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/Problem14_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:51,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:51,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:51,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:51,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:51,852 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:51,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:51,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:51,868 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:51,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:51,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:51,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:51,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:51,877 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:51,880 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:51,881 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:51,883 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:51,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:51,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:51,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:51,893 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:51,896 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:51,899 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:51,900 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:51,903 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:51,908 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:51,910 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:51,911 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:51,912 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:51,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:51,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:51,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:51,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:51,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:51,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:51,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:51,918 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 [2019-10-13 18:02:51,949 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:51,949 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:51,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:51,951 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:51,951 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:51,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:51,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:51,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:51,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:51,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:51,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:51,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:51,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:51,955 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:51,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:51,955 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:51,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:51,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:51,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:51,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:51,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:51,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:51,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:51,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:51,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:51,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:51,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:51,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:51,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:52,240 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:52,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:52,261 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:52,263 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:52,263 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:52,264 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-13 18:02:52,340 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c3af4ead/7ed08aa92e7b41aeba112a6f4b51e803/FLAG63c6111a0 [2019-10-13 18:02:52,963 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:52,967 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-13 18:02:52,991 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c3af4ead/7ed08aa92e7b41aeba112a6f4b51e803/FLAG63c6111a0 [2019-10-13 18:02:53,192 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9c3af4ead/7ed08aa92e7b41aeba112a6f4b51e803 [2019-10-13 18:02:53,202 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:53,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:53,205 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:53,205 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:53,208 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:53,210 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:53" (1/1) ... [2019-10-13 18:02:53,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@517e93e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:53, skipping insertion in model container [2019-10-13 18:02:53,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:53" (1/1) ... [2019-10-13 18:02:53,224 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:53,287 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:53,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:53,925 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:54,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:54,081 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:54,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54 WrapperNode [2019-10-13 18:02:54,082 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:54,083 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:54,083 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:54,083 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:54,097 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,097 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,123 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,186 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (1/1) ... [2019-10-13 18:02:54,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:54,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:54,229 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:54,229 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:54,230 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (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 [2019-10-13 18:02:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:54,315 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:54,316 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:54,316 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:54,317 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:54,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:55,851 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:55,852 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:55,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:55 BoogieIcfgContainer [2019-10-13 18:02:55,856 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:55,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:55,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:55,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:55,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:53" (1/3) ... [2019-10-13 18:02:55,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:55, skipping insertion in model container [2019-10-13 18:02:55,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:54" (2/3) ... [2019-10-13 18:02:55,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e8a90f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:55, skipping insertion in model container [2019-10-13 18:02:55,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:55" (3/3) ... [2019-10-13 18:02:55,872 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label29.c [2019-10-13 18:02:55,886 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:55,896 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:55,908 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:55,953 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:55,953 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:55,953 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:55,954 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:55,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:55,954 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:55,954 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:55,955 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:55,982 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:55,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 18:02:55,989 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:55,990 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] [2019-10-13 18:02:55,992 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:55,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1085195851, now seen corresponding path program 1 times [2019-10-13 18:02:56,007 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:56,008 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611085591] [2019-10-13 18:02:56,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:56,008 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:56,008 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:56,274 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611085591] [2019-10-13 18:02:56,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:56,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:56,276 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858617453] [2019-10-13 18:02:56,280 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:56,281 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:56,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:56,298 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:01,138 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-13 18:03:01,139 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:01,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-13 18:03:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:01,163 INFO L225 Difference]: With dead ends: 902 [2019-10-13 18:03:01,163 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:01,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:01,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:01,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:03:01,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:03:01,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-13 18:03:01,270 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 22 [2019-10-13 18:03:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:01,271 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-13 18:03:01,271 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-13 18:03:01,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:03:01,278 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:01,279 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:01,279 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:01,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:01,280 INFO L82 PathProgramCache]: Analyzing trace with hash 503601434, now seen corresponding path program 1 times [2019-10-13 18:03:01,280 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:01,281 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148749367] [2019-10-13 18:03:01,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,281 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,281 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:01,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:01,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148749367] [2019-10-13 18:03:01,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579792964] [2019-10-13 18:03:01,598 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 [2019-10-13 18:03:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:01,725 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:01,799 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:01,800 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:01,800 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660862667] [2019-10-13 18:03:01,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:01,804 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:01,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:01,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:01,805 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-13 18:03:02,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:02,749 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-10-13 18:03:02,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:02,756 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-13 18:03:02,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:02,765 INFO L225 Difference]: With dead ends: 1666 [2019-10-13 18:03:02,765 INFO L226 Difference]: Without dead ends: 1112 [2019-10-13 18:03:02,768 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:02,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-13 18:03:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-13 18:03:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-13 18:03:02,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-10-13 18:03:02,836 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 134 [2019-10-13 18:03:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:02,840 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-10-13 18:03:02,840 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-10-13 18:03:02,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 18:03:02,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:02,850 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:03,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:03,056 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:03,057 INFO L82 PathProgramCache]: Analyzing trace with hash -859831850, now seen corresponding path program 1 times [2019-10-13 18:03:03,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:03,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745575693] [2019-10-13 18:03:03,057 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:03,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745575693] [2019-10-13 18:03:03,371 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682545652] [2019-10-13 18:03:03,371 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 [2019-10-13 18:03:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:03,469 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:03,524 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:03,524 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:03,524 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483930571] [2019-10-13 18:03:03,525 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:03,525 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:03,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:03,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:03,526 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-10-13 18:03:04,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:04,454 INFO L93 Difference]: Finished difference Result 1664 states and 2315 transitions. [2019-10-13 18:03:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:04,454 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2019-10-13 18:03:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:04,464 INFO L225 Difference]: With dead ends: 1664 [2019-10-13 18:03:04,464 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 18:03:04,466 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:04,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 18:03:04,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1296. [2019-10-13 18:03:04,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2019-10-13 18:03:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1824 transitions. [2019-10-13 18:03:04,526 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1824 transitions. Word has length 152 [2019-10-13 18:03:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:04,527 INFO L462 AbstractCegarLoop]: Abstraction has 1296 states and 1824 transitions. [2019-10-13 18:03:04,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1824 transitions. [2019-10-13 18:03:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-13 18:03:04,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:04,558 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:04,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:04,760 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:04,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:04,760 INFO L82 PathProgramCache]: Analyzing trace with hash 807627774, now seen corresponding path program 1 times [2019-10-13 18:03:04,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:04,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018812709] [2019-10-13 18:03:04,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:04,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,084 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:05,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018812709] [2019-10-13 18:03:05,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062604973] [2019-10-13 18:03:05,087 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 [2019-10-13 18:03:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:05,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:05,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:03:05,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:05,226 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:05,226 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936020974] [2019-10-13 18:03:05,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:05,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:05,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:05,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:05,228 INFO L87 Difference]: Start difference. First operand 1296 states and 1824 transitions. Second operand 3 states. [2019-10-13 18:03:06,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:06,063 INFO L93 Difference]: Finished difference Result 3874 states and 5517 transitions. [2019-10-13 18:03:06,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:06,066 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-10-13 18:03:06,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:06,083 INFO L225 Difference]: With dead ends: 3874 [2019-10-13 18:03:06,083 INFO L226 Difference]: Without dead ends: 2584 [2019-10-13 18:03:06,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:06,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2019-10-13 18:03:06,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1486. [2019-10-13 18:03:06,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2019-10-13 18:03:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2028 transitions. [2019-10-13 18:03:06,157 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2028 transitions. Word has length 207 [2019-10-13 18:03:06,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:06,158 INFO L462 AbstractCegarLoop]: Abstraction has 1486 states and 2028 transitions. [2019-10-13 18:03:06,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:06,159 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2028 transitions. [2019-10-13 18:03:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-13 18:03:06,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:06,165 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 18:03:06,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:06,370 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash -906411563, now seen corresponding path program 1 times [2019-10-13 18:03:06,371 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:06,371 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261238498] [2019-10-13 18:03:06,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:06,372 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:06,372 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:06,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261238498] [2019-10-13 18:03:06,927 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126727800] [2019-10-13 18:03:06,927 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 [2019-10-13 18:03:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:07,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:07,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:07,076 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 18:03:07,161 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:07,161 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 18:03:07,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138337908] [2019-10-13 18:03:07,162 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:07,162 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:07,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:07,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:07,163 INFO L87 Difference]: Start difference. First operand 1486 states and 2028 transitions. Second operand 5 states. [2019-10-13 18:03:08,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:08,518 INFO L93 Difference]: Finished difference Result 3548 states and 4771 transitions. [2019-10-13 18:03:08,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:08,525 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2019-10-13 18:03:08,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:08,535 INFO L225 Difference]: With dead ends: 3548 [2019-10-13 18:03:08,535 INFO L226 Difference]: Without dead ends: 1884 [2019-10-13 18:03:08,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2019-10-13 18:03:08,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1872. [2019-10-13 18:03:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2019-10-13 18:03:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2482 transitions. [2019-10-13 18:03:08,592 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2482 transitions. Word has length 208 [2019-10-13 18:03:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:08,592 INFO L462 AbstractCegarLoop]: Abstraction has 1872 states and 2482 transitions. [2019-10-13 18:03:08,592 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2482 transitions. [2019-10-13 18:03:08,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-13 18:03:08,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:08,598 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:03:08,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:08,803 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:08,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:08,804 INFO L82 PathProgramCache]: Analyzing trace with hash -616807464, now seen corresponding path program 1 times [2019-10-13 18:03:08,805 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:08,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339554871] [2019-10-13 18:03:08,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:08,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:08,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:08,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:08,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:08,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:08,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-13 18:03:09,141 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339554871] [2019-10-13 18:03:09,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847770339] [2019-10-13 18:03:09,142 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 [2019-10-13 18:03:09,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,250 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:09,254 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:09,348 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:03:09,348 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:09,349 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 18:03:09,349 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036042113] [2019-10-13 18:03:09,351 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:09,351 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:09,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-13 18:03:09,352 INFO L87 Difference]: Start difference. First operand 1872 states and 2482 transitions. Second operand 5 states. [2019-10-13 18:03:10,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:10,653 INFO L93 Difference]: Finished difference Result 4520 states and 6439 transitions. [2019-10-13 18:03:10,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:10,653 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-13 18:03:10,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:10,669 INFO L225 Difference]: With dead ends: 4520 [2019-10-13 18:03:10,669 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 18:03:10,675 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 18:03:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2808. [2019-10-13 18:03:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2019-10-13 18:03:10,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3720 transitions. [2019-10-13 18:03:10,770 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3720 transitions. Word has length 278 [2019-10-13 18:03:10,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:10,771 INFO L462 AbstractCegarLoop]: Abstraction has 2808 states and 3720 transitions. [2019-10-13 18:03:10,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3720 transitions. [2019-10-13 18:03:10,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-13 18:03:10,783 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:10,783 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 18:03:10,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:10,988 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:10,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:10,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1461451740, now seen corresponding path program 1 times [2019-10-13 18:03:10,989 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:10,990 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640316861] [2019-10-13 18:03:10,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,990 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:10,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,538 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 55 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:12,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640316861] [2019-10-13 18:03:12,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916557652] [2019-10-13 18:03:12,539 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 [2019-10-13 18:03:12,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:12,639 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:12,726 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:12,936 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 208 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 18:03:12,936 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:12,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:12,936 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073997814] [2019-10-13 18:03:12,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:12,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:12,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:12,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:12,938 INFO L87 Difference]: Start difference. First operand 2808 states and 3720 transitions. Second operand 16 states. [2019-10-13 18:03:17,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:17,171 INFO L93 Difference]: Finished difference Result 5529 states and 7410 transitions. [2019-10-13 18:03:17,171 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:03:17,171 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 292 [2019-10-13 18:03:17,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:17,190 INFO L225 Difference]: With dead ends: 5529 [2019-10-13 18:03:17,190 INFO L226 Difference]: Without dead ends: 3046 [2019-10-13 18:03:17,202 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:03:17,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2019-10-13 18:03:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2998. [2019-10-13 18:03:17,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2998 states. [2019-10-13 18:03:17,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3641 transitions. [2019-10-13 18:03:17,334 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3641 transitions. Word has length 292 [2019-10-13 18:03:17,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:17,335 INFO L462 AbstractCegarLoop]: Abstraction has 2998 states and 3641 transitions. [2019-10-13 18:03:17,335 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:17,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3641 transitions. [2019-10-13 18:03:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-13 18:03:17,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:17,348 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:17,554 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:17,554 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:17,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash -370135057, now seen corresponding path program 1 times [2019-10-13 18:03:17,559 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:17,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728682838] [2019-10-13 18:03:17,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:17,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:17,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-13 18:03:18,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728682838] [2019-10-13 18:03:18,225 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461343628] [2019-10-13 18:03:18,226 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 [2019-10-13 18:03:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:18,326 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:18,331 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:18,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-13 18:03:18,455 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:18,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 18:03:18,456 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282374477] [2019-10-13 18:03:18,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:18,457 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:18,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:18,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:03:18,457 INFO L87 Difference]: Start difference. First operand 2998 states and 3641 transitions. Second operand 5 states. [2019-10-13 18:03:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:19,558 INFO L93 Difference]: Finished difference Result 6190 states and 7685 transitions. [2019-10-13 18:03:19,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:19,562 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2019-10-13 18:03:19,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:19,576 INFO L225 Difference]: With dead ends: 6190 [2019-10-13 18:03:19,577 INFO L226 Difference]: Without dead ends: 3564 [2019-10-13 18:03:19,584 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2019-10-13 18:03:19,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3380. [2019-10-13 18:03:19,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3380 states. [2019-10-13 18:03:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4076 transitions. [2019-10-13 18:03:19,669 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4076 transitions. Word has length 317 [2019-10-13 18:03:19,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:19,670 INFO L462 AbstractCegarLoop]: Abstraction has 3380 states and 4076 transitions. [2019-10-13 18:03:19,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4076 transitions. [2019-10-13 18:03:19,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-10-13 18:03:19,678 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:19,679 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:19,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:19,891 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash -59587684, now seen corresponding path program 1 times [2019-10-13 18:03:19,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:19,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142811010] [2019-10-13 18:03:19,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,644 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 286 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 18:03:20,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142811010] [2019-10-13 18:03:20,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492010265] [2019-10-13 18:03:20,645 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 [2019-10-13 18:03:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,778 INFO L256 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:20,783 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:20,885 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-13 18:03:20,885 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:20,885 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:20,886 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523847239] [2019-10-13 18:03:20,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:20,887 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:20,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:20,888 INFO L87 Difference]: Start difference. First operand 3380 states and 4076 transitions. Second operand 9 states. [2019-10-13 18:03:23,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:23,121 INFO L93 Difference]: Finished difference Result 7500 states and 9131 transitions. [2019-10-13 18:03:23,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:03:23,121 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 427 [2019-10-13 18:03:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:23,139 INFO L225 Difference]: With dead ends: 7500 [2019-10-13 18:03:23,139 INFO L226 Difference]: Without dead ends: 4122 [2019-10-13 18:03:23,148 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 440 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:23,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2019-10-13 18:03:23,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2019-10-13 18:03:23,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4122 states. [2019-10-13 18:03:23,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4829 transitions. [2019-10-13 18:03:23,247 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4829 transitions. Word has length 427 [2019-10-13 18:03:23,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:23,249 INFO L462 AbstractCegarLoop]: Abstraction has 4122 states and 4829 transitions. [2019-10-13 18:03:23,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:23,249 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4829 transitions. [2019-10-13 18:03:23,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2019-10-13 18:03:23,268 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:23,268 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:23,472 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:23,473 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:23,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:23,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1728846883, now seen corresponding path program 1 times [2019-10-13 18:03:23,474 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:23,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210714910] [2019-10-13 18:03:23,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:23,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:23,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 393 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-13 18:03:24,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210714910] [2019-10-13 18:03:24,805 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034754787] [2019-10-13 18:03:24,805 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 [2019-10-13 18:03:24,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:24,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:24,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:25,005 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:25,260 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 662 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 18:03:25,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:25,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:25,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896410540] [2019-10-13 18:03:25,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:25,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:25,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:25,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:25,263 INFO L87 Difference]: Start difference. First operand 4122 states and 4829 transitions. Second operand 12 states. [2019-10-13 18:03:27,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:27,353 INFO L93 Difference]: Finished difference Result 7941 states and 9369 transitions. [2019-10-13 18:03:27,353 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:27,353 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 511 [2019-10-13 18:03:27,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:27,369 INFO L225 Difference]: With dead ends: 7941 [2019-10-13 18:03:27,369 INFO L226 Difference]: Without dead ends: 4148 [2019-10-13 18:03:27,378 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2019-10-13 18:03:27,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4114. [2019-10-13 18:03:27,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4114 states. [2019-10-13 18:03:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 4635 transitions. [2019-10-13 18:03:27,456 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 4635 transitions. Word has length 511 [2019-10-13 18:03:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:27,456 INFO L462 AbstractCegarLoop]: Abstraction has 4114 states and 4635 transitions. [2019-10-13 18:03:27,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:27,457 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 4635 transitions. [2019-10-13 18:03:27,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-10-13 18:03:27,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:27,470 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:27,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:27,674 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2077729423, now seen corresponding path program 2 times [2019-10-13 18:03:27,675 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:27,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168346565] [2019-10-13 18:03:27,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat