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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:05:15,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:05:15,793 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:05:15,807 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:05:15,807 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:05:15,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:05:15,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:05:15,811 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:05:15,813 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:05:15,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:05:15,815 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:05:15,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:05:15,817 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:05:15,818 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:05:15,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:05:15,820 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:05:15,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:05:15,821 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:05:15,823 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:05:15,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:05:15,827 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:05:15,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:05:15,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:05:15,830 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:05:15,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:05:15,841 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:05:15,842 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:05:15,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:05:15,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:05:15,864 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:05:15,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:05:15,866 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:05:15,866 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:05:15,866 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:05:15,867 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:05:15,867 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:05:15,867 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:05:15,867 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:05:15,867 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:05:15,868 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:05:15,868 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:05:15,868 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:05:15,868 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:05:15,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:05:15,869 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:05:15,869 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:05:15,869 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:05:15,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:05:15,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:05:15,870 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:05:15,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:15,870 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:05:15,870 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:05:15,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:05:15,871 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:05:15,871 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:05:15,871 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:05:15,871 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:05:16,151 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:05:16,165 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:05:16,169 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:05:16,171 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:05:16,171 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:05:16,172 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-15 00:05:16,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82713c73/97c5c1f91d134baeb2344efe07725303/FLAG2691d685a [2019-10-15 00:05:17,105 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:05:17,106 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-10-15 00:05:17,137 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82713c73/97c5c1f91d134baeb2344efe07725303/FLAG2691d685a [2019-10-15 00:05:17,571 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c82713c73/97c5c1f91d134baeb2344efe07725303 [2019-10-15 00:05:17,581 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:05:17,583 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:05:17,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:17,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:05:17,588 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:05:17,589 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:17" (1/1) ... [2019-10-15 00:05:17,591 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@581c0b66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:17, skipping insertion in model container [2019-10-15 00:05:17,592 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:05:17" (1/1) ... [2019-10-15 00:05:17,599 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:05:17,786 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:05:19,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:19,470 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:05:20,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:05:20,222 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:05:20,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20 WrapperNode [2019-10-15 00:05:20,223 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:05:20,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:05:20,226 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:05:20,226 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:05:20,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,315 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,317 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,441 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,494 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... [2019-10-15 00:05:20,626 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:05:20,627 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:05:20,627 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:05:20,627 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:05:20,629 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:05:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:05:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:05:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:05:20,696 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-15 00:05:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-15 00:05:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-15 00:05:20,697 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:05:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:05:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-15 00:05:20,697 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:05:20,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:05:20,699 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:05:27,084 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:05:27,084 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:05:27,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:27 BoogieIcfgContainer [2019-10-15 00:05:27,088 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:05:27,089 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:05:27,089 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:05:27,092 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:05:27,093 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:05:17" (1/3) ... [2019-10-15 00:05:27,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22090735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:27, skipping insertion in model container [2019-10-15 00:05:27,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:05:20" (2/3) ... [2019-10-15 00:05:27,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22090735 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:05:27, skipping insertion in model container [2019-10-15 00:05:27,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:05:27" (3/3) ... [2019-10-15 00:05:27,096 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-10-15 00:05:27,106 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:05:27,116 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:05:27,129 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:05:27,167 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:05:27,167 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:05:27,167 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:05:27,167 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:05:27,167 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:05:27,168 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:05:27,168 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:05:27,168 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:05:27,205 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-10-15 00:05:27,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-15 00:05:27,215 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:27,216 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] [2019-10-15 00:05:27,218 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:27,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-10-15 00:05:27,234 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:27,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230828660] [2019-10-15 00:05:27,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:27,235 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:27,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:27,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:27,599 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230828660] [2019-10-15 00:05:27,600 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:27,600 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:05:27,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374580423] [2019-10-15 00:05:27,605 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:05:27,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:27,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:05:27,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:27,625 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 4 states. [2019-10-15 00:05:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:36,862 INFO L93 Difference]: Finished difference Result 3964 states and 7388 transitions. [2019-10-15 00:05:36,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:05:36,866 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2019-10-15 00:05:36,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:36,905 INFO L225 Difference]: With dead ends: 3964 [2019-10-15 00:05:36,906 INFO L226 Difference]: Without dead ends: 2758 [2019-10-15 00:05:36,916 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:05:36,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2758 states. [2019-10-15 00:05:37,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2758 to 1919. [2019-10-15 00:05:37,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1919 states. [2019-10-15 00:05:37,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1919 states to 1919 states and 3313 transitions. [2019-10-15 00:05:37,067 INFO L78 Accepts]: Start accepts. Automaton has 1919 states and 3313 transitions. Word has length 61 [2019-10-15 00:05:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:37,068 INFO L462 AbstractCegarLoop]: Abstraction has 1919 states and 3313 transitions. [2019-10-15 00:05:37,068 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:05:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1919 states and 3313 transitions. [2019-10-15 00:05:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 00:05:37,074 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:37,075 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:37,075 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:37,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:37,076 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-10-15 00:05:37,076 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:37,077 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107856805] [2019-10-15 00:05:37,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:37,077 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:37,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:37,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:37,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107856805] [2019-10-15 00:05:37,331 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:37,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:37,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392542931] [2019-10-15 00:05:37,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:37,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:37,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:37,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:37,334 INFO L87 Difference]: Start difference. First operand 1919 states and 3313 transitions. Second operand 5 states. [2019-10-15 00:05:45,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:05:45,512 INFO L93 Difference]: Finished difference Result 5545 states and 9710 transitions. [2019-10-15 00:05:45,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:05:45,512 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2019-10-15 00:05:45,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:05:45,542 INFO L225 Difference]: With dead ends: 5545 [2019-10-15 00:05:45,542 INFO L226 Difference]: Without dead ends: 3632 [2019-10-15 00:05:45,551 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:05:45,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3632 states. [2019-10-15 00:05:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3632 to 3623. [2019-10-15 00:05:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3623 states. [2019-10-15 00:05:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 5644 transitions. [2019-10-15 00:05:45,687 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 5644 transitions. Word has length 130 [2019-10-15 00:05:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:05:45,688 INFO L462 AbstractCegarLoop]: Abstraction has 3623 states and 5644 transitions. [2019-10-15 00:05:45,688 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:05:45,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 5644 transitions. [2019-10-15 00:05:45,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-15 00:05:45,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:05:45,692 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:05:45,692 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:05:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:05:45,693 INFO L82 PathProgramCache]: Analyzing trace with hash 1084274893, now seen corresponding path program 1 times [2019-10-15 00:05:45,693 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:05:45,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023161095] [2019-10-15 00:05:45,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:45,694 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:05:45,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:05:45,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:05:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:05:45,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023161095] [2019-10-15 00:05:45,927 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:05:45,928 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:05:45,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887152033] [2019-10-15 00:05:45,929 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:05:45,929 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:05:45,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:05:45,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:05:45,938 INFO L87 Difference]: Start difference. First operand 3623 states and 5644 transitions. Second operand 5 states.