/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/Problem16_label13.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:54:06,792 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:54:06,795 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:54:06,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 22:54:06,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 22:54:06,815 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 22:54:06,817 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 22:54:06,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 22:54:06,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 22:54:06,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 22:54:06,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 22:54:06,824 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 22:54:06,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:54:06,825 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:54:06,826 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:54:06,827 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:54:06,828 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:54:06,829 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:54:06,830 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:54:06,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:54:06,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:54:06,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:54:06,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:54:06,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:54:06,838 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:54:06,845 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:54:06,846 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:54:06,847 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:54:06,848 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 22:54:06,863 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:54:06,863 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:54:06,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:54:06,865 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:54:06,865 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:54:06,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:54:06,865 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:54:06,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:54:06,866 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:54:06,868 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:54:06,868 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:54:06,868 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:54:06,868 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:54:06,869 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:54:06,869 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:54:06,869 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:54:06,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:54:06,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:54:06,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:54:06,870 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:54:06,870 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:54:06,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:54:06,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:54:06,871 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 [2019-11-06 22:54:07,155 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:54:07,175 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:54:07,179 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:54:07,180 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:54:07,180 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:54:07,181 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label13.c [2019-11-06 22:54:07,254 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c098f0af1/c564fbf4cf564a428dbc17b0f4255baa/FLAG70b14c192 [2019-11-06 22:54:07,937 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:54:07,937 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label13.c [2019-11-06 22:54:07,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c098f0af1/c564fbf4cf564a428dbc17b0f4255baa/FLAG70b14c192 [2019-11-06 22:54:08,153 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c098f0af1/c564fbf4cf564a428dbc17b0f4255baa [2019-11-06 22:54:08,161 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:54:08,162 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:54:08,163 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:08,163 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:54:08,167 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:54:08,168 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:08" (1/1) ... [2019-11-06 22:54:08,170 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@661c606e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:08, skipping insertion in model container [2019-11-06 22:54:08,171 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:54:08" (1/1) ... [2019-11-06 22:54:08,178 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:54:08,263 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:54:09,254 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:09,265 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:54:09,489 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:54:09,508 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:54:09,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09 WrapperNode [2019-11-06 22:54:09,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:54:09,510 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:54:09,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:54:09,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:54:09,525 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,573 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,636 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,673 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (1/1) ... [2019-11-06 22:54:09,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:54:09,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:54:09,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:54:09,697 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:54:09,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (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 22:54:09,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:54:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:54:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:54:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 22:54:09,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:54:09,771 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:54:09,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:54:09,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:54:12,196 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:54:12,196 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:54:12,198 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:12 BoogieIcfgContainer [2019-11-06 22:54:12,198 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:54:12,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:54:12,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:54:12,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:54:12,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:54:08" (1/3) ... [2019-11-06 22:54:12,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91d6409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:12, skipping insertion in model container [2019-11-06 22:54:12,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:54:09" (2/3) ... [2019-11-06 22:54:12,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@91d6409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:54:12, skipping insertion in model container [2019-11-06 22:54:12,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:54:12" (3/3) ... [2019-11-06 22:54:12,220 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label13.c [2019-11-06 22:54:12,237 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:54:12,252 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:54:12,266 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:54:12,321 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:54:12,322 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:54:12,322 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:54:12,322 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:54:12,322 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:54:12,322 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:54:12,323 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:54:12,323 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:54:12,370 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-11-06 22:54:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-06 22:54:12,382 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:12,383 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:54:12,386 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:12,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:12,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1029807235, now seen corresponding path program 1 times [2019-11-06 22:54:12,404 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:12,404 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986195897] [2019-11-06 22:54:12,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:12,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:12,824 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 22:54:12,825 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986195897] [2019-11-06 22:54:12,826 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:12,826 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 22:54:12,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514008882] [2019-11-06 22:54:12,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 22:54:12,835 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:12,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 22:54:12,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 22:54:12,853 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-11-06 22:54:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:15,589 INFO L93 Difference]: Finished difference Result 1153 states and 2141 transitions. [2019-11-06 22:54:15,589 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:54:15,591 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-11-06 22:54:15,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:15,614 INFO L225 Difference]: With dead ends: 1153 [2019-11-06 22:54:15,614 INFO L226 Difference]: Without dead ends: 682 [2019-11-06 22:54:15,625 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 22:54:15,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-11-06 22:54:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-11-06 22:54:15,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-11-06 22:54:15,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1184 transitions. [2019-11-06 22:54:15,729 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1184 transitions. Word has length 62 [2019-11-06 22:54:15,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:15,729 INFO L462 AbstractCegarLoop]: Abstraction has 682 states and 1184 transitions. [2019-11-06 22:54:15,730 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 22:54:15,730 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1184 transitions. [2019-11-06 22:54:15,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-06 22:54:15,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:15,737 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, 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] [2019-11-06 22:54:15,737 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:15,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1750057103, now seen corresponding path program 1 times [2019-11-06 22:54:15,738 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:15,738 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57590324] [2019-11-06 22:54:15,738 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:15,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:15,952 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:15,953 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57590324] [2019-11-06 22:54:15,953 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:15,953 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-06 22:54:15,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894095666] [2019-11-06 22:54:15,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 22:54:15,956 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:15,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 22:54:15,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-06 22:54:15,956 INFO L87 Difference]: Start difference. First operand 682 states and 1184 transitions. Second operand 5 states. [2019-11-06 22:54:18,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:18,741 INFO L93 Difference]: Finished difference Result 2066 states and 3624 transitions. [2019-11-06 22:54:18,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:18,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 131 [2019-11-06 22:54:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:18,753 INFO L225 Difference]: With dead ends: 2066 [2019-11-06 22:54:18,753 INFO L226 Difference]: Without dead ends: 1390 [2019-11-06 22:54:18,756 INFO L630 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 [2019-11-06 22:54:18,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2019-11-06 22:54:18,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1372. [2019-11-06 22:54:18,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1372 states. [2019-11-06 22:54:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1372 states to 1372 states and 2268 transitions. [2019-11-06 22:54:18,814 INFO L78 Accepts]: Start accepts. Automaton has 1372 states and 2268 transitions. Word has length 131 [2019-11-06 22:54:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:18,815 INFO L462 AbstractCegarLoop]: Abstraction has 1372 states and 2268 transitions. [2019-11-06 22:54:18,815 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 22:54:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1372 states and 2268 transitions. [2019-11-06 22:54:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-11-06 22:54:18,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:18,819 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, 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] [2019-11-06 22:54:18,819 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:18,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:18,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1781549380, now seen corresponding path program 1 times [2019-11-06 22:54:18,820 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:18,820 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651569072] [2019-11-06 22:54:18,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:19,036 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651569072] [2019-11-06 22:54:19,037 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:19,037 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:19,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419027705] [2019-11-06 22:54:19,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:19,038 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:19,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:19,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:19,039 INFO L87 Difference]: Start difference. First operand 1372 states and 2268 transitions. Second operand 6 states. [2019-11-06 22:54:21,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:21,704 INFO L93 Difference]: Finished difference Result 3472 states and 5791 transitions. [2019-11-06 22:54:21,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:21,705 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 160 [2019-11-06 22:54:21,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:21,720 INFO L225 Difference]: With dead ends: 3472 [2019-11-06 22:54:21,720 INFO L226 Difference]: Without dead ends: 2106 [2019-11-06 22:54:21,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-11-06 22:54:21,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-11-06 22:54:21,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2081. [2019-11-06 22:54:21,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-11-06 22:54:21,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3263 transitions. [2019-11-06 22:54:21,812 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3263 transitions. Word has length 160 [2019-11-06 22:54:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:21,814 INFO L462 AbstractCegarLoop]: Abstraction has 2081 states and 3263 transitions. [2019-11-06 22:54:21,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3263 transitions. [2019-11-06 22:54:21,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 22:54:21,821 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:21,822 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, 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] [2019-11-06 22:54:21,822 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:21,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1787873856, now seen corresponding path program 1 times [2019-11-06 22:54:21,823 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:21,823 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18689740] [2019-11-06 22:54:21,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:21,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:22,070 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:54:22,071 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18689740] [2019-11-06 22:54:22,071 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:54:22,071 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:54:22,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483899205] [2019-11-06 22:54:22,072 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:54:22,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:54:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:54:22,073 INFO L87 Difference]: Start difference. First operand 2081 states and 3263 transitions. Second operand 6 states. [2019-11-06 22:54:24,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:24,503 INFO L93 Difference]: Finished difference Result 5241 states and 8253 transitions. [2019-11-06 22:54:24,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:54:24,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 178 [2019-11-06 22:54:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:24,521 INFO L225 Difference]: With dead ends: 5241 [2019-11-06 22:54:24,521 INFO L226 Difference]: Without dead ends: 3166 [2019-11-06 22:54:24,526 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 22:54:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3166 states. [2019-11-06 22:54:24,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3166 to 3140. [2019-11-06 22:54:24,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3140 states. [2019-11-06 22:54:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3140 states to 3140 states and 4128 transitions. [2019-11-06 22:54:24,601 INFO L78 Accepts]: Start accepts. Automaton has 3140 states and 4128 transitions. Word has length 178 [2019-11-06 22:54:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:24,601 INFO L462 AbstractCegarLoop]: Abstraction has 3140 states and 4128 transitions. [2019-11-06 22:54:24,602 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:54:24,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3140 states and 4128 transitions. [2019-11-06 22:54:24,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2019-11-06 22:54:24,605 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:24,606 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, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:54:24,606 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:24,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:24,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1569357003, now seen corresponding path program 1 times [2019-11-06 22:54:24,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:24,607 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263773879] [2019-11-06 22:54:24,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:24,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:24,799 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 22:54:24,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263773879] [2019-11-06 22:54:24,800 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078072552] [2019-11-06 22:54:24,800 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 22:54:24,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:24,928 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:24,956 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:25,150 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 22:54:25,261 INFO L218 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-06 22:54:25,261 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2019-11-06 22:54:25,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225658760] [2019-11-06 22:54:25,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:54:25,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:54:25,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:54:25,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:25,265 INFO L87 Difference]: Start difference. First operand 3140 states and 4128 transitions. Second operand 4 states. [2019-11-06 22:54:28,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:54:28,982 INFO L93 Difference]: Finished difference Result 8317 states and 11073 transitions. [2019-11-06 22:54:28,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:54:28,986 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2019-11-06 22:54:28,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:54:29,009 INFO L225 Difference]: With dead ends: 8317 [2019-11-06 22:54:29,009 INFO L226 Difference]: Without dead ends: 5183 [2019-11-06 22:54:29,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:54:29,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5183 states. [2019-11-06 22:54:29,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5183 to 4842. [2019-11-06 22:54:29,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4842 states. [2019-11-06 22:54:29,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4842 states to 4842 states and 6246 transitions. [2019-11-06 22:54:29,201 INFO L78 Accepts]: Start accepts. Automaton has 4842 states and 6246 transitions. Word has length 260 [2019-11-06 22:54:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:54:29,202 INFO L462 AbstractCegarLoop]: Abstraction has 4842 states and 6246 transitions. [2019-11-06 22:54:29,202 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:54:29,202 INFO L276 IsEmpty]: Start isEmpty. Operand 4842 states and 6246 transitions. [2019-11-06 22:54:29,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2019-11-06 22:54:29,216 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:54:29,217 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-11-06 22:54:29,423 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 22:54:29,423 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:54:29,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:29,424 INFO L82 PathProgramCache]: Analyzing trace with hash 2063105848, now seen corresponding path program 1 times [2019-11-06 22:54:29,424 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:54:29,424 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109451700] [2019-11-06 22:54:29,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:54:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 282 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:29,911 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109451700] [2019-11-06 22:54:29,911 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597524807] [2019-11-06 22:54:29,911 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 22:54:30,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:54:30,063 INFO L256 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 22:54:30,089 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:54:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 466 proven. 2 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2019-11-06 22:54:30,301 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:54:30,582 INFO L134 CoverageAnalysis]: Checked inductivity of 524 backedges. 282 proven. 115 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2019-11-06 22:54:30,583 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [629279283] [2019-11-06 22:54:30,588 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 505 [2019-11-06 22:54:30,644 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:54:30,644 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-11-06 22:54:43,550 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-11-06 22:54:43,553 INFO L272 AbstractInterpreter]: Visited 204 different actions 204 times. Never merged. Never widened. Performed 381 root evaluator evaluations with a maximum evaluation depth of 14. Performed 381 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-11-06 22:54:43,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:54:43,558 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates