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/Problem10_label24.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:57:58,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:57:58,369 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:57:58,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:57:58,391 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:57:58,394 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:57:58,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:57:58,399 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:57:58,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:57:58,405 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:57:58,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:57:58,409 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:57:58,410 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:57:58,413 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:57:58,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:57:58,417 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:57:58,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:57:58,423 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:57:58,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:57:58,429 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:57:58,430 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:57:58,431 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:57:58,432 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:57:58,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:57:58,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:57:58,445 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:57:58,446 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:57:58,448 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:57:58,449 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:57:58,451 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:57:58,451 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:57:58,455 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:57:58,455 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:57:58,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:57:58,458 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:57:58,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:57:58,460 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 17:57:58,484 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:57:58,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:57:58,487 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:57:58,487 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:57:58,487 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:57:58,488 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:57:58,488 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:57:58,488 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:57:58,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:57:58,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:57:58,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:57:58,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:57:58,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:57:58,491 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:57:58,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:57:58,491 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:57:58,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:57:58,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:57:58,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:57:58,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:57:58,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:57:58,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:57:58,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:57:58,493 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:57:58,493 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:57:58,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:57:58,494 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:57:58,494 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:57:58,494 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:57:58,802 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:57:58,826 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:57:58,830 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:57:58,831 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:57:58,832 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:57:58,832 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-13 17:57:58,905 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992765844/d13db624d114478086fe4ff0e2f7fbb1/FLAG8748e538b [2019-10-13 17:57:59,500 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:57:59,506 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label24.c [2019-10-13 17:57:59,527 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992765844/d13db624d114478086fe4ff0e2f7fbb1/FLAG8748e538b [2019-10-13 17:57:59,718 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/992765844/d13db624d114478086fe4ff0e2f7fbb1 [2019-10-13 17:57:59,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:57:59,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:57:59,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:57:59,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:57:59,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:57:59,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:59" (1/1) ... [2019-10-13 17:57:59,738 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73ef49b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:57:59, skipping insertion in model container [2019-10-13 17:57:59,739 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:57:59" (1/1) ... [2019-10-13 17:57:59,746 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:57:59,802 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:58:00,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:00,236 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:58:00,430 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:58:00,447 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:58:00,447 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00 WrapperNode [2019-10-13 17:58:00,448 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:58:00,448 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:58:00,449 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:58:00,449 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:58:00,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,482 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,482 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,528 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,539 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (1/1) ... [2019-10-13 17:58:00,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:58:00,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:58:00,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:58:00,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:58:00,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (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 17:58:00,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:58:00,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:58:00,630 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:58:00,630 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:58:00,630 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:58:00,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:58:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:58:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:58:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:58:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:58:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:58:01,911 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:58:01,912 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:58:01,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:01 BoogieIcfgContainer [2019-10-13 17:58:01,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:58:01,915 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:58:01,915 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:58:01,918 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:58:01,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:57:59" (1/3) ... [2019-10-13 17:58:01,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb906a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:01, skipping insertion in model container [2019-10-13 17:58:01,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:58:00" (2/3) ... [2019-10-13 17:58:01,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eb906a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:58:01, skipping insertion in model container [2019-10-13 17:58:01,921 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:58:01" (3/3) ... [2019-10-13 17:58:01,923 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label24.c [2019-10-13 17:58:01,933 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:58:01,942 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:58:01,955 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:58:01,984 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:58:01,984 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:58:01,984 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:58:01,985 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:58:01,987 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:58:01,987 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:58:01,988 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:58:01,988 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:58:02,020 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-13 17:58:02,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:58:02,029 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:02,030 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] [2019-10-13 17:58:02,032 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:02,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:02,038 INFO L82 PathProgramCache]: Analyzing trace with hash 894573055, now seen corresponding path program 1 times [2019-10-13 17:58:02,048 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:02,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945603515] [2019-10-13 17:58:02,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:02,049 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:02,049 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:02,395 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 17:58:02,396 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945603515] [2019-10-13 17:58:02,398 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:02,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:58:02,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396511486] [2019-10-13 17:58:02,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:02,403 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:02,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:58:02,421 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-13 17:58:04,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:04,694 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-13 17:58:04,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:04,696 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 17:58:04,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:04,713 INFO L225 Difference]: With dead ends: 730 [2019-10-13 17:58:04,713 INFO L226 Difference]: Without dead ends: 447 [2019-10-13 17:58:04,721 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:04,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-13 17:58:04,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-13 17:58:04,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-13 17:58:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2019-10-13 17:58:04,806 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 20 [2019-10-13 17:58:04,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:04,806 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2019-10-13 17:58:04,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:04,807 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2019-10-13 17:58:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 17:58:04,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:04,812 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:58:04,812 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:04,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:04,813 INFO L82 PathProgramCache]: Analyzing trace with hash 712402589, now seen corresponding path program 1 times [2019-10-13 17:58:04,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:04,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755155789] [2019-10-13 17:58:04,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:04,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:04,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:04,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:04,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,142 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 12 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:05,143 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755155789] [2019-10-13 17:58:05,144 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586836904] [2019-10-13 17:58:05,145 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 17:58:05,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:05,226 INFO L256 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:05,235 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:05,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:05,298 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:05,298 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:58:05,298 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622953264] [2019-10-13 17:58:05,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:58:05,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:05,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:58:05,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:05,302 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 3 states. [2019-10-13 17:58:05,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:05,970 INFO L93 Difference]: Finished difference Result 880 states and 1198 transitions. [2019-10-13 17:58:05,970 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:58:05,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 99 [2019-10-13 17:58:05,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:05,979 INFO L225 Difference]: With dead ends: 880 [2019-10-13 17:58:05,979 INFO L226 Difference]: Without dead ends: 878 [2019-10-13 17:58:05,981 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:58:05,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 878 states. [2019-10-13 17:58:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 878 to 735. [2019-10-13 17:58:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2019-10-13 17:58:06,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1029 transitions. [2019-10-13 17:58:06,028 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1029 transitions. Word has length 99 [2019-10-13 17:58:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:06,029 INFO L462 AbstractCegarLoop]: Abstraction has 735 states and 1029 transitions. [2019-10-13 17:58:06,029 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:58:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1029 transitions. [2019-10-13 17:58:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 17:58:06,035 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:06,036 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 17:58:06,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:06,239 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1290039418, now seen corresponding path program 1 times [2019-10-13 17:58:06,241 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:06,241 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957949382] [2019-10-13 17:58:06,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:06,241 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:06,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:06,729 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957949382] [2019-10-13 17:58:06,729 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:58:06,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:58:06,730 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321883857] [2019-10-13 17:58:06,732 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:58:06,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:06,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:58:06,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:58:06,741 INFO L87 Difference]: Start difference. First operand 735 states and 1029 transitions. Second operand 9 states. [2019-10-13 17:58:08,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:08,232 INFO L93 Difference]: Finished difference Result 1790 states and 2576 transitions. [2019-10-13 17:58:08,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:58:08,233 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 142 [2019-10-13 17:58:08,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:08,240 INFO L225 Difference]: With dead ends: 1790 [2019-10-13 17:58:08,241 INFO L226 Difference]: Without dead ends: 1061 [2019-10-13 17:58:08,243 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:58:08,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2019-10-13 17:58:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 1035. [2019-10-13 17:58:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1035 states. [2019-10-13 17:58:08,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1359 transitions. [2019-10-13 17:58:08,287 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1359 transitions. Word has length 142 [2019-10-13 17:58:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:08,288 INFO L462 AbstractCegarLoop]: Abstraction has 1035 states and 1359 transitions. [2019-10-13 17:58:08,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:58:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1359 transitions. [2019-10-13 17:58:08,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-10-13 17:58:08,294 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:08,294 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 17:58:08,295 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:08,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:08,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1389117779, now seen corresponding path program 1 times [2019-10-13 17:58:08,297 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:08,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106932404] [2019-10-13 17:58:08,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:08,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:08,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:08,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,737 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 93 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:08,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106932404] [2019-10-13 17:58:08,738 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627608462] [2019-10-13 17:58:08,738 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 17:58:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:08,838 INFO L256 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:08,857 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 94 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:08,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:08,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:58:08,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503612546] [2019-10-13 17:58:08,965 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:58:08,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:08,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:58:08,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:08,966 INFO L87 Difference]: Start difference. First operand 1035 states and 1359 transitions. Second operand 11 states. [2019-10-13 17:58:12,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:12,147 INFO L93 Difference]: Finished difference Result 2601 states and 3691 transitions. [2019-10-13 17:58:12,148 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:58:12,148 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 172 [2019-10-13 17:58:12,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:12,161 INFO L225 Difference]: With dead ends: 2601 [2019-10-13 17:58:12,161 INFO L226 Difference]: Without dead ends: 1572 [2019-10-13 17:58:12,165 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=356, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:58:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2019-10-13 17:58:12,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1240. [2019-10-13 17:58:12,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1240 states. [2019-10-13 17:58:12,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1602 transitions. [2019-10-13 17:58:12,244 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1602 transitions. Word has length 172 [2019-10-13 17:58:12,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:12,245 INFO L462 AbstractCegarLoop]: Abstraction has 1240 states and 1602 transitions. [2019-10-13 17:58:12,245 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:58:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1602 transitions. [2019-10-13 17:58:12,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-10-13 17:58:12,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:12,252 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:12,457 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:12,458 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:12,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:12,458 INFO L82 PathProgramCache]: Analyzing trace with hash 647504076, now seen corresponding path program 1 times [2019-10-13 17:58:12,459 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:12,459 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376724247] [2019-10-13 17:58:12,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:12,460 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:12,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 100 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:12,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376724247] [2019-10-13 17:58:12,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979479447] [2019-10-13 17:58:12,712 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 17:58:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:12,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:12,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:12,864 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:58:12,865 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:12,865 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:58:12,865 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143218251] [2019-10-13 17:58:12,866 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:58:12,866 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:58:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:58:12,867 INFO L87 Difference]: Start difference. First operand 1240 states and 1602 transitions. Second operand 11 states. [2019-10-13 17:58:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:15,052 INFO L93 Difference]: Finished difference Result 2466 states and 3171 transitions. [2019-10-13 17:58:15,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:58:15,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 179 [2019-10-13 17:58:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:15,059 INFO L225 Difference]: With dead ends: 2466 [2019-10-13 17:58:15,059 INFO L226 Difference]: Without dead ends: 1232 [2019-10-13 17:58:15,064 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:58:15,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-13 17:58:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1208. [2019-10-13 17:58:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1208 states. [2019-10-13 17:58:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1475 transitions. [2019-10-13 17:58:15,095 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1475 transitions. Word has length 179 [2019-10-13 17:58:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:15,096 INFO L462 AbstractCegarLoop]: Abstraction has 1208 states and 1475 transitions. [2019-10-13 17:58:15,096 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:58:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1475 transitions. [2019-10-13 17:58:15,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-13 17:58:15,099 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:15,100 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:15,304 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:15,304 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:15,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:15,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1377962712, now seen corresponding path program 1 times [2019-10-13 17:58:15,306 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:15,306 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065375457] [2019-10-13 17:58:15,306 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:15,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:15,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:15,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 105 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:58:15,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065375457] [2019-10-13 17:58:15,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494133601] [2019-10-13 17:58:15,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:58:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:15,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:58:15,695 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 94 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:58:15,790 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:58:15,790 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-13 17:58:15,790 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349869342] [2019-10-13 17:58:15,791 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:58:15,791 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:15,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:58:15,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:58:15,792 INFO L87 Difference]: Start difference. First operand 1208 states and 1475 transitions. Second operand 5 states. [2019-10-13 17:58:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:16,919 INFO L93 Difference]: Finished difference Result 2583 states and 3144 transitions. [2019-10-13 17:58:16,920 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:58:16,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-13 17:58:16,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:16,927 INFO L225 Difference]: With dead ends: 2583 [2019-10-13 17:58:16,927 INFO L226 Difference]: Without dead ends: 1381 [2019-10-13 17:58:16,931 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:58:16,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1381 states. [2019-10-13 17:58:16,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1381 to 1355. [2019-10-13 17:58:16,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1355 states. [2019-10-13 17:58:16,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 1633 transitions. [2019-10-13 17:58:16,968 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 1633 transitions. Word has length 189 [2019-10-13 17:58:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:16,968 INFO L462 AbstractCegarLoop]: Abstraction has 1355 states and 1633 transitions. [2019-10-13 17:58:16,968 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:58:16,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 1633 transitions. [2019-10-13 17:58:16,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2019-10-13 17:58:16,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:16,974 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:58:17,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:17,179 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:17,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:17,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1807357958, now seen corresponding path program 1 times [2019-10-13 17:58:17,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:17,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745887325] [2019-10-13 17:58:17,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:17,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,538 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 116 proven. 84 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-10-13 17:58:17,538 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745887325] [2019-10-13 17:58:17,539 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32945834] [2019-10-13 17:58:17,539 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 17:58:17,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:17,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:58:17,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 263 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:58:17,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:58:17,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 13 [2019-10-13 17:58:17,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779416675] [2019-10-13 17:58:17,763 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:58:17,763 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:58:17,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:58:17,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:58:17,763 INFO L87 Difference]: Start difference. First operand 1355 states and 1633 transitions. Second operand 13 states. [2019-10-13 17:58:21,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:58:21,376 INFO L93 Difference]: Finished difference Result 4160 states and 5073 transitions. [2019-10-13 17:58:21,376 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:58:21,377 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 268 [2019-10-13 17:58:21,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:58:21,383 INFO L225 Difference]: With dead ends: 4160 [2019-10-13 17:58:21,383 INFO L226 Difference]: Without dead ends: 1780 [2019-10-13 17:58:21,388 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:58:21,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1780 states. [2019-10-13 17:58:21,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1780 to 1343. [2019-10-13 17:58:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1343 states. [2019-10-13 17:58:21,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1343 states to 1343 states and 1491 transitions. [2019-10-13 17:58:21,429 INFO L78 Accepts]: Start accepts. Automaton has 1343 states and 1491 transitions. Word has length 268 [2019-10-13 17:58:21,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:58:21,429 INFO L462 AbstractCegarLoop]: Abstraction has 1343 states and 1491 transitions. [2019-10-13 17:58:21,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:58:21,430 INFO L276 IsEmpty]: Start isEmpty. Operand 1343 states and 1491 transitions. [2019-10-13 17:58:21,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2019-10-13 17:58:21,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:58:21,436 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:58:21,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:21,647 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:58:21,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:58:21,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1479931902, now seen corresponding path program 1 times [2019-10-13 17:58:21,647 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:58:21,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441477290] [2019-10-13 17:58:21,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:21,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:58:21,648 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:58:21,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,332 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 124 proven. 162 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:58:22,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441477290] [2019-10-13 17:58:22,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992717994] [2019-10-13 17:58:22,336 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:58:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:58:22,433 INFO L256 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 17:58:22,438 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:58:22,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,489 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:58:22,490 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms