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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 20:05:35,652 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 20:05:35,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 20:05:35,674 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 20:05:35,675 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 20:05:35,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 20:05:35,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 20:05:35,689 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 20:05:35,694 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 20:05:35,698 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 20:05:35,699 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 20:05:35,701 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 20:05:35,701 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 20:05:35,703 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 20:05:35,706 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 20:05:35,707 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 20:05:35,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 20:05:35,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 20:05:35,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 20:05:35,717 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 20:05:35,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 20:05:35,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 20:05:35,727 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 20:05:35,728 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 20:05:35,730 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 20:05:35,730 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 20:05:35,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 20:05:35,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 20:05:35,734 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 20:05:35,735 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 20:05:35,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 20:05:35,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 20:05:35,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 20:05:35,738 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 20:05:35,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 20:05:35,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 20:05:35,741 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 20:05:35,741 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 20:05:35,741 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 20:05:35,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 20:05:35,744 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 20:05:35,745 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 [2019-10-13 20:05:35,769 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 20:05:35,770 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 20:05:35,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 20:05:35,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 20:05:35,774 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 20:05:35,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 20:05:35,775 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 20:05:35,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 20:05:35,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 20:05:35,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 20:05:35,776 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 20:05:35,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 20:05:35,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 20:05:35,777 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 20:05:35,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 20:05:35,777 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 20:05:35,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 20:05:35,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 20:05:35,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 20:05:35,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 20:05:35,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 20:05:35,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 20:05:35,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 20:05:35,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 20:05:35,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 20:05:35,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 20:05:35,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 20:05:35,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 20:05:35,785 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 [2019-10-13 20:05:36,088 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 20:05:36,113 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 20:05:36,117 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 20:05:36,119 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 20:05:36,119 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 20:05:36,120 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-13 20:05:36,199 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff85a11f/3918bf6bcb514a47948211b569a44d57/FLAGbb1d18df6 [2019-10-13 20:05:36,981 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 20:05:36,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-13 20:05:37,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff85a11f/3918bf6bcb514a47948211b569a44d57/FLAGbb1d18df6 [2019-10-13 20:05:37,509 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aff85a11f/3918bf6bcb514a47948211b569a44d57 [2019-10-13 20:05:37,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 20:05:37,525 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 20:05:37,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:37,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 20:05:37,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 20:05:37,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:37" (1/1) ... [2019-10-13 20:05:37,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d5ca97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:37, skipping insertion in model container [2019-10-13 20:05:37,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:05:37" (1/1) ... [2019-10-13 20:05:37,548 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 20:05:37,720 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 20:05:39,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:39,284 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 20:05:39,903 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 20:05:39,932 INFO L192 MainTranslator]: Completed translation [2019-10-13 20:05:39,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39 WrapperNode [2019-10-13 20:05:39,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 20:05:39,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 20:05:39,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 20:05:39,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 20:05:39,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:39,949 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,003 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (1/1) ... [2019-10-13 20:05:40,226 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 20:05:40,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 20:05:40,227 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 20:05:40,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 20:05:40,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (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 [2019-10-13 20:05:40,307 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 20:05:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 20:05:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 20:05:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 20:05:40,308 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 20:05:40,309 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 20:05:40,309 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 20:05:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 20:05:40,309 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 20:05:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 20:05:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 20:05:40,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 20:05:40,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 20:05:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 20:05:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 20:05:40,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 20:05:40,313 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 20:05:45,154 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 20:05:45,155 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 20:05:45,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:45 BoogieIcfgContainer [2019-10-13 20:05:45,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 20:05:45,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 20:05:45,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 20:05:45,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 20:05:45,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:05:37" (1/3) ... [2019-10-13 20:05:45,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a63f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:45, skipping insertion in model container [2019-10-13 20:05:45,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:05:39" (2/3) ... [2019-10-13 20:05:45,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a63f0ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:05:45, skipping insertion in model container [2019-10-13 20:05:45,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:05:45" (3/3) ... [2019-10-13 20:05:45,166 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-10-13 20:05:45,175 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 20:05:45,184 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 20:05:45,195 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 20:05:45,226 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 20:05:45,227 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 20:05:45,227 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 20:05:45,227 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 20:05:45,227 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 20:05:45,227 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 20:05:45,227 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 20:05:45,228 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 20:05:45,274 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 20:05:45,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 20:05:45,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:45,289 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] [2019-10-13 20:05:45,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-10-13 20:05:45,306 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:45,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445646401] [2019-10-13 20:05:45,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:45,307 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:45,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:45,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:45,685 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445646401] [2019-10-13 20:05:45,686 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:45,686 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 20:05:45,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857129385] [2019-10-13 20:05:45,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 20:05:45,693 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:45,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 20:05:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 20:05:45,710 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 3 states. [2019-10-13 20:05:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:50,803 INFO L93 Difference]: Finished difference Result 2443 states and 4697 transitions. [2019-10-13 20:05:50,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 20:05:50,805 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-13 20:05:50,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:50,867 INFO L225 Difference]: With dead ends: 2443 [2019-10-13 20:05:50,868 INFO L226 Difference]: Without dead ends: 1542 [2019-10-13 20:05:50,876 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 [2019-10-13 20:05:50,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2019-10-13 20:05:51,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1542. [2019-10-13 20:05:51,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1542 states. [2019-10-13 20:05:51,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 2822 transitions. [2019-10-13 20:05:51,026 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 2822 transitions. Word has length 59 [2019-10-13 20:05:51,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:51,028 INFO L462 AbstractCegarLoop]: Abstraction has 1542 states and 2822 transitions. [2019-10-13 20:05:51,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 20:05:51,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 2822 transitions. [2019-10-13 20:05:51,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 20:05:51,040 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:51,041 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:51,041 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:51,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:51,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-10-13 20:05:51,042 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:51,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661059578] [2019-10-13 20:05:51,044 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:51,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:51,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:51,265 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:51,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661059578] [2019-10-13 20:05:51,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:51,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 20:05:51,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331985433] [2019-10-13 20:05:51,269 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:05:51,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:51,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:05:51,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 20:05:51,270 INFO L87 Difference]: Start difference. First operand 1542 states and 2822 transitions. Second operand 5 states. [2019-10-13 20:05:58,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:05:58,026 INFO L93 Difference]: Finished difference Result 3912 states and 7104 transitions. [2019-10-13 20:05:58,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:05:58,034 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2019-10-13 20:05:58,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:05:58,048 INFO L225 Difference]: With dead ends: 3912 [2019-10-13 20:05:58,049 INFO L226 Difference]: Without dead ends: 2376 [2019-10-13 20:05:58,053 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 [2019-10-13 20:05:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2376 states. [2019-10-13 20:05:58,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2376 to 2350. [2019-10-13 20:05:58,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2350 states. [2019-10-13 20:05:58,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2350 states to 2350 states and 3968 transitions. [2019-10-13 20:05:58,129 INFO L78 Accepts]: Start accepts. Automaton has 2350 states and 3968 transitions. Word has length 132 [2019-10-13 20:05:58,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:05:58,133 INFO L462 AbstractCegarLoop]: Abstraction has 2350 states and 3968 transitions. [2019-10-13 20:05:58,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 20:05:58,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2350 states and 3968 transitions. [2019-10-13 20:05:58,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 20:05:58,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:05:58,141 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:05:58,141 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:05:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:05:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-10-13 20:05:58,143 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:05:58,143 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179107297] [2019-10-13 20:05:58,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,144 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:05:58,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:05:58,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:05:58,365 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:05:58,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179107297] [2019-10-13 20:05:58,366 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:05:58,366 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 20:05:58,366 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311674110] [2019-10-13 20:05:58,367 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 20:05:58,367 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:05:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 20:05:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:05:58,368 INFO L87 Difference]: Start difference. First operand 2350 states and 3968 transitions. Second operand 4 states. [2019-10-13 20:06:06,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:06,129 INFO L93 Difference]: Finished difference Result 9360 states and 16173 transitions. [2019-10-13 20:06:06,130 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 20:06:06,131 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 134 [2019-10-13 20:06:06,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:06,174 INFO L225 Difference]: With dead ends: 9360 [2019-10-13 20:06:06,175 INFO L226 Difference]: Without dead ends: 7016 [2019-10-13 20:06:06,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 20:06:06,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7016 states. [2019-10-13 20:06:06,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7016 to 7016. [2019-10-13 20:06:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7016 states. [2019-10-13 20:06:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 11462 transitions. [2019-10-13 20:06:06,392 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 11462 transitions. Word has length 134 [2019-10-13 20:06:06,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:06,393 INFO L462 AbstractCegarLoop]: Abstraction has 7016 states and 11462 transitions. [2019-10-13 20:06:06,393 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 20:06:06,394 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 11462 transitions. [2019-10-13 20:06:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-10-13 20:06:06,397 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:06,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:06,398 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:06,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:06,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1718729302, now seen corresponding path program 1 times [2019-10-13 20:06:06,399 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:06,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679258430] [2019-10-13 20:06:06,399 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:06,400 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:06,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:06,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 20:06:06,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679258430] [2019-10-13 20:06:06,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 20:06:06,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 20:06:06,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198404874] [2019-10-13 20:06:06,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 20:06:06,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:06,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 20:06:06,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 20:06:06,654 INFO L87 Difference]: Start difference. First operand 7016 states and 11462 transitions. Second operand 6 states. [2019-10-13 20:06:12,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 20:06:12,757 INFO L93 Difference]: Finished difference Result 16490 states and 27176 transitions. [2019-10-13 20:06:12,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 20:06:12,758 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 161 [2019-10-13 20:06:12,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 20:06:12,798 INFO L225 Difference]: With dead ends: 16490 [2019-10-13 20:06:12,799 INFO L226 Difference]: Without dead ends: 9480 [2019-10-13 20:06:12,815 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 [2019-10-13 20:06:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9480 states. [2019-10-13 20:06:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9480 to 9441. [2019-10-13 20:06:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9441 states. [2019-10-13 20:06:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9441 states to 9441 states and 14632 transitions. [2019-10-13 20:06:13,033 INFO L78 Accepts]: Start accepts. Automaton has 9441 states and 14632 transitions. Word has length 161 [2019-10-13 20:06:13,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 20:06:13,035 INFO L462 AbstractCegarLoop]: Abstraction has 9441 states and 14632 transitions. [2019-10-13 20:06:13,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 20:06:13,036 INFO L276 IsEmpty]: Start isEmpty. Operand 9441 states and 14632 transitions. [2019-10-13 20:06:13,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2019-10-13 20:06:13,042 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 20:06:13,043 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 20:06:13,043 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 20:06:13,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 20:06:13,043 INFO L82 PathProgramCache]: Analyzing trace with hash 531542558, now seen corresponding path program 1 times [2019-10-13 20:06:13,044 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 20:06:13,044 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829675659] [2019-10-13 20:06:13,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:13,045 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 20:06:13,045 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 20:06:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:13,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829675659] [2019-10-13 20:06:13,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127115186] [2019-10-13 20:06:13,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 20:06:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 20:06:13,313 INFO L256 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 20:06:13,325 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 20:06:13,495 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-13 20:06:13,496 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 20:06:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 104 proven. 69 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 20:06:13,685 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-13 20:06:13,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-13 20:06:13,685 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712202788] [2019-10-13 20:06:13,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 20:06:13,687 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 20:06:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 20:06:13,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-13 20:06:13,689 INFO L87 Difference]: Start difference. First operand 9441 states and 14632 transitions. Second operand 5 states.