/usr/bin/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/Problem18_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:57:55,740 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:57:55,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:57:55,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:57:55,754 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:57:55,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:57:55,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:57:55,758 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:57:55,760 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:57:55,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:57:55,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:57:55,763 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:57:55,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:57:55,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:57:55,765 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:57:55,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:57:55,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:57:55,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:57:55,770 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:57:55,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:57:55,773 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:57:55,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:57:55,775 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:57:55,776 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:57:55,778 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 22:57:55,778 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 22:57:55,778 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 22:57:55,779 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 22:57:55,779 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 22:57:55,780 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 22:57:55,781 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 22:57:55,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 22:57:55,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 22:57:55,783 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 22:57:55,784 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 22:57:55,784 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 22:57:55,785 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 22:57:55,785 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 22:57:55,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:57:55,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:57:55,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:57:55,787 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 [2019-11-06 22:57:55,805 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:57:55,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:57:55,806 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:57:55,806 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:57:55,806 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:57:55,807 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:57:55,807 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:57:55,807 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:57:55,807 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:57:55,807 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:57:55,808 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:57:55,808 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:57:55,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:57:55,809 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:57:55,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:57:55,809 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:57:55,809 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:57:55,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:57:55,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:57:55,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:57:55,810 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:57:55,810 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:57:55,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:57:55,812 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:57:55,812 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:57:55,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:57:55,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:57:55,813 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:57:55,813 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 [2019-11-06 22:57:56,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:57:56,147 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:57:56,153 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:57:56,154 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:57:56,155 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:57:56,156 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-06 22:57:56,229 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a300b11/bd088b95b5bf4fa090894d5b01cfa0ed/FLAGdcb438a21 [2019-11-06 22:57:56,939 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:57:56,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label42.c [2019-11-06 22:57:56,965 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a300b11/bd088b95b5bf4fa090894d5b01cfa0ed/FLAGdcb438a21 [2019-11-06 22:57:57,055 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c9a300b11/bd088b95b5bf4fa090894d5b01cfa0ed [2019-11-06 22:57:57,066 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:57:57,068 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:57:57,072 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:57,073 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:57:57,076 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:57:57,077 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:57" (1/1) ... [2019-11-06 22:57:57,080 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44932c6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:57, skipping insertion in model container [2019-11-06 22:57:57,080 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:57:57" (1/1) ... [2019-11-06 22:57:57,089 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:57:57,208 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:57:58,437 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:58,447 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:57:58,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:57:58,939 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:57:58,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58 WrapperNode [2019-11-06 22:57:58,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:57:58,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:57:58,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:57:58,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:57:58,955 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:58,956 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,001 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,001 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,088 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,123 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (1/1) ... [2019-11-06 22:57:59,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:57:59,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:57:59,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:57:59,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:57:59,165 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (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 [2019-11-06 22:57:59,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:57:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:57:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:57:59,238 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:57:59,239 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 22:57:59,240 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:57:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:57:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:57:59,240 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 22:57:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:57:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:57:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:57:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:57:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:57:59,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:58:03,216 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:58:03,217 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:58:03,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:03 BoogieIcfgContainer [2019-11-06 22:58:03,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:58:03,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:58:03,220 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:58:03,224 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:58:03,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:57:57" (1/3) ... [2019-11-06 22:58:03,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6b72f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:03, skipping insertion in model container [2019-11-06 22:58:03,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:57:58" (2/3) ... [2019-11-06 22:58:03,225 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a6b72f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:58:03, skipping insertion in model container [2019-11-06 22:58:03,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:58:03" (3/3) ... [2019-11-06 22:58:03,228 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label42.c [2019-11-06 22:58:03,238 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:58:03,247 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:58:03,260 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:58:03,300 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:58:03,301 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:58:03,301 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:58:03,301 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:58:03,301 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:58:03,301 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:58:03,302 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:58:03,302 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:58:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-11-06 22:58:03,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 22:58:03,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:03,414 INFO L410 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] [2019-11-06 22:58:03,416 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:03,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:03,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1002146950, now seen corresponding path program 1 times [2019-11-06 22:58:03,433 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:03,433 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789574141] [2019-11-06 22:58:03,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:03,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:03,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:03,825 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789574141] [2019-11-06 22:58:03,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:03,826 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:58:03,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191304537] [2019-11-06 22:58:03,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:58:03,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:03,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:58:03,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:58:03,853 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 3 states. [2019-11-06 22:58:09,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:09,444 INFO L93 Difference]: Finished difference Result 2248 states and 4319 transitions. [2019-11-06 22:58:09,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:58:09,447 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 55 [2019-11-06 22:58:09,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:09,488 INFO L225 Difference]: With dead ends: 2248 [2019-11-06 22:58:09,488 INFO L226 Difference]: Without dead ends: 1412 [2019-11-06 22:58:09,497 INFO L630 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 [2019-11-06 22:58:09,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2019-11-06 22:58:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1412. [2019-11-06 22:58:09,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1412 states. [2019-11-06 22:58:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 2630 transitions. [2019-11-06 22:58:09,658 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 2630 transitions. Word has length 55 [2019-11-06 22:58:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:09,660 INFO L462 AbstractCegarLoop]: Abstraction has 1412 states and 2630 transitions. [2019-11-06 22:58:09,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:58:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 2630 transitions. [2019-11-06 22:58:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-06 22:58:09,673 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:09,674 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:09,675 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:09,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:09,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1421869466, now seen corresponding path program 1 times [2019-11-06 22:58:09,676 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:09,676 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639177417] [2019-11-06 22:58:09,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:09,948 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:09,949 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639177417] [2019-11-06 22:58:09,949 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:09,949 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:09,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233314110] [2019-11-06 22:58:09,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:09,951 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:09,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:09,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:09,952 INFO L87 Difference]: Start difference. First operand 1412 states and 2630 transitions. Second operand 6 states. [2019-11-06 22:58:16,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:16,534 INFO L93 Difference]: Finished difference Result 4294 states and 8031 transitions. [2019-11-06 22:58:16,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:16,535 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 129 [2019-11-06 22:58:16,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:16,558 INFO L225 Difference]: With dead ends: 4294 [2019-11-06 22:58:16,558 INFO L226 Difference]: Without dead ends: 2888 [2019-11-06 22:58:16,562 INFO L630 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 [2019-11-06 22:58:16,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2888 states. [2019-11-06 22:58:16,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2888 to 2864. [2019-11-06 22:58:16,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2864 states. [2019-11-06 22:58:16,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2864 states to 2864 states and 4761 transitions. [2019-11-06 22:58:16,645 INFO L78 Accepts]: Start accepts. Automaton has 2864 states and 4761 transitions. Word has length 129 [2019-11-06 22:58:16,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:16,646 INFO L462 AbstractCegarLoop]: Abstraction has 2864 states and 4761 transitions. [2019-11-06 22:58:16,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:16,647 INFO L276 IsEmpty]: Start isEmpty. Operand 2864 states and 4761 transitions. [2019-11-06 22:58:16,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-11-06 22:58:16,649 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:16,649 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:16,650 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:16,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:16,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1325380034, now seen corresponding path program 1 times [2019-11-06 22:58:16,650 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:16,651 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743318949] [2019-11-06 22:58:16,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:16,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:16,785 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:16,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743318949] [2019-11-06 22:58:16,786 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:58:16,786 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:58:16,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730053371] [2019-11-06 22:58:16,789 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:58:16,789 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:16,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:58:16,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:58:16,790 INFO L87 Difference]: Start difference. First operand 2864 states and 4761 transitions. Second operand 6 states. [2019-11-06 22:58:22,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:22,663 INFO L93 Difference]: Finished difference Result 7205 states and 11771 transitions. [2019-11-06 22:58:22,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:58:22,669 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-11-06 22:58:22,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:22,696 INFO L225 Difference]: With dead ends: 7205 [2019-11-06 22:58:22,698 INFO L226 Difference]: Without dead ends: 4347 [2019-11-06 22:58:22,707 INFO L630 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 [2019-11-06 22:58:22,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2019-11-06 22:58:22,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 4331. [2019-11-06 22:58:22,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4331 states. [2019-11-06 22:58:22,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4331 states to 4331 states and 6101 transitions. [2019-11-06 22:58:22,911 INFO L78 Accepts]: Start accepts. Automaton has 4331 states and 6101 transitions. Word has length 141 [2019-11-06 22:58:22,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:22,912 INFO L462 AbstractCegarLoop]: Abstraction has 4331 states and 6101 transitions. [2019-11-06 22:58:22,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:58:22,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4331 states and 6101 transitions. [2019-11-06 22:58:22,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 22:58:22,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:22,914 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:58:22,915 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:22,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:22,915 INFO L82 PathProgramCache]: Analyzing trace with hash 163779891, now seen corresponding path program 1 times [2019-11-06 22:58:22,915 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:22,916 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530805135] [2019-11-06 22:58:22,916 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:23,189 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:23,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530805135] [2019-11-06 22:58:23,190 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416456210] [2019-11-06 22:58:23,190 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 [2019-11-06 22:58:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:23,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:58:23,312 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:23,412 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:23,413 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:23,497 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:58:23,498 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:58:23,498 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [7] total 9 [2019-11-06 22:58:23,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817024163] [2019-11-06 22:58:23,500 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:58:23,501 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:23,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:58:23,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:58:23,503 INFO L87 Difference]: Start difference. First operand 4331 states and 6101 transitions. Second operand 4 states. [2019-11-06 22:58:30,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:58:30,630 INFO L93 Difference]: Finished difference Result 15774 states and 22539 transitions. [2019-11-06 22:58:30,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:58:30,631 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 166 [2019-11-06 22:58:30,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:58:30,680 INFO L225 Difference]: With dead ends: 15774 [2019-11-06 22:58:30,681 INFO L226 Difference]: Without dead ends: 11449 [2019-11-06 22:58:30,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:58:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11449 states. [2019-11-06 22:58:30,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11449 to 10040. [2019-11-06 22:58:30,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10040 states. [2019-11-06 22:58:30,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 13191 transitions. [2019-11-06 22:58:30,939 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 13191 transitions. Word has length 166 [2019-11-06 22:58:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:58:30,940 INFO L462 AbstractCegarLoop]: Abstraction has 10040 states and 13191 transitions. [2019-11-06 22:58:30,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:58:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 13191 transitions. [2019-11-06 22:58:30,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2019-11-06 22:58:30,944 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:58:30,944 INFO L410 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, 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] [2019-11-06 22:58:31,149 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:58:31,150 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:58:31,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:58:31,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1744081679, now seen corresponding path program 1 times [2019-11-06 22:58:31,151 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:58:31,151 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122078121] [2019-11-06 22:58:31,151 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:58:31,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:31,328 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:31,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122078121] [2019-11-06 22:58:31,330 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545825874] [2019-11-06 22:58:31,330 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 [2019-11-06 22:58:31,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:58:31,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 22:58:31,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:58:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-06 22:58:31,512 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:58:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 96 proven. 67 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:58:31,635 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-11-06 22:58:31,635 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2019-11-06 22:58:31,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930246378] [2019-11-06 22:58:31,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:58:31,637 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:58:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:58:31,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:58:31,638 INFO L87 Difference]: Start difference. First operand 10040 states and 13191 transitions. Second operand 5 states.