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/Problem16_label35.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:33,278 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:33,281 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:33,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:33,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:33,302 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:33,304 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:33,315 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:33,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:33,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:33,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:33,327 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:33,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:33,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:33,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:33,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:33,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:33,336 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:33,337 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:33,342 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:33,346 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:33,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:33,351 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:33,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:33,354 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:33,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:33,360 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:33,361 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:33,361 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:33,364 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:33,364 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:33,365 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:33,365 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:33,366 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:33,366 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:33,368 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:33,369 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:04:33,399 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:33,399 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:33,400 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:33,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:33,401 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:33,401 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:33,401 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:33,402 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:33,402 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:33,402 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:33,402 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:33,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:33,405 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:33,405 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:33,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:33,405 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:33,405 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:33,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:33,406 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:33,406 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:33,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:33,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:33,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:33,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:33,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:33,407 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:33,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:33,408 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:33,408 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:33,683 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:33,696 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:33,699 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:33,701 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:33,702 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:33,702 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-10-14 22:04:33,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ee979d6/a61655f93f2e41d6ae6f678bcb6bf240/FLAGda81fb582 [2019-10-14 22:04:34,447 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:34,448 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label35.c [2019-10-14 22:04:34,473 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ee979d6/a61655f93f2e41d6ae6f678bcb6bf240/FLAGda81fb582 [2019-10-14 22:04:34,589 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/24ee979d6/a61655f93f2e41d6ae6f678bcb6bf240 [2019-10-14 22:04:34,600 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:34,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:34,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:34,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:34,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:34,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:34" (1/1) ... [2019-10-14 22:04:34,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ad4c578 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:34, skipping insertion in model container [2019-10-14 22:04:34,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:34" (1/1) ... [2019-10-14 22:04:34,623 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:34,699 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:35,574 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:35,580 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:35,947 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:35,970 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:35,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35 WrapperNode [2019-10-14 22:04:35,971 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:35,972 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:35,972 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:35,972 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:35,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:35,988 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,114 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (1/1) ... [2019-10-14 22:04:36,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:36,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:36,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:36,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:36,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (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 22:04:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:36,238 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:38,707 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:38,707 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:38,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:38 BoogieIcfgContainer [2019-10-14 22:04:38,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:38,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:38,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:38,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:38,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:34" (1/3) ... [2019-10-14 22:04:38,715 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c85343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:38, skipping insertion in model container [2019-10-14 22:04:38,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:35" (2/3) ... [2019-10-14 22:04:38,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@64c85343 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:38, skipping insertion in model container [2019-10-14 22:04:38,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:38" (3/3) ... [2019-10-14 22:04:38,723 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label35.c [2019-10-14 22:04:38,734 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:38,746 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:38,758 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:38,800 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:38,801 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:38,801 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:38,801 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:38,802 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:38,802 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:38,802 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:38,802 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:38,830 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:38,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 22:04:38,839 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:38,840 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] [2019-10-14 22:04:38,842 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:38,848 INFO L82 PathProgramCache]: Analyzing trace with hash 338381554, now seen corresponding path program 1 times [2019-10-14 22:04:38,857 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:38,858 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138920731] [2019-10-14 22:04:38,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:38,858 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:38,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:39,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:39,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:39,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:39,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138920731] [2019-10-14 22:04:39,267 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:39,267 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:39,268 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294669908] [2019-10-14 22:04:39,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:39,273 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:39,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:39,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:39,289 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:44,227 INFO L93 Difference]: Finished difference Result 1530 states and 2865 transitions. [2019-10-14 22:04:44,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:44,228 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2019-10-14 22:04:44,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:44,254 INFO L225 Difference]: With dead ends: 1530 [2019-10-14 22:04:44,255 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:44,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:44,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:44,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:44,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1787 transitions. [2019-10-14 22:04:44,396 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1787 transitions. Word has length 47 [2019-10-14 22:04:44,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:44,397 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1787 transitions. [2019-10-14 22:04:44,397 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:44,398 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1787 transitions. [2019-10-14 22:04:44,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 22:04:44,403 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:44,404 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:44,404 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:44,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:44,404 INFO L82 PathProgramCache]: Analyzing trace with hash -8457825, now seen corresponding path program 1 times [2019-10-14 22:04:44,405 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:44,405 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112262558] [2019-10-14 22:04:44,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,405 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:44,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:44,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:44,682 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112262558] [2019-10-14 22:04:44,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:44,683 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:04:44,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897231765] [2019-10-14 22:04:44,685 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:04:44,686 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:44,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:04:44,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:04:44,686 INFO L87 Difference]: Start difference. First operand 1031 states and 1787 transitions. Second operand 8 states. [2019-10-14 22:04:49,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:49,733 INFO L93 Difference]: Finished difference Result 3125 states and 5529 transitions. [2019-10-14 22:04:49,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:49,734 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2019-10-14 22:04:49,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:49,751 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:04:49,752 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:04:49,756 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:04:49,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:04:49,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 1384. [2019-10-14 22:04:49,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1384 states. [2019-10-14 22:04:49,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2288 transitions. [2019-10-14 22:04:49,841 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2288 transitions. Word has length 116 [2019-10-14 22:04:49,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:49,842 INFO L462 AbstractCegarLoop]: Abstraction has 1384 states and 2288 transitions. [2019-10-14 22:04:49,842 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:04:49,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2288 transitions. [2019-10-14 22:04:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 22:04:49,845 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:49,845 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:49,846 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:49,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1750756938, now seen corresponding path program 1 times [2019-10-14 22:04:49,847 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:49,847 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438411499] [2019-10-14 22:04:49,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,847 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,848 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:49,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:50,165 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438411499] [2019-10-14 22:04:50,165 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:50,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:50,166 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507527420] [2019-10-14 22:04:50,168 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:50,169 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:50,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:50,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:50,174 INFO L87 Difference]: Start difference. First operand 1384 states and 2288 transitions. Second operand 9 states. [2019-10-14 22:04:55,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:55,336 INFO L93 Difference]: Finished difference Result 4170 states and 6860 transitions. [2019-10-14 22:04:55,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:04:55,337 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 119 [2019-10-14 22:04:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:55,355 INFO L225 Difference]: With dead ends: 4170 [2019-10-14 22:04:55,355 INFO L226 Difference]: Without dead ends: 2792 [2019-10-14 22:04:55,359 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:04:55,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2792 states. [2019-10-14 22:04:55,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2792 to 2773. [2019-10-14 22:04:55,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2773 states. [2019-10-14 22:04:55,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2773 states to 2773 states and 3896 transitions. [2019-10-14 22:04:55,440 INFO L78 Accepts]: Start accepts. Automaton has 2773 states and 3896 transitions. Word has length 119 [2019-10-14 22:04:55,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:55,441 INFO L462 AbstractCegarLoop]: Abstraction has 2773 states and 3896 transitions. [2019-10-14 22:04:55,441 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:55,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2773 states and 3896 transitions. [2019-10-14 22:04:55,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 22:04:55,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:55,444 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:55,444 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 2059459070, now seen corresponding path program 1 times [2019-10-14 22:04:55,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:55,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733835107] [2019-10-14 22:04:55,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:55,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:55,445 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:55,703 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:55,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733835107] [2019-10-14 22:04:55,704 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:55,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:55,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306931686] [2019-10-14 22:04:55,705 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:55,705 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:55,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:55,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:55,706 INFO L87 Difference]: Start difference. First operand 2773 states and 3896 transitions. Second operand 9 states. [2019-10-14 22:05:01,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:01,776 INFO L93 Difference]: Finished difference Result 9052 states and 13211 transitions. [2019-10-14 22:05:01,776 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:05:01,777 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-10-14 22:05:01,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:01,805 INFO L225 Difference]: With dead ends: 9052 [2019-10-14 22:05:01,805 INFO L226 Difference]: Without dead ends: 6285 [2019-10-14 22:05:01,812 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:05:01,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6285 states. [2019-10-14 22:05:01,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6285 to 6259. [2019-10-14 22:05:01,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6259 states. [2019-10-14 22:05:01,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6259 states to 6259 states and 8349 transitions. [2019-10-14 22:05:01,986 INFO L78 Accepts]: Start accepts. Automaton has 6259 states and 8349 transitions. Word has length 123 [2019-10-14 22:05:01,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:01,987 INFO L462 AbstractCegarLoop]: Abstraction has 6259 states and 8349 transitions. [2019-10-14 22:05:01,987 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:05:01,987 INFO L276 IsEmpty]: Start isEmpty. Operand 6259 states and 8349 transitions. [2019-10-14 22:05:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2019-10-14 22:05:02,002 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:02,003 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:02,003 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:02,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:02,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1075962294, now seen corresponding path program 1 times [2019-10-14 22:05:02,004 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:02,004 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395331652] [2019-10-14 22:05:02,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,005 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:02,005 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 201 proven. 82 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 22:05:02,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395331652] [2019-10-14 22:05:02,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166261151] [2019-10-14 22:05:02,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:02,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:02,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 607 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:02,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:03,115 INFO L134 CoverageAnalysis]: Checked inductivity of 377 backedges. 334 proven. 2 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-10-14 22:05:03,116 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:03,116 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-10-14 22:05:03,117 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540915025] [2019-10-14 22:05:03,118 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:03,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:03,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:03,119 INFO L87 Difference]: Start difference. First operand 6259 states and 8349 transitions. Second operand 11 states. [2019-10-14 22:05:07,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:07,506 INFO L93 Difference]: Finished difference Result 15628 states and 21508 transitions. [2019-10-14 22:05:07,506 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:05:07,507 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 381 [2019-10-14 22:05:07,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:07,561 INFO L225 Difference]: With dead ends: 15628 [2019-10-14 22:05:07,561 INFO L226 Difference]: Without dead ends: 9375 [2019-10-14 22:05:07,577 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 388 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:05:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9375 states. [2019-10-14 22:05:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9375 to 6953. [2019-10-14 22:05:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6953 states. [2019-10-14 22:05:07,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6953 states to 6953 states and 9195 transitions. [2019-10-14 22:05:07,814 INFO L78 Accepts]: Start accepts. Automaton has 6953 states and 9195 transitions. Word has length 381 [2019-10-14 22:05:07,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:07,815 INFO L462 AbstractCegarLoop]: Abstraction has 6953 states and 9195 transitions. [2019-10-14 22:05:07,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:07,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6953 states and 9195 transitions. [2019-10-14 22:05:07,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2019-10-14 22:05:07,826 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:07,827 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:05:08,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:08,035 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:08,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1852265774, now seen corresponding path program 1 times [2019-10-14 22:05:08,036 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:08,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758581232] [2019-10-14 22:05:08,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,037 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:08,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:08,916 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 221 proven. 114 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-14 22:05:08,916 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758581232] [2019-10-14 22:05:08,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852061867] [2019-10-14 22:05:08,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:09,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:09,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 336 proven. 2 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2019-10-14 22:05:09,199 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:09,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:05:09,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845518827] [2019-10-14 22:05:09,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:05:09,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:09,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:05:09,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:09,202 INFO L87 Difference]: Start difference. First operand 6953 states and 9195 transitions. Second operand 12 states.