java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:18,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:18,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:18,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:18,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:18,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:18,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:18,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:18,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:18,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:18,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:18,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:18,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:18,225 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:18,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:18,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:18,232 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:18,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:18,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:18,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:18,245 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:18,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:18,248 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:18,249 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:18,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:18,257 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:18,258 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:18,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:18,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:18,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:18,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:18,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:18,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:18,263 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:18,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:18,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:18,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:18,288 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:18,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:18,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:18,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:18,290 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:18,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:18,291 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:18,291 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:18,291 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:18,291 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:18,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:18,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:18,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:18,294 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:18,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:18,294 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:18,294 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:18,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:18,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:18,295 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:18,295 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:18,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:18,295 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:18,296 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:18,608 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:18,627 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:18,631 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:18,632 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:18,633 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:18,633 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-13 18:02:18,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa98f754/7d816e176ba2402cae7733c04c4d081a/FLAGf847312e7 [2019-10-13 18:02:19,308 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:19,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label15.c [2019-10-13 18:02:19,332 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa98f754/7d816e176ba2402cae7733c04c4d081a/FLAGf847312e7 [2019-10-13 18:02:19,578 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9aa98f754/7d816e176ba2402cae7733c04c4d081a [2019-10-13 18:02:19,588 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:19,590 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:19,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:19,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:19,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:19,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,598 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34791942 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:19, skipping insertion in model container [2019-10-13 18:02:19,599 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:19" (1/1) ... [2019-10-13 18:02:19,606 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:19,677 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:20,256 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:20,261 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:20,378 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:20,398 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:20,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20 WrapperNode [2019-10-13 18:02:20,399 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:20,400 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:20,400 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:20,400 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:20,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,432 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,432 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... [2019-10-13 18:02:20,529 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:20,530 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:20,530 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:20,530 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:20,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:20,609 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:20,611 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:21,998 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:21,999 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:22,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:22 BoogieIcfgContainer [2019-10-13 18:02:22,000 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:22,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:22,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:22,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:22,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:19" (1/3) ... [2019-10-13 18:02:22,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5f6656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:22, skipping insertion in model container [2019-10-13 18:02:22,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:20" (2/3) ... [2019-10-13 18:02:22,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5f6656 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:22, skipping insertion in model container [2019-10-13 18:02:22,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:22" (3/3) ... [2019-10-13 18:02:22,009 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label15.c [2019-10-13 18:02:22,019 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:22,027 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:22,038 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:22,066 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:22,066 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:22,066 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:22,067 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:22,067 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:22,067 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:22,067 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:22,067 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:22,092 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:22,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-13 18:02:22,102 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:22,103 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:22,105 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:22,111 INFO L82 PathProgramCache]: Analyzing trace with hash -598870286, now seen corresponding path program 1 times [2019-10-13 18:02:22,120 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:22,120 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19241060] [2019-10-13 18:02:22,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,121 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:22,121 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:22,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:22,591 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19241060] [2019-10-13 18:02:22,592 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:22,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:22,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220871137] [2019-10-13 18:02:22,600 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:22,601 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:22,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:22,623 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:24,989 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:24,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:24,992 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 71 [2019-10-13 18:02:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:25,014 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:25,014 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:25,024 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:25,129 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 71 [2019-10-13 18:02:25,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:25,130 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:25,130 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:25,130 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2019-10-13 18:02:25,138 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:25,139 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, 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] [2019-10-13 18:02:25,139 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:25,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 96309737, now seen corresponding path program 1 times [2019-10-13 18:02:25,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:25,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452851270] [2019-10-13 18:02:25,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,140 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:25,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,509 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:25,511 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452851270] [2019-10-13 18:02:25,511 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:25,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:25,512 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718117517] [2019-10-13 18:02:25,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:25,517 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:25,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:25,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:25,518 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:28,002 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-13 18:02:28,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:28,003 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 140 [2019-10-13 18:02:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:28,016 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 18:02:28,016 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 18:02:28,019 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:28,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 18:02:28,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-10-13 18:02:28,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-13 18:02:28,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-10-13 18:02:28,119 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 140 [2019-10-13 18:02:28,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:28,122 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-10-13 18:02:28,122 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:28,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-10-13 18:02:28,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 18:02:28,133 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:28,134 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, 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] [2019-10-13 18:02:28,134 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:28,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:28,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1593048690, now seen corresponding path program 1 times [2019-10-13 18:02:28,135 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:28,137 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312205457] [2019-10-13 18:02:28,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:28,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:28,386 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:28,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312205457] [2019-10-13 18:02:28,387 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:28,388 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:28,388 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106250326] [2019-10-13 18:02:28,389 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:28,389 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:28,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:28,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:28,390 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-10-13 18:02:30,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:30,194 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-10-13 18:02:30,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:30,198 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-10-13 18:02:30,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:30,211 INFO L225 Difference]: With dead ends: 2856 [2019-10-13 18:02:30,212 INFO L226 Difference]: Without dead ends: 1734 [2019-10-13 18:02:30,215 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 [2019-10-13 18:02:30,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-10-13 18:02:30,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-10-13 18:02:30,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-10-13 18:02:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-10-13 18:02:30,287 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 141 [2019-10-13 18:02:30,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:30,289 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-10-13 18:02:30,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:30,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-10-13 18:02:30,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2019-10-13 18:02:30,291 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:30,292 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, 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] [2019-10-13 18:02:30,292 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:30,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:30,292 INFO L82 PathProgramCache]: Analyzing trace with hash -552951950, now seen corresponding path program 1 times [2019-10-13 18:02:30,293 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:30,293 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520147014] [2019-10-13 18:02:30,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,294 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:30,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,565 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:30,566 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520147014] [2019-10-13 18:02:30,566 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:30,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:30,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429686797] [2019-10-13 18:02:30,567 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:30,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:30,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:30,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:30,568 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-10-13 18:02:32,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:32,422 INFO L93 Difference]: Finished difference Result 4296 states and 6639 transitions. [2019-10-13 18:02:32,423 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:32,424 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 143 [2019-10-13 18:02:32,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:32,446 INFO L225 Difference]: With dead ends: 4296 [2019-10-13 18:02:32,446 INFO L226 Difference]: Without dead ends: 2596 [2019-10-13 18:02:32,452 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:32,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2019-10-13 18:02:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2094. [2019-10-13 18:02:32,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-10-13 18:02:32,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2889 transitions. [2019-10-13 18:02:32,564 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2889 transitions. Word has length 143 [2019-10-13 18:02:32,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:32,565 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2889 transitions. [2019-10-13 18:02:32,565 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:32,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2889 transitions. [2019-10-13 18:02:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 18:02:32,570 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:32,570 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:32,570 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:32,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:32,571 INFO L82 PathProgramCache]: Analyzing trace with hash -621255906, now seen corresponding path program 1 times [2019-10-13 18:02:32,571 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:32,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722019156] [2019-10-13 18:02:32,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:32,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 129 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:32,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722019156] [2019-10-13 18:02:32,854 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283752068] [2019-10-13 18:02:32,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:32,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:33,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:33,144 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:33,144 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:33,144 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:33,145 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290296481] [2019-10-13 18:02:33,145 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:33,146 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:33,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:33,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:33,146 INFO L87 Difference]: Start difference. First operand 2094 states and 2889 transitions. Second operand 3 states. [2019-10-13 18:02:34,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:34,011 INFO L93 Difference]: Finished difference Result 4918 states and 6767 transitions. [2019-10-13 18:02:34,014 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:34,014 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 227 [2019-10-13 18:02:34,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:34,028 INFO L225 Difference]: With dead ends: 4918 [2019-10-13 18:02:34,028 INFO L226 Difference]: Without dead ends: 2830 [2019-10-13 18:02:34,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2019-10-13 18:02:34,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2644. [2019-10-13 18:02:34,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2019-10-13 18:02:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3578 transitions. [2019-10-13 18:02:34,111 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3578 transitions. Word has length 227 [2019-10-13 18:02:34,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:34,114 INFO L462 AbstractCegarLoop]: Abstraction has 2644 states and 3578 transitions. [2019-10-13 18:02:34,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3578 transitions. [2019-10-13 18:02:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2019-10-13 18:02:34,122 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:34,122 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:34,331 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,332 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:34,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1502863669, now seen corresponding path program 1 times [2019-10-13 18:02:34,333 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:34,333 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26514775] [2019-10-13 18:02:34,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,333 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:34,334 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,864 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 224 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:34,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26514775] [2019-10-13 18:02:34,865 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684712232] [2019-10-13 18:02:34,865 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,958 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:34,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 227 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:35,043 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:35,052 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-10-13 18:02:35,052 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775679026] [2019-10-13 18:02:35,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:35,053 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:35,056 INFO L87 Difference]: Start difference. First operand 2644 states and 3578 transitions. Second operand 3 states. [2019-10-13 18:02:35,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:35,940 INFO L93 Difference]: Finished difference Result 5100 states and 6954 transitions. [2019-10-13 18:02:35,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:35,941 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 282 [2019-10-13 18:02:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:35,953 INFO L225 Difference]: With dead ends: 5100 [2019-10-13 18:02:35,954 INFO L226 Difference]: Without dead ends: 2644 [2019-10-13 18:02:35,959 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:35,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-10-13 18:02:36,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2278. [2019-10-13 18:02:36,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-13 18:02:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3024 transitions. [2019-10-13 18:02:36,022 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3024 transitions. Word has length 282 [2019-10-13 18:02:36,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:36,023 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3024 transitions. [2019-10-13 18:02:36,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:36,023 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3024 transitions. [2019-10-13 18:02:36,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2019-10-13 18:02:36,033 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:36,033 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:36,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:36,243 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:36,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:36,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1660138625, now seen corresponding path program 1 times [2019-10-13 18:02:36,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:36,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740402720] [2019-10-13 18:02:36,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:36,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:36,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 237 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:36,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740402720] [2019-10-13 18:02:36,846 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785666200] [2019-10-13 18:02:36,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:36,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:36,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 519 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:36,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:36,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 175 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 18:02:37,112 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:37,112 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 18:02:37,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112868123] [2019-10-13 18:02:37,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:37,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:37,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:37,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:02:37,114 INFO L87 Difference]: Start difference. First operand 2278 states and 3024 transitions. Second operand 5 states. [2019-10-13 18:02:38,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:38,441 INFO L93 Difference]: Finished difference Result 4396 states and 5902 transitions. [2019-10-13 18:02:38,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:38,442 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 336 [2019-10-13 18:02:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:38,455 INFO L225 Difference]: With dead ends: 4396 [2019-10-13 18:02:38,455 INFO L226 Difference]: Without dead ends: 2308 [2019-10-13 18:02:38,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2019-10-13 18:02:38,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2288. [2019-10-13 18:02:38,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2019-10-13 18:02:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2998 transitions. [2019-10-13 18:02:38,538 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2998 transitions. Word has length 336 [2019-10-13 18:02:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:38,538 INFO L462 AbstractCegarLoop]: Abstraction has 2288 states and 2998 transitions. [2019-10-13 18:02:38,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2998 transitions. [2019-10-13 18:02:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2019-10-13 18:02:38,550 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:38,550 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, 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, 2, 2, 2, 2, 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] [2019-10-13 18:02:38,754 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:38,755 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:38,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:38,755 INFO L82 PathProgramCache]: Analyzing trace with hash -178670679, now seen corresponding path program 1 times [2019-10-13 18:02:38,756 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:38,756 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490726877] [2019-10-13 18:02:38,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:38,757 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:38,757 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 202 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:40,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490726877] [2019-10-13 18:02:40,528 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096014654] [2019-10-13 18:02:40,529 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:40,663 INFO L256 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:40,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:40,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 354 proven. 53 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2019-10-13 18:02:41,302 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:41,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:41,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994313598] [2019-10-13 18:02:41,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:41,304 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:41,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:41,306 INFO L87 Difference]: Start difference. First operand 2288 states and 2998 transitions. Second operand 16 states. [2019-10-13 18:02:45,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:45,125 INFO L93 Difference]: Finished difference Result 4512 states and 5985 transitions. [2019-10-13 18:02:45,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:02:45,126 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 420 [2019-10-13 18:02:45,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:45,138 INFO L225 Difference]: With dead ends: 4512 [2019-10-13 18:02:45,138 INFO L226 Difference]: Without dead ends: 2363 [2019-10-13 18:02:45,144 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:02:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-10-13 18:02:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2278. [2019-10-13 18:02:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-13 18:02:45,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2741 transitions. [2019-10-13 18:02:45,207 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2741 transitions. Word has length 420 [2019-10-13 18:02:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:45,208 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 2741 transitions. [2019-10-13 18:02:45,208 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2741 transitions. [2019-10-13 18:02:45,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2019-10-13 18:02:45,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:45,224 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2019-10-13 18:02:45,428 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:45,430 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:45,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1287394298, now seen corresponding path program 1 times [2019-10-13 18:02:45,432 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:45,432 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439413270] [2019-10-13 18:02:45,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:45,433 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:45,433 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,157 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 482 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:02:46,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439413270] [2019-10-13 18:02:46,158 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143920547] [2019-10-13 18:02:46,158 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:46,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:46,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:46,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:46,568 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 742 proven. 2 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-10-13 18:02:46,569 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:46,569 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:02:46,569 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704831116] [2019-10-13 18:02:46,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:46,570 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:46,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:46,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:46,571 INFO L87 Difference]: Start difference. First operand 2278 states and 2741 transitions. Second operand 9 states. [2019-10-13 18:02:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:48,707 INFO L93 Difference]: Finished difference Result 4926 states and 6003 transitions. [2019-10-13 18:02:48,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:02:48,715 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 555 [2019-10-13 18:02:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:48,728 INFO L225 Difference]: With dead ends: 4926 [2019-10-13 18:02:48,728 INFO L226 Difference]: Without dead ends: 2838 [2019-10-13 18:02:48,733 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 568 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2019-10-13 18:02:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2652. [2019-10-13 18:02:48,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-10-13 18:02:48,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3110 transitions. [2019-10-13 18:02:48,795 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3110 transitions. Word has length 555 [2019-10-13 18:02:48,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:48,795 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3110 transitions. [2019-10-13 18:02:48,796 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:48,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3110 transitions. [2019-10-13 18:02:48,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 640 [2019-10-13 18:02:48,816 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:48,816 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2019-10-13 18:02:49,021 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:49,021 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:49,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:49,022 INFO L82 PathProgramCache]: Analyzing trace with hash -687518034, now seen corresponding path program 1 times [2019-10-13 18:02:49,022 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:49,022 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760882889] [2019-10-13 18:02:49,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:49,022 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:49,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:49,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 638 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:02:51,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760882889] [2019-10-13 18:02:51,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127998834] [2019-10-13 18:02:51,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:51,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:51,172 INFO L256 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:02:51,181 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:51,214 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1315 backedges. 977 proven. 2 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2019-10-13 18:02:51,905 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:51,905 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:02:51,905 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543541020] [2019-10-13 18:02:51,907 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:02:51,907 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:51,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:02:51,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:51,908 INFO L87 Difference]: Start difference. First operand 2652 states and 3110 transitions. Second operand 12 states.