java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:21,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:21,302 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:21,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:21,315 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:21,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:21,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:21,320 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:21,322 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:21,322 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:21,323 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:21,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:21,325 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:21,326 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:21,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:21,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:21,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:21,330 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:21,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:21,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:21,336 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:21,337 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:21,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:21,339 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:21,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 00:04:21,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 00:04:21,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 00:04:21,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 00:04:21,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 00:04:21,347 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 00:04:21,347 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 00:04:21,351 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 00:04:21,352 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 00:04:21,353 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 00:04:21,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 00:04:21,359 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 00:04:21,360 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 00:04:21,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 00:04:21,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:21,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:21,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:21,365 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:04:21,380 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:21,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:21,383 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:21,383 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:21,384 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:21,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:21,384 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:21,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:21,385 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:21,385 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:21,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:21,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:21,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:21,387 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:21,388 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:21,388 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:21,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:21,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:21,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:21,389 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:21,389 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:21,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:21,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:21,390 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:04:21,710 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:21,728 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:21,732 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:21,734 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:21,735 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:21,736 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-15 00:04:21,804 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8321a92/ff1ce7e453ad4a88a41d7cb9b3a9308d/FLAG15b54cc6e [2019-10-15 00:04:22,632 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:22,635 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label12.c [2019-10-15 00:04:22,672 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8321a92/ff1ce7e453ad4a88a41d7cb9b3a9308d/FLAG15b54cc6e [2019-10-15 00:04:23,185 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8f8321a92/ff1ce7e453ad4a88a41d7cb9b3a9308d [2019-10-15 00:04:23,195 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:23,196 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:23,197 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:23,197 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:23,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:23,202 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:23" (1/1) ... [2019-10-15 00:04:23,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d60e989 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:23, skipping insertion in model container [2019-10-15 00:04:23,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:23" (1/1) ... [2019-10-15 00:04:23,215 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:23,361 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:24,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:24,863 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:25,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:25,540 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:25,541 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25 WrapperNode [2019-10-15 00:04:25,541 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:25,542 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:25,542 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:25,543 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:25,558 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,559 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... [2019-10-15 00:04:25,829 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:25,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:25,830 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:25,830 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:25,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:25,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:25,901 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:25,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:25,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:04:25,901 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:04:25,902 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:04:25,902 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:04:25,902 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:04:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:04:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:25,903 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:25,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:30,727 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:30,727 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:30,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:30 BoogieIcfgContainer [2019-10-15 00:04:30,730 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:30,731 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:30,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:30,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:30,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:23" (1/3) ... [2019-10-15 00:04:30,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4355eb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:30, skipping insertion in model container [2019-10-15 00:04:30,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:25" (2/3) ... [2019-10-15 00:04:30,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4355eb29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:30, skipping insertion in model container [2019-10-15 00:04:30,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:30" (3/3) ... [2019-10-15 00:04:30,741 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label12.c [2019-10-15 00:04:30,754 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:30,765 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:30,777 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:30,820 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:30,820 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:30,820 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:30,820 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:30,820 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:30,821 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:30,821 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:30,821 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:30,863 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-15 00:04:30,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-15 00:04:30,873 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:30,875 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:30,877 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:30,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:30,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1107355747, now seen corresponding path program 1 times [2019-10-15 00:04:30,892 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:30,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693270239] [2019-10-15 00:04:30,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:30,893 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:30,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:31,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:31,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693270239] [2019-10-15 00:04:31,307 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:31,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:31,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35073868] [2019-10-15 00:04:31,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:31,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:31,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:31,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:31,333 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-15 00:04:36,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:36,655 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-15 00:04:36,656 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:36,658 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2019-10-15 00:04:36,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:36,690 INFO L225 Difference]: With dead ends: 2443 [2019-10-15 00:04:36,690 INFO L226 Difference]: Without dead ends: 1542 [2019-10-15 00:04:36,702 INFO L600 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 [2019-10-15 00:04:36,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-15 00:04:36,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-15 00:04:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-15 00:04:36,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2750 transitions. [2019-10-15 00:04:36,843 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2750 transitions. Word has length 64 [2019-10-15 00:04:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:36,844 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2750 transitions. [2019-10-15 00:04:36,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:36,844 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2750 transitions. [2019-10-15 00:04:36,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:04:36,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:36,852 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:36,853 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:36,853 INFO L82 PathProgramCache]: Analyzing trace with hash -493202935, now seen corresponding path program 1 times [2019-10-15 00:04:36,854 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:36,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073385393] [2019-10-15 00:04:36,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,854 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:37,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073385393] [2019-10-15 00:04:37,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:37,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:04:37,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114157312] [2019-10-15 00:04:37,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:04:37,019 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:37,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:04:37,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:04:37,020 INFO L87 Difference]: Start difference. First operand 1542 states and 2750 transitions. Second operand 5 states. [2019-10-15 00:04:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:44,111 INFO L93 Difference]: Finished difference Result 4690 states and 8403 transitions. [2019-10-15 00:04:44,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:44,112 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 137 [2019-10-15 00:04:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:44,131 INFO L225 Difference]: With dead ends: 4690 [2019-10-15 00:04:44,131 INFO L226 Difference]: Without dead ends: 3154 [2019-10-15 00:04:44,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:04:44,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3154 states. [2019-10-15 00:04:44,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3154 to 3122. [2019-10-15 00:04:44,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3122 states. [2019-10-15 00:04:44,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3122 states to 3122 states and 5336 transitions. [2019-10-15 00:04:44,228 INFO L78 Accepts]: Start accepts. Automaton has 3122 states and 5336 transitions. Word has length 137 [2019-10-15 00:04:44,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:44,229 INFO L462 AbstractCegarLoop]: Abstraction has 3122 states and 5336 transitions. [2019-10-15 00:04:44,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:04:44,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3122 states and 5336 transitions. [2019-10-15 00:04:44,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-15 00:04:44,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:44,233 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:44,234 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:44,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:44,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1291094684, now seen corresponding path program 1 times [2019-10-15 00:04:44,235 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:44,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542512376] [2019-10-15 00:04:44,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:44,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:44,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:44,381 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:44,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542512376] [2019-10-15 00:04:44,382 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:44,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:44,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458710908] [2019-10-15 00:04:44,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:44,383 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:44,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:44,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:44,384 INFO L87 Difference]: Start difference. First operand 3122 states and 5336 transitions. Second operand 6 states. [2019-10-15 00:04:51,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:51,550 INFO L93 Difference]: Finished difference Result 9491 states and 16483 transitions. [2019-10-15 00:04:51,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:51,557 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 142 [2019-10-15 00:04:51,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:51,593 INFO L225 Difference]: With dead ends: 9491 [2019-10-15 00:04:51,593 INFO L226 Difference]: Without dead ends: 6375 [2019-10-15 00:04:51,601 INFO L600 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 [2019-10-15 00:04:51,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2019-10-15 00:04:51,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6333. [2019-10-15 00:04:51,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6333 states. [2019-10-15 00:04:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6333 states to 6333 states and 10771 transitions. [2019-10-15 00:04:51,777 INFO L78 Accepts]: Start accepts. Automaton has 6333 states and 10771 transitions. Word has length 142 [2019-10-15 00:04:51,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:51,778 INFO L462 AbstractCegarLoop]: Abstraction has 6333 states and 10771 transitions. [2019-10-15 00:04:51,778 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:51,779 INFO L276 IsEmpty]: Start isEmpty. Operand 6333 states and 10771 transitions. [2019-10-15 00:04:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-15 00:04:51,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:51,783 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:51,784 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1777138644, now seen corresponding path program 1 times [2019-10-15 00:04:51,786 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:51,786 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425835401] [2019-10-15 00:04:51,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:51,787 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:51,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:51,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:52,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425835401] [2019-10-15 00:04:52,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:52,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:52,031 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805740281] [2019-10-15 00:04:52,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:52,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:52,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:52,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:52,034 INFO L87 Difference]: Start difference. First operand 6333 states and 10771 transitions. Second operand 6 states. [2019-10-15 00:04:58,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:58,052 INFO L93 Difference]: Finished difference Result 15980 states and 27530 transitions. [2019-10-15 00:04:58,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:58,053 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 150 [2019-10-15 00:04:58,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:58,095 INFO L225 Difference]: With dead ends: 15980 [2019-10-15 00:04:58,096 INFO L226 Difference]: Without dead ends: 9653 [2019-10-15 00:04:58,112 INFO L600 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 [2019-10-15 00:04:58,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9653 states. [2019-10-15 00:04:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9653 to 9576. [2019-10-15 00:04:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9576 states. [2019-10-15 00:04:58,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 15604 transitions. [2019-10-15 00:04:58,317 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 15604 transitions. Word has length 150 [2019-10-15 00:04:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:58,319 INFO L462 AbstractCegarLoop]: Abstraction has 9576 states and 15604 transitions. [2019-10-15 00:04:58,319 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 15604 transitions. [2019-10-15 00:04:58,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2019-10-15 00:04:58,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:58,325 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:58,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:58,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:58,325 INFO L82 PathProgramCache]: Analyzing trace with hash -124269619, now seen corresponding path program 1 times [2019-10-15 00:04:58,326 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:58,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601344484] [2019-10-15 00:04:58,326 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,327 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:58,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:58,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:58,563 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:58,563 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601344484] [2019-10-15 00:04:58,564 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:58,564 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:58,564 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949036555] [2019-10-15 00:04:58,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:58,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:58,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:58,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:58,566 INFO L87 Difference]: Start difference. First operand 9576 states and 15604 transitions. Second operand 6 states.