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/Problem10_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:58:54,221 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:58:54,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:58:54,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:58:54,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:58:54,236 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:58:54,237 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:58:54,239 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:58:54,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:58:54,244 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:58:54,245 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:58:54,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:58:54,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:58:54,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:58:54,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:58:54,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:58:54,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:58:54,251 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:58:54,253 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:58:54,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:58:54,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:58:54,257 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:58:54,258 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:58:54,259 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:58:54,261 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:58:54,264 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:58:54,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:58:54,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:58:54,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:58:54,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:58:54,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:58:54,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:58:54,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:58:54,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:58:54,274 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:58:54,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:58:54,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:58:54,301 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:58:54,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:58:54,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:58:54,303 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:58:54,303 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:58:54,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:58:54,303 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:58:54,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:58:54,304 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:58:54,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:58:54,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:58:54,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:58:54,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:58:54,306 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:58:54,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:58:54,306 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:58:54,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:58:54,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:58:54,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:58:54,307 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:58:54,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:58:54,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:58:54,308 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:58:54,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:58:54,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:58:54,308 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:58:54,308 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:58:54,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:58:54,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:58:54,576 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:58:54,596 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:58:54,599 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:58:54,600 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:58:54,600 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:58:54,601 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-13 17:58:54,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053d804c9/6c37f919f6ac4a35ae24002c4a27cb6b/FLAG7a9143649 [2019-10-13 17:58:55,185 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:58:55,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label48.c [2019-10-13 17:58:55,196 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053d804c9/6c37f919f6ac4a35ae24002c4a27cb6b/FLAG7a9143649 [2019-10-13 17:58:55,477 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/053d804c9/6c37f919f6ac4a35ae24002c4a27cb6b [2019-10-13 17:58:55,487 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:58:55,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:58:55,489 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:58:55,489 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:58:55,493 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:58:55,494 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:58:55" (1/1) ... [2019-10-13 17:58:55,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b536ee0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:55, skipping insertion in model container [2019-10-13 17:58:55,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:58:55" (1/1) ... [2019-10-13 17:58:55,507 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:58:55,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:58:56,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:56,122 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:58:56,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:56,259 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:58:56,259 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56 WrapperNode [2019-10-13 17:58:56,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:58:56,260 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:58:56,260 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:58:56,260 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:58:56,272 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,289 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,324 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,340 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,347 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... [2019-10-13 17:58:56,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:58:56,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:58:56,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:58:56,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:58:56,355 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:58:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:58:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:58:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:58:56,413 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:58:56,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:58:56,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:58:57,589 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:58:57,589 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:58:57,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:57 BoogieIcfgContainer [2019-10-13 17:58:57,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:58:57,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:58:57,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:58:57,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:58:57,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:58:55" (1/3) ... [2019-10-13 17:58:57,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:57, skipping insertion in model container [2019-10-13 17:58:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:56" (2/3) ... [2019-10-13 17:58:57,597 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743f412d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:57, skipping insertion in model container [2019-10-13 17:58:57,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:57" (3/3) ... [2019-10-13 17:58:57,599 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label48.c [2019-10-13 17:58:57,611 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:58:57,620 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:58:57,634 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:58:57,668 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:58:57,668 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:58:57,668 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:58:57,669 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:58:57,669 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:58:57,669 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:58:57,669 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:58:57,669 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:58:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:58:57,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 17:58:57,705 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:57,706 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:57,708 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:57,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:57,714 INFO L82 PathProgramCache]: Analyzing trace with hash 54045006, now seen corresponding path program 1 times [2019-10-13 17:58:57,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:57,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-13 17:58:57,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:57,722 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:57,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:57,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:57,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:57,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:57,984 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637226830] [2019-10-13 17:58:57,985 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:57,986 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:58:57,986 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721296413] [2019-10-13 17:58:57,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:57,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:58,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:58,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:58:58,007 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:58:59,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:59,913 INFO L93 Difference]: Finished difference Result 730 states and 1301 transitions. [2019-10-13 17:58:59,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:59,915 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-10-13 17:58:59,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:59,932 INFO L225 Difference]: With dead ends: 730 [2019-10-13 17:58:59,933 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:58:59,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:59,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:59:00,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 441. [2019-10-13 17:59:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2019-10-13 17:59:00,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 672 transitions. [2019-10-13 17:59:00,025 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 672 transitions. Word has length 13 [2019-10-13 17:59:00,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:00,025 INFO L462 AbstractCegarLoop]: Abstraction has 441 states and 672 transitions. [2019-10-13 17:59:00,026 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:59:00,026 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 672 transitions. [2019-10-13 17:59:00,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2019-10-13 17:59:00,030 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:00,030 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:59:00,030 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:00,031 INFO L82 PathProgramCache]: Analyzing trace with hash 58156773, now seen corresponding path program 1 times [2019-10-13 17:59:00,031 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:00,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234929063] [2019-10-13 17:59:00,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:00,032 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:00,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:00,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:00,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:00,458 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234929063] [2019-10-13 17:59:00,458 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:00,458 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:00,459 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701398088] [2019-10-13 17:59:00,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:00,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:00,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:00,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:00,465 INFO L87 Difference]: Start difference. First operand 441 states and 672 transitions. Second operand 9 states. [2019-10-13 17:59:02,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:02,005 INFO L93 Difference]: Finished difference Result 1041 states and 1612 transitions. [2019-10-13 17:59:02,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:59:02,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2019-10-13 17:59:02,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:02,011 INFO L225 Difference]: With dead ends: 1041 [2019-10-13 17:59:02,011 INFO L226 Difference]: Without dead ends: 606 [2019-10-13 17:59:02,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:59:02,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2019-10-13 17:59:02,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 592. [2019-10-13 17:59:02,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 592 states. [2019-10-13 17:59:02,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 829 transitions. [2019-10-13 17:59:02,051 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 829 transitions. Word has length 86 [2019-10-13 17:59:02,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:02,052 INFO L462 AbstractCegarLoop]: Abstraction has 592 states and 829 transitions. [2019-10-13 17:59:02,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:02,052 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 829 transitions. [2019-10-13 17:59:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-13 17:59:02,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:02,056 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:02,057 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:02,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:02,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1907689263, now seen corresponding path program 1 times [2019-10-13 17:59:02,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:02,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911791198] [2019-10-13 17:59:02,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:02,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:02,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:02,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:02,279 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:02,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911791198] [2019-10-13 17:59:02,279 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958920827] [2019-10-13 17:59:02,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:02,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:02,337 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:02,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:02,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:02,404 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:02,404 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:59:02,405 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322052700] [2019-10-13 17:59:02,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:02,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:02,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:02,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:02,418 INFO L87 Difference]: Start difference. First operand 592 states and 829 transitions. Second operand 3 states. [2019-10-13 17:59:03,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:03,015 INFO L93 Difference]: Finished difference Result 1615 states and 2274 transitions. [2019-10-13 17:59:03,015 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:03,015 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 92 [2019-10-13 17:59:03,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:03,021 INFO L225 Difference]: With dead ends: 1615 [2019-10-13 17:59:03,022 INFO L226 Difference]: Without dead ends: 1029 [2019-10-13 17:59:03,023 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:03,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-10-13 17:59:03,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 886. [2019-10-13 17:59:03,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 886 states. [2019-10-13 17:59:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 1150 transitions. [2019-10-13 17:59:03,059 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 1150 transitions. Word has length 92 [2019-10-13 17:59:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:03,060 INFO L462 AbstractCegarLoop]: Abstraction has 886 states and 1150 transitions. [2019-10-13 17:59:03,060 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 1150 transitions. [2019-10-13 17:59:03,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 17:59:03,068 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:03,068 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:03,272 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:03,273 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:03,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1911741586, now seen corresponding path program 1 times [2019-10-13 17:59:03,274 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:03,275 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064052539] [2019-10-13 17:59:03,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:03,275 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:03,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:03,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:03,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:03,586 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064052539] [2019-10-13 17:59:03,586 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:59:03,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:59:03,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600858165] [2019-10-13 17:59:03,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:59:03,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:03,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:59:03,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:59:03,588 INFO L87 Difference]: Start difference. First operand 886 states and 1150 transitions. Second operand 9 states. [2019-10-13 17:59:05,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:05,369 INFO L93 Difference]: Finished difference Result 2245 states and 2959 transitions. [2019-10-13 17:59:05,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:59:05,371 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 149 [2019-10-13 17:59:05,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:05,378 INFO L225 Difference]: With dead ends: 2245 [2019-10-13 17:59:05,378 INFO L226 Difference]: Without dead ends: 1365 [2019-10-13 17:59:05,381 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2019-10-13 17:59:05,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1057. [2019-10-13 17:59:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1057 states. [2019-10-13 17:59:05,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1317 transitions. [2019-10-13 17:59:05,421 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1317 transitions. Word has length 149 [2019-10-13 17:59:05,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:05,422 INFO L462 AbstractCegarLoop]: Abstraction has 1057 states and 1317 transitions. [2019-10-13 17:59:05,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:59:05,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1317 transitions. [2019-10-13 17:59:05,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 17:59:05,425 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:05,425 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:05,426 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:05,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:05,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1989322578, now seen corresponding path program 1 times [2019-10-13 17:59:05,426 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:05,427 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794341815] [2019-10-13 17:59:05,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:05,427 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:05,427 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:05,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:05,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 79 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:05,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794341815] [2019-10-13 17:59:05,679 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043822441] [2019-10-13 17:59:05,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:05,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:05,773 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:05,880 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:05,880 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:59:05,881 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764646760] [2019-10-13 17:59:05,882 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:59:05,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:05,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:59:05,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:59:05,883 INFO L87 Difference]: Start difference. First operand 1057 states and 1317 transitions. Second operand 11 states. [2019-10-13 17:59:08,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:08,789 INFO L93 Difference]: Finished difference Result 2933 states and 4043 transitions. [2019-10-13 17:59:08,789 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:59:08,790 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 173 [2019-10-13 17:59:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:08,803 INFO L225 Difference]: With dead ends: 2933 [2019-10-13 17:59:08,803 INFO L226 Difference]: Without dead ends: 1882 [2019-10-13 17:59:08,807 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:59:08,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2019-10-13 17:59:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1548. [2019-10-13 17:59:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1548 states. [2019-10-13 17:59:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1548 states to 1548 states and 1966 transitions. [2019-10-13 17:59:08,906 INFO L78 Accepts]: Start accepts. Automaton has 1548 states and 1966 transitions. Word has length 173 [2019-10-13 17:59:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:08,907 INFO L462 AbstractCegarLoop]: Abstraction has 1548 states and 1966 transitions. [2019-10-13 17:59:08,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:59:08,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1548 states and 1966 transitions. [2019-10-13 17:59:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 17:59:08,912 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:08,913 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:09,124 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:09,125 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -885143483, now seen corresponding path program 1 times [2019-10-13 17:59:09,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:09,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140300799] [2019-10-13 17:59:09,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:09,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:09,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:09,320 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2019-10-13 17:59:09,321 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140300799] [2019-10-13 17:59:09,322 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238151393] [2019-10-13 17:59:09,323 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:09,409 INFO L256 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:09,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:09,474 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-13 17:59:09,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:09,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:59:09,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839216738] [2019-10-13 17:59:09,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:09,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:09,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:09,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:09,477 INFO L87 Difference]: Start difference. First operand 1548 states and 1966 transitions. Second operand 3 states. [2019-10-13 17:59:10,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:10,165 INFO L93 Difference]: Finished difference Result 4274 states and 5547 transitions. [2019-10-13 17:59:10,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:10,173 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 190 [2019-10-13 17:59:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:10,187 INFO L225 Difference]: With dead ends: 4274 [2019-10-13 17:59:10,188 INFO L226 Difference]: Without dead ends: 2732 [2019-10-13 17:59:10,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 197 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:10,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2732 states. [2019-10-13 17:59:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2732 to 2585. [2019-10-13 17:59:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2585 states. [2019-10-13 17:59:10,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2585 states to 2585 states and 3228 transitions. [2019-10-13 17:59:10,294 INFO L78 Accepts]: Start accepts. Automaton has 2585 states and 3228 transitions. Word has length 190 [2019-10-13 17:59:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:10,295 INFO L462 AbstractCegarLoop]: Abstraction has 2585 states and 3228 transitions. [2019-10-13 17:59:10,295 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2585 states and 3228 transitions. [2019-10-13 17:59:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2019-10-13 17:59:10,301 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:10,301 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:59:10,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:10,505 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1354539530, now seen corresponding path program 1 times [2019-10-13 17:59:10,506 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:10,507 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585487331] [2019-10-13 17:59:10,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:10,507 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:10,508 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:10,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:10,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 85 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:59:10,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585487331] [2019-10-13 17:59:10,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375863894] [2019-10-13 17:59:10,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:10,957 INFO L256 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:10,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:11,135 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 89 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:59:11,137 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:11,137 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-13 17:59:11,137 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112571504] [2019-10-13 17:59:11,138 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:59:11,139 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:11,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:59:11,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:59:11,140 INFO L87 Difference]: Start difference. First operand 2585 states and 3228 transitions. Second operand 13 states. [2019-10-13 17:59:14,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:14,627 INFO L93 Difference]: Finished difference Result 7087 states and 8798 transitions. [2019-10-13 17:59:14,633 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:59:14,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 233 [2019-10-13 17:59:14,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:14,649 INFO L225 Difference]: With dead ends: 7087 [2019-10-13 17:59:14,649 INFO L226 Difference]: Without dead ends: 2867 [2019-10-13 17:59:14,663 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=524, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:59:14,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2019-10-13 17:59:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2275. [2019-10-13 17:59:14,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2019-10-13 17:59:14,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 2611 transitions. [2019-10-13 17:59:14,729 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 2611 transitions. Word has length 233 [2019-10-13 17:59:14,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:14,729 INFO L462 AbstractCegarLoop]: Abstraction has 2275 states and 2611 transitions. [2019-10-13 17:59:14,729 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:59:14,730 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 2611 transitions. [2019-10-13 17:59:14,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2019-10-13 17:59:14,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:14,737 INFO L380 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:59:14,941 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:14,942 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash 997665666, now seen corresponding path program 1 times [2019-10-13 17:59:14,942 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:14,943 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744815721] [2019-10-13 17:59:14,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:14,943 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:14,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:14,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:15,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:59:15,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744815721] [2019-10-13 17:59:15,213 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455996533] [2019-10-13 17:59:15,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:15,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:15,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:59:15,338 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:15,428 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2019-10-13 17:59:15,431 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:59:15,432 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:59:15,433 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902106432] [2019-10-13 17:59:15,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:59:15,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:59:15,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:15,439 INFO L87 Difference]: Start difference. First operand 2275 states and 2611 transitions. Second operand 3 states. [2019-10-13 17:59:16,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:16,060 INFO L93 Difference]: Finished difference Result 4838 states and 5609 transitions. [2019-10-13 17:59:16,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:59:16,060 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 269 [2019-10-13 17:59:16,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:16,071 INFO L225 Difference]: With dead ends: 4838 [2019-10-13 17:59:16,071 INFO L226 Difference]: Without dead ends: 2565 [2019-10-13 17:59:16,078 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:59:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2565 states. [2019-10-13 17:59:16,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2565 to 2565. [2019-10-13 17:59:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2565 states. [2019-10-13 17:59:16,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2565 states to 2565 states and 2941 transitions. [2019-10-13 17:59:16,210 INFO L78 Accepts]: Start accepts. Automaton has 2565 states and 2941 transitions. Word has length 269 [2019-10-13 17:59:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:16,210 INFO L462 AbstractCegarLoop]: Abstraction has 2565 states and 2941 transitions. [2019-10-13 17:59:16,211 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:59:16,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2565 states and 2941 transitions. [2019-10-13 17:59:16,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 17:59:16,219 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:16,220 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 17:59:16,431 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:16,432 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:16,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:16,432 INFO L82 PathProgramCache]: Analyzing trace with hash -126778982, now seen corresponding path program 1 times [2019-10-13 17:59:16,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:16,433 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598111320] [2019-10-13 17:59:16,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:16,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:16,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 87 proven. 139 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:59:16,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598111320] [2019-10-13 17:59:16,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874544212] [2019-10-13 17:59:16,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:17,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:59:17,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:17,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:17,285 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2019-10-13 17:59:17,286 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:17,286 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 17 [2019-10-13 17:59:17,286 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024341842] [2019-10-13 17:59:17,287 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 17:59:17,287 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:17,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 17:59:17,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:59:17,288 INFO L87 Difference]: Start difference. First operand 2565 states and 2941 transitions. Second operand 17 states. [2019-10-13 17:59:24,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:59:24,078 INFO L93 Difference]: Finished difference Result 6285 states and 7591 transitions. [2019-10-13 17:59:24,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 17:59:24,078 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 273 [2019-10-13 17:59:24,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:59:24,097 INFO L225 Difference]: With dead ends: 6285 [2019-10-13 17:59:24,097 INFO L226 Difference]: Without dead ends: 3869 [2019-10-13 17:59:24,106 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 297 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 622 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=443, Invalid=2107, Unknown=0, NotChecked=0, Total=2550 [2019-10-13 17:59:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3869 states. [2019-10-13 17:59:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3869 to 3755. [2019-10-13 17:59:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3755 states. [2019-10-13 17:59:24,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 4309 transitions. [2019-10-13 17:59:24,226 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 4309 transitions. Word has length 273 [2019-10-13 17:59:24,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:59:24,227 INFO L462 AbstractCegarLoop]: Abstraction has 3755 states and 4309 transitions. [2019-10-13 17:59:24,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 17:59:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 4309 transitions. [2019-10-13 17:59:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-10-13 17:59:24,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:59:24,237 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-13 17:59:24,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:24,442 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:59:24,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:59:24,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1681862689, now seen corresponding path program 1 times [2019-10-13 17:59:24,443 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:59:24,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010854684] [2019-10-13 17:59:24,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,444 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:59:24,444 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:59:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:24,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 234 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 17:59:25,029 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010854684] [2019-10-13 17:59:25,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422803529] [2019-10-13 17:59:25,030 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:59:25,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:59:25,122 INFO L256 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:59:25,125 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:59:25,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,132 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,133 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,134 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,135 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,137 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,138 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:59:25,330 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 17:59:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2019-10-13 17:59:25,424 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:59:25,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 5] total 19 [2019-10-13 17:59:25,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891602303] [2019-10-13 17:59:25,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:59:25,426 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:59:25,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:59:25,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:59:25,426 INFO L87 Difference]: Start difference. First operand 3755 states and 4309 transitions. Second operand 19 states.