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/Problem13_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 17:55:40,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 17:55:40,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 17:55:40,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-09 17:55:41,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-09 17:55:41,001 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-09 17:55:41,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-09 17:55:41,004 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-09 17:55:41,006 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-09 17:55:41,007 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-09 17:55:41,008 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-09 17:55:41,009 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-09 17:55:41,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-09 17:55:41,010 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-09 17:55:41,011 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-09 17:55:41,012 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-09 17:55:41,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-09 17:55:41,014 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-09 17:55:41,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-09 17:55:41,017 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-09 17:55:41,019 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-09 17:55:41,020 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-09 17:55:41,021 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-09 17:55:41,022 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-09 17:55:41,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-09 17:55:41,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-09 17:55:41,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-09 17:55:41,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-09 17:55:41,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-09 17:55:41,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-09 17:55:41,031 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-09 17:55:41,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-09 17:55:41,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-09 17:55:41,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-09 17:55:41,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-09 17:55:41,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-09 17:55:41,034 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 17:55:41,049 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 17:55:41,050 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 17:55:41,050 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 17:55:41,050 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 17:55:41,051 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 17:55:41,051 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 17:55:41,051 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 17:55:41,052 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 17:55:41,052 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 17:55:41,052 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 17:55:41,053 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 17:55:41,053 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 17:55:41,053 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 17:55:41,053 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 17:55:41,053 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 17:55:41,054 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 17:55:41,054 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 17:55:41,054 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 17:55:41,054 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 17:55:41,055 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 17:55:41,055 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 17:55:41,055 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 17:55:41,055 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 17:55:41,055 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 17:55:41,056 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 17:55:41,056 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 17:55:41,056 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 17:55:41,056 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 17:55:41,057 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 17:55:41,057 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 17:55:41,091 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 17:55:41,104 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 17:55:41,107 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 17:55:41,109 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 17:55:41,109 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 17:55:41,110 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label59.c [2019-09-09 17:55:41,181 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704370731/09a04c0925164cb8b0ec5f540430a6e0/FLAG18d19c1e8 [2019-09-09 17:55:42,006 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 17:55:42,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label59.c [2019-09-09 17:55:42,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704370731/09a04c0925164cb8b0ec5f540430a6e0/FLAG18d19c1e8 [2019-09-09 17:55:42,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/704370731/09a04c0925164cb8b0ec5f540430a6e0 [2019-09-09 17:55:42,540 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 17:55:42,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 17:55:42,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 17:55:42,543 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 17:55:42,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 17:55:42,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:55:42" (1/1) ... [2019-09-09 17:55:42,551 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bf17031 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:42, skipping insertion in model container [2019-09-09 17:55:42,551 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 05:55:42" (1/1) ... [2019-09-09 17:55:42,559 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 17:55:42,746 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 17:55:44,382 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:55:44,389 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 17:55:45,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 17:55:45,166 INFO L192 MainTranslator]: Completed translation [2019-09-09 17:55:45,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45 WrapperNode [2019-09-09 17:55:45,167 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 17:55:45,168 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 17:55:45,168 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 17:55:45,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 17:55:45,182 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,184 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,266 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,266 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,478 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (1/1) ... [2019-09-09 17:55:45,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 17:55:45,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 17:55:45,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 17:55:45,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 17:55:45,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (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 17:55:45,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 17:55:45,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 17:55:45,583 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 17:55:45,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-09-09 17:55:45,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-09-09 17:55:45,584 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-09-09 17:55:45,585 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 17:55:45,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 17:55:45,586 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-09-09 17:55:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-09-09 17:55:45,587 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-09-09 17:55:45,588 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 17:55:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 17:55:45,589 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 17:55:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 17:55:45,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 17:55:45,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 17:55:52,145 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 17:55:52,149 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 17:55:52,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:55:52 BoogieIcfgContainer [2019-09-09 17:55:52,152 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 17:55:52,153 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 17:55:52,153 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 17:55:52,156 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 17:55:52,157 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 05:55:42" (1/3) ... [2019-09-09 17:55:52,157 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f963d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:55:52, skipping insertion in model container [2019-09-09 17:55:52,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 05:55:45" (2/3) ... [2019-09-09 17:55:52,158 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f963d33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 05:55:52, skipping insertion in model container [2019-09-09 17:55:52,158 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 05:55:52" (3/3) ... [2019-09-09 17:55:52,160 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2019-09-09 17:55:52,170 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 17:55:52,179 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 17:55:52,196 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 17:55:52,224 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 17:55:52,224 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 17:55:52,224 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 17:55:52,224 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 17:55:52,224 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 17:55:52,225 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 17:55:52,225 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 17:55:52,225 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 17:55:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-09-09 17:55:52,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-09 17:55:52,279 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:55:52,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-09 17:55:52,282 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:55:52,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:55:52,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1177685569, now seen corresponding path program 1 times [2019-09-09 17:55:52,291 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:55:52,340 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:55:52,340 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:55:52,341 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:55:52,341 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:55:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:55:52,664 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 17:55:52,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:55:52,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:55:52,667 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:55:52,673 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:55:52,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:55:52,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:55:52,691 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-09-09 17:56:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:02,959 INFO L93 Difference]: Finished difference Result 2948 states and 5337 transitions. [2019-09-09 17:56:02,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:56:02,965 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 52 [2019-09-09 17:56:02,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:03,009 INFO L225 Difference]: With dead ends: 2948 [2019-09-09 17:56:03,009 INFO L226 Difference]: Without dead ends: 2861 [2019-09-09 17:56:03,011 INFO L628 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 [2019-09-09 17:56:03,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2019-09-09 17:56:03,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 1910. [2019-09-09 17:56:03,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1910 states. [2019-09-09 17:56:03,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3427 transitions. [2019-09-09 17:56:03,174 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3427 transitions. Word has length 52 [2019-09-09 17:56:03,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:03,177 INFO L475 AbstractCegarLoop]: Abstraction has 1910 states and 3427 transitions. [2019-09-09 17:56:03,177 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:56:03,177 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3427 transitions. [2019-09-09 17:56:03,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-09 17:56:03,190 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:03,190 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, 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] [2019-09-09 17:56:03,191 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:03,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:03,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1161124686, now seen corresponding path program 1 times [2019-09-09 17:56:03,192 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:03,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:03,194 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:03,194 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:03,194 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:03,406 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:56:03,406 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:56:03,407 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 17:56:03,407 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:56:03,409 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 17:56:03,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 17:56:03,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 17:56:03,410 INFO L87 Difference]: Start difference. First operand 1910 states and 3427 transitions. Second operand 6 states. [2019-09-09 17:56:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:10,928 INFO L93 Difference]: Finished difference Result 3633 states and 5972 transitions. [2019-09-09 17:56:10,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 17:56:10,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 124 [2019-09-09 17:56:10,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:10,953 INFO L225 Difference]: With dead ends: 3633 [2019-09-09 17:56:10,954 INFO L226 Difference]: Without dead ends: 3633 [2019-09-09 17:56:10,955 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 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 17:56:10,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3633 states. [2019-09-09 17:56:11,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3633 to 3606. [2019-09-09 17:56:11,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3606 states. [2019-09-09 17:56:11,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5913 transitions. [2019-09-09 17:56:11,083 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5913 transitions. Word has length 124 [2019-09-09 17:56:11,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:11,085 INFO L475 AbstractCegarLoop]: Abstraction has 3606 states and 5913 transitions. [2019-09-09 17:56:11,085 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 17:56:11,086 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5913 transitions. [2019-09-09 17:56:11,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-09 17:56:11,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:11,092 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, 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] [2019-09-09 17:56:11,092 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:11,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:11,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1164967785, now seen corresponding path program 1 times [2019-09-09 17:56:11,093 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:11,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:11,095 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:11,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:11,095 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:11,300 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:56:11,301 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:56:11,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:56:11,301 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:56:11,303 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:56:11,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:56:11,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:56:11,304 INFO L87 Difference]: Start difference. First operand 3606 states and 5913 transitions. Second operand 5 states. [2019-09-09 17:56:20,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:20,178 INFO L93 Difference]: Finished difference Result 7294 states and 11260 transitions. [2019-09-09 17:56:20,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:56:20,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 150 [2019-09-09 17:56:20,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:20,225 INFO L225 Difference]: With dead ends: 7294 [2019-09-09 17:56:20,226 INFO L226 Difference]: Without dead ends: 7294 [2019-09-09 17:56:20,235 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:56:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7294 states. [2019-09-09 17:56:20,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7294 to 7096. [2019-09-09 17:56:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7096 states. [2019-09-09 17:56:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7096 states to 7096 states and 10799 transitions. [2019-09-09 17:56:20,475 INFO L78 Accepts]: Start accepts. Automaton has 7096 states and 10799 transitions. Word has length 150 [2019-09-09 17:56:20,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:20,476 INFO L475 AbstractCegarLoop]: Abstraction has 7096 states and 10799 transitions. [2019-09-09 17:56:20,478 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:56:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 7096 states and 10799 transitions. [2019-09-09 17:56:20,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-09-09 17:56:20,482 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:20,482 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, 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] [2019-09-09 17:56:20,482 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash -745696321, now seen corresponding path program 1 times [2019-09-09 17:56:20,483 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:20,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:20,485 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:20,485 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:20,485 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:20,672 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:56:20,672 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:56:20,673 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-09 17:56:20,673 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:56:20,674 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-09 17:56:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-09 17:56:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-09 17:56:20,675 INFO L87 Difference]: Start difference. First operand 7096 states and 10799 transitions. Second operand 5 states. [2019-09-09 17:56:31,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:31,087 INFO L93 Difference]: Finished difference Result 14397 states and 22094 transitions. [2019-09-09 17:56:31,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-09 17:56:31,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-09-09 17:56:31,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:31,164 INFO L225 Difference]: With dead ends: 14397 [2019-09-09 17:56:31,164 INFO L226 Difference]: Without dead ends: 14397 [2019-09-09 17:56:31,165 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:56:31,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14397 states. [2019-09-09 17:56:31,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14397 to 14161. [2019-09-09 17:56:31,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14161 states. [2019-09-09 17:56:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14161 states to 14161 states and 21544 transitions. [2019-09-09 17:56:31,523 INFO L78 Accepts]: Start accepts. Automaton has 14161 states and 21544 transitions. Word has length 157 [2019-09-09 17:56:31,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:31,525 INFO L475 AbstractCegarLoop]: Abstraction has 14161 states and 21544 transitions. [2019-09-09 17:56:31,525 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-09 17:56:31,525 INFO L276 IsEmpty]: Start isEmpty. Operand 14161 states and 21544 transitions. [2019-09-09 17:56:31,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-09 17:56:31,528 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:31,528 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, 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] [2019-09-09 17:56:31,528 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:31,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:31,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1874242283, now seen corresponding path program 1 times [2019-09-09 17:56:31,529 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:31,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:31,530 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:31,530 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:31,530 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:56:31,646 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:56:31,647 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 17:56:31,647 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:56:31,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 17:56:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 17:56:31,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 17:56:31,648 INFO L87 Difference]: Start difference. First operand 14161 states and 21544 transitions. Second operand 3 states. [2019-09-09 17:56:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:36,532 INFO L93 Difference]: Finished difference Result 14163 states and 19190 transitions. [2019-09-09 17:56:36,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 17:56:36,533 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2019-09-09 17:56:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:36,583 INFO L225 Difference]: With dead ends: 14163 [2019-09-09 17:56:36,583 INFO L226 Difference]: Without dead ends: 14163 [2019-09-09 17:56:36,584 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 17:56:36,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14163 states. [2019-09-09 17:56:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14163 to 14161. [2019-09-09 17:56:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14161 states. [2019-09-09 17:56:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14161 states to 14161 states and 19186 transitions. [2019-09-09 17:56:36,854 INFO L78 Accepts]: Start accepts. Automaton has 14161 states and 19186 transitions. Word has length 167 [2019-09-09 17:56:36,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:36,856 INFO L475 AbstractCegarLoop]: Abstraction has 14161 states and 19186 transitions. [2019-09-09 17:56:36,856 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 17:56:36,856 INFO L276 IsEmpty]: Start isEmpty. Operand 14161 states and 19186 transitions. [2019-09-09 17:56:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-09 17:56:36,859 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:36,860 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, 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] [2019-09-09 17:56:36,860 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash 14355055, now seen corresponding path program 1 times [2019-09-09 17:56:36,861 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:36,864 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:36,864 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:36,864 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:36,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:37,019 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 17:56:37,020 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 17:56:37,020 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-09-09 17:56:37,020 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:56:37,021 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-09 17:56:37,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-09 17:56:37,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-09 17:56:37,022 INFO L87 Difference]: Start difference. First operand 14161 states and 19186 transitions. Second operand 4 states. [2019-09-09 17:56:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 17:56:46,797 INFO L93 Difference]: Finished difference Result 35555 states and 48657 transitions. [2019-09-09 17:56:46,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-09 17:56:46,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 172 [2019-09-09 17:56:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 17:56:46,953 INFO L225 Difference]: With dead ends: 35555 [2019-09-09 17:56:46,954 INFO L226 Difference]: Without dead ends: 35555 [2019-09-09 17:56:46,954 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 17:56:46,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35555 states. [2019-09-09 17:56:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35555 to 33931. [2019-09-09 17:56:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33931 states. [2019-09-09 17:56:47,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33931 states to 33931 states and 46494 transitions. [2019-09-09 17:56:47,631 INFO L78 Accepts]: Start accepts. Automaton has 33931 states and 46494 transitions. Word has length 172 [2019-09-09 17:56:47,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 17:56:47,632 INFO L475 AbstractCegarLoop]: Abstraction has 33931 states and 46494 transitions. [2019-09-09 17:56:47,632 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-09 17:56:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 33931 states and 46494 transitions. [2019-09-09 17:56:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2019-09-09 17:56:47,643 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 17:56:47,647 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:56:47,648 INFO L418 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 17:56:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:56:47,649 INFO L82 PathProgramCache]: Analyzing trace with hash -551266579, now seen corresponding path program 1 times [2019-09-09 17:56:47,650 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 17:56:47,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:47,651 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 17:56:47,651 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 17:56:47,651 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 17:56:47,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 17:56:47,868 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 90 proven. 73 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-09-09 17:56:47,869 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 17:56:47,869 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 17:56:47,870 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 249 with the following transitions: [2019-09-09 17:56:47,873 INFO L207 CegarAbsIntRunner]: [0], [1], [2628], [2635], [2643], [2651], [2659], [2667], [2675], [2683], [2691], [2699], [2707], [2715], [2723], [2731], [2739], [2747], [2755], [2763], [2771], [2779], [2787], [2795], [2803], [2811], [2819], [2827], [2835], [2843], [2851], [2859], [2867], [2875], [2883], [2891], [2899], [2907], [2915], [2923], [2931], [2939], [2947], [2951], [2953], [2956], [2964], [2972], [2980], [2988], [2996], [3004], [3012], [3020], [3028], [3036], [3044], [3052], [3060], [3068], [3076], [3084], [3092], [3100], [3108], [3116], [3121], [3125], [3129], [3133], [3137], [3148], [3152], [3156], [3159], [3160], [3164], [3168], [3179], [3183], [3187], [3191], [3195], [3199], [3203], [3207], [3218], [3222], [3226], [3230], [3234], [3238], [3242], [3246], [3250], [3254], [3258], [3262], [3266], [3270], [3274], [3278], [3282], [3286], [3290], [3294], [3305], [3309], [3313], [3317], [3321], [3325], [3329], [3333], [3344], [3347], [3352], [3354], [4238], [4242], [4251], [4255], [4257], [4268], [4269], [4270], [4272], [4273] [2019-09-09 17:56:47,955 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 17:56:47,955 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-09-09 17:57:59,369 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-09-09 17:57:59,371 INFO L272 AbstractInterpreter]: Visited 122 different actions 122 times. Never merged. Never widened. Performed 163 root evaluator evaluations with a maximum evaluation depth of 17. Performed 163 inverse root evaluator evaluations with a maximum inverse evaluation depth of 17. Never found a fixpoint. Largest state had 26 variables. [2019-09-09 17:57:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 17:57:59,375 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-09-09 17:59:07,396 INFO L227 lantSequenceWeakener]: Weakened 237 states. On average, predicates are now at 71.26% of their original sizes. [2019-09-09 17:59:07,397 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-09-09 17:59:07,441 INFO L420 sIntCurrentIteration]: We unified 247 AI predicates to 247 [2019-09-09 17:59:07,441 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-09-09 17:59:07,442 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-09 17:59:07,442 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [8] imperfect sequences [6] total 12 [2019-09-09 17:59:07,442 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 17:59:07,443 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-09 17:59:07,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-09 17:59:07,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-09-09 17:59:07,444 INFO L87 Difference]: Start difference. First operand 33931 states and 46494 transitions. Second operand 8 states. [2019-09-09 18:02:41,880 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.