java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:03:17,644 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:03:17,646 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:03:17,659 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:03:17,659 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:03:17,660 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:03:17,662 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:03:17,664 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:03:17,666 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:03:17,666 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:03:17,667 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:03:17,669 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:03:17,669 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:03:17,670 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:03:17,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:03:17,672 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:03:17,673 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:03:17,674 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:03:17,676 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:03:17,678 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:03:17,679 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:03:17,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:03:17,683 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:03:17,684 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:03:17,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:03:17,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:03:17,698 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:03:17,699 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:03:17,701 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:03:17,702 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:03:17,702 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:03:17,703 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:03:17,703 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:03:17,703 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:03:17,707 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:03:17,708 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:03:17,708 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 18:03:17,732 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:03:17,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:03:17,734 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:03:17,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:03:17,735 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:03:17,735 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:03:17,735 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:03:17,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:03:17,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:03:17,736 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:03:17,737 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:03:17,737 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:03:17,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:03:17,737 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:03:17,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:03:17,738 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:03:17,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:03:17,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:03:17,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:03:17,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:03:17,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:03:17,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:03:17,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:03:17,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:03:17,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:03:17,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:03:17,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:03:17,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:03:17,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:03:18,048 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:03:18,061 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:03:18,065 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:03:18,066 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:03:18,066 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:03:18,067 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-13 18:03:18,141 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f0bdf4/e8af82e50e2440e9963673fdc58f8487/FLAGc880a5492 [2019-10-13 18:03:18,745 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:03:18,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-13 18:03:18,763 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f0bdf4/e8af82e50e2440e9963673fdc58f8487/FLAGc880a5492 [2019-10-13 18:03:19,001 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/124f0bdf4/e8af82e50e2440e9963673fdc58f8487 [2019-10-13 18:03:19,011 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:03:19,013 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:03:19,014 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:19,014 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:03:19,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:03:19,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,021 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f8c8d72 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19, skipping insertion in model container [2019-10-13 18:03:19,022 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,028 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:03:19,085 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:03:19,643 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:19,650 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:03:19,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:03:19,861 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:03:19,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19 WrapperNode [2019-10-13 18:03:19,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:03:19,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:03:19,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:03:19,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:03:19,885 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,928 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:19,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:20,017 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:20,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:20,051 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (1/1) ... [2019-10-13 18:03:20,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:03:20,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:03:20,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:03:20,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:03:20,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (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 18:03:20,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:03:20,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:03:20,181 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:03:20,181 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:03:20,182 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:03:20,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:03:20,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:03:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:03:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:03:20,184 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:03:20,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:03:21,743 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:03:21,743 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:03:21,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:21 BoogieIcfgContainer [2019-10-13 18:03:21,745 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:03:21,746 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:03:21,747 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:03:21,750 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:03:21,750 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:03:19" (1/3) ... [2019-10-13 18:03:21,751 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489918da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:21, skipping insertion in model container [2019-10-13 18:03:21,751 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:03:19" (2/3) ... [2019-10-13 18:03:21,752 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@489918da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:03:21, skipping insertion in model container [2019-10-13 18:03:21,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:03:21" (3/3) ... [2019-10-13 18:03:21,754 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label47.c [2019-10-13 18:03:21,764 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:03:21,775 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:03:21,787 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:03:21,815 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:03:21,815 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:03:21,816 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:03:21,816 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:03:21,816 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:03:21,816 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:03:21,816 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:03:21,817 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:03:21,841 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:03:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 18:03:21,849 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:21,850 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:21,852 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:21,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:21,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1824869262, now seen corresponding path program 1 times [2019-10-13 18:03:21,866 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:21,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195989822] [2019-10-13 18:03:21,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:21,867 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:22,258 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 18:03:22,259 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195989822] [2019-10-13 18:03:22,260 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:22,260 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:03:22,261 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865822239] [2019-10-13 18:03:22,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:22,269 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:22,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:22,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:03:22,290 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:03:25,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:25,037 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:03:25,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:03:25,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-13 18:03:25,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:25,074 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:03:25,074 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:03:25,083 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:25,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:03:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:03:25,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:03:25,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:03:25,183 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 39 [2019-10-13 18:03:25,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:25,184 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:03:25,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:25,184 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:03:25,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-13 18:03:25,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:25,191 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:25,191 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:25,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:25,192 INFO L82 PathProgramCache]: Analyzing trace with hash 686981166, now seen corresponding path program 1 times [2019-10-13 18:03:25,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:25,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628507136] [2019-10-13 18:03:25,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:25,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:25,559 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:25,559 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628507136] [2019-10-13 18:03:25,560 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:03:25,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:03:25,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446844229] [2019-10-13 18:03:25,564 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:25,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:25,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:25,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:25,565 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:03:27,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:27,623 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-13 18:03:27,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:03:27,624 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-13 18:03:27,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:27,630 INFO L225 Difference]: With dead ends: 1320 [2019-10-13 18:03:27,630 INFO L226 Difference]: Without dead ends: 768 [2019-10-13 18:03:27,632 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:27,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-13 18:03:27,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-13 18:03:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-13 18:03:27,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-13 18:03:27,670 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 125 [2019-10-13 18:03:27,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:27,671 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-13 18:03:27,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:27,671 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-13 18:03:27,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:03:27,674 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:27,675 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:03:27,675 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:27,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:27,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1152023485, now seen corresponding path program 1 times [2019-10-13 18:03:27,676 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:27,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341186614] [2019-10-13 18:03:27,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,676 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:27,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:27,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341186614] [2019-10-13 18:03:27,856 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494699751] [2019-10-13 18:03:27,856 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 18:03:27,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:27,939 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:27,949 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:03:28,026 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:28,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:28,027 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940658372] [2019-10-13 18:03:28,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:28,028 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:28,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:28,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:28,028 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-13 18:03:28,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:28,946 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-13 18:03:28,946 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:28,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-13 18:03:28,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:28,960 INFO L225 Difference]: With dead ends: 1680 [2019-10-13 18:03:28,960 INFO L226 Difference]: Without dead ends: 1120 [2019-10-13 18:03:28,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-13 18:03:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-13 18:03:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-13 18:03:29,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-13 18:03:29,023 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 134 [2019-10-13 18:03:29,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:29,024 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-13 18:03:29,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:29,024 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-13 18:03:29,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-13 18:03:29,038 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:29,038 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:29,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:29,243 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:29,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:29,244 INFO L82 PathProgramCache]: Analyzing trace with hash 2146210942, now seen corresponding path program 1 times [2019-10-13 18:03:29,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:29,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748094501] [2019-10-13 18:03:29,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:29,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:29,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748094501] [2019-10-13 18:03:29,492 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370301792] [2019-10-13 18:03:29,493 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:03:29,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:29,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:29,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:29,729 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-13 18:03:29,730 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:29,730 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:03:29,731 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107410648] [2019-10-13 18:03:29,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:29,732 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:29,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:29,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:29,733 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-13 18:03:30,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:30,622 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-13 18:03:30,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:30,623 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-10-13 18:03:30,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:30,633 INFO L225 Difference]: With dead ends: 2414 [2019-10-13 18:03:30,634 INFO L226 Difference]: Without dead ends: 1486 [2019-10-13 18:03:30,637 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:30,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-13 18:03:30,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-13 18:03:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-13 18:03:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-13 18:03:30,679 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 237 [2019-10-13 18:03:30,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:30,680 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-13 18:03:30,680 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:30,680 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-13 18:03:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-13 18:03:30,685 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:30,686 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:30,890 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:30,891 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:30,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:30,892 INFO L82 PathProgramCache]: Analyzing trace with hash -799167839, now seen corresponding path program 1 times [2019-10-13 18:03:30,892 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:30,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678540165] [2019-10-13 18:03:30,892 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:30,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:30,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,299 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-13 18:03:31,299 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678540165] [2019-10-13 18:03:31,300 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561528864] [2019-10-13 18:03:31,300 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 18:03:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:31,388 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:31,399 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-13 18:03:31,454 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:31,454 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-13 18:03:31,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917359987] [2019-10-13 18:03:31,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:31,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:31,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:31,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:31,456 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-13 18:03:32,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:32,270 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-13 18:03:32,271 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:32,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2019-10-13 18:03:32,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:32,281 INFO L225 Difference]: With dead ends: 3156 [2019-10-13 18:03:32,282 INFO L226 Difference]: Without dead ends: 1858 [2019-10-13 18:03:32,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:03:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-13 18:03:32,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-13 18:03:32,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-13 18:03:32,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-13 18:03:32,348 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 256 [2019-10-13 18:03:32,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:32,353 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-13 18:03:32,353 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:32,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-13 18:03:32,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-13 18:03:32,359 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:32,360 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:32,565 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:32,566 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:32,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:32,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2008848013, now seen corresponding path program 1 times [2019-10-13 18:03:32,567 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:32,568 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388922753] [2019-10-13 18:03:32,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:32,568 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:32,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:32,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388922753] [2019-10-13 18:03:32,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605317747] [2019-10-13 18:03:32,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:33,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:33,016 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:33,111 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:03:33,274 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:33,274 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-13 18:03:33,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719551339] [2019-10-13 18:03:33,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:33,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:33,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:33,277 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-13 18:03:34,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:34,826 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-13 18:03:34,830 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:34,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2019-10-13 18:03:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:34,843 INFO L225 Difference]: With dead ends: 3930 [2019-10-13 18:03:34,844 INFO L226 Difference]: Without dead ends: 2262 [2019-10-13 18:03:34,849 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-13 18:03:34,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-13 18:03:34,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-13 18:03:34,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-13 18:03:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-13 18:03:34,922 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 262 [2019-10-13 18:03:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:34,922 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-13 18:03:34,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:34,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-13 18:03:34,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-10-13 18:03:34,930 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:34,931 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:35,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:35,143 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:35,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:35,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1769612725, now seen corresponding path program 1 times [2019-10-13 18:03:35,143 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:35,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253446166] [2019-10-13 18:03:35,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:35,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 106 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:36,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253446166] [2019-10-13 18:03:36,674 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659805965] [2019-10-13 18:03:36,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:36,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:36,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:36,847 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:37,063 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 289 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-13 18:03:37,063 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:37,063 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:37,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754862664] [2019-10-13 18:03:37,065 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:37,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:37,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:37,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:37,066 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-13 18:03:39,252 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2019-10-13 18:03:41,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:41,011 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-13 18:03:41,012 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:03:41,012 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 346 [2019-10-13 18:03:41,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:41,024 INFO L225 Difference]: With dead ends: 4460 [2019-10-13 18:03:41,024 INFO L226 Difference]: Without dead ends: 2349 [2019-10-13 18:03:41,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:03:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-13 18:03:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-13 18:03:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-13 18:03:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-13 18:03:41,097 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 346 [2019-10-13 18:03:41,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:41,097 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-13 18:03:41,097 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:41,097 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-13 18:03:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2019-10-13 18:03:41,108 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:41,108 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:41,312 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:41,312 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:41,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:41,313 INFO L82 PathProgramCache]: Analyzing trace with hash -721277978, now seen corresponding path program 1 times [2019-10-13 18:03:41,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:41,313 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809017805] [2019-10-13 18:03:41,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:41,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,230 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 171 proven. 149 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-13 18:03:42,231 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809017805] [2019-10-13 18:03:42,232 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300365302] [2019-10-13 18:03:42,232 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:42,353 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 18:03:42,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:42,403 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-13 18:03:42,490 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-13 18:03:42,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:42,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-13 18:03:42,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910071123] [2019-10-13 18:03:42,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:42,492 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:42,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:42,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:42,493 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-13 18:03:43,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:43,654 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-13 18:03:43,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:43,659 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 371 [2019-10-13 18:03:43,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:43,670 INFO L225 Difference]: With dead ends: 5098 [2019-10-13 18:03:43,671 INFO L226 Difference]: Without dead ends: 2836 [2019-10-13 18:03:43,676 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-13 18:03:43,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-13 18:03:43,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-13 18:03:43,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-13 18:03:43,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-13 18:03:43,747 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 371 [2019-10-13 18:03:43,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:43,748 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-13 18:03:43,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:43,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-13 18:03:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2019-10-13 18:03:43,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:43,760 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:43,973 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:43,973 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:43,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash -358273966, now seen corresponding path program 1 times [2019-10-13 18:03:43,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:43,974 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226232757] [2019-10-13 18:03:43,974 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:43,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:43,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:44,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,740 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 354 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:44,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226232757] [2019-10-13 18:03:44,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880769594] [2019-10-13 18:03:44,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:44,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:44,876 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:45,031 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 645 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-10-13 18:03:45,031 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:45,032 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:45,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325497900] [2019-10-13 18:03:45,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:45,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:45,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:45,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:45,034 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-13 18:03:47,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:47,256 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-13 18:03:47,256 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:03:47,256 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 481 [2019-10-13 18:03:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:47,266 INFO L225 Difference]: With dead ends: 5490 [2019-10-13 18:03:47,267 INFO L226 Difference]: Without dead ends: 2846 [2019-10-13 18:03:47,273 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:47,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-13 18:03:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-13 18:03:47,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-13 18:03:47,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-13 18:03:47,333 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 481 [2019-10-13 18:03:47,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:47,334 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-13 18:03:47,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:47,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-13 18:03:47,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2019-10-13 18:03:47,349 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:47,349 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:47,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:47,561 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:47,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1024360186, now seen corresponding path program 1 times [2019-10-13 18:03:47,562 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:47,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633991348] [2019-10-13 18:03:47,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:47,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:47,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 478 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:03:49,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633991348] [2019-10-13 18:03:49,333 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35521092] [2019-10-13 18:03:49,333 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:49,533 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:49,543 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:49,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:49,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 848 proven. 2 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2019-10-13 18:03:49,874 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:49,874 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:49,874 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994721325] [2019-10-13 18:03:49,875 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:49,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:49,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:49,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:49,876 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-13 18:03:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:52,231 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-13 18:03:52,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:52,231 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 565 [2019-10-13 18:03:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:52,243 INFO L225 Difference]: With dead ends: 5780 [2019-10-13 18:03:52,243 INFO L226 Difference]: Without dead ends: 3085 [2019-10-13 18:03:52,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 584 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:52,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-13 18:03:52,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-13 18:03:52,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-13 18:03:52,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-13 18:03:52,313 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 565 [2019-10-13 18:03:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:52,314 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-13 18:03:52,314 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:52,314 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-13 18:03:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2019-10-13 18:03:52,322 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:52,323 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:52,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:52,528 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:52,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:52,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1305863078, now seen corresponding path program 2 times [2019-10-13 18:03:52,529 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:52,529 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152549003] [2019-10-13 18:03:52,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:52,530 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:52,531 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:53,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 701 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-13 18:03:53,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152549003] [2019-10-13 18:03:53,512 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137680292] [2019-10-13 18:03:53,513 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:53,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:53,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:53,687 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:53,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:53,741 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 900 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2019-10-13 18:03:54,139 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:54,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:54,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150146549] [2019-10-13 18:03:54,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:54,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:54,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:54,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:54,142 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.