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 -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label21.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:51:40,811 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:51:40,814 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:51:40,825 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:51:40,826 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:51:40,827 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:51:40,828 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:51:40,830 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:51:40,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:51:40,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:51:40,833 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:51:40,834 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:51:40,835 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:51:40,836 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:51:40,836 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:51:40,838 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:51:40,838 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:51:40,839 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:51:40,841 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:51:40,843 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:51:40,844 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:51:40,845 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:51:40,846 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:51:40,847 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:51:40,849 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:51:40,852 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:51:40,853 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:51:40,854 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:51:40,854 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:51:40,855 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:51:40,856 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:51:40,856 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:51:40,857 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:51:40,857 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:51:40,858 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:51:40,858 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:51:40,859 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:51:40,873 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:51:40,873 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:51:40,874 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:51:40,875 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:51:40,875 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:51:40,875 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:51:40,875 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:51:40,876 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:51:40,876 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:51:40,876 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:51:40,876 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:51:40,876 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:51:40,877 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:51:40,877 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:51:40,877 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:51:40,877 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:51:40,877 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:51:40,878 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:51:40,878 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:51:40,878 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:51:40,878 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:51:40,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:40,879 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:51:40,879 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:51:40,879 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:51:40,879 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:51:40,879 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:51:40,880 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:51:40,880 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:51:41,168 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:51:41,180 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:51:41,183 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:51:41,185 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:51:41,185 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:51:41,186 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-10-14 21:51:41,252 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff65f9419/32730219fa2d44139d928b9b8468923a/FLAG411eae878 [2019-10-14 21:51:41,877 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:51:41,878 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label21.c [2019-10-14 21:51:41,891 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff65f9419/32730219fa2d44139d928b9b8468923a/FLAG411eae878 [2019-10-14 21:51:42,139 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ff65f9419/32730219fa2d44139d928b9b8468923a [2019-10-14 21:51:42,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:51:42,151 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:51:42,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:42,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:51:42,155 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:51:42,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,159 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@681de4fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42, skipping insertion in model container [2019-10-14 21:51:42,159 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,166 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:51:42,216 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:51:42,697 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:42,704 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:51:42,824 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:42,849 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:51:42,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42 WrapperNode [2019-10-14 21:51:42,850 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:42,851 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:51:42,851 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:51:42,851 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:51:42,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,960 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... [2019-10-14 21:51:42,966 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:51:42,967 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:51:42,967 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:51:42,967 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:51:42,968 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:43,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:51:43,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:51:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:51:43,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:51:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:51:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:51:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:51:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:51:43,024 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:51:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:51:43,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:51:44,156 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:51:44,156 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:51:44,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:44 BoogieIcfgContainer [2019-10-14 21:51:44,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:51:44,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:51:44,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:51:44,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:51:44,162 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:51:42" (1/3) ... [2019-10-14 21:51:44,163 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101b0b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:44, skipping insertion in model container [2019-10-14 21:51:44,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:42" (2/3) ... [2019-10-14 21:51:44,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101b0b10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:44, skipping insertion in model container [2019-10-14 21:51:44,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:44" (3/3) ... [2019-10-14 21:51:44,166 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label21.c [2019-10-14 21:51:44,175 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:51:44,183 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:51:44,194 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:51:44,218 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:51:44,218 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:51:44,219 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:51:44,219 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:51:44,220 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:51:44,221 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:51:44,221 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:51:44,221 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:51:44,242 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 21:51:44,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-10-14 21:51:44,251 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:44,251 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:44,253 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:44,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1860977577, now seen corresponding path program 1 times [2019-10-14 21:51:44,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:44,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20365330] [2019-10-14 21:51:44,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:44,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:44,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:44,838 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20365330] [2019-10-14 21:51:44,839 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:44,840 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:51:44,840 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736458689] [2019-10-14 21:51:44,847 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:51:44,848 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:44,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:51:44,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:51:44,864 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2019-10-14 21:51:46,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:46,812 INFO L93 Difference]: Finished difference Result 723 states and 1255 transitions. [2019-10-14 21:51:46,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:51:46,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2019-10-14 21:51:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:46,833 INFO L225 Difference]: With dead ends: 723 [2019-10-14 21:51:46,833 INFO L226 Difference]: Without dead ends: 423 [2019-10-14 21:51:46,841 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:51:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2019-10-14 21:51:46,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 417. [2019-10-14 21:51:46,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-10-14 21:51:46,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 584 transitions. [2019-10-14 21:51:46,924 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 584 transitions. Word has length 89 [2019-10-14 21:51:46,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:46,925 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 584 transitions. [2019-10-14 21:51:46,926 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:51:46,926 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 584 transitions. [2019-10-14 21:51:46,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-14 21:51:46,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:46,932 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:46,933 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:46,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:46,933 INFO L82 PathProgramCache]: Analyzing trace with hash 64410272, now seen corresponding path program 1 times [2019-10-14 21:51:46,933 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:46,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210802985] [2019-10-14 21:51:46,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,934 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,934 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:47,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210802985] [2019-10-14 21:51:47,104 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:47,104 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:51:47,104 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30044826] [2019-10-14 21:51:47,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:51:47,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:47,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:51:47,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:47,108 INFO L87 Difference]: Start difference. First operand 417 states and 584 transitions. Second operand 9 states. [2019-10-14 21:51:48,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:48,448 INFO L93 Difference]: Finished difference Result 1269 states and 1843 transitions. [2019-10-14 21:51:48,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:48,449 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 99 [2019-10-14 21:51:48,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:48,458 INFO L225 Difference]: With dead ends: 1269 [2019-10-14 21:51:48,458 INFO L226 Difference]: Without dead ends: 858 [2019-10-14 21:51:48,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:51:48,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2019-10-14 21:51:48,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 834. [2019-10-14 21:51:48,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 834 states. [2019-10-14 21:51:48,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1168 transitions. [2019-10-14 21:51:48,530 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1168 transitions. Word has length 99 [2019-10-14 21:51:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:48,531 INFO L462 AbstractCegarLoop]: Abstraction has 834 states and 1168 transitions. [2019-10-14 21:51:48,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:51:48,531 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1168 transitions. [2019-10-14 21:51:48,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-10-14 21:51:48,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:48,539 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:48,539 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:48,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:48,540 INFO L82 PathProgramCache]: Analyzing trace with hash 899392414, now seen corresponding path program 1 times [2019-10-14 21:51:48,540 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:48,540 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526430478] [2019-10-14 21:51:48,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:48,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:48,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:48,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:48,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526430478] [2019-10-14 21:51:48,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130915760] [2019-10-14 21:51:48,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:48,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:48,847 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:48,922 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:48,923 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:48,923 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:51:48,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160792411] [2019-10-14 21:51:48,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:48,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:48,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:48,925 INFO L87 Difference]: Start difference. First operand 834 states and 1168 transitions. Second operand 3 states. [2019-10-14 21:51:49,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:49,417 INFO L93 Difference]: Finished difference Result 2073 states and 2931 transitions. [2019-10-14 21:51:49,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:49,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2019-10-14 21:51:49,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:49,425 INFO L225 Difference]: With dead ends: 2073 [2019-10-14 21:51:49,426 INFO L226 Difference]: Without dead ends: 1245 [2019-10-14 21:51:49,428 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:49,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2019-10-14 21:51:49,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1245. [2019-10-14 21:51:49,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1245 states. [2019-10-14 21:51:49,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 1694 transitions. [2019-10-14 21:51:49,470 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 1694 transitions. Word has length 100 [2019-10-14 21:51:49,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:49,471 INFO L462 AbstractCegarLoop]: Abstraction has 1245 states and 1694 transitions. [2019-10-14 21:51:49,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:49,471 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 1694 transitions. [2019-10-14 21:51:49,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-14 21:51:49,475 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:49,475 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:51:49,679 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:49,680 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:49,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:49,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1802371290, now seen corresponding path program 1 times [2019-10-14 21:51:49,680 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:49,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202315562] [2019-10-14 21:51:49,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:49,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:49,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:49,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:49,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202315562] [2019-10-14 21:51:49,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400041519] [2019-10-14 21:51:49,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:49,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:49,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:49,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:50,007 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:50,008 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:51:50,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675711075] [2019-10-14 21:51:50,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:50,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:50,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:50,010 INFO L87 Difference]: Start difference. First operand 1245 states and 1694 transitions. Second operand 3 states. [2019-10-14 21:51:50,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:50,482 INFO L93 Difference]: Finished difference Result 2895 states and 4002 transitions. [2019-10-14 21:51:50,485 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:50,485 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2019-10-14 21:51:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:50,497 INFO L225 Difference]: With dead ends: 2895 [2019-10-14 21:51:50,497 INFO L226 Difference]: Without dead ends: 1656 [2019-10-14 21:51:50,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2019-10-14 21:51:50,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1656. [2019-10-14 21:51:50,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1656 states. [2019-10-14 21:51:50,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2202 transitions. [2019-10-14 21:51:50,562 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2202 transitions. Word has length 104 [2019-10-14 21:51:50,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:50,563 INFO L462 AbstractCegarLoop]: Abstraction has 1656 states and 2202 transitions. [2019-10-14 21:51:50,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:50,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2202 transitions. [2019-10-14 21:51:50,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 21:51:50,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:50,569 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:50,773 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:50,774 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:50,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:50,774 INFO L82 PathProgramCache]: Analyzing trace with hash 440143631, now seen corresponding path program 1 times [2019-10-14 21:51:50,774 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:50,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942063753] [2019-10-14 21:51:50,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:50,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:50,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:50,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:50,972 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:50,973 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942063753] [2019-10-14 21:51:50,974 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517348514] [2019-10-14 21:51:50,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:51,067 INFO L256 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:51,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:51,138 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:51:51,138 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:51,138 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:51:51,138 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936576500] [2019-10-14 21:51:51,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:51,140 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:51,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:51,141 INFO L87 Difference]: Start difference. First operand 1656 states and 2202 transitions. Second operand 3 states. [2019-10-14 21:51:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:51,633 INFO L93 Difference]: Finished difference Result 3306 states and 4417 transitions. [2019-10-14 21:51:51,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:51,634 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-14 21:51:51,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:51,643 INFO L225 Difference]: With dead ends: 3306 [2019-10-14 21:51:51,643 INFO L226 Difference]: Without dead ends: 1656 [2019-10-14 21:51:51,647 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2019-10-14 21:51:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1656. [2019-10-14 21:51:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1656 states. [2019-10-14 21:51:51,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 2113 transitions. [2019-10-14 21:51:51,698 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 2113 transitions. Word has length 123 [2019-10-14 21:51:51,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:51,698 INFO L462 AbstractCegarLoop]: Abstraction has 1656 states and 2113 transitions. [2019-10-14 21:51:51,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:51,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 2113 transitions. [2019-10-14 21:51:51,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 21:51:51,702 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:51,703 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 21:51:51,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:51,915 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1837248573, now seen corresponding path program 1 times [2019-10-14 21:51:51,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:51,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122595179] [2019-10-14 21:51:51,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:51,916 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:51,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:51,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,097 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:51:52,097 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122595179] [2019-10-14 21:51:52,098 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742421429] [2019-10-14 21:51:52,098 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:52,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:52,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:52,231 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:51:52,232 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:52,232 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:51:52,233 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100889787] [2019-10-14 21:51:52,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:52,235 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:52,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:51:52,236 INFO L87 Difference]: Start difference. First operand 1656 states and 2113 transitions. Second operand 3 states. [2019-10-14 21:51:52,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:52,753 INFO L93 Difference]: Finished difference Result 4126 states and 5318 transitions. [2019-10-14 21:51:52,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:52,753 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-14 21:51:52,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:52,766 INFO L225 Difference]: With dead ends: 4126 [2019-10-14 21:51:52,766 INFO L226 Difference]: Without dead ends: 2476 [2019-10-14 21:51:52,771 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:51:52,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2019-10-14 21:51:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 2069. [2019-10-14 21:51:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-14 21:51:52,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 2647 transitions. [2019-10-14 21:51:52,837 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 2647 transitions. Word has length 124 [2019-10-14 21:51:52,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:52,838 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 2647 transitions. [2019-10-14 21:51:52,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:52,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 2647 transitions. [2019-10-14 21:51:52,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 21:51:52,842 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:52,843 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:53,051 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:53,052 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:53,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:53,052 INFO L82 PathProgramCache]: Analyzing trace with hash -715011120, now seen corresponding path program 1 times [2019-10-14 21:51:53,052 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:53,053 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92423935] [2019-10-14 21:51:53,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:53,053 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:53,053 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:53,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:53,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:53,193 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:53,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92423935] [2019-10-14 21:51:53,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842710700] [2019-10-14 21:51:53,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:53,271 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:51:53,274 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:53,292 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:53,292 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:51:53,293 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790476898] [2019-10-14 21:51:53,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:53,293 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:53,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:53,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:51:53,294 INFO L87 Difference]: Start difference. First operand 2069 states and 2647 transitions. Second operand 3 states. [2019-10-14 21:51:53,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:53,770 INFO L93 Difference]: Finished difference Result 5363 states and 6990 transitions. [2019-10-14 21:51:53,770 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:53,770 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 123 [2019-10-14 21:51:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:53,787 INFO L225 Difference]: With dead ends: 5363 [2019-10-14 21:51:53,787 INFO L226 Difference]: Without dead ends: 3300 [2019-10-14 21:51:53,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:51:53,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3300 states. [2019-10-14 21:51:53,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3300 to 3161. [2019-10-14 21:51:53,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3161 states. [2019-10-14 21:51:53,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 4057 transitions. [2019-10-14 21:51:53,936 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 4057 transitions. Word has length 123 [2019-10-14 21:51:53,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:53,937 INFO L462 AbstractCegarLoop]: Abstraction has 3161 states and 4057 transitions. [2019-10-14 21:51:53,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:53,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 4057 transitions. [2019-10-14 21:51:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 21:51:53,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:53,951 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, 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] [2019-10-14 21:51:54,161 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:54,162 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:54,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:54,163 INFO L82 PathProgramCache]: Analyzing trace with hash -2016706982, now seen corresponding path program 1 times [2019-10-14 21:51:54,163 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:54,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922350297] [2019-10-14 21:51:54,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,164 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:54,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:54,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922350297] [2019-10-14 21:51:54,485 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:54,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 21:51:54,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313370819] [2019-10-14 21:51:54,486 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:51:54,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:54,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:51:54,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:51:54,487 INFO L87 Difference]: Start difference. First operand 3161 states and 4057 transitions. Second operand 10 states. [2019-10-14 21:51:56,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:56,336 INFO L93 Difference]: Finished difference Result 7180 states and 9292 transitions. [2019-10-14 21:51:56,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:51:56,337 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 162 [2019-10-14 21:51:56,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:56,355 INFO L225 Difference]: With dead ends: 7180 [2019-10-14 21:51:56,355 INFO L226 Difference]: Without dead ends: 4025 [2019-10-14 21:51:56,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:51:56,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4025 states. [2019-10-14 21:51:56,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4025 to 3185. [2019-10-14 21:51:56,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3185 states. [2019-10-14 21:51:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 3929 transitions. [2019-10-14 21:51:56,451 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 3929 transitions. Word has length 162 [2019-10-14 21:51:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:56,451 INFO L462 AbstractCegarLoop]: Abstraction has 3185 states and 3929 transitions. [2019-10-14 21:51:56,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:51:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 3929 transitions. [2019-10-14 21:51:56,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:51:56,460 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:56,460 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 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] [2019-10-14 21:51:56,461 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 155487987, now seen corresponding path program 1 times [2019-10-14 21:51:56,461 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:56,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750390711] [2019-10-14 21:51:56,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:56,462 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:56,462 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,760 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:56,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750390711] [2019-10-14 21:51:56,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646426338] [2019-10-14 21:51:56,761 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:56,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:56,859 INFO L256 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:51:56,864 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:56,971 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:56,971 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:56,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:51:56,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296506338] [2019-10-14 21:51:56,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:51:56,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:56,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:51:56,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:51:56,973 INFO L87 Difference]: Start difference. First operand 3185 states and 3929 transitions. Second operand 11 states. [2019-10-14 21:52:01,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:01,134 INFO L93 Difference]: Finished difference Result 7738 states and 9623 transitions. [2019-10-14 21:52:01,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:52:01,135 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 173 [2019-10-14 21:52:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:01,151 INFO L225 Difference]: With dead ends: 7738 [2019-10-14 21:52:01,151 INFO L226 Difference]: Without dead ends: 4001 [2019-10-14 21:52:01,160 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:52:01,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2019-10-14 21:52:01,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3721. [2019-10-14 21:52:01,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3721 states. [2019-10-14 21:52:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3721 states to 3721 states and 4202 transitions. [2019-10-14 21:52:01,246 INFO L78 Accepts]: Start accepts. Automaton has 3721 states and 4202 transitions. Word has length 173 [2019-10-14 21:52:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:01,246 INFO L462 AbstractCegarLoop]: Abstraction has 3721 states and 4202 transitions. [2019-10-14 21:52:01,246 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:52:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3721 states and 4202 transitions. [2019-10-14 21:52:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-10-14 21:52:01,258 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:01,259 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 21:52:01,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:01,463 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:01,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:01,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1184249373, now seen corresponding path program 1 times [2019-10-14 21:52:01,463 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:01,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150997119] [2019-10-14 21:52:01,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:01,464 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:01,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:01,935 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:52:01,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150997119] [2019-10-14 21:52:01,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779581616] [2019-10-14 21:52:01,936 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:02,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 21:52:02,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:02,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 21:52:02,259 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:52:02,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:52:02,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2019-10-14 21:52:02,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181898626] [2019-10-14 21:52:02,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:52:02,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:02,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:52:02,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:52:02,265 INFO L87 Difference]: Start difference. First operand 3721 states and 4202 transitions. Second operand 6 states. [2019-10-14 21:52:03,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:03,328 INFO L93 Difference]: Finished difference Result 7309 states and 8280 transitions. [2019-10-14 21:52:03,329 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:52:03,329 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 181 [2019-10-14 21:52:03,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:03,341 INFO L225 Difference]: With dead ends: 7309 [2019-10-14 21:52:03,341 INFO L226 Difference]: Without dead ends: 3729 [2019-10-14 21:52:03,348 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:52:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2019-10-14 21:52:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 3723. [2019-10-14 21:52:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3723 states. [2019-10-14 21:52:03,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 4184 transitions. [2019-10-14 21:52:03,424 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 4184 transitions. Word has length 181 [2019-10-14 21:52:03,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:03,424 INFO L462 AbstractCegarLoop]: Abstraction has 3723 states and 4184 transitions. [2019-10-14 21:52:03,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:52:03,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 4184 transitions. [2019-10-14 21:52:03,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-14 21:52:03,435 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:03,436 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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] [2019-10-14 21:52:03,640 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:03,641 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:03,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:03,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2133513752, now seen corresponding path program 1 times [2019-10-14 21:52:03,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:03,643 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33999908] [2019-10-14 21:52:03,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:03,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:03,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 100 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:52:03,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33999908] [2019-10-14 21:52:03,944 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141772406] [2019-10-14 21:52:03,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:04,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:52:04,053 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:04,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:52:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:52:04,133 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:04,133 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:52:04,133 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554463585] [2019-10-14 21:52:04,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:52:04,134 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:04,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:52:04,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:52:04,135 INFO L87 Difference]: Start difference. First operand 3723 states and 4184 transitions. Second operand 12 states. [2019-10-14 21:52:05,564 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-10-14 21:52:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:06,110 INFO L93 Difference]: Finished difference Result 7313 states and 8238 transitions. [2019-10-14 21:52:06,111 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:52:06,111 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 189 [2019-10-14 21:52:06,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:06,134 INFO L225 Difference]: With dead ends: 7313 [2019-10-14 21:52:06,134 INFO L226 Difference]: Without dead ends: 3731 [2019-10-14 21:52:06,142 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 203 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:52:06,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3731 states. [2019-10-14 21:52:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3731 to 3725. [2019-10-14 21:52:06,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3725 states. [2019-10-14 21:52:06,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3725 states to 3725 states and 4145 transitions. [2019-10-14 21:52:06,228 INFO L78 Accepts]: Start accepts. Automaton has 3725 states and 4145 transitions. Word has length 189 [2019-10-14 21:52:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:06,228 INFO L462 AbstractCegarLoop]: Abstraction has 3725 states and 4145 transitions. [2019-10-14 21:52:06,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:52:06,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3725 states and 4145 transitions. [2019-10-14 21:52:06,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:52:06,239 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:06,239 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:52:06,449 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:06,449 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -937296905, now seen corresponding path program 1 times [2019-10-14 21:52:06,450 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:06,450 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343379425] [2019-10-14 21:52:06,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:06,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:06,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,655 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 58 [2019-10-14 21:52:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:52:06,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343379425] [2019-10-14 21:52:06,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529352600] [2019-10-14 21:52:06,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:07,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:52:07,063 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 147 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:52:07,188 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:07,189 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:52:07,189 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376538040] [2019-10-14 21:52:07,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:52:07,191 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:07,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:52:07,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:52:07,197 INFO L87 Difference]: Start difference. First operand 3725 states and 4145 transitions. Second operand 12 states. [2019-10-14 21:52:08,925 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 25 [2019-10-14 21:52:09,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:09,440 INFO L93 Difference]: Finished difference Result 6136 states and 6853 transitions. [2019-10-14 21:52:09,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:52:09,440 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 203 [2019-10-14 21:52:09,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:09,448 INFO L225 Difference]: With dead ends: 6136 [2019-10-14 21:52:09,449 INFO L226 Difference]: Without dead ends: 3900 [2019-10-14 21:52:09,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=169, Invalid=481, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:52:09,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3900 states. [2019-10-14 21:52:09,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3900 to 2375. [2019-10-14 21:52:09,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2375 states. [2019-10-14 21:52:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2375 states to 2375 states and 2586 transitions. [2019-10-14 21:52:09,507 INFO L78 Accepts]: Start accepts. Automaton has 2375 states and 2586 transitions. Word has length 203 [2019-10-14 21:52:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:09,507 INFO L462 AbstractCegarLoop]: Abstraction has 2375 states and 2586 transitions. [2019-10-14 21:52:09,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:52:09,508 INFO L276 IsEmpty]: Start isEmpty. Operand 2375 states and 2586 transitions. [2019-10-14 21:52:09,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-14 21:52:09,515 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:09,516 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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, 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] [2019-10-14 21:52:09,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:09,720 INFO L410 AbstractCegarLoop]: === Iteration 13 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash 120068915, now seen corresponding path program 1 times [2019-10-14 21:52:09,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:09,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728664523] [2019-10-14 21:52:09,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:09,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:09,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:09,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:09,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:09,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 302 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:52:10,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728664523] [2019-10-14 21:52:10,979 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933452852] [2019-10-14 21:52:10,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:11,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:11,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:52:11,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:11,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:52:11,252 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 297 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:52:11,252 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:11,253 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-14 21:52:11,253 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048946675] [2019-10-14 21:52:11,255 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:52:11,255 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:52:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:52:11,256 INFO L87 Difference]: Start difference. First operand 2375 states and 2586 transitions. Second operand 16 states. [2019-10-14 21:52:11,602 WARN L191 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2019-10-14 21:52:11,766 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2019-10-14 21:52:12,389 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2019-10-14 21:52:12,520 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2019-10-14 21:52:12,814 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 80 [2019-10-14 21:52:13,243 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2019-10-14 21:52:13,501 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 71 [2019-10-14 21:52:14,347 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-10-14 21:52:15,049 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2019-10-14 21:52:15,306 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2019-10-14 21:52:15,611 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2019-10-14 21:52:15,957 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 81 [2019-10-14 21:52:16,347 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 78 [2019-10-14 21:52:16,475 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-10-14 21:52:16,810 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81