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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:56:48,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:56:48,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:56:48,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:56:48,730 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:56:48,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:56:48,734 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:56:48,744 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:56:48,748 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:56:48,751 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:56:48,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:56:48,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:56:48,756 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:56:48,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:56:48,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:56:48,761 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:56:48,762 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:56:48,764 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:56:48,765 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:56:48,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:56:48,774 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:56:48,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:56:48,780 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:56:48,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:56:48,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:56:48,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:56:48,793 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:56:48,794 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:56:48,795 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 23:56:48,826 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:56:48,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:56:48,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:56:48,828 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:56:48,828 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:56:48,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:56:48,829 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:56:48,829 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:56:48,829 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:56:48,829 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:56:48,830 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:56:48,830 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:56:48,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:56:48,831 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:56:48,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:56:48,831 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:56:48,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:56:48,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:56:48,832 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:56:48,832 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:56:48,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:56:48,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:56:48,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:56:48,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:56:48,833 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:56:48,833 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:56:48,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:56:48,834 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:56:48,834 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 23:56:49,132 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:56:49,145 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:56:49,149 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:56:49,150 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:56:49,150 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:56:49,151 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem02_label33.c [2019-10-14 23:56:49,228 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3402bffbc/a6dcf1d3b9984115815137037c7b18bd/FLAG0939791c6 [2019-10-14 23:56:49,786 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:56:49,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem02_label33.c [2019-10-14 23:56:49,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3402bffbc/a6dcf1d3b9984115815137037c7b18bd/FLAG0939791c6 [2019-10-14 23:56:50,073 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3402bffbc/a6dcf1d3b9984115815137037c7b18bd [2019-10-14 23:56:50,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:56:50,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:56:50,089 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:50,089 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:56:50,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:56:50,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5747fda8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50, skipping insertion in model container [2019-10-14 23:56:50,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,105 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:56:50,157 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:56:50,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:50,731 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:56:50,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:56:50,848 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:56:50,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50 WrapperNode [2019-10-14 23:56:50,849 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:56:50,849 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:56:50,850 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:56:50,850 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:56:50,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,880 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,950 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,954 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (1/1) ... [2019-10-14 23:56:50,962 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:56:50,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:56:50,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:56:50,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:56:50,963 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (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 23:56:51,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:56:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:56:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 23:56:51,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:56:51,035 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:56:51,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:56:52,206 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:56:52,207 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 23:56:52,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:52 BoogieIcfgContainer [2019-10-14 23:56:52,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:56:52,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:56:52,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:56:52,213 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:56:52,214 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:56:50" (1/3) ... [2019-10-14 23:56:52,215 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51006c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:52, skipping insertion in model container [2019-10-14 23:56:52,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:56:50" (2/3) ... [2019-10-14 23:56:52,216 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51006c9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:56:52, skipping insertion in model container [2019-10-14 23:56:52,216 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:56:52" (3/3) ... [2019-10-14 23:56:52,218 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem02_label33.c [2019-10-14 23:56:52,229 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:56:52,238 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:56:52,253 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:56:52,286 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:56:52,286 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:56:52,286 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:56:52,287 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:56:52,287 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:56:52,287 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:56:52,287 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:56:52,288 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:56:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states. [2019-10-14 23:56:52,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-14 23:56:52,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:52,332 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:52,334 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:52,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:52,343 INFO L82 PathProgramCache]: Analyzing trace with hash -421614983, now seen corresponding path program 1 times [2019-10-14 23:56:52,355 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:52,355 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639093520] [2019-10-14 23:56:52,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:52,356 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:52,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:52,873 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 23:56:52,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639093520] [2019-10-14 23:56:52,875 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:52,875 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 23:56:52,877 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365310952] [2019-10-14 23:56:52,890 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:52,891 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:52,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:52,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 23:56:52,909 INFO L87 Difference]: Start difference. First operand 236 states. Second operand 3 states. [2019-10-14 23:56:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:53,859 INFO L93 Difference]: Finished difference Result 618 states and 1057 transitions. [2019-10-14 23:56:53,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:53,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-10-14 23:56:53,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:53,887 INFO L225 Difference]: With dead ends: 618 [2019-10-14 23:56:53,887 INFO L226 Difference]: Without dead ends: 320 [2019-10-14 23:56:53,900 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 23:56:53,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2019-10-14 23:56:54,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 319. [2019-10-14 23:56:54,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 466 transitions. [2019-10-14 23:56:54,026 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 466 transitions. Word has length 147 [2019-10-14 23:56:54,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:54,030 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 466 transitions. [2019-10-14 23:56:54,030 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 466 transitions. [2019-10-14 23:56:54,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2019-10-14 23:56:54,045 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:54,045 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:54,046 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:54,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:54,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1995823486, now seen corresponding path program 1 times [2019-10-14 23:56:54,049 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:54,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943916612] [2019-10-14 23:56:54,049 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:54,050 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:54,050 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:54,369 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 23:56:54,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943916612] [2019-10-14 23:56:54,370 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:54,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-14 23:56:54,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742410442] [2019-10-14 23:56:54,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 23:56:54,372 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 23:56:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:56:54,373 INFO L87 Difference]: Start difference. First operand 319 states and 466 transitions. Second operand 5 states. [2019-10-14 23:56:55,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:55,110 INFO L93 Difference]: Finished difference Result 719 states and 1091 transitions. [2019-10-14 23:56:55,114 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:56:55,114 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 155 [2019-10-14 23:56:55,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:55,117 INFO L225 Difference]: With dead ends: 719 [2019-10-14 23:56:55,117 INFO L226 Difference]: Without dead ends: 319 [2019-10-14 23:56:55,119 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 23:56:55,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2019-10-14 23:56:55,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2019-10-14 23:56:55,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2019-10-14 23:56:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 463 transitions. [2019-10-14 23:56:55,135 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 463 transitions. Word has length 155 [2019-10-14 23:56:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:55,136 INFO L462 AbstractCegarLoop]: Abstraction has 319 states and 463 transitions. [2019-10-14 23:56:55,136 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 23:56:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 463 transitions. [2019-10-14 23:56:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 23:56:55,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:55,139 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:55,139 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:55,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:55,140 INFO L82 PathProgramCache]: Analyzing trace with hash 789332991, now seen corresponding path program 1 times [2019-10-14 23:56:55,140 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:55,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919435629] [2019-10-14 23:56:55,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:55,141 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:55,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:55,274 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 23:56:55,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919435629] [2019-10-14 23:56:55,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:56:55,276 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 23:56:55,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493073540] [2019-10-14 23:56:55,277 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 23:56:55,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:55,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 23:56:55,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 23:56:55,279 INFO L87 Difference]: Start difference. First operand 319 states and 463 transitions. Second operand 6 states. [2019-10-14 23:56:56,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:56,162 INFO L93 Difference]: Finished difference Result 941 states and 1396 transitions. [2019-10-14 23:56:56,163 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 23:56:56,163 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 180 [2019-10-14 23:56:56,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:56,169 INFO L225 Difference]: With dead ends: 941 [2019-10-14 23:56:56,169 INFO L226 Difference]: Without dead ends: 628 [2019-10-14 23:56:56,171 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 23:56:56,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2019-10-14 23:56:56,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 620. [2019-10-14 23:56:56,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 620 states. [2019-10-14 23:56:56,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 883 transitions. [2019-10-14 23:56:56,198 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 883 transitions. Word has length 180 [2019-10-14 23:56:56,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:56,199 INFO L462 AbstractCegarLoop]: Abstraction has 620 states and 883 transitions. [2019-10-14 23:56:56,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 23:56:56,199 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 883 transitions. [2019-10-14 23:56:56,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-14 23:56:56,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:56,203 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:56,203 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:56,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:56,203 INFO L82 PathProgramCache]: Analyzing trace with hash -24780807, now seen corresponding path program 1 times [2019-10-14 23:56:56,204 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:56,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660043008] [2019-10-14 23:56:56,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:56,204 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:56,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:56,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:56,419 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 23:56:56,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660043008] [2019-10-14 23:56:56,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855068872] [2019-10-14 23:56:56,420 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 23:56:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:56,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:56:56,550 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:56,638 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 23:56:56,638 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:56,729 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 23:56:56,730 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:56:56,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 8 [2019-10-14 23:56:56,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764408094] [2019-10-14 23:56:56,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 23:56:56,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-14 23:56:56,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 23:56:56,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 23:56:56,732 INFO L87 Difference]: Start difference. First operand 620 states and 883 transitions. Second operand 3 states. [2019-10-14 23:56:57,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:56:57,326 INFO L93 Difference]: Finished difference Result 1817 states and 2634 transitions. [2019-10-14 23:56:57,328 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 23:56:57,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 181 [2019-10-14 23:56:57,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:56:57,337 INFO L225 Difference]: With dead ends: 1817 [2019-10-14 23:56:57,338 INFO L226 Difference]: Without dead ends: 1203 [2019-10-14 23:56:57,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 361 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 23:56:57,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2019-10-14 23:56:57,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1057. [2019-10-14 23:56:57,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2019-10-14 23:56:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1524 transitions. [2019-10-14 23:56:57,401 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1524 transitions. Word has length 181 [2019-10-14 23:56:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:56:57,402 INFO L462 AbstractCegarLoop]: Abstraction has 1057 states and 1524 transitions. [2019-10-14 23:56:57,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 23:56:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1524 transitions. [2019-10-14 23:56:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2019-10-14 23:56:57,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:56:57,407 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:56:57,613 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:56:57,614 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:56:57,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:56:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1375302385, now seen corresponding path program 1 times [2019-10-14 23:56:57,615 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-14 23:56:57,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059626331] [2019-10-14 23:56:57,616 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:57,617 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:56:57,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:56:57,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:57,739 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 23:56:57,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059626331] [2019-10-14 23:56:57,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048325057] [2019-10-14 23:56:57,740 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 23:56:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:56:57,865 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 23:56:57,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:56:58,020 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 23:56:58,021 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-14 23:56:58,210 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 23:56:58,211 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [375588507] [2019-10-14 23:56:58,220 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 212 [2019-10-14 23:56:58,280 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-14 23:56:58,280 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)