java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label28.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:05:24,266 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:05:24,269 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:05:24,288 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:05:24,288 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:05:24,290 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:05:24,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:05:24,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:05:24,300 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:05:24,301 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:05:24,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:05:24,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:05:24,306 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:05:24,307 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:05:24,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:05:24,313 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:05:24,314 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:05:24,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:05:24,319 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:05:24,321 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:05:24,326 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:05:24,328 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:05:24,330 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:05:24,330 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:05:24,336 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:05:24,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:05:24,345 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:05:24,345 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:05:24,346 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:05:24,351 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:05:24,351 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:05:24,352 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:05:24,352 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:05:24,352 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:05:24,354 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:05:24,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:05:24,356 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 18:05:24,377 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:05:24,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:05:24,380 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:05:24,380 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:05:24,381 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:05:24,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:05:24,381 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:05:24,381 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:05:24,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:05:24,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:05:24,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:05:24,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:05:24,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:05:24,384 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:05:24,384 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:05:24,384 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:05:24,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:05:24,385 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:05:24,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:05:24,385 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:05:24,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:05:24,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:05:24,386 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:05:24,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:05:24,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:05:24,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:05:24,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:05:24,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:05:24,387 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:05:24,728 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:05:24,746 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:05:24,751 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:05:24,753 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:05:24,754 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:05:24,755 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-10-13 18:05:24,834 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d60512b/5f97f40d83524024a34416cdd13915f9/FLAG547c439b6 [2019-10-13 18:05:25,560 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:05:25,565 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label28.c [2019-10-13 18:05:25,595 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d60512b/5f97f40d83524024a34416cdd13915f9/FLAG547c439b6 [2019-10-13 18:05:25,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7d60512b/5f97f40d83524024a34416cdd13915f9 [2019-10-13 18:05:25,726 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:05:25,728 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:05:25,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:25,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:05:25,733 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:05:25,734 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:25" (1/1) ... [2019-10-13 18:05:25,737 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@716e1c6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:25, skipping insertion in model container [2019-10-13 18:05:25,738 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:05:25" (1/1) ... [2019-10-13 18:05:25,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:05:25,832 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:05:26,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:26,617 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:05:27,170 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:05:27,190 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:05:27,191 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27 WrapperNode [2019-10-13 18:05:27,191 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:05:27,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:05:27,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:05:27,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:05:27,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,254 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,254 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,348 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (1/1) ... [2019-10-13 18:05:27,379 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:05:27,380 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:05:27,380 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:05:27,380 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:05:27,383 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (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 18:05:27,450 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:05:27,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:05:27,451 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:05:27,451 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:05:27,451 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:05:27,451 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:05:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:05:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:05:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:05:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:05:27,452 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:05:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:05:27,453 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:05:30,101 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:05:30,102 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:05:30,106 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:30 BoogieIcfgContainer [2019-10-13 18:05:30,107 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:05:30,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:05:30,109 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:05:30,112 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:05:30,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:05:25" (1/3) ... [2019-10-13 18:05:30,113 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf0ce50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:30, skipping insertion in model container [2019-10-13 18:05:30,113 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:05:27" (2/3) ... [2019-10-13 18:05:30,114 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bf0ce50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:05:30, skipping insertion in model container [2019-10-13 18:05:30,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:05:30" (3/3) ... [2019-10-13 18:05:30,122 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label28.c [2019-10-13 18:05:30,135 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:05:30,145 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:05:30,157 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:05:30,200 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:05:30,201 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:05:30,201 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:05:30,201 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:05:30,201 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:05:30,201 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:05:30,202 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:05:30,202 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:05:30,227 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-13 18:05:30,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-13 18:05:30,238 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:30,239 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, 1] [2019-10-13 18:05:30,241 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:30,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:30,247 INFO L82 PathProgramCache]: Analyzing trace with hash 259572933, now seen corresponding path program 1 times [2019-10-13 18:05:30,257 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:30,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535454110] [2019-10-13 18:05:30,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:30,258 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:30,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:30,729 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 18:05:30,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535454110] [2019-10-13 18:05:30,731 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:05:30,731 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:05:30,732 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249522054] [2019-10-13 18:05:30,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:30,737 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:30,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:30,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:05:30,754 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-13 18:05:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:36,163 INFO L93 Difference]: Finished difference Result 1515 states and 2848 transitions. [2019-10-13 18:05:36,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:05:36,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2019-10-13 18:05:36,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:36,206 INFO L225 Difference]: With dead ends: 1515 [2019-10-13 18:05:36,206 INFO L226 Difference]: Without dead ends: 1038 [2019-10-13 18:05:36,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:05:36,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-13 18:05:36,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-13 18:05:36,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-13 18:05:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1642 transitions. [2019-10-13 18:05:36,371 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1642 transitions. Word has length 72 [2019-10-13 18:05:36,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:36,372 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1642 transitions. [2019-10-13 18:05:36,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:36,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1642 transitions. [2019-10-13 18:05:36,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-10-13 18:05:36,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:36,386 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:36,386 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:36,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:36,387 INFO L82 PathProgramCache]: Analyzing trace with hash -1696196219, now seen corresponding path program 1 times [2019-10-13 18:05:36,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:36,388 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265441515] [2019-10-13 18:05:36,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:36,388 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:36,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:36,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 130 proven. 70 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:36,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265441515] [2019-10-13 18:05:36,886 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768111856] [2019-10-13 18:05:36,886 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 18:05:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:37,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:37,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 18:05:37,170 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:37,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2019-10-13 18:05:37,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286244800] [2019-10-13 18:05:37,176 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:37,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:37,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:37,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:05:37,178 INFO L87 Difference]: Start difference. First operand 1031 states and 1642 transitions. Second operand 5 states. [2019-10-13 18:05:40,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:40,657 INFO L93 Difference]: Finished difference Result 3131 states and 5064 transitions. [2019-10-13 18:05:40,658 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:40,658 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 254 [2019-10-13 18:05:40,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:40,673 INFO L225 Difference]: With dead ends: 3131 [2019-10-13 18:05:40,673 INFO L226 Difference]: Without dead ends: 2106 [2019-10-13 18:05:40,677 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 257 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2106 states. [2019-10-13 18:05:40,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2106 to 2083. [2019-10-13 18:05:40,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2019-10-13 18:05:40,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3188 transitions. [2019-10-13 18:05:40,755 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3188 transitions. Word has length 254 [2019-10-13 18:05:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:40,755 INFO L462 AbstractCegarLoop]: Abstraction has 2083 states and 3188 transitions. [2019-10-13 18:05:40,756 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:40,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3188 transitions. [2019-10-13 18:05:40,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-13 18:05:40,761 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:40,762 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:05:40,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:40,973 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:40,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1492798540, now seen corresponding path program 1 times [2019-10-13 18:05:40,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:40,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137445331] [2019-10-13 18:05:40,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:40,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:40,976 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 130 proven. 74 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 18:05:41,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137445331] [2019-10-13 18:05:41,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761445288] [2019-10-13 18:05:41,404 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 18:05:41,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:41,499 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:41,507 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-10-13 18:05:41,638 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:41,639 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:41,639 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650101285] [2019-10-13 18:05:41,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:41,641 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:41,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:41,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:41,642 INFO L87 Difference]: Start difference. First operand 2083 states and 3188 transitions. Second operand 5 states. [2019-10-13 18:05:44,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:44,443 INFO L93 Difference]: Finished difference Result 6311 states and 9957 transitions. [2019-10-13 18:05:44,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:05:44,444 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 261 [2019-10-13 18:05:44,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:44,469 INFO L225 Difference]: With dead ends: 6311 [2019-10-13 18:05:44,469 INFO L226 Difference]: Without dead ends: 4234 [2019-10-13 18:05:44,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:05:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4234 states. [2019-10-13 18:05:44,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4234 to 4198. [2019-10-13 18:05:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4198 states. [2019-10-13 18:05:44,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4198 states to 4198 states and 5792 transitions. [2019-10-13 18:05:44,628 INFO L78 Accepts]: Start accepts. Automaton has 4198 states and 5792 transitions. Word has length 261 [2019-10-13 18:05:44,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:44,628 INFO L462 AbstractCegarLoop]: Abstraction has 4198 states and 5792 transitions. [2019-10-13 18:05:44,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:44,629 INFO L276 IsEmpty]: Start isEmpty. Operand 4198 states and 5792 transitions. [2019-10-13 18:05:44,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-13 18:05:44,637 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:44,637 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:44,849 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:44,850 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:44,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:44,851 INFO L82 PathProgramCache]: Analyzing trace with hash -1800771228, now seen corresponding path program 1 times [2019-10-13 18:05:44,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:44,852 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120911787] [2019-10-13 18:05:44,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:44,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:44,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:44,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,388 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 215 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 18:05:45,389 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120911787] [2019-10-13 18:05:45,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816284585] [2019-10-13 18:05:45,390 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 18:05:45,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:45,522 INFO L256 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:45,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 219 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:05:45,672 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:45,673 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 18:05:45,673 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903698879] [2019-10-13 18:05:45,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:05:45,675 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:05:45,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:45,676 INFO L87 Difference]: Start difference. First operand 4198 states and 5792 transitions. Second operand 12 states. [2019-10-13 18:05:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:52,843 INFO L93 Difference]: Finished difference Result 13272 states and 19295 transitions. [2019-10-13 18:05:52,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 18:05:52,844 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 301 [2019-10-13 18:05:52,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:52,884 INFO L225 Difference]: With dead ends: 13272 [2019-10-13 18:05:52,885 INFO L226 Difference]: Without dead ends: 7642 [2019-10-13 18:05:52,901 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 309 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=247, Invalid=875, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:05:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2019-10-13 18:05:53,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 6236. [2019-10-13 18:05:53,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6236 states. [2019-10-13 18:05:53,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6236 states to 6236 states and 7162 transitions. [2019-10-13 18:05:53,075 INFO L78 Accepts]: Start accepts. Automaton has 6236 states and 7162 transitions. Word has length 301 [2019-10-13 18:05:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:53,076 INFO L462 AbstractCegarLoop]: Abstraction has 6236 states and 7162 transitions. [2019-10-13 18:05:53,077 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:05:53,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6236 states and 7162 transitions. [2019-10-13 18:05:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2019-10-13 18:05:53,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:53,094 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, 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, 3, 3, 3, 3, 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 18:05:53,298 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:53,299 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:53,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1218994707, now seen corresponding path program 1 times [2019-10-13 18:05:53,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:53,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721507439] [2019-10-13 18:05:53,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:53,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:53,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:53,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:53,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 260 proven. 345 refuted. 0 times theorem prover too weak. 350 trivial. 0 not checked. [2019-10-13 18:05:54,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721507439] [2019-10-13 18:05:54,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487676192] [2019-10-13 18:05:54,216 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 18:05:54,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:54,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:05:54,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:54,605 INFO L134 CoverageAnalysis]: Checked inductivity of 955 backedges. 422 proven. 0 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-10-13 18:05:54,605 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:05:54,605 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 18:05:54,606 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343830038] [2019-10-13 18:05:54,607 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:05:54,607 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:54,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:05:54,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:54,608 INFO L87 Difference]: Start difference. First operand 6236 states and 7162 transitions. Second operand 5 states. [2019-10-13 18:05:56,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:05:56,178 INFO L93 Difference]: Finished difference Result 13846 states and 15934 transitions. [2019-10-13 18:05:56,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 18:05:56,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 570 [2019-10-13 18:05:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:05:56,211 INFO L225 Difference]: With dead ends: 13846 [2019-10-13 18:05:56,211 INFO L226 Difference]: Without dead ends: 7616 [2019-10-13 18:05:56,227 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 574 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:05:56,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7616 states. [2019-10-13 18:05:56,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7616 to 7598. [2019-10-13 18:05:56,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7598 states. [2019-10-13 18:05:56,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7598 states to 7598 states and 8435 transitions. [2019-10-13 18:05:56,414 INFO L78 Accepts]: Start accepts. Automaton has 7598 states and 8435 transitions. Word has length 570 [2019-10-13 18:05:56,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:05:56,424 INFO L462 AbstractCegarLoop]: Abstraction has 7598 states and 8435 transitions. [2019-10-13 18:05:56,424 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:05:56,425 INFO L276 IsEmpty]: Start isEmpty. Operand 7598 states and 8435 transitions. [2019-10-13 18:05:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 685 [2019-10-13 18:05:56,459 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:05:56,460 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:56,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:05:56,664 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:05:56,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:05:56,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2045280105, now seen corresponding path program 1 times [2019-10-13 18:05:56,664 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:05:56,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531520228] [2019-10-13 18:05:56,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:56,665 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:05:56,666 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:05:56,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:56,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,730 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 380 proven. 221 refuted. 0 times theorem prover too weak. 357 trivial. 0 not checked. [2019-10-13 18:05:57,730 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531520228] [2019-10-13 18:05:57,731 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888854292] [2019-10-13 18:05:57,731 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 18:05:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:05:57,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 951 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:05:57,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:05:58,329 INFO L134 CoverageAnalysis]: Checked inductivity of 958 backedges. 714 proven. 2 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2019-10-13 18:05:58,330 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:05:58,331 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:05:58,331 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102365339] [2019-10-13 18:05:58,335 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:05:58,336 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:05:58,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:05:58,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:05:58,337 INFO L87 Difference]: Start difference. First operand 7598 states and 8435 transitions. Second operand 11 states.