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/Problem18_label53.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 22:45:42,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 22:45:42,870 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 22:45:42,882 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 22:45:42,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 22:45:42,883 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 22:45:42,885 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 22:45:42,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 22:45:42,888 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 22:45:42,889 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 22:45:42,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 22:45:42,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 22:45:42,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 22:45:42,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 22:45:42,893 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 22:45:42,895 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 22:45:42,895 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 22:45:42,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 22:45:42,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 22:45:42,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 22:45:42,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 22:45:42,903 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 22:45:42,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 22:45:42,905 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 22:45:42,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 22:45:42,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 22:45:42,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 22:45:42,913 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 22:45:42,914 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 22:45:42,915 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 22:45:42,915 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 22:45:42,916 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 22:45:42,916 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 22:45:42,916 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 22:45:42,917 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 22:45:42,918 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 22:45:42,918 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 [2019-09-09 22:45:42,938 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 22:45:42,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 22:45:42,939 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 22:45:42,939 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 22:45:42,940 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 22:45:42,940 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 22:45:42,940 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 22:45:42,940 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 22:45:42,941 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 22:45:42,941 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 22:45:42,942 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 22:45:42,942 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 22:45:42,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 22:45:42,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 22:45:42,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 22:45:42,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 22:45:42,943 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 22:45:42,943 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 22:45:42,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 22:45:42,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 22:45:42,944 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 22:45:42,944 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 22:45:42,944 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 22:45:42,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 22:45:42,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 22:45:42,945 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 22:45:42,945 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 22:45:42,945 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 22:45:42,945 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 22:45:42,945 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 22:45:42,975 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 22:45:42,987 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 22:45:42,991 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 22:45:42,992 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 22:45:42,993 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 22:45:42,993 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label53.c [2019-09-09 22:45:43,051 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e6b6637/0e05ef20264840c9a7d01006473b17c3/FLAGd1c796647 [2019-09-09 22:45:43,839 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 22:45:43,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label53.c [2019-09-09 22:45:43,868 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e6b6637/0e05ef20264840c9a7d01006473b17c3/FLAGd1c796647 [2019-09-09 22:45:44,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83e6b6637/0e05ef20264840c9a7d01006473b17c3 [2019-09-09 22:45:44,391 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 22:45:44,392 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 22:45:44,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 22:45:44,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 22:45:44,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 22:45:44,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:45:44" (1/1) ... [2019-09-09 22:45:44,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b4b40c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:44, skipping insertion in model container [2019-09-09 22:45:44,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 10:45:44" (1/1) ... [2019-09-09 22:45:44,415 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 22:45:44,596 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 22:45:45,760 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:45:45,771 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 22:45:46,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 22:45:46,335 INFO L192 MainTranslator]: Completed translation [2019-09-09 22:45:46,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46 WrapperNode [2019-09-09 22:45:46,336 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 22:45:46,337 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 22:45:46,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 22:45:46,338 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 22:45:46,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,411 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,411 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,552 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,620 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (1/1) ... [2019-09-09 22:45:46,652 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 22:45:46,652 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 22:45:46,653 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 22:45:46,653 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 22:45:46,654 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (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 [2019-09-09 22:45:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 22:45:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 22:45:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 22:45:46,731 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 22:45:46,732 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 22:45:46,732 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 22:45:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 22:45:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 22:45:46,732 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 22:45:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 22:45:46,733 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 22:45:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 22:45:46,734 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 22:45:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 22:45:46,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 22:45:50,452 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 22:45:50,452 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 22:45:50,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:45:50 BoogieIcfgContainer [2019-09-09 22:45:50,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 22:45:50,455 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 22:45:50,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 22:45:50,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 22:45:50,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 10:45:44" (1/3) ... [2019-09-09 22:45:50,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d483a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:45:50, skipping insertion in model container [2019-09-09 22:45:50,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 10:45:46" (2/3) ... [2019-09-09 22:45:50,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20d483a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 10:45:50, skipping insertion in model container [2019-09-09 22:45:50,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 10:45:50" (3/3) ... [2019-09-09 22:45:50,465 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label53.c [2019-09-09 22:45:50,477 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 22:45:50,490 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 22:45:50,510 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 22:45:50,547 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 22:45:50,547 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 22:45:50,547 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 22:45:50,547 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 22:45:50,547 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 22:45:50,548 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 22:45:50,548 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 22:45:50,548 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 22:45:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-09-09 22:45:50,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-09 22:45:50,613 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:50,615 INFO L399 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] [2019-09-09 22:45:50,617 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:50,622 INFO L82 PathProgramCache]: Analyzing trace with hash -954774470, now seen corresponding path program 1 times [2019-09-09 22:45:50,625 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:50,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:50,682 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:50,682 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:50,683 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:50,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:51,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:45:51,056 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:51,056 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 22:45:51,057 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:51,062 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 22:45:51,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 22:45:51,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:45:51,080 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-09-09 22:45:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:45:55,725 INFO L93 Difference]: Finished difference Result 1480 states and 2667 transitions. [2019-09-09 22:45:55,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 22:45:55,731 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-09-09 22:45:55,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:45:55,764 INFO L225 Difference]: With dead ends: 1480 [2019-09-09 22:45:55,765 INFO L226 Difference]: Without dead ends: 1412 [2019-09-09 22:45:55,766 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 22:45:55,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-09-09 22:45:55,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-09-09 22:45:55,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-09-09 22:45:55,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2558 transitions. [2019-09-09 22:45:55,913 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2558 transitions. Word has length 39 [2019-09-09 22:45:55,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:45:55,914 INFO L475 AbstractCegarLoop]: Abstraction has 1412 states and 2558 transitions. [2019-09-09 22:45:55,914 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 22:45:55,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2558 transitions. [2019-09-09 22:45:55,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-09 22:45:55,920 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:45:55,920 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:45:55,920 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:45:55,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:45:55,921 INFO L82 PathProgramCache]: Analyzing trace with hash 153462434, now seen corresponding path program 1 times [2019-09-09 22:45:55,921 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:45:55,922 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:55,923 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:45:55,923 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:45:55,923 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:45:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:45:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:45:56,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:45:56,185 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:45:56,185 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:45:56,187 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:45:56,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:45:56,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:45:56,189 INFO L87 Difference]: Start difference. First operand 1412 states and 2558 transitions. Second operand 6 states. [2019-09-09 22:46:01,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:46:01,714 INFO L93 Difference]: Finished difference Result 2885 states and 4869 transitions. [2019-09-09 22:46:01,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:46:01,715 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 127 [2019-09-09 22:46:01,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:46:01,732 INFO L225 Difference]: With dead ends: 2885 [2019-09-09 22:46:01,732 INFO L226 Difference]: Without dead ends: 2885 [2019-09-09 22:46:01,733 INFO L628 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 [2019-09-09 22:46:01,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2885 states. [2019-09-09 22:46:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2885 to 2864. [2019-09-09 22:46:01,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-09-09 22:46:01,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4821 transitions. [2019-09-09 22:46:01,811 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4821 transitions. Word has length 127 [2019-09-09 22:46:01,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:46:01,812 INFO L475 AbstractCegarLoop]: Abstraction has 2864 states and 4821 transitions. [2019-09-09 22:46:01,812 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:46:01,812 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4821 transitions. [2019-09-09 22:46:01,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-09-09 22:46:01,817 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:46:01,817 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:46:01,818 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:46:01,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:46:01,818 INFO L82 PathProgramCache]: Analyzing trace with hash 934765987, now seen corresponding path program 1 times [2019-09-09 22:46:01,818 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:46:01,819 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:01,820 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:46:01,820 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:01,820 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:46:01,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:46:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:46:02,073 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:46:02,073 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:46:02,073 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:46:02,074 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:46:02,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:46:02,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:46:02,075 INFO L87 Difference]: Start difference. First operand 2864 states and 4821 transitions. Second operand 6 states. [2019-09-09 22:46:09,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:46:09,115 INFO L93 Difference]: Finished difference Result 5830 states and 9946 transitions. [2019-09-09 22:46:09,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:46:09,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 174 [2019-09-09 22:46:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:46:09,154 INFO L225 Difference]: With dead ends: 5830 [2019-09-09 22:46:09,155 INFO L226 Difference]: Without dead ends: 5830 [2019-09-09 22:46:09,156 INFO L628 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 [2019-09-09 22:46:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5830 states. [2019-09-09 22:46:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5830 to 5770. [2019-09-09 22:46:09,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5770 states. [2019-09-09 22:46:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5770 states to 5770 states and 9726 transitions. [2019-09-09 22:46:09,327 INFO L78 Accepts]: Start accepts. Automaton has 5770 states and 9726 transitions. Word has length 174 [2019-09-09 22:46:09,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:46:09,328 INFO L475 AbstractCegarLoop]: Abstraction has 5770 states and 9726 transitions. [2019-09-09 22:46:09,328 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:46:09,329 INFO L276 IsEmpty]: Start isEmpty. Operand 5770 states and 9726 transitions. [2019-09-09 22:46:09,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2019-09-09 22:46:09,332 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:46:09,333 INFO L399 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:46:09,333 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:46:09,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:46:09,333 INFO L82 PathProgramCache]: Analyzing trace with hash 761184135, now seen corresponding path program 1 times [2019-09-09 22:46:09,334 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:46:09,334 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:09,335 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:46:09,335 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:09,335 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:46:09,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:46:09,517 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 22:46:09,518 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:46:09,518 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 22:46:09,518 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:46:09,519 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 22:46:09,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 22:46:09,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 22:46:09,520 INFO L87 Difference]: Start difference. First operand 5770 states and 9726 transitions. Second operand 6 states. [2019-09-09 22:46:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:46:14,650 INFO L93 Difference]: Finished difference Result 8015 states and 11489 transitions. [2019-09-09 22:46:14,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 22:46:14,651 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 176 [2019-09-09 22:46:14,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:46:14,684 INFO L225 Difference]: With dead ends: 8015 [2019-09-09 22:46:14,684 INFO L226 Difference]: Without dead ends: 8015 [2019-09-09 22:46:14,685 INFO L628 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 [2019-09-09 22:46:14,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8015 states. [2019-09-09 22:46:14,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8015 to 7976. [2019-09-09 22:46:14,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7976 states. [2019-09-09 22:46:14,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 11297 transitions. [2019-09-09 22:46:14,849 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 11297 transitions. Word has length 176 [2019-09-09 22:46:14,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:46:14,850 INFO L475 AbstractCegarLoop]: Abstraction has 7976 states and 11297 transitions. [2019-09-09 22:46:14,850 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 22:46:14,850 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 11297 transitions. [2019-09-09 22:46:14,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-09-09 22:46:14,855 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:46:14,855 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-09-09 22:46:14,855 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:46:14,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:46:14,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1063596238, now seen corresponding path program 1 times [2019-09-09 22:46:14,856 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:46:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:14,857 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:46:14,857 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:14,857 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:46:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:46:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-09-09 22:46:15,032 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 22:46:15,032 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 22:46:15,032 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:46:15,033 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 22:46:15,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 22:46:15,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 22:46:15,034 INFO L87 Difference]: Start difference. First operand 7976 states and 11297 transitions. Second operand 4 states. [2019-09-09 22:46:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 22:46:21,983 INFO L93 Difference]: Finished difference Result 15864 states and 21949 transitions. [2019-09-09 22:46:21,984 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 22:46:21,984 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 233 [2019-09-09 22:46:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 22:46:22,047 INFO L225 Difference]: With dead ends: 15864 [2019-09-09 22:46:22,048 INFO L226 Difference]: Without dead ends: 15864 [2019-09-09 22:46:22,048 INFO L628 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 [2019-09-09 22:46:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15864 states. [2019-09-09 22:46:22,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15864 to 15864. [2019-09-09 22:46:22,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15864 states. [2019-09-09 22:46:22,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15864 states to 15864 states and 21949 transitions. [2019-09-09 22:46:22,382 INFO L78 Accepts]: Start accepts. Automaton has 15864 states and 21949 transitions. Word has length 233 [2019-09-09 22:46:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 22:46:22,383 INFO L475 AbstractCegarLoop]: Abstraction has 15864 states and 21949 transitions. [2019-09-09 22:46:22,383 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 22:46:22,383 INFO L276 IsEmpty]: Start isEmpty. Operand 15864 states and 21949 transitions. [2019-09-09 22:46:22,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2019-09-09 22:46:22,402 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 22:46:22,403 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 22:46:22,404 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 22:46:22,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:46:22,404 INFO L82 PathProgramCache]: Analyzing trace with hash -6559082, now seen corresponding path program 1 times [2019-09-09 22:46:22,405 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 22:46:22,406 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:22,406 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 22:46:22,407 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 22:46:22,407 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 22:46:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 22:46:22,683 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 64 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 22:46:22,683 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 22:46:22,683 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 22:46:22,685 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 388 with the following transitions: [2019-09-09 22:46:22,687 INFO L207 CegarAbsIntRunner]: [0], [1], [1624], [1631], [1639], [1647], [1655], [1663], [1671], [1679], [1687], [1695], [1703], [1711], [1719], [1727], [1735], [1743], [1751], [1759], [1767], [1775], [1783], [1791], [1799], [1807], [1815], [1823], [1831], [1839], [1843], [1845], [1848], [1856], [1864], [1872], [1880], [1888], [1896], [1904], [1912], [1920], [1928], [1936], [1944], [1952], [1960], [1968], [1976], [1984], [1992], [2000], [2008], [2016], [2024], [2032], [2040], [2048], [2056], [2064], [2072], [2080], [2088], [2096], [2104], [2112], [2117], [2121], [2124], [2125], [2129], [2133], [2137], [2141], [2145], [2149], [2153], [2157], [2161], [2165], [2169], [2173], [2177], [2181], [2185], [2189], [2193], [2197], [2201], [2205], [2209], [2213], [2217], [2221], [2225], [2229], [2233], [2237], [2241], [2245], [2249], [2253], [2257], [2261], [2265], [2269], [2273], [2277], [2281], [2285], [2289], [2293], [2297], [2301], [2305], [2309], [2313], [2317], [2321], [2325], [2329], [2333], [2337], [2341], [2345], [2349], [2353], [2357], [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], [2681], [2685], [2689], [2693], [2697], [2701], [2705], [2709], [2713], [2717], [2721], [2725], [2729], [2733], [2737], [2741], [2745], [2749], [2753], [2757], [2761], [2765], [2769], [2773], [2777], [2781], [2785], [2789], [2793], [2797], [2801], [2805], [2809], [2813], [2817], [2821], [2825], [2829], [2833], [2837], [2841], [2845], [2849], [2853], [2857], [2861], [2865], [2869], [2873], [2877], [2881], [2885], [2889], [2893], [2897], [2901], [2905], [2909], [2913], [2917], [2921], [2925], [2929], [2933], [2937], [2941], [2945], [2948], [2996], [3000], [3009], [3013], [3015], [3024], [3025], [3026], [3028], [3029] [2019-09-09 22:46:22,755 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 22:46:22,756 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 22:46:40,209 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 22:46:40,211 INFO L272 AbstractInterpreter]: Visited 282 different actions 282 times. Never merged. Never widened. Performed 512 root evaluator evaluations with a maximum evaluation depth of 14. Performed 512 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-09-09 22:46:40,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 22:46:40,215 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 22:46:53,262 INFO L227 lantSequenceWeakener]: Weakened 368 states. On average, predicates are now at 77.61% of their original sizes. [2019-09-09 22:46:53,262 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 22:46:53,372 INFO L420 sIntCurrentIteration]: We unified 386 AI predicates to 386 [2019-09-09 22:46:53,372 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 22:46:53,373 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 22:46:53,373 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2019-09-09 22:46:53,376 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 22:46:53,377 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-09 22:46:53,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-09 22:46:53,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-09-09 22:46:53,378 INFO L87 Difference]: Start difference. First operand 15864 states and 21949 transitions. Second operand 11 states. [2019-09-09 22:48:26,215 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.