java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:00:11,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:00:11,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:00:11,680 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:00:11,680 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:00:11,681 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:00:11,683 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:00:11,685 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:00:11,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:00:11,688 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:00:11,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:00:11,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:00:11,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:00:11,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:00:11,692 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:00:11,694 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:00:11,695 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:00:11,696 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:00:11,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:00:11,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:00:11,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:00:11,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:00:11,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:00:11,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:00:11,708 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:00:11,711 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:00:11,712 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:00:11,713 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:00:11,714 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:00:11,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:00:11,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:00:11,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:00:11,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:00:11,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:00:11,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:00:11,718 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:00:11,719 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 18:00:11,743 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:00:11,744 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:00:11,746 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:00:11,747 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:00:11,747 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:00:11,747 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:00:11,747 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:00:11,748 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:00:11,748 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:00:11,748 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:00:11,749 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:00:11,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:00:11,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:00:11,750 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:00:11,751 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:00:11,751 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:00:11,751 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:00:11,751 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:00:11,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:00:11,752 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:00:11,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:00:11,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:11,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:00:11,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:00:11,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:00:11,754 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:00:11,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:00:11,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:00:11,754 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:00:12,049 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:00:12,063 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:00:12,067 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:00:12,069 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:00:12,069 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:00:12,070 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-13 18:00:12,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bda8a334e/c8ee3bc9c6684f80a31173b109a4f297/FLAG8fd03fcd3 [2019-10-13 18:00:12,749 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:00:12,750 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label29.c [2019-10-13 18:00:12,767 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bda8a334e/c8ee3bc9c6684f80a31173b109a4f297/FLAG8fd03fcd3 [2019-10-13 18:00:12,939 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bda8a334e/c8ee3bc9c6684f80a31173b109a4f297 [2019-10-13 18:00:12,948 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:00:12,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:00:12,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:12,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:00:12,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:00:12,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:12" (1/1) ... [2019-10-13 18:00:12,958 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@77a1e17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:12, skipping insertion in model container [2019-10-13 18:00:12,958 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:00:12" (1/1) ... [2019-10-13 18:00:12,966 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:00:13,033 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:00:13,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:13,766 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:00:13,974 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:00:14,000 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:00:14,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14 WrapperNode [2019-10-13 18:00:14,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:00:14,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:00:14,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:00:14,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:00:14,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,066 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,160 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,177 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... [2019-10-13 18:00:14,191 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:00:14,192 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:00:14,192 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:00:14,192 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:00:14,193 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:00:14,257 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:00:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:00:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:00:14,258 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:00:14,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:00:14,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:00:16,390 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:00:16,390 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:00:16,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:16 BoogieIcfgContainer [2019-10-13 18:00:16,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:00:16,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:00:16,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:00:16,400 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:00:16,401 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:00:12" (1/3) ... [2019-10-13 18:00:16,402 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e2a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:16, skipping insertion in model container [2019-10-13 18:00:16,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:00:14" (2/3) ... [2019-10-13 18:00:16,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704e2a06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:00:16, skipping insertion in model container [2019-10-13 18:00:16,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:00:16" (3/3) ... [2019-10-13 18:00:16,420 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label29.c [2019-10-13 18:00:16,436 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:00:16,448 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:00:16,460 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:00:16,506 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:00:16,506 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:00:16,506 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:00:16,506 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:00:16,507 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:00:16,508 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:00:16,508 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:00:16,508 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:00:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-13 18:00:16,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 18:00:16,558 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:16,560 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] [2019-10-13 18:00:16,561 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:16,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2007465363, now seen corresponding path program 1 times [2019-10-13 18:00:16,577 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:16,578 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680453427] [2019-10-13 18:00:16,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:16,578 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:16,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:16,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:16,974 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 18:00:16,975 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680453427] [2019-10-13 18:00:16,976 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:16,976 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:00:16,976 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457726903] [2019-10-13 18:00:16,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:16,982 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:16,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:16,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:17,000 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-13 18:00:19,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:19,474 INFO L93 Difference]: Finished difference Result 793 states and 1394 transitions. [2019-10-13 18:00:19,475 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:00:19,476 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2019-10-13 18:00:19,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:19,497 INFO L225 Difference]: With dead ends: 793 [2019-10-13 18:00:19,497 INFO L226 Difference]: Without dead ends: 437 [2019-10-13 18:00:19,505 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:19,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-13 18:00:19,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 422. [2019-10-13 18:00:19,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 422 states. [2019-10-13 18:00:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 673 transitions. [2019-10-13 18:00:19,617 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 673 transitions. Word has length 26 [2019-10-13 18:00:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:19,617 INFO L462 AbstractCegarLoop]: Abstraction has 422 states and 673 transitions. [2019-10-13 18:00:19,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:19,619 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 673 transitions. [2019-10-13 18:00:19,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 18:00:19,631 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:19,632 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:00:19,633 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:19,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:19,634 INFO L82 PathProgramCache]: Analyzing trace with hash -954827699, now seen corresponding path program 1 times [2019-10-13 18:00:19,635 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:19,635 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564364899] [2019-10-13 18:00:19,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:19,635 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:19,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:19,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:19,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564364899] [2019-10-13 18:00:19,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:19,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:00:19,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555449396] [2019-10-13 18:00:19,945 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:00:19,945 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:19,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:00:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:19,946 INFO L87 Difference]: Start difference. First operand 422 states and 673 transitions. Second operand 8 states. [2019-10-13 18:00:22,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:22,409 INFO L93 Difference]: Finished difference Result 1269 states and 2061 transitions. [2019-10-13 18:00:22,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:22,411 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 95 [2019-10-13 18:00:22,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:22,418 INFO L225 Difference]: With dead ends: 1269 [2019-10-13 18:00:22,418 INFO L226 Difference]: Without dead ends: 853 [2019-10-13 18:00:22,421 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:00:22,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2019-10-13 18:00:22,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 825. [2019-10-13 18:00:22,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 825 states. [2019-10-13 18:00:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1181 transitions. [2019-10-13 18:00:22,470 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1181 transitions. Word has length 95 [2019-10-13 18:00:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:22,471 INFO L462 AbstractCegarLoop]: Abstraction has 825 states and 1181 transitions. [2019-10-13 18:00:22,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:00:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1181 transitions. [2019-10-13 18:00:22,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 18:00:22,474 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:22,474 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:00:22,475 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:22,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:22,476 INFO L82 PathProgramCache]: Analyzing trace with hash -1471750030, now seen corresponding path program 1 times [2019-10-13 18:00:22,476 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:22,476 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524392867] [2019-10-13 18:00:22,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,477 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:22,477 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:22,686 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524392867] [2019-10-13 18:00:22,686 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:22,687 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:00:22,687 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542915663] [2019-10-13 18:00:22,687 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:00:22,688 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:22,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:00:22,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:00:22,688 INFO L87 Difference]: Start difference. First operand 825 states and 1181 transitions. Second operand 9 states. [2019-10-13 18:00:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:25,913 INFO L93 Difference]: Finished difference Result 2481 states and 3694 transitions. [2019-10-13 18:00:25,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 18:00:25,915 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2019-10-13 18:00:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:25,936 INFO L225 Difference]: With dead ends: 2481 [2019-10-13 18:00:25,936 INFO L226 Difference]: Without dead ends: 1662 [2019-10-13 18:00:25,940 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:00:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-13 18:00:26,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1624. [2019-10-13 18:00:26,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1624 states. [2019-10-13 18:00:26,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1624 states to 1624 states and 2234 transitions. [2019-10-13 18:00:26,022 INFO L78 Accepts]: Start accepts. Automaton has 1624 states and 2234 transitions. Word has length 98 [2019-10-13 18:00:26,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:26,023 INFO L462 AbstractCegarLoop]: Abstraction has 1624 states and 2234 transitions. [2019-10-13 18:00:26,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:00:26,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1624 states and 2234 transitions. [2019-10-13 18:00:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-10-13 18:00:26,032 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:26,033 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:26,033 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash 698002821, now seen corresponding path program 1 times [2019-10-13 18:00:26,034 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:26,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585577686] [2019-10-13 18:00:26,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:26,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:26,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:26,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,383 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:26,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585577686] [2019-10-13 18:00:26,384 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367214742] [2019-10-13 18:00:26,384 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 18:00:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:26,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:00:26,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:26,588 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:26,644 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:00:26,644 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-10-13 18:00:26,645 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64659094] [2019-10-13 18:00:26,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:26,647 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:26,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:00:26,648 INFO L87 Difference]: Start difference. First operand 1624 states and 2234 transitions. Second operand 5 states. [2019-10-13 18:00:28,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:28,509 INFO L93 Difference]: Finished difference Result 3872 states and 5340 transitions. [2019-10-13 18:00:28,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:00:28,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2019-10-13 18:00:28,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:28,523 INFO L225 Difference]: With dead ends: 3872 [2019-10-13 18:00:28,523 INFO L226 Difference]: Without dead ends: 2254 [2019-10-13 18:00:28,528 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:00:28,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2019-10-13 18:00:28,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2212. [2019-10-13 18:00:28,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-13 18:00:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 2893 transitions. [2019-10-13 18:00:28,595 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 2893 transitions. Word has length 99 [2019-10-13 18:00:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:28,596 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 2893 transitions. [2019-10-13 18:00:28,596 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 2893 transitions. [2019-10-13 18:00:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-13 18:00:28,598 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:28,598 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-13 18:00:28,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:28,806 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:28,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:28,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1349266370, now seen corresponding path program 1 times [2019-10-13 18:00:28,808 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:28,808 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344057102] [2019-10-13 18:00:28,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,809 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:28,810 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:28,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:29,103 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:00:29,104 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344057102] [2019-10-13 18:00:29,105 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:00:29,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 18:00:29,105 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050759362] [2019-10-13 18:00:29,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:00:29,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:29,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:00:29,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:00:29,107 INFO L87 Difference]: Start difference. First operand 2212 states and 2893 transitions. Second operand 5 states. [2019-10-13 18:00:31,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:31,055 INFO L93 Difference]: Finished difference Result 5570 states and 7633 transitions. [2019-10-13 18:00:31,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:00:31,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 157 [2019-10-13 18:00:31,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:31,075 INFO L225 Difference]: With dead ends: 5570 [2019-10-13 18:00:31,076 INFO L226 Difference]: Without dead ends: 3552 [2019-10-13 18:00:31,084 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:00:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3552 states. [2019-10-13 18:00:31,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3552 to 3358. [2019-10-13 18:00:31,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3358 states. [2019-10-13 18:00:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3358 states to 3358 states and 4288 transitions. [2019-10-13 18:00:31,187 INFO L78 Accepts]: Start accepts. Automaton has 3358 states and 4288 transitions. Word has length 157 [2019-10-13 18:00:31,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:31,188 INFO L462 AbstractCegarLoop]: Abstraction has 3358 states and 4288 transitions. [2019-10-13 18:00:31,188 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:00:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3358 states and 4288 transitions. [2019-10-13 18:00:31,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-13 18:00:31,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:31,191 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:00:31,192 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:31,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:31,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1834742215, now seen corresponding path program 1 times [2019-10-13 18:00:31,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:31,193 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539280051] [2019-10-13 18:00:31,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:31,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:31,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:31,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:00:31,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539280051] [2019-10-13 18:00:31,577 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126537346] [2019-10-13 18:00:31,580 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 18:00:31,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:31,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:00:31,669 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:00:31,754 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:00:31,755 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:00:31,764 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134702811] [2019-10-13 18:00:31,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:00:31,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:00:31,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:00:31,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:00:31,767 INFO L87 Difference]: Start difference. First operand 3358 states and 4288 transitions. Second operand 8 states. [2019-10-13 18:00:34,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:00:34,737 INFO L93 Difference]: Finished difference Result 8555 states and 11216 transitions. [2019-10-13 18:00:34,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:00:34,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 173 [2019-10-13 18:00:34,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:00:34,768 INFO L225 Difference]: With dead ends: 8555 [2019-10-13 18:00:34,768 INFO L226 Difference]: Without dead ends: 5391 [2019-10-13 18:00:34,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:00:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5391 states. [2019-10-13 18:00:34,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5391 to 4961. [2019-10-13 18:00:34,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4961 states. [2019-10-13 18:00:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 6426 transitions. [2019-10-13 18:00:34,913 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 6426 transitions. Word has length 173 [2019-10-13 18:00:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:00:34,914 INFO L462 AbstractCegarLoop]: Abstraction has 4961 states and 6426 transitions. [2019-10-13 18:00:34,914 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:00:34,914 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 6426 transitions. [2019-10-13 18:00:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2019-10-13 18:00:34,917 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:00:34,918 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:00:35,121 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:00:35,124 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:00:35,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:00:35,125 INFO L82 PathProgramCache]: Analyzing trace with hash 798225516, now seen corresponding path program 1 times [2019-10-13 18:00:35,125 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:00:35,125 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699069227] [2019-10-13 18:00:35,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:35,125 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:00:35,126 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:00:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:35,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:35,492 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 91 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:00:35,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699069227] [2019-10-13 18:00:35,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971498385] [2019-10-13 18:00:35,493 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 18:00:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:00:35,624 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 18:00:35,631 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:00:35,740 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,744 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:35,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:35,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:35,767 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:35,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,771 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,774 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,775 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,777 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,778 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:00:35,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,794 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,796 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,798 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,800 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,801 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,802 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,803 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,808 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,811 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,812 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,813 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,817 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:00:35,818 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms