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/Problem11_label59.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:04:17,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:04:17,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:04:17,791 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:04:17,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:04:17,793 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:04:17,794 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:04:17,796 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:04:17,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:04:17,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:04:17,799 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:04:17,800 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:04:17,800 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:04:17,801 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:04:17,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:04:17,803 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:04:17,804 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:04:17,805 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:04:17,807 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:04:17,809 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:04:17,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:04:17,811 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:04:17,812 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:04:17,813 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:04:17,816 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:04:17,823 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:04:17,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:04:17,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:04:17,826 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 00:04:17,840 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:04:17,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:04:17,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:04:17,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:04:17,842 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:04:17,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:04:17,842 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:04:17,842 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:04:17,843 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:04:17,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:04:17,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:04:17,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:04:17,843 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:04:17,844 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:04:17,844 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:04:17,844 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:04:17,844 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:04:17,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:04:17,845 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:04:17,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:04:17,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:04:17,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:04:17,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:04:17,846 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:04:17,846 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:04:17,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:04:17,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:04:17,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:04:17,847 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 00:04:18,105 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:04:18,125 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:04:18,129 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:04:18,130 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:04:18,131 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:04:18,131 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-10-15 00:04:18,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec68789b2/16224ec99efc44b2a076c1e899f4d875/FLAG5e5c4e911 [2019-10-15 00:04:18,771 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:04:18,772 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label59.c [2019-10-15 00:04:18,794 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec68789b2/16224ec99efc44b2a076c1e899f4d875/FLAG5e5c4e911 [2019-10-15 00:04:18,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ec68789b2/16224ec99efc44b2a076c1e899f4d875 [2019-10-15 00:04:18,991 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:04:18,992 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:04:18,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:18,994 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:04:18,998 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:04:18,999 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:18" (1/1) ... [2019-10-15 00:04:19,002 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@510c1389 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:19, skipping insertion in model container [2019-10-15 00:04:19,002 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:04:18" (1/1) ... [2019-10-15 00:04:19,009 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:04:19,077 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:04:19,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:19,762 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:04:20,001 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:04:20,021 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:04:20,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20 WrapperNode [2019-10-15 00:04:20,022 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:04:20,023 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:04:20,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:04:20,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:04:20,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,074 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,075 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,148 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (1/1) ... [2019-10-15 00:04:20,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:04:20,185 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:04:20,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:04:20,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:04:20,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (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 00:04:20,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:04:20,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:04:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:04:20,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:04:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:04:20,241 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:04:20,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:04:20,242 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:04:20,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:04:20,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:04:20,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:04:22,119 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:04:22,119 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:04:22,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:22 BoogieIcfgContainer [2019-10-15 00:04:22,121 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:04:22,122 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:04:22,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:04:22,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:04:22,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:04:18" (1/3) ... [2019-10-15 00:04:22,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b76474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:22, skipping insertion in model container [2019-10-15 00:04:22,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:04:20" (2/3) ... [2019-10-15 00:04:22,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47b76474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:04:22, skipping insertion in model container [2019-10-15 00:04:22,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:04:22" (3/3) ... [2019-10-15 00:04:22,131 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label59.c [2019-10-15 00:04:22,142 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:04:22,153 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:04:22,167 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:04:22,214 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:04:22,214 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:04:22,215 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:04:22,215 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:04:22,215 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:04:22,216 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:04:22,216 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:04:22,216 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:04:22,253 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:04:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-15 00:04:22,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:22,267 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:22,270 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:22,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:22,276 INFO L82 PathProgramCache]: Analyzing trace with hash -912328190, now seen corresponding path program 1 times [2019-10-15 00:04:22,287 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:22,288 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120695787] [2019-10-15 00:04:22,288 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:22,289 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:22,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:22,779 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 00:04:22,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120695787] [2019-10-15 00:04:22,780 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:22,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:22,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364770885] [2019-10-15 00:04:22,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:22,788 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:22,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:22,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:22,806 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:04:24,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:24,251 INFO L93 Difference]: Finished difference Result 782 states and 1375 transitions. [2019-10-15 00:04:24,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:24,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2019-10-15 00:04:24,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:24,291 INFO L225 Difference]: With dead ends: 782 [2019-10-15 00:04:24,291 INFO L226 Difference]: Without dead ends: 428 [2019-10-15 00:04:24,304 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2019-10-15 00:04:24,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 420. [2019-10-15 00:04:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:04:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 671 transitions. [2019-10-15 00:04:24,446 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 671 transitions. Word has length 65 [2019-10-15 00:04:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:24,447 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 671 transitions. [2019-10-15 00:04:24,448 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:24,448 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 671 transitions. [2019-10-15 00:04:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-15 00:04:24,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:24,462 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:24,462 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash -588923191, now seen corresponding path program 1 times [2019-10-15 00:04:24,464 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:24,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536978530] [2019-10-15 00:04:24,465 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,465 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:24,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:24,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:24,741 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536978530] [2019-10-15 00:04:24,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:24,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:24,741 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829132158] [2019-10-15 00:04:24,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:24,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:24,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:24,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:24,744 INFO L87 Difference]: Start difference. First operand 420 states and 671 transitions. Second operand 6 states. [2019-10-15 00:04:26,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:26,665 INFO L93 Difference]: Finished difference Result 1255 states and 2035 transitions. [2019-10-15 00:04:26,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-15 00:04:26,666 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2019-10-15 00:04:26,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:26,673 INFO L225 Difference]: With dead ends: 1255 [2019-10-15 00:04:26,673 INFO L226 Difference]: Without dead ends: 841 [2019-10-15 00:04:26,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:04:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 841 states. [2019-10-15 00:04:26,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 841 to 817. [2019-10-15 00:04:26,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 817 states. [2019-10-15 00:04:26,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1174 transitions. [2019-10-15 00:04:26,711 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1174 transitions. Word has length 134 [2019-10-15 00:04:26,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:26,712 INFO L462 AbstractCegarLoop]: Abstraction has 817 states and 1174 transitions. [2019-10-15 00:04:26,712 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:26,712 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1174 transitions. [2019-10-15 00:04:26,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:04:26,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:26,714 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, 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] [2019-10-15 00:04:26,714 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:26,715 INFO L82 PathProgramCache]: Analyzing trace with hash 578512354, now seen corresponding path program 1 times [2019-10-15 00:04:26,715 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:26,715 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116162143] [2019-10-15 00:04:26,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:26,716 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:26,716 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:26,854 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:26,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116162143] [2019-10-15 00:04:26,855 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:26,855 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:04:26,855 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375407649] [2019-10-15 00:04:26,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:04:26,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:26,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:04:26,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:04:26,857 INFO L87 Difference]: Start difference. First operand 817 states and 1174 transitions. Second operand 6 states. [2019-10-15 00:04:28,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:28,495 INFO L93 Difference]: Finished difference Result 2046 states and 2973 transitions. [2019-10-15 00:04:28,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:04:28,501 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 137 [2019-10-15 00:04:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:28,509 INFO L225 Difference]: With dead ends: 2046 [2019-10-15 00:04:28,510 INFO L226 Difference]: Without dead ends: 1235 [2019-10-15 00:04:28,512 INFO L600 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 [2019-10-15 00:04:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1235 states. [2019-10-15 00:04:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1235 to 1221. [2019-10-15 00:04:28,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1221 states. [2019-10-15 00:04:28,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1725 transitions. [2019-10-15 00:04:28,554 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1725 transitions. Word has length 137 [2019-10-15 00:04:28,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:28,555 INFO L462 AbstractCegarLoop]: Abstraction has 1221 states and 1725 transitions. [2019-10-15 00:04:28,555 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:04:28,555 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1725 transitions. [2019-10-15 00:04:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-15 00:04:28,557 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:28,557 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, 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 00:04:28,558 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:28,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:28,558 INFO L82 PathProgramCache]: Analyzing trace with hash -2098670063, now seen corresponding path program 1 times [2019-10-15 00:04:28,559 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:28,559 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775508202] [2019-10-15 00:04:28,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:28,559 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:28,559 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:28,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:28,852 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:28,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775508202] [2019-10-15 00:04:28,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785632528] [2019-10-15 00:04:28,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:28,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-15 00:04:28,958 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:29,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:29,145 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:29,146 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:29,340 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2019-10-15 00:04:29,381 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,383 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:29,395 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,398 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-15 00:04:29,401 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-15 00:04:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:29,588 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:04:29,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 13 [2019-10-15 00:04:29,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928972756] [2019-10-15 00:04:29,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-15 00:04:29,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:29,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-15 00:04:29,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:04:29,592 INFO L87 Difference]: Start difference. First operand 1221 states and 1725 transitions. Second operand 7 states. [2019-10-15 00:04:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:32,173 INFO L93 Difference]: Finished difference Result 4051 states and 6044 transitions. [2019-10-15 00:04:32,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-15 00:04:32,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2019-10-15 00:04:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:32,194 INFO L225 Difference]: With dead ends: 4051 [2019-10-15 00:04:32,195 INFO L226 Difference]: Without dead ends: 2836 [2019-10-15 00:04:32,199 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 273 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2019-10-15 00:04:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-15 00:04:32,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2789. [2019-10-15 00:04:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2789 states. [2019-10-15 00:04:32,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 3710 transitions. [2019-10-15 00:04:32,321 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 3710 transitions. Word has length 138 [2019-10-15 00:04:32,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:32,321 INFO L462 AbstractCegarLoop]: Abstraction has 2789 states and 3710 transitions. [2019-10-15 00:04:32,321 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-15 00:04:32,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 3710 transitions. [2019-10-15 00:04:32,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2019-10-15 00:04:32,324 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:32,324 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:32,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:32,533 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:32,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:32,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1755774456, now seen corresponding path program 1 times [2019-10-15 00:04:32,534 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:32,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806718829] [2019-10-15 00:04:32,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:32,534 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:32,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:32,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:32,686 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:32,687 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806718829] [2019-10-15 00:04:32,687 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:32,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:04:32,688 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252940474] [2019-10-15 00:04:32,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:04:32,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:04:32,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:32,689 INFO L87 Difference]: Start difference. First operand 2789 states and 3710 transitions. Second operand 3 states. [2019-10-15 00:04:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:33,664 INFO L93 Difference]: Finished difference Result 7093 states and 9721 transitions. [2019-10-15 00:04:33,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:04:33,667 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 196 [2019-10-15 00:04:33,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:33,693 INFO L225 Difference]: With dead ends: 7093 [2019-10-15 00:04:33,693 INFO L226 Difference]: Without dead ends: 4310 [2019-10-15 00:04:33,702 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:04:33,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-10-15 00:04:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4310. [2019-10-15 00:04:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4310 states. [2019-10-15 00:04:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4310 states to 4310 states and 5505 transitions. [2019-10-15 00:04:33,872 INFO L78 Accepts]: Start accepts. Automaton has 4310 states and 5505 transitions. Word has length 196 [2019-10-15 00:04:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:33,873 INFO L462 AbstractCegarLoop]: Abstraction has 4310 states and 5505 transitions. [2019-10-15 00:04:33,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:04:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4310 states and 5505 transitions. [2019-10-15 00:04:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-10-15 00:04:33,880 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:33,881 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:04:33,881 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:33,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2033318321, now seen corresponding path program 1 times [2019-10-15 00:04:33,882 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:33,882 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007114741] [2019-10-15 00:04:33,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:33,882 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:33,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:33,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:34,077 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:34,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007114741] [2019-10-15 00:04:34,078 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:04:34,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:04:34,078 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401633045] [2019-10-15 00:04:34,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:04:34,079 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:04:34,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:04:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:04:34,087 INFO L87 Difference]: Start difference. First operand 4310 states and 5505 transitions. Second operand 4 states. [2019-10-15 00:04:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:04:35,944 INFO L93 Difference]: Finished difference Result 11285 states and 14911 transitions. [2019-10-15 00:04:35,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:04:35,946 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 212 [2019-10-15 00:04:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:04:35,985 INFO L225 Difference]: With dead ends: 11285 [2019-10-15 00:04:35,986 INFO L226 Difference]: Without dead ends: 6981 [2019-10-15 00:04:35,998 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 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 00:04:36,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6981 states. [2019-10-15 00:04:36,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6981 to 5830. [2019-10-15 00:04:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5830 states. [2019-10-15 00:04:36,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5830 states to 5830 states and 7357 transitions. [2019-10-15 00:04:36,171 INFO L78 Accepts]: Start accepts. Automaton has 5830 states and 7357 transitions. Word has length 212 [2019-10-15 00:04:36,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:04:36,172 INFO L462 AbstractCegarLoop]: Abstraction has 5830 states and 7357 transitions. [2019-10-15 00:04:36,172 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:04:36,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5830 states and 7357 transitions. [2019-10-15 00:04:36,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-15 00:04:36,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:04:36,180 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-15 00:04:36,180 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:04:36,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:04:36,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1831339210, now seen corresponding path program 1 times [2019-10-15 00:04:36,181 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:04:36,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925014287] [2019-10-15 00:04:36,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,182 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:04:36,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:04:36,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:36,492 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:36,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925014287] [2019-10-15 00:04:36,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053523179] [2019-10-15 00:04:36,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:04:36,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:04:36,598 INFO L256 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:04:36,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:04:36,687 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:36,687 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:04:36,886 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:04:36,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [758104555] [2019-10-15 00:04:36,893 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 293 [2019-10-15 00:04:36,949 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:04:36,949 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)