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/Problem11_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:14,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:14,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:14,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:14,266 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:14,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:14,268 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:14,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:14,272 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:14,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:14,273 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:14,274 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:14,275 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:14,276 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:14,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:14,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:14,278 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:14,279 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:14,281 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:14,283 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:14,284 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:14,285 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:14,286 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:14,287 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:14,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:14,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:14,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:14,294 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:14,295 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:14,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:14,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:14,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:14,297 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:14,297 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:14,298 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:14,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:14,299 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:59:14,323 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:14,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:14,325 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:14,325 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:14,325 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:14,326 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:14,326 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:14,326 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:14,326 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:14,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:14,327 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:14,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:14,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:14,329 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:14,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:14,330 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:14,330 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:14,330 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:14,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:14,330 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:14,331 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:14,331 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:14,331 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:14,331 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:14,592 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:14,605 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:14,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:14,610 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:14,611 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:14,611 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-14 21:59:14,688 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/309d6f2a0/d6c5cc7767b9495ab1d957ec503aef5b/FLAGdc7d63226 [2019-10-14 21:59:15,263 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:15,265 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label30.c [2019-10-14 21:59:15,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/309d6f2a0/d6c5cc7767b9495ab1d957ec503aef5b/FLAGdc7d63226 [2019-10-14 21:59:15,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/309d6f2a0/d6c5cc7767b9495ab1d957ec503aef5b [2019-10-14 21:59:15,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:15,491 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:15,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:15,492 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:15,495 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:15,496 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:15" (1/1) ... [2019-10-14 21:59:15,499 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@691de8d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:15, skipping insertion in model container [2019-10-14 21:59:15,499 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:15" (1/1) ... [2019-10-14 21:59:15,506 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:15,564 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:16,235 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:16,249 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:16,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:16,553 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:16,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16 WrapperNode [2019-10-14 21:59:16,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:16,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:16,555 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:16,555 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:16,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,600 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,691 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... [2019-10-14 21:59:16,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:16,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:16,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:16,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:16,726 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:16,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:16,788 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:16,788 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:16,789 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:16,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:59:18,586 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:59:18,586 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:59:18,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:18 BoogieIcfgContainer [2019-10-14 21:59:18,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:59:18,591 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:59:18,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:59:18,597 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:59:18,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:15" (1/3) ... [2019-10-14 21:59:18,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302e09d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:18, skipping insertion in model container [2019-10-14 21:59:18,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:16" (2/3) ... [2019-10-14 21:59:18,599 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@302e09d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:59:18, skipping insertion in model container [2019-10-14 21:59:18,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:59:18" (3/3) ... [2019-10-14 21:59:18,608 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label30.c [2019-10-14 21:59:18,620 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:59:18,630 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:59:18,642 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:59:18,687 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:59:18,687 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:59:18,689 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:59:18,689 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:59:18,689 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:59:18,690 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:59:18,690 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:59:18,690 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:59:18,728 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 21:59:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:59:18,736 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:18,737 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] [2019-10-14 21:59:18,739 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:18,745 INFO L82 PathProgramCache]: Analyzing trace with hash 506629546, now seen corresponding path program 1 times [2019-10-14 21:59:18,754 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:18,754 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338388087] [2019-10-14 21:59:18,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:18,755 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:18,755 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:19,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:19,218 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338388087] [2019-10-14 21:59:19,218 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:19,219 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:59:19,219 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451762195] [2019-10-14 21:59:19,224 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:19,224 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:19,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:59:19,241 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 21:59:22,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:22,590 INFO L93 Difference]: Finished difference Result 1009 states and 1797 transitions. [2019-10-14 21:59:22,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:59:22,593 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-14 21:59:22,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:22,613 INFO L225 Difference]: With dead ends: 1009 [2019-10-14 21:59:22,614 INFO L226 Difference]: Without dead ends: 633 [2019-10-14 21:59:22,623 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 21:59:22,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2019-10-14 21:59:22,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 626. [2019-10-14 21:59:22,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 626 states. [2019-10-14 21:59:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 626 states to 626 states and 903 transitions. [2019-10-14 21:59:22,725 INFO L78 Accepts]: Start accepts. Automaton has 626 states and 903 transitions. Word has length 35 [2019-10-14 21:59:22,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:22,726 INFO L462 AbstractCegarLoop]: Abstraction has 626 states and 903 transitions. [2019-10-14 21:59:22,726 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:22,726 INFO L276 IsEmpty]: Start isEmpty. Operand 626 states and 903 transitions. [2019-10-14 21:59:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 21:59:22,731 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:22,731 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:22,732 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:22,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:22,732 INFO L82 PathProgramCache]: Analyzing trace with hash -295507094, now seen corresponding path program 1 times [2019-10-14 21:59:22,732 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:22,733 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860888314] [2019-10-14 21:59:22,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:22,733 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:22,733 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:23,032 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:23,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860888314] [2019-10-14 21:59:23,034 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:23,034 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:59:23,034 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615930753] [2019-10-14 21:59:23,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:59:23,039 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:23,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:59:23,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:59:23,040 INFO L87 Difference]: Start difference. First operand 626 states and 903 transitions. Second operand 9 states. [2019-10-14 21:59:25,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:25,964 INFO L93 Difference]: Finished difference Result 2436 states and 3670 transitions. [2019-10-14 21:59:25,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:59:25,965 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 107 [2019-10-14 21:59:25,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:25,977 INFO L225 Difference]: With dead ends: 2436 [2019-10-14 21:59:25,978 INFO L226 Difference]: Without dead ends: 1816 [2019-10-14 21:59:25,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:59:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2019-10-14 21:59:26,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1777. [2019-10-14 21:59:26,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1777 states. [2019-10-14 21:59:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1777 states to 1777 states and 2527 transitions. [2019-10-14 21:59:26,055 INFO L78 Accepts]: Start accepts. Automaton has 1777 states and 2527 transitions. Word has length 107 [2019-10-14 21:59:26,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:26,056 INFO L462 AbstractCegarLoop]: Abstraction has 1777 states and 2527 transitions. [2019-10-14 21:59:26,056 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:59:26,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1777 states and 2527 transitions. [2019-10-14 21:59:26,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2019-10-14 21:59:26,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:26,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:26,067 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:26,067 INFO L82 PathProgramCache]: Analyzing trace with hash 388493337, now seen corresponding path program 1 times [2019-10-14 21:59:26,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:26,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80016501] [2019-10-14 21:59:26,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:26,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:26,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:26,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:26,290 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:26,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80016501] [2019-10-14 21:59:26,290 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25493720] [2019-10-14 21:59:26,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:26,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:26,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:26,468 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:26,469 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:59:26,469 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86195989] [2019-10-14 21:59:26,470 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:26,470 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:26,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:26,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:26,480 INFO L87 Difference]: Start difference. First operand 1777 states and 2527 transitions. Second operand 3 states. [2019-10-14 21:59:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:27,474 INFO L93 Difference]: Finished difference Result 4128 states and 5882 transitions. [2019-10-14 21:59:27,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:27,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 108 [2019-10-14 21:59:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:27,495 INFO L225 Difference]: With dead ends: 4128 [2019-10-14 21:59:27,495 INFO L226 Difference]: Without dead ends: 2357 [2019-10-14 21:59:27,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:27,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2019-10-14 21:59:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2349. [2019-10-14 21:59:27,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:59:27,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3262 transitions. [2019-10-14 21:59:27,583 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3262 transitions. Word has length 108 [2019-10-14 21:59:27,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:27,584 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3262 transitions. [2019-10-14 21:59:27,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3262 transitions. [2019-10-14 21:59:27,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 21:59:27,589 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:27,590 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:27,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:27,794 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:27,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:27,794 INFO L82 PathProgramCache]: Analyzing trace with hash -27102898, now seen corresponding path program 1 times [2019-10-14 21:59:27,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:27,794 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26674309] [2019-10-14 21:59:27,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:27,795 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:27,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:27,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:27,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:27,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26674309] [2019-10-14 21:59:27,995 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966030797] [2019-10-14 21:59:27,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:28,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:28,077 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:28,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:28,103 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:28,103 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:59:28,103 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36361781] [2019-10-14 21:59:28,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:28,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:28,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:28,105 INFO L87 Difference]: Start difference. First operand 2349 states and 3262 transitions. Second operand 3 states. [2019-10-14 21:59:29,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:29,068 INFO L93 Difference]: Finished difference Result 4704 states and 6572 transitions. [2019-10-14 21:59:29,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:29,070 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 109 [2019-10-14 21:59:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:29,088 INFO L225 Difference]: With dead ends: 4704 [2019-10-14 21:59:29,088 INFO L226 Difference]: Without dead ends: 2361 [2019-10-14 21:59:29,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:29,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2019-10-14 21:59:29,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 2349. [2019-10-14 21:59:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2349 states. [2019-10-14 21:59:29,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2349 states to 2349 states and 3200 transitions. [2019-10-14 21:59:29,166 INFO L78 Accepts]: Start accepts. Automaton has 2349 states and 3200 transitions. Word has length 109 [2019-10-14 21:59:29,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:29,167 INFO L462 AbstractCegarLoop]: Abstraction has 2349 states and 3200 transitions. [2019-10-14 21:59:29,167 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:29,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2349 states and 3200 transitions. [2019-10-14 21:59:29,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 21:59:29,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:29,173 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:59:29,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:29,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:29,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash 204212222, now seen corresponding path program 1 times [2019-10-14 21:59:29,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:29,381 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230160730] [2019-10-14 21:59:29,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:29,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:29,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:29,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:29,629 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:29,630 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230160730] [2019-10-14 21:59:29,630 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:59:29,630 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 21:59:29,630 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047377446] [2019-10-14 21:59:29,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:59:29,631 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:29,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:59:29,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:29,632 INFO L87 Difference]: Start difference. First operand 2349 states and 3200 transitions. Second operand 7 states. [2019-10-14 21:59:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:32,120 INFO L93 Difference]: Finished difference Result 6927 states and 10053 transitions. [2019-10-14 21:59:32,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:59:32,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2019-10-14 21:59:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:32,142 INFO L225 Difference]: With dead ends: 6927 [2019-10-14 21:59:32,143 INFO L226 Difference]: Without dead ends: 4584 [2019-10-14 21:59:32,151 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:59:32,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4584 states. [2019-10-14 21:59:32,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4584 to 4339. [2019-10-14 21:59:32,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4339 states. [2019-10-14 21:59:32,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4339 states to 4339 states and 5749 transitions. [2019-10-14 21:59:32,261 INFO L78 Accepts]: Start accepts. Automaton has 4339 states and 5749 transitions. Word has length 133 [2019-10-14 21:59:32,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:32,262 INFO L462 AbstractCegarLoop]: Abstraction has 4339 states and 5749 transitions. [2019-10-14 21:59:32,262 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:59:32,262 INFO L276 IsEmpty]: Start isEmpty. Operand 4339 states and 5749 transitions. [2019-10-14 21:59:32,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2019-10-14 21:59:32,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:32,266 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:32,267 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:32,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:32,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1527930193, now seen corresponding path program 1 times [2019-10-14 21:59:32,267 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:32,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692721559] [2019-10-14 21:59:32,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:32,268 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:32,268 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:32,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:32,565 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692721559] [2019-10-14 21:59:32,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619079231] [2019-10-14 21:59:32,566 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:32,703 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:59:32,714 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:32,750 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:32,750 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 8 [2019-10-14 21:59:32,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054038447] [2019-10-14 21:59:32,751 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:59:32,751 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:59:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:59:32,752 INFO L87 Difference]: Start difference. First operand 4339 states and 5749 transitions. Second operand 8 states. [2019-10-14 21:59:34,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:34,801 INFO L93 Difference]: Finished difference Result 10686 states and 15152 transitions. [2019-10-14 21:59:34,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:59:34,802 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 180 [2019-10-14 21:59:34,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:34,832 INFO L225 Difference]: With dead ends: 10686 [2019-10-14 21:59:34,832 INFO L226 Difference]: Without dead ends: 6353 [2019-10-14 21:59:34,846 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 186 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:59:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6353 states. [2019-10-14 21:59:34,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6353 to 6072. [2019-10-14 21:59:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6072 states. [2019-10-14 21:59:34,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6072 states to 6072 states and 7774 transitions. [2019-10-14 21:59:34,990 INFO L78 Accepts]: Start accepts. Automaton has 6072 states and 7774 transitions. Word has length 180 [2019-10-14 21:59:34,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:34,990 INFO L462 AbstractCegarLoop]: Abstraction has 6072 states and 7774 transitions. [2019-10-14 21:59:34,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:59:34,990 INFO L276 IsEmpty]: Start isEmpty. Operand 6072 states and 7774 transitions. [2019-10-14 21:59:34,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2019-10-14 21:59:34,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:34,996 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:35,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:35,200 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:35,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:35,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1374428651, now seen corresponding path program 1 times [2019-10-14 21:59:35,201 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:35,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738495667] [2019-10-14 21:59:35,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:35,202 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:35,202 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:35,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:35,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:35,391 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 57 proven. 2 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:59:35,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738495667] [2019-10-14 21:59:35,392 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907203605] [2019-10-14 21:59:35,392 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:35,476 INFO L256 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:59:35,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2019-10-14 21:59:35,622 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:35,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:59:35,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209571107] [2019-10-14 21:59:35,623 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:59:35,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:35,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:59:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:35,625 INFO L87 Difference]: Start difference. First operand 6072 states and 7774 transitions. Second operand 3 states. [2019-10-14 21:59:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:36,777 INFO L93 Difference]: Finished difference Result 13284 states and 16998 transitions. [2019-10-14 21:59:36,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:59:36,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 198 [2019-10-14 21:59:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:36,819 INFO L225 Difference]: With dead ends: 13284 [2019-10-14 21:59:36,820 INFO L226 Difference]: Without dead ends: 7218 [2019-10-14 21:59:36,834 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:59:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7218 states. [2019-10-14 21:59:36,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7218 to 6462. [2019-10-14 21:59:36,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6462 states. [2019-10-14 21:59:36,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6462 states to 6462 states and 8221 transitions. [2019-10-14 21:59:36,980 INFO L78 Accepts]: Start accepts. Automaton has 6462 states and 8221 transitions. Word has length 198 [2019-10-14 21:59:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:36,981 INFO L462 AbstractCegarLoop]: Abstraction has 6462 states and 8221 transitions. [2019-10-14 21:59:36,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:59:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6462 states and 8221 transitions. [2019-10-14 21:59:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-10-14 21:59:36,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:36,988 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:37,201 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:37,202 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:37,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:37,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1495700069, now seen corresponding path program 1 times [2019-10-14 21:59:37,203 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:37,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320084309] [2019-10-14 21:59:37,203 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:37,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:37,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 66 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:37,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320084309] [2019-10-14 21:59:37,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878936075] [2019-10-14 21:59:37,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:37,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:59:37,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:37,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-14 21:59:37,886 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:59:37,886 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 16 [2019-10-14 21:59:37,887 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4985178] [2019-10-14 21:59:37,887 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:59:37,888 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:59:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:59:37,888 INFO L87 Difference]: Start difference. First operand 6462 states and 8221 transitions. Second operand 5 states. [2019-10-14 21:59:39,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:39,359 INFO L93 Difference]: Finished difference Result 12989 states and 16642 transitions. [2019-10-14 21:59:39,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:59:39,360 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 202 [2019-10-14 21:59:39,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:39,380 INFO L225 Difference]: With dead ends: 12989 [2019-10-14 21:59:39,380 INFO L226 Difference]: Without dead ends: 6533 [2019-10-14 21:59:39,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:59:39,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6533 states. [2019-10-14 21:59:39,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6533 to 6500. [2019-10-14 21:59:39,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6500 states. [2019-10-14 21:59:39,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6500 states to 6500 states and 8312 transitions. [2019-10-14 21:59:39,562 INFO L78 Accepts]: Start accepts. Automaton has 6500 states and 8312 transitions. Word has length 202 [2019-10-14 21:59:39,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:39,563 INFO L462 AbstractCegarLoop]: Abstraction has 6500 states and 8312 transitions. [2019-10-14 21:59:39,563 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:59:39,563 INFO L276 IsEmpty]: Start isEmpty. Operand 6500 states and 8312 transitions. [2019-10-14 21:59:39,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 21:59:39,567 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:39,568 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:39,771 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:39,772 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:39,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:39,773 INFO L82 PathProgramCache]: Analyzing trace with hash -917252579, now seen corresponding path program 1 times [2019-10-14 21:59:39,773 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:39,774 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736783001] [2019-10-14 21:59:39,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:39,775 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:39,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:39,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:39,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:40,064 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 124 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:40,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736783001] [2019-10-14 21:59:40,065 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588311488] [2019-10-14 21:59:40,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:40,171 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:59:40,174 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:40,260 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:40,260 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:40,261 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:59:40,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427998172] [2019-10-14 21:59:40,262 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:59:40,262 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:40,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:59:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:59:40,262 INFO L87 Difference]: Start difference. First operand 6500 states and 8312 transitions. Second operand 11 states. [2019-10-14 21:59:45,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:59:45,620 INFO L93 Difference]: Finished difference Result 14924 states and 20100 transitions. [2019-10-14 21:59:45,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:59:45,621 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 237 [2019-10-14 21:59:45,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:59:45,652 INFO L225 Difference]: With dead ends: 14924 [2019-10-14 21:59:45,653 INFO L226 Difference]: Without dead ends: 8430 [2019-10-14 21:59:45,668 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:59:45,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8430 states. [2019-10-14 21:59:45,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8430 to 8270. [2019-10-14 21:59:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8270 states. [2019-10-14 21:59:45,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8270 states to 8270 states and 10481 transitions. [2019-10-14 21:59:45,896 INFO L78 Accepts]: Start accepts. Automaton has 8270 states and 10481 transitions. Word has length 237 [2019-10-14 21:59:45,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:59:45,897 INFO L462 AbstractCegarLoop]: Abstraction has 8270 states and 10481 transitions. [2019-10-14 21:59:45,897 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:59:45,897 INFO L276 IsEmpty]: Start isEmpty. Operand 8270 states and 10481 transitions. [2019-10-14 21:59:45,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-14 21:59:45,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:59:45,905 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 21:59:46,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:46,111 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:59:46,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:59:46,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1023389104, now seen corresponding path program 1 times [2019-10-14 21:59:46,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:59:46,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796307733] [2019-10-14 21:59:46,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:46,112 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:59:46,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:59:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:46,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:46,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:46,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 87 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:59:46,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796307733] [2019-10-14 21:59:46,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274462037] [2019-10-14 21:59:46,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:59:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:59:46,676 INFO L256 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:59:46,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:59:46,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:46,735 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:59:46,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:59:47,114 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 57 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:59:47,114 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:59:47,114 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 19 [2019-10-14 21:59:47,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519584579] [2019-10-14 21:59:47,115 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:59:47,115 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:59:47,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:59:47,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:59:47,116 INFO L87 Difference]: Start difference. First operand 8270 states and 10481 transitions. Second operand 19 states.