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_label58.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:38,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:38,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:38,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:38,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:38,863 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:38,866 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:38,877 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:38,882 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:38,885 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:38,887 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:38,889 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:38,889 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:38,891 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:38,894 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:38,896 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:38,897 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:38,898 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:38,900 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:38,905 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:38,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:38,914 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:38,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:38,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:38,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:38,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:02:38,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:02:38,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:02:38,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:02:38,930 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:02:38,931 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:02:38,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:02:38,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:02:38,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:38,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:38,934 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:38,935 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 22:02:38,968 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:38,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:38,970 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:38,970 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:38,970 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:38,971 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:38,971 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:38,971 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:38,971 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:38,972 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:38,972 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:38,972 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:38,972 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:38,972 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:38,973 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:38,973 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:38,973 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:38,973 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:38,973 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:38,974 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:38,974 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:38,974 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:38,974 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:38,974 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:38,975 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:38,975 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:38,975 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:38,975 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:38,975 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:39,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:39,307 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:39,311 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:39,312 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:39,313 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:39,313 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-14 22:02:39,382 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a9b6ebb/9800509667334624917f3ee6fa4ceb68/FLAG729362168 [2019-10-14 22:02:40,016 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:40,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label58.c [2019-10-14 22:02:40,034 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a9b6ebb/9800509667334624917f3ee6fa4ceb68/FLAG729362168 [2019-10-14 22:02:40,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c5a9b6ebb/9800509667334624917f3ee6fa4ceb68 [2019-10-14 22:02:40,227 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:40,228 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:40,231 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:40,232 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:40,236 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:40,237 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:40" (1/1) ... [2019-10-14 22:02:40,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@267e3b89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:40, skipping insertion in model container [2019-10-14 22:02:40,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:40" (1/1) ... [2019-10-14 22:02:40,251 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:40,324 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:40,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:40,880 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:41,135 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:41,159 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:41,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41 WrapperNode [2019-10-14 22:02:41,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:41,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:41,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:41,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:41,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,229 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,230 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,316 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (1/1) ... [2019-10-14 22:02:41,377 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:41,378 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:41,378 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:41,379 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:41,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (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 22:02:41,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:41,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:41,468 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:41,468 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:41,469 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:41,470 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:41,471 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:43,050 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:43,051 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:43,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:43 BoogieIcfgContainer [2019-10-14 22:02:43,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:43,057 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:43,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:43,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:43,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:40" (1/3) ... [2019-10-14 22:02:43,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecad0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:43, skipping insertion in model container [2019-10-14 22:02:43,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:41" (2/3) ... [2019-10-14 22:02:43,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ecad0bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:43, skipping insertion in model container [2019-10-14 22:02:43,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:43" (3/3) ... [2019-10-14 22:02:43,071 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label58.c [2019-10-14 22:02:43,083 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:43,097 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:43,111 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:43,152 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:43,152 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:43,154 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:43,154 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:43,154 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:43,154 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:43,154 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:43,155 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:43,181 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:43,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 22:02:43,188 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:43,189 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] [2019-10-14 22:02:43,191 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:43,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:43,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1699451235, now seen corresponding path program 1 times [2019-10-14 22:02:43,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:43,205 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746413240] [2019-10-14 22:02:43,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:43,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,491 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 22:02:43,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746413240] [2019-10-14 22:02:43,493 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:43,494 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:43,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092708481] [2019-10-14 22:02:43,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:43,500 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:43,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:43,516 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:46,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:46,402 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-14 22:02:46,402 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:46,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-14 22:02:46,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:46,432 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:02:46,432 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:46,441 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 [2019-10-14 22:02:46,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:46,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:02:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:02:46,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 812 transitions. [2019-10-14 22:02:46,559 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 812 transitions. Word has length 20 [2019-10-14 22:02:46,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:46,559 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 812 transitions. [2019-10-14 22:02:46,559 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 812 transitions. [2019-10-14 22:02:46,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 22:02:46,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:46,572 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:46,572 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:46,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:46,573 INFO L82 PathProgramCache]: Analyzing trace with hash 72862738, now seen corresponding path program 1 times [2019-10-14 22:02:46,573 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:46,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227748804] [2019-10-14 22:02:46,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:46,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:46,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:46,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227748804] [2019-10-14 22:02:46,884 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689519642] [2019-10-14 22:02:46,884 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 22:02:46,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,959 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:46,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:47,058 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:47,059 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:47,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:47,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333344229] [2019-10-14 22:02:47,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:47,062 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:47,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:47,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:47,063 INFO L87 Difference]: Start difference. First operand 560 states and 812 transitions. Second operand 3 states. [2019-10-14 22:02:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:47,842 INFO L93 Difference]: Finished difference Result 1114 states and 1633 transitions. [2019-10-14 22:02:47,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:47,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-14 22:02:47,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:47,851 INFO L225 Difference]: With dead ends: 1114 [2019-10-14 22:02:47,851 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:02:47,853 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 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 22:02:47,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:02:47,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 744. [2019-10-14 22:02:47,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-14 22:02:47,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1117 transitions. [2019-10-14 22:02:47,889 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1117 transitions. Word has length 132 [2019-10-14 22:02:47,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:47,892 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 1117 transitions. [2019-10-14 22:02:47,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:47,893 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1117 transitions. [2019-10-14 22:02:47,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-10-14 22:02:47,899 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:47,900 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-10-14 22:02:48,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:48,104 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:48,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:48,104 INFO L82 PathProgramCache]: Analyzing trace with hash -700382803, now seen corresponding path program 1 times [2019-10-14 22:02:48,105 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:48,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597167562] [2019-10-14 22:02:48,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,105 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,105 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:48,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,401 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:48,401 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597167562] [2019-10-14 22:02:48,402 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462451509] [2019-10-14 22:02:48,403 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 22:02:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,484 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:48,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:48,557 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:48,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:48,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305568233] [2019-10-14 22:02:48,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:48,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:48,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:48,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:48,561 INFO L87 Difference]: Start difference. First operand 744 states and 1117 transitions. Second operand 3 states. [2019-10-14 22:02:49,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:49,534 INFO L93 Difference]: Finished difference Result 1480 states and 2249 transitions. [2019-10-14 22:02:49,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:49,534 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 153 [2019-10-14 22:02:49,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:49,543 INFO L225 Difference]: With dead ends: 1480 [2019-10-14 22:02:49,543 INFO L226 Difference]: Without dead ends: 1478 [2019-10-14 22:02:49,544 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 156 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-10-14 22:02:49,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 930. [2019-10-14 22:02:49,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 930 states. [2019-10-14 22:02:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1428 transitions. [2019-10-14 22:02:49,581 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1428 transitions. Word has length 153 [2019-10-14 22:02:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:49,582 INFO L462 AbstractCegarLoop]: Abstraction has 930 states and 1428 transitions. [2019-10-14 22:02:49,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1428 transitions. [2019-10-14 22:02:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-10-14 22:02:49,586 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:49,587 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:49,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:49,794 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:49,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1417529771, now seen corresponding path program 1 times [2019-10-14 22:02:49,796 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:49,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448399564] [2019-10-14 22:02:49,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,797 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:49,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 109 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:50,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448399564] [2019-10-14 22:02:50,808 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010533934] [2019-10-14 22:02:50,808 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 22:02:50,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:50,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:50,958 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 22:02:51,087 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:51,087 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 15 [2019-10-14 22:02:51,088 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115860633] [2019-10-14 22:02:51,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:51,089 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:51,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:51,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:51,090 INFO L87 Difference]: Start difference. First operand 930 states and 1428 transitions. Second operand 5 states. [2019-10-14 22:02:52,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:52,427 INFO L93 Difference]: Finished difference Result 2064 states and 3140 transitions. [2019-10-14 22:02:52,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:52,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 218 [2019-10-14 22:02:52,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:52,441 INFO L225 Difference]: With dead ends: 2064 [2019-10-14 22:02:52,441 INFO L226 Difference]: Without dead ends: 1140 [2019-10-14 22:02:52,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-10-14 22:02:52,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2019-10-14 22:02:52,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 942. [2019-10-14 22:02:52,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 942 states. [2019-10-14 22:02:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 1355 transitions. [2019-10-14 22:02:52,506 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 1355 transitions. Word has length 218 [2019-10-14 22:02:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:52,507 INFO L462 AbstractCegarLoop]: Abstraction has 942 states and 1355 transitions. [2019-10-14 22:02:52,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:52,507 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 1355 transitions. [2019-10-14 22:02:52,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2019-10-14 22:02:52,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:52,519 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:52,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,732 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:52,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:52,734 INFO L82 PathProgramCache]: Analyzing trace with hash -214589256, now seen corresponding path program 1 times [2019-10-14 22:02:52,734 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:52,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281303218] [2019-10-14 22:02:52,734 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,735 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,735 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:53,018 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 39 proven. 130 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 22:02:53,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281303218] [2019-10-14 22:02:53,019 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721007049] [2019-10-14 22:02:53,019 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 22:02:53,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:53,123 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:53,128 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 151 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-14 22:02:53,250 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:53,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:53,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768987749] [2019-10-14 22:02:53,253 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:53,253 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:53,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:53,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:53,256 INFO L87 Difference]: Start difference. First operand 942 states and 1355 transitions. Second operand 5 states. [2019-10-14 22:02:54,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:54,442 INFO L93 Difference]: Finished difference Result 2282 states and 3428 transitions. [2019-10-14 22:02:54,446 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:54,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 288 [2019-10-14 22:02:54,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:54,455 INFO L225 Difference]: With dead ends: 2282 [2019-10-14 22:02:54,456 INFO L226 Difference]: Without dead ends: 1346 [2019-10-14 22:02:54,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:54,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1346 states. [2019-10-14 22:02:54,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1346 to 1322. [2019-10-14 22:02:54,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2019-10-14 22:02:54,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1815 transitions. [2019-10-14 22:02:54,506 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1815 transitions. Word has length 288 [2019-10-14 22:02:54,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:54,506 INFO L462 AbstractCegarLoop]: Abstraction has 1322 states and 1815 transitions. [2019-10-14 22:02:54,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:54,507 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1815 transitions. [2019-10-14 22:02:54,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-10-14 22:02:54,520 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:54,521 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:54,727 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:54,728 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:54,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:54,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1188860996, now seen corresponding path program 1 times [2019-10-14 22:02:54,729 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:54,729 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625816375] [2019-10-14 22:02:54,729 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:54,730 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:54,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,894 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 49 proven. 237 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:55,894 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625816375] [2019-10-14 22:02:55,895 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296561317] [2019-10-14 22:02:55,895 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 22:02:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,993 INFO L256 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:55,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:56,061 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:56,242 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 226 proven. 53 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 22:02:56,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:56,243 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:56,243 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116784920] [2019-10-14 22:02:56,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:56,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:56,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:56,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:56,245 INFO L87 Difference]: Start difference. First operand 1322 states and 1815 transitions. Second operand 16 states. [2019-10-14 22:02:58,333 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2019-10-14 22:03:01,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:01,181 INFO L93 Difference]: Finished difference Result 2951 states and 4024 transitions. [2019-10-14 22:03:01,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 22:03:01,181 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 302 [2019-10-14 22:03:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:01,188 INFO L225 Difference]: With dead ends: 2951 [2019-10-14 22:03:01,188 INFO L226 Difference]: Without dead ends: 1588 [2019-10-14 22:03:01,192 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 323 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 22:03:01,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2019-10-14 22:03:01,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1510. [2019-10-14 22:03:01,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1510 states. [2019-10-14 22:03:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 1843 transitions. [2019-10-14 22:03:01,235 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 1843 transitions. Word has length 302 [2019-10-14 22:03:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:01,236 INFO L462 AbstractCegarLoop]: Abstraction has 1510 states and 1843 transitions. [2019-10-14 22:03:01,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:03:01,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 1843 transitions. [2019-10-14 22:03:01,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2019-10-14 22:03:01,241 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:01,242 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:01,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:01,446 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:01,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:01,447 INFO L82 PathProgramCache]: Analyzing trace with hash 926488527, now seen corresponding path program 1 times [2019-10-14 22:03:01,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:01,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114677293] [2019-10-14 22:03:01,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:01,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:01,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,382 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 207 proven. 8 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:03:02,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114677293] [2019-10-14 22:03:02,383 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703498655] [2019-10-14 22:03:02,383 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 22:03:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:03:02,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:02,517 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 206 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2019-10-14 22:03:02,612 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:02,613 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [14] total 17 [2019-10-14 22:03:02,613 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098457339] [2019-10-14 22:03:02,614 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:02,614 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:02,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:02,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:03:02,615 INFO L87 Difference]: Start difference. First operand 1510 states and 1843 transitions. Second operand 5 states. [2019-10-14 22:03:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:03,710 INFO L93 Difference]: Finished difference Result 4160 states and 5151 transitions. [2019-10-14 22:03:03,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:03:03,713 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2019-10-14 22:03:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:03,725 INFO L225 Difference]: With dead ends: 4160 [2019-10-14 22:03:03,725 INFO L226 Difference]: Without dead ends: 2656 [2019-10-14 22:03:03,730 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 330 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:03:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-14 22:03:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2646. [2019-10-14 22:03:03,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2646 states. [2019-10-14 22:03:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2646 states to 2646 states and 3209 transitions. [2019-10-14 22:03:03,806 INFO L78 Accepts]: Start accepts. Automaton has 2646 states and 3209 transitions. Word has length 327 [2019-10-14 22:03:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:03,807 INFO L462 AbstractCegarLoop]: Abstraction has 2646 states and 3209 transitions. [2019-10-14 22:03:03,807 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 2646 states and 3209 transitions. [2019-10-14 22:03:03,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2019-10-14 22:03:03,817 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:03,817 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:04,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:04,023 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:04,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:04,024 INFO L82 PathProgramCache]: Analyzing trace with hash 940260124, now seen corresponding path program 1 times [2019-10-14 22:03:04,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:04,025 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873441949] [2019-10-14 22:03:04,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:04,025 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:04,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:04,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 311 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2019-10-14 22:03:04,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873441949] [2019-10-14 22:03:04,770 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053778171] [2019-10-14 22:03:04,770 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 22:03:04,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,903 INFO L256 TraceCheckSpWp]: Trace formula consists of 694 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:04,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:04,933 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:03:05,015 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 314 proven. 2 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:03:05,015 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:05,015 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:03:05,016 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325124607] [2019-10-14 22:03:05,016 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:03:05,016 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:05,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:03:05,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:05,017 INFO L87 Difference]: Start difference. First operand 2646 states and 3209 transitions. Second operand 11 states. [2019-10-14 22:03:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:07,575 INFO L93 Difference]: Finished difference Result 6408 states and 8042 transitions. [2019-10-14 22:03:07,575 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 22:03:07,575 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 437 [2019-10-14 22:03:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:07,592 INFO L225 Difference]: With dead ends: 6408 [2019-10-14 22:03:07,593 INFO L226 Difference]: Without dead ends: 3950 [2019-10-14 22:03:07,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 454 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:03:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2019-10-14 22:03:07,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3946. [2019-10-14 22:03:07,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3946 states. [2019-10-14 22:03:07,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 4874 transitions. [2019-10-14 22:03:07,696 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 4874 transitions. Word has length 437 [2019-10-14 22:03:07,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:07,697 INFO L462 AbstractCegarLoop]: Abstraction has 3946 states and 4874 transitions. [2019-10-14 22:03:07,697 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:03:07,698 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 4874 transitions. [2019-10-14 22:03:07,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2019-10-14 22:03:07,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:07,705 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-10-14 22:03:07,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:07,910 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:07,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:07,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1434354200, now seen corresponding path program 1 times [2019-10-14 22:03:07,911 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:07,911 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984243426] [2019-10-14 22:03:07,911 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,912 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:07,912 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:08,873 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 164 proven. 310 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-14 22:03:08,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984243426] [2019-10-14 22:03:08,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602276859] [2019-10-14 22:03:08,874 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 22:03:09,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:09,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:09,010 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 516 proven. 2 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2019-10-14 22:03:09,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:09,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 22:03:09,260 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662295048] [2019-10-14 22:03:09,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:03:09,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:03:09,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:09,268 INFO L87 Difference]: Start difference. First operand 3946 states and 4874 transitions. Second operand 13 states. [2019-10-14 22:03:13,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:13,745 INFO L93 Difference]: Finished difference Result 9204 states and 11444 transitions. [2019-10-14 22:03:13,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 22:03:13,746 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 455 [2019-10-14 22:03:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:13,766 INFO L225 Difference]: With dead ends: 9204 [2019-10-14 22:03:13,766 INFO L226 Difference]: Without dead ends: 5448 [2019-10-14 22:03:13,774 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 484 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 22:03:13,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2019-10-14 22:03:13,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 5056. [2019-10-14 22:03:13,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5056 states. [2019-10-14 22:03:13,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5056 states to 5056 states and 6009 transitions. [2019-10-14 22:03:13,888 INFO L78 Accepts]: Start accepts. Automaton has 5056 states and 6009 transitions. Word has length 455 [2019-10-14 22:03:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:13,888 INFO L462 AbstractCegarLoop]: Abstraction has 5056 states and 6009 transitions. [2019-10-14 22:03:13,888 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:03:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 5056 states and 6009 transitions. [2019-10-14 22:03:13,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2019-10-14 22:03:13,897 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:13,897 INFO L380 BasicCegarLoop]: trace histogram [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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-10-14 22:03:14,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:14,110 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:14,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1368279615, now seen corresponding path program 1 times [2019-10-14 22:03:14,111 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:14,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288956012] [2019-10-14 22:03:14,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:14,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:14,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat