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/Problem02_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:20,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:20,716 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:20,735 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:20,736 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:20,738 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:20,740 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:20,753 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:20,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:20,758 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:20,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:20,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:20,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:20,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:20,766 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:20,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:20,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:20,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:20,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:20,779 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:20,784 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:20,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:20,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:20,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:20,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 23:56:20,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 23:56:20,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 23:56:20,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 23:56:20,794 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 23:56:20,795 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 23:56:20,795 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:56:20,796 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:56:20,797 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:56:20,798 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:56:20,799 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:56:20,799 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:56:20,799 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:56:20,800 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:56:20,800 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:20,801 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:20,801 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:20,802 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 [2019-10-14 23:56:20,822 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:20,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:20,824 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:20,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:20,824 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:20,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:20,825 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:20,825 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:20,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:20,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:20,825 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:20,826 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:20,826 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:20,826 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:20,826 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:20,827 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:20,827 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:20,827 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:20,827 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:20,827 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:20,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:20,828 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:20,828 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:20,828 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:20,828 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:20,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:20,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:20,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:20,829 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 [2019-10-14 23:56:21,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:21,120 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:21,124 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:21,125 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:21,126 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:21,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-10-14 23:56:21,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40cfdaef/bf9d9f54e55247aa84ac55d68fee2d8d/FLAG0abce297c [2019-10-14 23:56:21,839 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:21,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label23.c [2019-10-14 23:56:21,862 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40cfdaef/bf9d9f54e55247aa84ac55d68fee2d8d/FLAG0abce297c [2019-10-14 23:56:22,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c40cfdaef/bf9d9f54e55247aa84ac55d68fee2d8d [2019-10-14 23:56:22,103 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:22,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:22,106 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:22,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:22,110 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:22,111 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5171f16b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22, skipping insertion in model container [2019-10-14 23:56:22,114 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,122 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:22,183 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:22,700 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:22,714 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:22,847 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:22,867 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:22,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22 WrapperNode [2019-10-14 23:56:22,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:22,868 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:22,868 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:22,869 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:22,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,882 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,939 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (1/1) ... [2019-10-14 23:56:22,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:22,979 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:22,979 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:22,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:22,980 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (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 [2019-10-14 23:56:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:23,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:23,060 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:23,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:24,215 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:24,215 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:24,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:24 BoogieIcfgContainer [2019-10-14 23:56:24,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:24,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:24,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:24,223 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:24,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:22" (1/3) ... [2019-10-14 23:56:24,224 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1747caf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:24, skipping insertion in model container [2019-10-14 23:56:24,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:22" (2/3) ... [2019-10-14 23:56:24,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1747caf3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:24, skipping insertion in model container [2019-10-14 23:56:24,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:24" (3/3) ... [2019-10-14 23:56:24,234 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label23.c [2019-10-14 23:56:24,248 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:24,258 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:24,272 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:24,313 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:24,313 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:24,315 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:24,315 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:24,316 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:24,316 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:24,316 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:24,316 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:24,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-14 23:56:24,379 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:24,381 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:24,383 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:24,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:24,389 INFO L82 PathProgramCache]: Analyzing trace with hash -548785191, now seen corresponding path program 1 times [2019-10-14 23:56:24,397 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:24,397 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079905080] [2019-10-14 23:56:24,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,398 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:24,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:24,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:24,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079905080] [2019-10-14 23:56:24,932 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:24,932 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:24,932 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571247914] [2019-10-14 23:56:24,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:24,941 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:24,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:24,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:24,958 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:25,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:25,911 INFO L93 Difference]: Finished difference Result 618 states and 1057 transitions. [2019-10-14 23:56:25,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:25,913 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 139 [2019-10-14 23:56:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:25,943 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:56:25,943 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:25,956 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 [2019-10-14 23:56:25,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2019-10-14 23:56:26,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2019-10-14 23:56:26,046 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 139 [2019-10-14 23:56:26,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:26,048 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2019-10-14 23:56:26,048 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:26,048 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2019-10-14 23:56:26,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:56:26,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:26,054 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:26,054 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:26,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:26,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1297037278, now seen corresponding path program 1 times [2019-10-14 23:56:26,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:26,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205389721] [2019-10-14 23:56:26,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:26,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:26,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:26,399 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:26,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205389721] [2019-10-14 23:56:26,400 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:26,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:26,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631324049] [2019-10-14 23:56:26,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:26,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:26,404 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand 5 states. [2019-10-14 23:56:27,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:27,054 INFO L93 Difference]: Finished difference Result 719 states and 1091 transitions. [2019-10-14 23:56:27,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:27,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 147 [2019-10-14 23:56:27,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:27,060 INFO L225 Difference]: With dead ends: 719 [2019-10-14 23:56:27,060 INFO L226 Difference]: Without dead ends: 319 [2019-10-14 23:56:27,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-10-14 23:56:27,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-10-14 23:56:27,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 463 transitions. [2019-10-14 23:56:27,083 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 463 transitions. Word has length 147 [2019-10-14 23:56:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:27,083 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 463 transitions. [2019-10-14 23:56:27,084 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 463 transitions. [2019-10-14 23:56:27,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-14 23:56:27,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:27,088 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:27,088 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:27,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:27,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2104183969, now seen corresponding path program 1 times [2019-10-14 23:56:27,089 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:27,089 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426888041] [2019-10-14 23:56:27,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,089 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:27,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:27,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:27,235 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426888041] [2019-10-14 23:56:27,236 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:27,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:27,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791423016] [2019-10-14 23:56:27,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:27,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:27,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:27,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:27,239 INFO L87 Difference]: Start difference. First operand 319 states and 463 transitions. Second operand 6 states. [2019-10-14 23:56:28,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:28,110 INFO L93 Difference]: Finished difference Result 941 states and 1396 transitions. [2019-10-14 23:56:28,112 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:28,112 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 172 [2019-10-14 23:56:28,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:28,118 INFO L225 Difference]: With dead ends: 941 [2019-10-14 23:56:28,118 INFO L226 Difference]: Without dead ends: 628 [2019-10-14 23:56:28,121 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:56:28,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-10-14 23:56:28,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2019-10-14 23:56:28,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-14 23:56:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 883 transitions. [2019-10-14 23:56:28,158 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 883 transitions. Word has length 172 [2019-10-14 23:56:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:28,158 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 883 transitions. [2019-10-14 23:56:28,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 883 transitions. [2019-10-14 23:56:28,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 23:56:28,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:28,162 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:28,163 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:28,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:28,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1505826471, now seen corresponding path program 1 times [2019-10-14 23:56:28,163 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:28,164 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800458832] [2019-10-14 23:56:28,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:28,164 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:28,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:28,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:28,336 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:28,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800458832] [2019-10-14 23:56:28,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792071389] [2019-10-14 23:56:28,337 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 [2019-10-14 23:56:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:28,471 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:28,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:28,600 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:28,711 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:56:28,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:56:28,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143554666] [2019-10-14 23:56:28,713 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:28,713 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:28,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:28,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:56:28,713 INFO L87 Difference]: Start difference. First operand 620 states and 883 transitions. Second operand 3 states. [2019-10-14 23:56:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:29,289 INFO L93 Difference]: Finished difference Result 1817 states and 2634 transitions. [2019-10-14 23:56:29,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:29,289 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 173 [2019-10-14 23:56:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:29,297 INFO L225 Difference]: With dead ends: 1817 [2019-10-14 23:56:29,298 INFO L226 Difference]: Without dead ends: 1203 [2019-10-14 23:56:29,300 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 345 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:56:29,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2019-10-14 23:56:29,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1057. [2019-10-14 23:56:29,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2019-10-14 23:56:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1524 transitions. [2019-10-14 23:56:29,344 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1524 transitions. Word has length 173 [2019-10-14 23:56:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:29,345 INFO L462 AbstractCegarLoop]: Abstraction has 1057 states and 1524 transitions. [2019-10-14 23:56:29,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1524 transitions. [2019-10-14 23:56:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 23:56:29,351 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:29,351 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, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:29,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:29,556 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:29,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:29,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1659833263, now seen corresponding path program 1 times [2019-10-14 23:56:29,558 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:29,558 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060767771] [2019-10-14 23:56:29,558 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:29,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:29,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:29,775 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060767771] [2019-10-14 23:56:29,776 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891790036] [2019-10-14 23:56:29,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:29,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:29,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:56:29,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:29,983 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:29,983 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:30,058 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:56:30,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1626624405] [2019-10-14 23:56:30,068 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 204 [2019-10-14 23:56:30,137 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:30,137 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)