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/Problem12_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 20:11:25,504 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 20:11:25,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 20:11:25,518 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-02 20:11:25,518 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-02 20:11:25,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-02 20:11:25,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-02 20:11:25,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-02 20:11:25,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-02 20:11:25,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-02 20:11:25,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-02 20:11:25,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-02 20:11:25,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 20:11:25,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 20:11:25,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 20:11:25,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 20:11:25,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 20:11:25,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 20:11:25,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 20:11:25,535 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 20:11:25,537 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 20:11:25,538 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 20:11:25,539 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 20:11:25,540 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 20:11:25,542 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 20:11:25,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-02 20:11:25,546 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-02 20:11:25,547 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-02 20:11:25,548 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-02 20:11:25,549 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-02 20:11:25,549 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-02 20:11:25,550 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-02 20:11:25,550 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-02 20:11:25,550 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 20:11:25,551 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 20:11:25,552 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 20:11:25,553 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 20:11:25,568 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 20:11:25,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 20:11:25,568 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 20:11:25,569 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 20:11:25,569 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 20:11:25,569 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 20:11:25,570 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 20:11:25,570 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 20:11:25,570 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 20:11:25,570 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 20:11:25,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 20:11:25,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 20:11:25,571 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 20:11:25,571 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 20:11:25,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 20:11:25,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 20:11:25,572 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 20:11:25,572 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 20:11:25,572 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 20:11:25,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 20:11:25,573 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 20:11:25,573 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 20:11:25,573 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 20:11:25,573 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 20:11:25,574 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 20:11:25,574 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 20:11:25,574 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 20:11:25,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 20:11:25,575 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 20:11:25,575 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 20:11:25,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 20:11:25,614 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 20:11:25,618 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 20:11:25,619 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 20:11:25,620 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 20:11:25,621 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-02 20:11:25,679 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e01d04be9/aa7fee1962454ceb9f7e948ec585bb70/FLAGe0278a735 [2019-10-02 20:11:26,373 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 20:11:26,374 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-02 20:11:26,420 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e01d04be9/aa7fee1962454ceb9f7e948ec585bb70/FLAGe0278a735 [2019-10-02 20:11:26,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e01d04be9/aa7fee1962454ceb9f7e948ec585bb70 [2019-10-02 20:11:26,520 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 20:11:26,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 20:11:26,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 20:11:26,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 20:11:26,533 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 20:11:26,534 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:11:26" (1/1) ... [2019-10-02 20:11:26,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@27396f35 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:26, skipping insertion in model container [2019-10-02 20:11:26,537 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 08:11:26" (1/1) ... [2019-10-02 20:11:26,544 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 20:11:26,708 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 20:11:28,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:11:28,203 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 20:11:28,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 20:11:28,836 INFO L192 MainTranslator]: Completed translation [2019-10-02 20:11:28,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28 WrapperNode [2019-10-02 20:11:28,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 20:11:28,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 20:11:28,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 20:11:28,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 20:11:28,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:28,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:28,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:28,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:29,042 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:29,074 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:29,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (1/1) ... [2019-10-02 20:11:29,172 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 20:11:29,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 20:11:29,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 20:11:29,173 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 20:11:29,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (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 20:11:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 20:11:29,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 20:11:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 20:11:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 20:11:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-02 20:11:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-02 20:11:29,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 20:11:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 20:11:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 20:11:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-02 20:11:29,253 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-02 20:11:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 20:11:29,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 20:11:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 20:11:29,255 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 20:11:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 20:11:29,256 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 20:11:34,240 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 20:11:34,240 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 20:11:34,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:11:34 BoogieIcfgContainer [2019-10-02 20:11:34,243 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 20:11:34,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 20:11:34,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 20:11:34,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 20:11:34,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 08:11:26" (1/3) ... [2019-10-02 20:11:34,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1b426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:11:34, skipping insertion in model container [2019-10-02 20:11:34,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 08:11:28" (2/3) ... [2019-10-02 20:11:34,250 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51d1b426 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 08:11:34, skipping insertion in model container [2019-10-02 20:11:34,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 08:11:34" (3/3) ... [2019-10-02 20:11:34,252 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label29.c [2019-10-02 20:11:34,263 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 20:11:34,272 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 20:11:34,289 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 20:11:34,319 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 20:11:34,319 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 20:11:34,320 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 20:11:34,320 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 20:11:34,320 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 20:11:34,320 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 20:11:34,320 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 20:11:34,320 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 20:11:34,365 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-02 20:11:34,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-02 20:11:34,380 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:11:34,381 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] [2019-10-02 20:11:34,383 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:11:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:11:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1364317718, now seen corresponding path program 1 times [2019-10-02 20:11:34,390 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:11:34,431 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:34,432 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:11:34,432 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:34,432 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:11:34,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:11:34,796 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 20:11:34,800 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:11:34,801 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:11:34,801 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:11:34,807 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:11:34,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:11:34,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:11:34,824 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 4 states. [2019-10-02 20:11:42,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:11:42,778 INFO L93 Difference]: Finished difference Result 2397 states and 3778 transitions. [2019-10-02 20:11:42,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:11:42,780 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-10-02 20:11:42,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:11:42,821 INFO L225 Difference]: With dead ends: 2397 [2019-10-02 20:11:42,822 INFO L226 Difference]: Without dead ends: 2309 [2019-10-02 20:11:42,824 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 20:11:42,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2019-10-02 20:11:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2309. [2019-10-02 20:11:42,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2309 states. [2019-10-02 20:11:43,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2309 states to 2309 states and 3659 transitions. [2019-10-02 20:11:43,011 INFO L78 Accepts]: Start accepts. Automaton has 2309 states and 3659 transitions. Word has length 61 [2019-10-02 20:11:43,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:11:43,012 INFO L475 AbstractCegarLoop]: Abstraction has 2309 states and 3659 transitions. [2019-10-02 20:11:43,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:11:43,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2309 states and 3659 transitions. [2019-10-02 20:11:43,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-02 20:11:43,019 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:11:43,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:43,020 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:11:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:11:43,021 INFO L82 PathProgramCache]: Analyzing trace with hash 921108326, now seen corresponding path program 1 times [2019-10-02 20:11:43,021 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:11:43,022 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:43,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:11:43,023 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:43,023 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:11:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:11:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:11:43,266 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:11:43,266 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-02 20:11:43,266 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:11:43,268 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-02 20:11:43,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-02 20:11:43,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-02 20:11:43,269 INFO L87 Difference]: Start difference. First operand 2309 states and 3659 transitions. Second operand 5 states. [2019-10-02 20:11:50,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:11:50,731 INFO L93 Difference]: Finished difference Result 4714 states and 6860 transitions. [2019-10-02 20:11:50,731 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-02 20:11:50,731 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 141 [2019-10-02 20:11:50,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:11:50,756 INFO L225 Difference]: With dead ends: 4714 [2019-10-02 20:11:50,756 INFO L226 Difference]: Without dead ends: 4714 [2019-10-02 20:11:50,757 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:11:50,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4714 states. [2019-10-02 20:11:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4714 to 4671. [2019-10-02 20:11:50,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4671 states. [2019-10-02 20:11:50,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 6780 transitions. [2019-10-02 20:11:50,873 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 6780 transitions. Word has length 141 [2019-10-02 20:11:50,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:11:50,874 INFO L475 AbstractCegarLoop]: Abstraction has 4671 states and 6780 transitions. [2019-10-02 20:11:50,874 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-02 20:11:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 6780 transitions. [2019-10-02 20:11:50,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-02 20:11:50,878 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:11:50,879 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:50,879 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:11:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:11:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2074427823, now seen corresponding path program 1 times [2019-10-02 20:11:50,879 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:11:50,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:50,881 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:11:50,881 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:50,881 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:11:50,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:11:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:11:51,042 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:11:51,042 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:11:51,042 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:11:51,043 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:11:51,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:11:51,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:11:51,044 INFO L87 Difference]: Start difference. First operand 4671 states and 6780 transitions. Second operand 6 states. [2019-10-02 20:11:57,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:11:57,881 INFO L93 Difference]: Finished difference Result 9647 states and 13935 transitions. [2019-10-02 20:11:57,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:11:57,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-10-02 20:11:57,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:11:57,935 INFO L225 Difference]: With dead ends: 9647 [2019-10-02 20:11:57,936 INFO L226 Difference]: Without dead ends: 9647 [2019-10-02 20:11:57,945 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 20:11:57,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9647 states. [2019-10-02 20:11:58,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9647 to 9523. [2019-10-02 20:11:58,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9523 states. [2019-10-02 20:11:58,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9523 states to 9523 states and 13580 transitions. [2019-10-02 20:11:58,215 INFO L78 Accepts]: Start accepts. Automaton has 9523 states and 13580 transitions. Word has length 174 [2019-10-02 20:11:58,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:11:58,216 INFO L475 AbstractCegarLoop]: Abstraction has 9523 states and 13580 transitions. [2019-10-02 20:11:58,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:11:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 9523 states and 13580 transitions. [2019-10-02 20:11:58,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-02 20:11:58,222 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:11:58,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:11:58,223 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:11:58,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:11:58,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1134260862, now seen corresponding path program 1 times [2019-10-02 20:11:58,224 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:11:58,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:58,227 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:11:58,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:11:58,227 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:11:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:11:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:11:58,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:11:58,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 20:11:58,493 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:11:58,494 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 20:11:58,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 20:11:58,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 20:11:58,495 INFO L87 Difference]: Start difference. First operand 9523 states and 13580 transitions. Second operand 6 states. [2019-10-02 20:12:05,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:12:05,330 INFO L93 Difference]: Finished difference Result 18612 states and 27123 transitions. [2019-10-02 20:12:05,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 20:12:05,330 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 185 [2019-10-02 20:12:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:12:05,422 INFO L225 Difference]: With dead ends: 18612 [2019-10-02 20:12:05,423 INFO L226 Difference]: Without dead ends: 18612 [2019-10-02 20:12:05,424 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 20:12:05,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18612 states. [2019-10-02 20:12:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18612 to 18511. [2019-10-02 20:12:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18511 states. [2019-10-02 20:12:05,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18511 states to 18511 states and 26600 transitions. [2019-10-02 20:12:05,826 INFO L78 Accepts]: Start accepts. Automaton has 18511 states and 26600 transitions. Word has length 185 [2019-10-02 20:12:05,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:12:05,827 INFO L475 AbstractCegarLoop]: Abstraction has 18511 states and 26600 transitions. [2019-10-02 20:12:05,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 20:12:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 18511 states and 26600 transitions. [2019-10-02 20:12:05,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2019-10-02 20:12:05,831 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:12:05,831 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:05,832 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:12:05,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:12:05,832 INFO L82 PathProgramCache]: Analyzing trace with hash 299938862, now seen corresponding path program 1 times [2019-10-02 20:12:05,832 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:12:05,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:12:05,835 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:12:05,835 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:12:05,836 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:12:05,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:12:05,994 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 20:12:05,994 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 20:12:05,994 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-02 20:12:05,994 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:12:05,995 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-02 20:12:05,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-02 20:12:05,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-02 20:12:05,996 INFO L87 Difference]: Start difference. First operand 18511 states and 26600 transitions. Second operand 4 states. [2019-10-02 20:12:12,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 20:12:12,363 INFO L93 Difference]: Finished difference Result 27917 states and 35885 transitions. [2019-10-02 20:12:12,364 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-02 20:12:12,364 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 209 [2019-10-02 20:12:12,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 20:12:12,460 INFO L225 Difference]: With dead ends: 27917 [2019-10-02 20:12:12,460 INFO L226 Difference]: Without dead ends: 27917 [2019-10-02 20:12:12,460 INFO L640 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 [2019-10-02 20:12:12,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27917 states. [2019-10-02 20:12:12,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27917 to 27915. [2019-10-02 20:12:12,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27915 states. [2019-10-02 20:12:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27915 states to 27915 states and 35883 transitions. [2019-10-02 20:12:12,985 INFO L78 Accepts]: Start accepts. Automaton has 27915 states and 35883 transitions. Word has length 209 [2019-10-02 20:12:12,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 20:12:12,986 INFO L475 AbstractCegarLoop]: Abstraction has 27915 states and 35883 transitions. [2019-10-02 20:12:12,986 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-02 20:12:12,986 INFO L276 IsEmpty]: Start isEmpty. Operand 27915 states and 35883 transitions. [2019-10-02 20:12:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-02 20:12:12,990 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 20:12:12,990 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:12:12,991 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 20:12:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:12:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1953631415, now seen corresponding path program 1 times [2019-10-02 20:12:12,991 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 20:12:12,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:12:12,995 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 20:12:12,995 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 20:12:12,995 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 20:12:13,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 20:12:13,179 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-02 20:12:13,180 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 20:12:13,180 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 20:12:13,181 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 211 with the following transitions: [2019-10-02 20:12:13,184 INFO L207 CegarAbsIntRunner]: [0], [1], [1868], [1875], [1883], [1891], [1899], [1907], [1915], [1923], [1931], [1939], [1947], [1955], [1963], [1971], [1979], [1987], [1995], [2003], [2011], [2019], [2027], [2035], [2043], [2051], [2059], [2067], [2075], [2083], [2091], [2099], [2107], [2115], [2123], [2131], [2139], [2147], [2155], [2163], [2171], [2179], [2187], [2195], [2203], [2211], [2219], [2227], [2235], [2243], [2251], [2259], [2263], [2265], [2268], [2276], [2284], [2292], [2300], [2308], [2316], [2324], [2332], [2340], [2348], [2356], [2361], [2365], [2369], [2373], [2377], [2381], [2385], [2389], [2393], [2397], [2401], [2405], [2409], [2413], [2417], [2421], [2425], [2429], [2433], [2437], [2441], [2445], [2449], [2453], [2457], [2461], [2465], [2469], [2473], [2477], [2481], [2485], [2489], [2493], [2497], [2501], [2505], [2509], [2513], [2517], [2521], [2525], [2529], [2533], [2537], [2541], [2545], [2549], [2553], [2557], [2561], [2565], [2569], [2573], [2577], [2581], [2585], [2589], [2593], [2597], [2601], [2605], [2609], [2613], [2617], [2621], [2625], [2629], [2633], [2637], [2641], [2645], [2649], [2653], [2657], [2661], [2665], [2669], [2673], [2677], [2680], [3240], [3244], [3253], [3257], [3259], [3270], [3271], [3272], [3274], [3275] [2019-10-02 20:12:13,273 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 20:12:13,274 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 20:12:51,995 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation. [2019-10-02 20:13:26,529 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 20:13:26,532 INFO L272 AbstractInterpreter]: Visited 156 different actions 307 times. Merged at 4 different actions 5 times. Never widened. Performed 712 root evaluator evaluations with a maximum evaluation depth of 16. Performed 712 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Found 1 fixpoints after 1 different actions. Largest state had 26 variables. [2019-10-02 20:13:26,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 20:13:26,537 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 20:13:53,185 INFO L227 lantSequenceWeakener]: Weakened 207 states. On average, predicates are now at 75.77% of their original sizes. [2019-10-02 20:13:53,185 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 20:13:53,319 INFO L420 sIntCurrentIteration]: We unified 209 AI predicates to 209 [2019-10-02 20:13:53,320 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 20:13:53,320 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 20:13:53,320 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [14] imperfect sequences [4] total 16 [2019-10-02 20:13:53,321 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 20:13:53,321 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-02 20:13:53,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-02 20:13:53,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2019-10-02 20:13:53,322 INFO L87 Difference]: Start difference. First operand 27915 states and 35883 transitions. Second operand 14 states.