java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem01_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:51:32,955 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:51:32,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:51:32,970 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:51:32,970 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:51:32,971 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:51:32,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:51:32,975 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:51:32,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:51:32,977 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:51:32,978 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:51:32,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:51:32,980 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:51:32,981 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:51:32,982 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:51:32,983 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:51:32,984 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:51:32,985 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:51:32,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:51:32,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:51:32,990 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:51:32,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:51:32,993 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:51:32,993 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:51:32,996 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:51:32,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:51:33,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:51:33,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:51:33,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:51:33,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:51:33,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:51:33,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:51:33,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:51:33,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:51:33,005 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:51:33,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:51:33,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:51:33,020 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:51:33,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:51:33,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:51:33,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:51:33,022 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:51:33,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:51:33,023 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:51:33,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:51:33,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:51:33,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:51:33,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:51:33,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:51:33,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:51:33,024 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:51:33,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:51:33,025 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:51:33,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:51:33,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:51:33,025 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:51:33,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:51:33,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:51:33,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:33,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:51:33,026 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:51:33,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:51:33,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:51:33,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:51:33,027 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:51:33,027 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:51:33,339 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:51:33,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:51:33,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:51:33,365 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:51:33,365 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:51:33,366 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label15.c [2019-10-14 21:51:33,437 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d367cad26/e9e6724fa3c44e42917ee07a6d5d9317/FLAGc3227a8ac [2019-10-14 21:51:34,018 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:51:34,023 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label15.c [2019-10-14 21:51:34,043 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d367cad26/e9e6724fa3c44e42917ee07a6d5d9317/FLAGc3227a8ac [2019-10-14 21:51:34,289 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d367cad26/e9e6724fa3c44e42917ee07a6d5d9317 [2019-10-14 21:51:34,299 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:51:34,301 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:51:34,302 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:34,302 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:51:34,308 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:51:34,309 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:34" (1/1) ... [2019-10-14 21:51:34,314 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6836b2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:34, skipping insertion in model container [2019-10-14 21:51:34,314 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:51:34" (1/1) ... [2019-10-14 21:51:34,325 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:51:34,378 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:51:34,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:34,905 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:51:35,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:51:35,057 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:51:35,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35 WrapperNode [2019-10-14 21:51:35,058 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:51:35,059 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:51:35,059 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:51:35,059 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:51:35,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,090 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,131 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,174 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... [2019-10-14 21:51:35,184 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:51:35,184 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:51:35,185 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:51:35,185 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:51:35,186 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:51:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:51:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:51:35,257 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:51:35,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:51:35,258 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:51:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:51:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:51:35,259 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:51:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:51:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:51:35,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:51:36,414 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:51:36,414 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:51:36,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:36 BoogieIcfgContainer [2019-10-14 21:51:36,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:51:36,420 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:51:36,420 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:51:36,424 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:51:36,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:51:34" (1/3) ... [2019-10-14 21:51:36,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed6d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:36, skipping insertion in model container [2019-10-14 21:51:36,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:51:35" (2/3) ... [2019-10-14 21:51:36,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ed6d654 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:51:36, skipping insertion in model container [2019-10-14 21:51:36,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:51:36" (3/3) ... [2019-10-14 21:51:36,438 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label15.c [2019-10-14 21:51:36,450 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:51:36,460 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:51:36,475 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:51:36,513 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:51:36,514 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:51:36,515 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:51:36,515 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:51:36,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:51:36,516 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:51:36,516 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:51:36,516 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:51:36,555 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-10-14 21:51:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:51:36,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:36,571 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:36,573 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:36,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash 78510191, now seen corresponding path program 1 times [2019-10-14 21:51:36,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:36,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454618865] [2019-10-14 21:51:36,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:36,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:36,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:37,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:37,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:37,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454618865] [2019-10-14 21:51:37,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:37,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:51:37,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070733290] [2019-10-14 21:51:37,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:51:37,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:37,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:51:37,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:51:37,190 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 5 states. [2019-10-14 21:51:38,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:38,856 INFO L93 Difference]: Finished difference Result 557 states and 956 transitions. [2019-10-14 21:51:38,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:51:38,861 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 87 [2019-10-14 21:51:38,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:38,889 INFO L225 Difference]: With dead ends: 557 [2019-10-14 21:51:38,889 INFO L226 Difference]: Without dead ends: 286 [2019-10-14 21:51:38,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:51:38,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2019-10-14 21:51:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 280. [2019-10-14 21:51:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2019-10-14 21:51:38,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 414 transitions. [2019-10-14 21:51:38,990 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 414 transitions. Word has length 87 [2019-10-14 21:51:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:38,991 INFO L462 AbstractCegarLoop]: Abstraction has 280 states and 414 transitions. [2019-10-14 21:51:38,991 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:51:38,991 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 414 transitions. [2019-10-14 21:51:38,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-10-14 21:51:38,996 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:38,997 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:38,997 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:38,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:38,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1666970376, now seen corresponding path program 1 times [2019-10-14 21:51:38,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:38,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102560586] [2019-10-14 21:51:38,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:38,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:38,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:39,226 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:39,227 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102560586] [2019-10-14 21:51:39,228 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:39,228 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:51:39,229 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730750074] [2019-10-14 21:51:39,235 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:51:39,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:39,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:51:39,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:39,237 INFO L87 Difference]: Start difference. First operand 280 states and 414 transitions. Second operand 9 states. [2019-10-14 21:51:40,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:40,775 INFO L93 Difference]: Finished difference Result 713 states and 1086 transitions. [2019-10-14 21:51:40,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:51:40,775 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2019-10-14 21:51:40,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:40,780 INFO L225 Difference]: With dead ends: 713 [2019-10-14 21:51:40,780 INFO L226 Difference]: Without dead ends: 439 [2019-10-14 21:51:40,782 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:51:40,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2019-10-14 21:51:40,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2019-10-14 21:51:40,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-10-14 21:51:40,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 611 transitions. [2019-10-14 21:51:40,833 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 611 transitions. Word has length 97 [2019-10-14 21:51:40,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:40,834 INFO L462 AbstractCegarLoop]: Abstraction has 419 states and 611 transitions. [2019-10-14 21:51:40,834 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:51:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 611 transitions. [2019-10-14 21:51:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-14 21:51:40,840 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:40,840 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:40,840 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:40,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:40,841 INFO L82 PathProgramCache]: Analyzing trace with hash -758839946, now seen corresponding path program 1 times [2019-10-14 21:51:40,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:40,841 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253062573] [2019-10-14 21:51:40,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:40,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:40,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:41,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:41,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:41,100 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:41,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253062573] [2019-10-14 21:51:41,100 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565409303] [2019-10-14 21:51:41,101 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:41,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:41,187 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:51:41,198 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:41,263 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:41,263 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:51:41,263 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153331710] [2019-10-14 21:51:41,264 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:51:41,264 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:51:41,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:51:41,270 INFO L87 Difference]: Start difference. First operand 419 states and 611 transitions. Second operand 3 states. [2019-10-14 21:51:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:41,862 INFO L93 Difference]: Finished difference Result 1104 states and 1629 transitions. [2019-10-14 21:51:41,863 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:51:41,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2019-10-14 21:51:41,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:41,868 INFO L225 Difference]: With dead ends: 1104 [2019-10-14 21:51:41,869 INFO L226 Difference]: Without dead ends: 691 [2019-10-14 21:51:41,870 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 101 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:51:41,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2019-10-14 21:51:41,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 691. [2019-10-14 21:51:41,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 691 states. [2019-10-14 21:51:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 691 states to 691 states and 969 transitions. [2019-10-14 21:51:41,905 INFO L78 Accepts]: Start accepts. Automaton has 691 states and 969 transitions. Word has length 98 [2019-10-14 21:51:41,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:41,908 INFO L462 AbstractCegarLoop]: Abstraction has 691 states and 969 transitions. [2019-10-14 21:51:41,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:51:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 691 states and 969 transitions. [2019-10-14 21:51:41,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 21:51:41,915 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:41,915 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:42,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:42,128 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:42,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash 136784332, now seen corresponding path program 1 times [2019-10-14 21:51:42,129 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:42,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152429980] [2019-10-14 21:51:42,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:42,130 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:42,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:42,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:42,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:42,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152429980] [2019-10-14 21:51:42,342 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:42,343 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:51:42,343 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963097489] [2019-10-14 21:51:42,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:51:42,344 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:42,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:51:42,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:51:42,345 INFO L87 Difference]: Start difference. First operand 691 states and 969 transitions. Second operand 9 states. [2019-10-14 21:51:44,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:44,129 INFO L93 Difference]: Finished difference Result 2500 states and 3645 transitions. [2019-10-14 21:51:44,131 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:51:44,131 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-14 21:51:44,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:44,143 INFO L225 Difference]: With dead ends: 2500 [2019-10-14 21:51:44,143 INFO L226 Difference]: Without dead ends: 1815 [2019-10-14 21:51:44,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:51:44,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1815 states. [2019-10-14 21:51:44,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1815 to 1114. [2019-10-14 21:51:44,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1114 states. [2019-10-14 21:51:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1532 transitions. [2019-10-14 21:51:44,219 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1532 transitions. Word has length 107 [2019-10-14 21:51:44,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:44,220 INFO L462 AbstractCegarLoop]: Abstraction has 1114 states and 1532 transitions. [2019-10-14 21:51:44,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:51:44,220 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1532 transitions. [2019-10-14 21:51:44,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:51:44,226 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:44,226 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:44,227 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:44,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:44,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1710985768, now seen corresponding path program 1 times [2019-10-14 21:51:44,227 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:44,228 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038084742] [2019-10-14 21:51:44,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:44,228 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:44,228 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:44,490 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:44,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038084742] [2019-10-14 21:51:44,490 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:51:44,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 21:51:44,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456446925] [2019-10-14 21:51:44,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:51:44,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:51:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:51:44,493 INFO L87 Difference]: Start difference. First operand 1114 states and 1532 transitions. Second operand 10 states. [2019-10-14 21:51:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:46,588 INFO L93 Difference]: Finished difference Result 2518 states and 3499 transitions. [2019-10-14 21:51:46,588 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:51:46,588 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 121 [2019-10-14 21:51:46,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:46,603 INFO L225 Difference]: With dead ends: 2518 [2019-10-14 21:51:46,603 INFO L226 Difference]: Without dead ends: 1410 [2019-10-14 21:51:46,608 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:51:46,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2019-10-14 21:51:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1118. [2019-10-14 21:51:46,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-10-14 21:51:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1510 transitions. [2019-10-14 21:51:46,660 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1510 transitions. Word has length 121 [2019-10-14 21:51:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:46,660 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1510 transitions. [2019-10-14 21:51:46,660 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:51:46,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1510 transitions. [2019-10-14 21:51:46,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-14 21:51:46,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:46,666 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:46,667 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:46,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1073963665, now seen corresponding path program 1 times [2019-10-14 21:51:46,668 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:46,668 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304967100] [2019-10-14 21:51:46,668 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,669 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:46,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:46,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 47 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:46,903 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304967100] [2019-10-14 21:51:46,904 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669229547] [2019-10-14 21:51:46,904 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:46,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:51:47,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:47,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:47,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:47,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:51:47,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568162454] [2019-10-14 21:51:47,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:51:47,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:47,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:51:47,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:51:47,082 INFO L87 Difference]: Start difference. First operand 1118 states and 1510 transitions. Second operand 11 states. [2019-10-14 21:51:51,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:51,747 INFO L93 Difference]: Finished difference Result 4454 states and 6215 transitions. [2019-10-14 21:51:51,747 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:51:51,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 132 [2019-10-14 21:51:51,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:51,764 INFO L225 Difference]: With dead ends: 4454 [2019-10-14 21:51:51,764 INFO L226 Difference]: Without dead ends: 2921 [2019-10-14 21:51:51,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=226, Invalid=830, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:51:51,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2921 states. [2019-10-14 21:51:51,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2921 to 2502. [2019-10-14 21:51:51,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2502 states. [2019-10-14 21:51:51,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3067 transitions. [2019-10-14 21:51:51,868 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3067 transitions. Word has length 132 [2019-10-14 21:51:51,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:51,869 INFO L462 AbstractCegarLoop]: Abstraction has 2502 states and 3067 transitions. [2019-10-14 21:51:51,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:51:51,869 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3067 transitions. [2019-10-14 21:51:51,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-14 21:51:51,877 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:51,877 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:52,081 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:52,082 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1320381313, now seen corresponding path program 1 times [2019-10-14 21:51:52,083 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:52,084 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143884524] [2019-10-14 21:51:52,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:52,084 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:52,084 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 63 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:52,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143884524] [2019-10-14 21:51:52,655 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120798385] [2019-10-14 21:51:52,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:52,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 40 conjunts are in the unsatisfiable core [2019-10-14 21:51:52,775 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:52,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 21:51:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:51:53,001 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:51:53,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2019-10-14 21:51:53,001 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197842688] [2019-10-14 21:51:53,001 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:51:53,002 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:53,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:51:53,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:51:53,002 INFO L87 Difference]: Start difference. First operand 2502 states and 3067 transitions. Second operand 6 states. [2019-10-14 21:51:54,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:54,133 INFO L93 Difference]: Finished difference Result 5133 states and 6299 transitions. [2019-10-14 21:51:54,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:51:54,134 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 140 [2019-10-14 21:51:54,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:54,146 INFO L225 Difference]: With dead ends: 5133 [2019-10-14 21:51:54,146 INFO L226 Difference]: Without dead ends: 2641 [2019-10-14 21:51:54,153 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:51:54,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2641 states. [2019-10-14 21:51:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2641 to 2635. [2019-10-14 21:51:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2635 states. [2019-10-14 21:51:54,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3152 transitions. [2019-10-14 21:51:54,234 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3152 transitions. Word has length 140 [2019-10-14 21:51:54,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:54,235 INFO L462 AbstractCegarLoop]: Abstraction has 2635 states and 3152 transitions. [2019-10-14 21:51:54,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:51:54,236 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3152 transitions. [2019-10-14 21:51:54,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-14 21:51:54,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:54,242 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:54,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:54,446 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:54,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:54,447 INFO L82 PathProgramCache]: Analyzing trace with hash 119363290, now seen corresponding path program 1 times [2019-10-14 21:51:54,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:54,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077462896] [2019-10-14 21:51:54,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:54,448 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:54,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 61 proven. 18 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:51:54,672 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077462896] [2019-10-14 21:51:54,673 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914376339] [2019-10-14 21:51:54,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:54,765 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:51:54,771 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:54,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:51:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 53 proven. 2 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-10-14 21:51:54,913 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:54,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 21:51:54,913 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128315432] [2019-10-14 21:51:54,914 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:51:54,914 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:54,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:51:54,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:51:54,915 INFO L87 Difference]: Start difference. First operand 2635 states and 3152 transitions. Second operand 12 states. [2019-10-14 21:51:56,345 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-10-14 21:51:57,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:51:57,051 INFO L93 Difference]: Finished difference Result 5141 states and 6188 transitions. [2019-10-14 21:51:57,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 21:51:57,052 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 148 [2019-10-14 21:51:57,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:51:57,066 INFO L225 Difference]: With dead ends: 5141 [2019-10-14 21:51:57,067 INFO L226 Difference]: Without dead ends: 2647 [2019-10-14 21:51:57,076 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 162 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=135, Invalid=371, Unknown=0, NotChecked=0, Total=506 [2019-10-14 21:51:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2647 states. [2019-10-14 21:51:57,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2647 to 2641. [2019-10-14 21:51:57,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2641 states. [2019-10-14 21:51:57,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2641 states to 2641 states and 3133 transitions. [2019-10-14 21:51:57,205 INFO L78 Accepts]: Start accepts. Automaton has 2641 states and 3133 transitions. Word has length 148 [2019-10-14 21:51:57,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:51:57,205 INFO L462 AbstractCegarLoop]: Abstraction has 2641 states and 3133 transitions. [2019-10-14 21:51:57,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:51:57,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2641 states and 3133 transitions. [2019-10-14 21:51:57,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-10-14 21:51:57,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:51:57,213 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:51:57,416 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:57,417 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:51:57,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:51:57,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1861440533, now seen corresponding path program 1 times [2019-10-14 21:51:57,418 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:51:57,418 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521752482] [2019-10-14 21:51:57,418 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:57,419 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:51:57,419 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:51:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:57,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,179 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:51:58,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521752482] [2019-10-14 21:51:58,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361597591] [2019-10-14 21:51:58,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:51:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:51:58,284 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:51:58,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:51:58,382 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:51:58,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:51:58,383 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 21:51:58,383 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628536078] [2019-10-14 21:51:58,384 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:51:58,384 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:51:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:51:58,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:51:58,385 INFO L87 Difference]: Start difference. First operand 2641 states and 3133 transitions. Second operand 13 states. [2019-10-14 21:51:59,024 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 79 [2019-10-14 21:51:59,251 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 84 [2019-10-14 21:51:59,838 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 51 [2019-10-14 21:52:00,052 WARN L191 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 75 [2019-10-14 21:52:00,273 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2019-10-14 21:52:00,515 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 66 [2019-10-14 21:52:00,907 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2019-10-14 21:52:01,738 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2019-10-14 21:52:02,508 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 75 [2019-10-14 21:52:03,216 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2019-10-14 21:52:03,604 WARN L191 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2019-10-14 21:52:03,983 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 51 [2019-10-14 21:52:04,261 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2019-10-14 21:52:04,520 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 84 [2019-10-14 21:52:05,094 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 69 [2019-10-14 21:52:05,373 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2019-10-14 21:52:05,746 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2019-10-14 21:52:06,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:52:06,020 INFO L93 Difference]: Finished difference Result 8157 states and 9867 transitions. [2019-10-14 21:52:06,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 21:52:06,021 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 162 [2019-10-14 21:52:06,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:52:06,048 INFO L225 Difference]: With dead ends: 8157 [2019-10-14 21:52:06,048 INFO L226 Difference]: Without dead ends: 5657 [2019-10-14 21:52:06,056 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=487, Invalid=1963, Unknown=0, NotChecked=0, Total=2450 [2019-10-14 21:52:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5657 states. [2019-10-14 21:52:06,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5657 to 2935. [2019-10-14 21:52:06,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2935 states. [2019-10-14 21:52:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 3359 transitions. [2019-10-14 21:52:06,156 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 3359 transitions. Word has length 162 [2019-10-14 21:52:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:52:06,157 INFO L462 AbstractCegarLoop]: Abstraction has 2935 states and 3359 transitions. [2019-10-14 21:52:06,157 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:52:06,157 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 3359 transitions. [2019-10-14 21:52:06,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 21:52:06,165 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:52:06,165 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:52:06,369 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:06,369 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:52:06,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:52:06,370 INFO L82 PathProgramCache]: Analyzing trace with hash 2021476655, now seen corresponding path program 1 times [2019-10-14 21:52:06,370 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:52:06,370 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143911891] [2019-10-14 21:52:06,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:06,371 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:52:06,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:52:06,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 223 proven. 6 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:52:07,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143911891] [2019-10-14 21:52:07,293 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91015709] [2019-10-14 21:52:07,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:52:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:52:07,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:52:07,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:52:07,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:52:07,508 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-14 21:52:07,509 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:52:07,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 21:52:07,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288816189] [2019-10-14 21:52:07,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:52:07,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:52:07,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:52:07,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:52:07,511 INFO L87 Difference]: Start difference. First operand 2935 states and 3359 transitions. Second operand 17 states. [2019-10-14 21:52:07,794 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-10-14 21:52:08,221 WARN L191 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 78 [2019-10-14 21:52:08,474 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 79 [2019-10-14 21:52:08,832 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 52 [2019-10-14 21:52:09,499 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-10-14 21:52:09,657 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2019-10-14 21:52:09,837 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 71 [2019-10-14 21:52:10,526 WARN L191 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 79 [2019-10-14 21:52:10,788 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48