-02 19:28:32,161 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 19:28:32,234 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 19:28:32,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:28:32,982 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 19:28:33,286 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 19:28:33,312 INFO L192 MainTranslator]: Completed translation [2019-10-02 19:28:33,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33 WrapperNode [2019-10-02 19:28:33,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 19:28:33,314 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 19:28:33,315 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 19:28:33,315 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 19:28:33,336 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,336 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,375 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,480 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,497 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (1/1) ... [2019-10-02 19:28:33,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 19:28:33,514 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 19:28:33,514 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 19:28:33,514 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 19:28:33,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (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 [2019-10-02 19:28:33,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 19:28:33,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 19:28:33,589 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 19:28:33,589 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 19:28:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 19:28:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 19:28:33,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 19:28:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 19:28:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 19:28:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 19:28:33,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 19:28:35,534 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 19:28:35,535 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 19:28:35,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:28:35 BoogieIcfgContainer [2019-10-02 19:28:35,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 19:28:35,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 19:28:35,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 19:28:35,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 19:28:35,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 07:28:32" (1/3) ... [2019-10-02 19:28:35,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@961ab5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:28:35, skipping insertion in model container [2019-10-02 19:28:35,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 07:28:33" (2/3) ... [2019-10-02 19:28:35,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@961ab5c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 07:28:35, skipping insertion in model container [2019-10-02 19:28:35,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 07:28:35" (3/3) ... [2019-10-02 19:28:35,548 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2019-10-02 19:28:35,559 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 19:28:35,572 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 19:28:35,592 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 19:28:35,626 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 19:28:35,627 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 19:28:35,627 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 19:28:35,627 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 19:28:35,627 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 19:28:35,627 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 19:28:35,628 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 19:28:35,628 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 19:28:35,665 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-02 19:28:35,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-02 19:28:35,685 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:28:35,686 INFO L411 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] [2019-10-02 19:28:35,689 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:28:35,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:28:35,696 INFO L82 PathProgramCache]: Analyzing trace with hash -869319573, now seen corresponding path program 1 times [2019-10-02 19:28:35,698 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:28:35,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:35,755 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:28:35,755 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:35,756 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:28:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:28:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:28:36,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:28:36,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 19:28:36,236 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:28:36,242 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 19:28:36,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 19:28:36,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 19:28:36,261 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-02 19:28:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:28:38,517 INFO L93 Difference]: Finished difference Result 695 states and 994 transitions. [2019-10-02 19:28:38,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 19:28:38,522 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 72 [2019-10-02 19:28:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:28:38,545 INFO L225 Difference]: With dead ends: 695 [2019-10-02 19:28:38,546 INFO L226 Difference]: Without dead ends: 622 [2019-10-02 19:28:38,548 INFO L640 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 [2019-10-02 19:28:38,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-02 19:28:38,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-02 19:28:38,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-02 19:28:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-02 19:28:38,639 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 72 [2019-10-02 19:28:38,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:28:38,640 INFO L475 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-02 19:28:38,640 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 19:28:38,640 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-02 19:28:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-02 19:28:38,649 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:28:38,649 INFO L411 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, 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] [2019-10-02 19:28:38,650 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:28:38,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:28:38,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1437675110, now seen corresponding path program 1 times [2019-10-02 19:28:38,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:28:38,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:38,652 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:28:38,652 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:38,652 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:28:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:28:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:28:38,907 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 19:28:38,907 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 19:28:38,907 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:28:38,909 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 19:28:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 19:28:38,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-02 19:28:38,910 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-02 19:28:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 19:28:40,683 INFO L93 Difference]: Finished difference Result 1221 states and 1621 transitions. [2019-10-02 19:28:40,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 19:28:40,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 152 [2019-10-02 19:28:40,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 19:28:40,692 INFO L225 Difference]: With dead ends: 1221 [2019-10-02 19:28:40,692 INFO L226 Difference]: Without dead ends: 1221 [2019-10-02 19:28:40,693 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-02 19:28:40,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2019-10-02 19:28:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1210. [2019-10-02 19:28:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-02 19:28:40,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1600 transitions. [2019-10-02 19:28:40,764 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1600 transitions. Word has length 152 [2019-10-02 19:28:40,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 19:28:40,765 INFO L475 AbstractCegarLoop]: Abstraction has 1210 states and 1600 transitions. [2019-10-02 19:28:40,765 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 19:28:40,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1600 transitions. [2019-10-02 19:28:40,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-02 19:28:40,783 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 19:28:40,784 INFO L411 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, 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] [2019-10-02 19:28:40,784 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 19:28:40,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:28:40,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1147537460, now seen corresponding path program 1 times [2019-10-02 19:28:40,785 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 19:28:40,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:40,786 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 19:28:40,786 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 19:28:40,787 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 19:28:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 19:28:41,082 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 60 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 19:28:41,085 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 19:28:41,085 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 19:28:41,087 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 204 with the following transitions: [2019-10-02 19:28:41,090 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [9], [17], [25], [33], [41], [49], [57], [65], [73], [81], [89], [97], [105], [113], [121], [129], [137], [145], [153], [161], [169], [177], [185], [193], [201], [209], [217], [225], [233], [241], [249], [257], [265], [273], [281], [289], [297], [305], [313], [321], [329], [337], [345], [353], [361], [369], [377], [385], [393], [401], [409], [417], [425], [433], [441], [449], [457], [465], [473], [481], [485], [487], [490], [495], [499], [503], [507], [511], [515], [519], [523], [527], [531], [535], [539], [543], [547], [551], [555], [559], [563], [567], [571], [575], [579], [583], [587], [591], [595], [599], [603], [607], [611], [615], [626], [630], [634], [638], [642], [646], [650], [654], [658], [662], [666], [677], [688], [692], [696], [707], [711], [715], [719], [723], [727], [731], [735], [739], [743], [747], [751], [762], [766], [769], [772], [776], [1084], [1088], [1097], [1101], [1103], [1108], [1109], [1110], [1112], [1113] [2019-10-02 19:28:41,181 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 19:28:41,182 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 19:32:10,967 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 19:34:50,955 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 19:34:50,958 INFO L272 AbstractInterpreter]: Visited 138 different actions 271 times. Merged at 4 different actions 5 times. Never widened. Performed 651 root evaluator evaluations with a maximum evaluation depth of 17. Performed 651 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Found 1 fixpoints after 1 different actions. Largest state had 28 variables. [2019-10-02 19:34:50,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 19:34:50,963 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 19:37:07,845 INFO L227 lantSequenceWeakener]: Weakened 200 states. On average, predicates are now at 74.01% of their original sizes. [2019-10-02 19:37:07,846 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 19:37:07,967 INFO L420 sIntCurrentIteration]: We unified 202 AI predicates to 202 [2019-10-02 19:37:07,968 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 19:37:07,969 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 19:37:07,969 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [13] imperfect sequences [8] total 19 [2019-10-02 19:37:07,969 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 19:37:07,970 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-02 19:37:07,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-02 19:37:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-02 19:37:07,971 INFO L87 Difference]: Start difference. First operand 1210 states and 1600 transitions. Second operand 13 states.