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/Problem15_label42.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:04:11,230 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:04:11,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:04:11,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:04:11,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:04:11,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:04:11,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:04:11,250 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:04:11,251 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:04:11,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:04:11,253 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:04:11,254 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:04:11,255 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:04:11,256 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:04:11,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:04:11,258 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:04:11,258 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:04:11,259 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:04:11,261 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:04:11,263 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:04:11,264 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:04:11,265 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:04:11,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:04:11,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:04:11,269 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:04:11,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:04:11,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:04:11,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:04:11,274 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:04:11,275 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:04:11,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:04:11,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:04:11,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:04:11,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:04:11,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:04:11,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:04:11,279 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 18:04:11,298 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:04:11,299 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:04:11,302 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:04:11,302 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:04:11,303 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:04:11,303 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:04:11,303 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:04:11,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:04:11,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:04:11,304 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:04:11,305 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:04:11,305 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:04:11,305 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:04:11,305 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:04:11,306 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:04:11,306 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:04:11,306 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:04:11,306 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:04:11,307 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:04:11,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:04:11,308 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:04:11,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:04:11,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:04:11,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:04:11,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:04:11,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:04:11,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:04:11,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:04:11,313 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:04:11,581 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:04:11,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:04:11,606 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:04:11,608 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:04:11,608 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:04:11,609 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-13 18:04:11,689 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a55d54aa/c630db9ad7d44b37a341ee546e3d72fe/FLAG11fb1bf73 [2019-10-13 18:04:12,394 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:04:12,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label42.c [2019-10-13 18:04:12,416 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a55d54aa/c630db9ad7d44b37a341ee546e3d72fe/FLAG11fb1bf73 [2019-10-13 18:04:12,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a55d54aa/c630db9ad7d44b37a341ee546e3d72fe [2019-10-13 18:04:12,622 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:04:12,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:04:12,627 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:12,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:04:12,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:04:12,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:12" (1/1) ... [2019-10-13 18:04:12,635 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39ccb2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:12, skipping insertion in model container [2019-10-13 18:04:12,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:04:12" (1/1) ... [2019-10-13 18:04:12,643 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:04:12,723 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:04:13,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:13,689 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:04:14,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:04:14,098 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:04:14,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14 WrapperNode [2019-10-13 18:04:14,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:04:14,100 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:04:14,101 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:04:14,101 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:04:14,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,273 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,289 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (1/1) ... [2019-10-13 18:04:14,314 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:04:14,315 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:04:14,315 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:04:14,315 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:04:14,316 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (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 18:04:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:04:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:04:14,384 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:04:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:04:14,385 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:04:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:04:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:04:14,385 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:04:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:04:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:04:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:04:14,386 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:04:14,387 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:04:18,178 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:04:18,178 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:04:18,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:18 BoogieIcfgContainer [2019-10-13 18:04:18,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:04:18,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:04:18,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:04:18,184 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:04:18,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:04:12" (1/3) ... [2019-10-13 18:04:18,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf8b56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:18, skipping insertion in model container [2019-10-13 18:04:18,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:04:14" (2/3) ... [2019-10-13 18:04:18,186 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bf8b56c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:04:18, skipping insertion in model container [2019-10-13 18:04:18,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:04:18" (3/3) ... [2019-10-13 18:04:18,188 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label42.c [2019-10-13 18:04:18,198 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:04:18,206 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:04:18,217 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:04:18,247 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:04:18,247 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:04:18,247 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:04:18,247 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:04:18,247 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:04:18,248 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:04:18,248 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:04:18,248 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:04:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-13 18:04:18,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 18:04:18,284 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:18,285 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] [2019-10-13 18:04:18,287 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:18,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:18,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2044127672, now seen corresponding path program 1 times [2019-10-13 18:04:18,301 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:18,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769247985] [2019-10-13 18:04:18,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,302 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:18,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:18,648 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 18:04:18,649 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769247985] [2019-10-13 18:04:18,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:18,650 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:04:18,650 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703706016] [2019-10-13 18:04:18,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:04:18,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:18,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:04:18,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:04:18,673 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-13 18:04:26,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:26,275 INFO L93 Difference]: Finished difference Result 1576 states and 2877 transitions. [2019-10-13 18:04:26,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:04:26,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 52 [2019-10-13 18:04:26,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:26,316 INFO L225 Difference]: With dead ends: 1576 [2019-10-13 18:04:26,316 INFO L226 Difference]: Without dead ends: 1056 [2019-10-13 18:04:26,332 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 [2019-10-13 18:04:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2019-10-13 18:04:26,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1029. [2019-10-13 18:04:26,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1029 states. [2019-10-13 18:04:26,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 1656 transitions. [2019-10-13 18:04:26,490 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 1656 transitions. Word has length 52 [2019-10-13 18:04:26,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:26,493 INFO L462 AbstractCegarLoop]: Abstraction has 1029 states and 1656 transitions. [2019-10-13 18:04:26,493 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:04:26,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 1656 transitions. [2019-10-13 18:04:26,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 18:04:26,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:26,511 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:26,511 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash 147073843, now seen corresponding path program 1 times [2019-10-13 18:04:26,513 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:26,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380312814] [2019-10-13 18:04:26,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:26,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:26,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:26,944 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:26,945 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380312814] [2019-10-13 18:04:26,946 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:26,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:04:26,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975995447] [2019-10-13 18:04:26,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:04:26,954 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:26,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:04:26,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:04:26,955 INFO L87 Difference]: Start difference. First operand 1029 states and 1656 transitions. Second operand 8 states. [2019-10-13 18:04:32,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:32,805 INFO L93 Difference]: Finished difference Result 3054 states and 5010 transitions. [2019-10-13 18:04:32,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:04:32,807 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 124 [2019-10-13 18:04:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:32,822 INFO L225 Difference]: With dead ends: 3054 [2019-10-13 18:04:32,823 INFO L226 Difference]: Without dead ends: 2031 [2019-10-13 18:04:32,828 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:04:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2031 states. [2019-10-13 18:04:32,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2031 to 1984. [2019-10-13 18:04:32,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1984 states. [2019-10-13 18:04:32,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1984 states to 1984 states and 2774 transitions. [2019-10-13 18:04:32,902 INFO L78 Accepts]: Start accepts. Automaton has 1984 states and 2774 transitions. Word has length 124 [2019-10-13 18:04:32,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:32,904 INFO L462 AbstractCegarLoop]: Abstraction has 1984 states and 2774 transitions. [2019-10-13 18:04:32,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:04:32,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1984 states and 2774 transitions. [2019-10-13 18:04:32,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 18:04:32,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:32,914 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:32,914 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:32,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:32,916 INFO L82 PathProgramCache]: Analyzing trace with hash -855279069, now seen corresponding path program 1 times [2019-10-13 18:04:32,916 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:32,916 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878270023] [2019-10-13 18:04:32,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:32,917 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:32,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,123 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:33,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878270023] [2019-10-13 18:04:33,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946561916] [2019-10-13 18:04:33,124 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 18:04:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:33,207 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:33,224 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:33,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:33,305 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:33,305 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:33,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144197067] [2019-10-13 18:04:33,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:33,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:33,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:33,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:33,308 INFO L87 Difference]: Start difference. First operand 1984 states and 2774 transitions. Second operand 3 states. [2019-10-13 18:04:35,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:35,767 INFO L93 Difference]: Finished difference Result 5829 states and 8292 transitions. [2019-10-13 18:04:35,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:35,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 132 [2019-10-13 18:04:35,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:35,789 INFO L225 Difference]: With dead ends: 5829 [2019-10-13 18:04:35,789 INFO L226 Difference]: Without dead ends: 3851 [2019-10-13 18:04:35,796 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 135 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 18:04:35,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2019-10-13 18:04:35,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 3851. [2019-10-13 18:04:35,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3851 states. [2019-10-13 18:04:35,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3851 states to 3851 states and 5029 transitions. [2019-10-13 18:04:35,909 INFO L78 Accepts]: Start accepts. Automaton has 3851 states and 5029 transitions. Word has length 132 [2019-10-13 18:04:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:35,912 INFO L462 AbstractCegarLoop]: Abstraction has 3851 states and 5029 transitions. [2019-10-13 18:04:35,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:35,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3851 states and 5029 transitions. [2019-10-13 18:04:35,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-13 18:04:35,916 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:35,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:36,123 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:36,123 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:36,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:36,124 INFO L82 PathProgramCache]: Analyzing trace with hash -421349109, now seen corresponding path program 1 times [2019-10-13 18:04:36,124 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:36,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272002509] [2019-10-13 18:04:36,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:36,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:36,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:36,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:36,571 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:36,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272002509] [2019-10-13 18:04:36,572 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:04:36,572 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:04:36,572 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415230611] [2019-10-13 18:04:36,575 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:04:36,575 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:36,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:04:36,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:04:36,577 INFO L87 Difference]: Start difference. First operand 3851 states and 5029 transitions. Second operand 9 states. [2019-10-13 18:04:45,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:45,149 INFO L93 Difference]: Finished difference Result 11519 states and 15425 transitions. [2019-10-13 18:04:45,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:04:45,150 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 151 [2019-10-13 18:04:45,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:45,190 INFO L225 Difference]: With dead ends: 11519 [2019-10-13 18:04:45,191 INFO L226 Difference]: Without dead ends: 7674 [2019-10-13 18:04:45,203 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:04:45,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7674 states. [2019-10-13 18:04:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7674 to 7348. [2019-10-13 18:04:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7348 states. [2019-10-13 18:04:45,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 9052 transitions. [2019-10-13 18:04:45,414 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 9052 transitions. Word has length 151 [2019-10-13 18:04:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:45,416 INFO L462 AbstractCegarLoop]: Abstraction has 7348 states and 9052 transitions. [2019-10-13 18:04:45,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:04:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 9052 transitions. [2019-10-13 18:04:45,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-13 18:04:45,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:45,423 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:45,423 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash 275964931, now seen corresponding path program 1 times [2019-10-13 18:04:45,424 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:45,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141109034] [2019-10-13 18:04:45,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:45,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:45,424 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:45,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:45,898 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:45,899 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141109034] [2019-10-13 18:04:45,900 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092118665] [2019-10-13 18:04:45,900 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 18:04:46,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:46,011 INFO L256 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:04:46,018 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:04:46,114 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:04:46,115 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:04:46,115 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:04:46,115 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883593148] [2019-10-13 18:04:46,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:04:46,118 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:04:46,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:04:46,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:04:46,119 INFO L87 Difference]: Start difference. First operand 7348 states and 9052 transitions. Second operand 3 states. [2019-10-13 18:04:48,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:04:48,702 INFO L93 Difference]: Finished difference Result 16567 states and 20948 transitions. [2019-10-13 18:04:48,704 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:04:48,705 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 303 [2019-10-13 18:04:48,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:04:48,747 INFO L225 Difference]: With dead ends: 16567 [2019-10-13 18:04:48,747 INFO L226 Difference]: Without dead ends: 9225 [2019-10-13 18:04:48,765 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 306 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 18:04:48,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9225 states. [2019-10-13 18:04:48,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9225 to 9224. [2019-10-13 18:04:48,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9224 states. [2019-10-13 18:04:48,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9224 states to 9224 states and 11518 transitions. [2019-10-13 18:04:48,989 INFO L78 Accepts]: Start accepts. Automaton has 9224 states and 11518 transitions. Word has length 303 [2019-10-13 18:04:48,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:04:48,991 INFO L462 AbstractCegarLoop]: Abstraction has 9224 states and 11518 transitions. [2019-10-13 18:04:48,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:04:48,992 INFO L276 IsEmpty]: Start isEmpty. Operand 9224 states and 11518 transitions. [2019-10-13 18:04:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2019-10-13 18:04:49,003 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:04:49,004 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:04:49,218 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:04:49,218 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:04:49,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:04:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1142975225, now seen corresponding path program 1 times [2019-10-13 18:04:49,224 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:04:49,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324787793] [2019-10-13 18:04:49,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:49,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:04:49,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:04:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:49,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:49,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:04:49,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat