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_label55.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:59:56,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:59:56,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:59:56,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:59:56,845 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:59:56,847 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:59:56,849 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:59:56,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:59:56,863 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:59:56,864 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:59:56,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:59:56,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:59:56,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:59:56,871 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:59:56,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:59:56,875 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:59:56,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:59:56,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:59:56,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:59:56,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:59:56,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:59:56,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:59:56,885 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:59:56,886 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:59:56,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:59:56,891 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:59:56,892 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:59:56,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:59:56,893 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:59:56,894 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:59:56,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:59:56,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:59:56,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:59:56,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:59:56,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:59:56,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:59:56,898 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 [2019-10-14 21:59:56,911 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:59:56,911 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:59:56,912 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:59:56,913 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:59:56,913 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:59:56,913 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:59:56,913 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:59:56,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:59:56,914 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:59:56,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:59:56,915 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:59:56,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:59:56,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:59:56,915 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:59:56,916 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:59:56,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:59:56,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:59:56,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:59:56,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:59:56,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:59:56,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:59:56,917 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:59:56,917 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:59:56,917 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:59:57,193 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:59:57,205 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:59:57,208 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:59:57,210 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:59:57,210 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:59:57,211 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-14 21:59:57,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8728359ed/c399891d918545a3a9987ba63214c584/FLAGf88774496 [2019-10-14 21:59:57,855 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:59:57,856 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label55.c [2019-10-14 21:59:57,875 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8728359ed/c399891d918545a3a9987ba63214c584/FLAGf88774496 [2019-10-14 21:59:58,095 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8728359ed/c399891d918545a3a9987ba63214c584 [2019-10-14 21:59:58,106 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:59:58,107 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:59:58,108 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:58,108 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:59:58,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:59:58,112 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:58" (1/1) ... [2019-10-14 21:59:58,115 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15f58af8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:58, skipping insertion in model container [2019-10-14 21:59:58,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:59:58" (1/1) ... [2019-10-14 21:59:58,124 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:59:58,189 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:59:58,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:58,835 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:59:58,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:59:59,006 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:59:59,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59 WrapperNode [2019-10-14 21:59:59,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:59:59,008 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:59:59,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:59:59,009 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:59:59,022 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,065 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,066 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,128 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,141 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,150 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (1/1) ... [2019-10-14 21:59:59,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:59:59,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:59:59,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:59:59,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:59:59,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (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 [2019-10-14 21:59:59,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:59:59,241 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:59:59,241 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:59:59,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:59:59,241 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:59:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:59:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:00:01,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:00:01,090 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:00:01,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:01 BoogieIcfgContainer [2019-10-14 22:00:01,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:00:01,094 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:00:01,094 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:00:01,097 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:00:01,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:59:58" (1/3) ... [2019-10-14 22:00:01,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:01, skipping insertion in model container [2019-10-14 22:00:01,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:59:59" (2/3) ... [2019-10-14 22:00:01,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b09f87e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:01, skipping insertion in model container [2019-10-14 22:00:01,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:01" (3/3) ... [2019-10-14 22:00:01,101 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label55.c [2019-10-14 22:00:01,111 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:00:01,120 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:00:01,131 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:00:01,159 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:00:01,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:00:01,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:00:01,160 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:00:01,160 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:00:01,161 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:00:01,161 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:00:01,161 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:00:01,194 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-14 22:00:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 22:00:01,206 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:01,207 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:01,210 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:01,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:01,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1587257066, now seen corresponding path program 1 times [2019-10-14 22:00:01,225 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:01,225 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835530722] [2019-10-14 22:00:01,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:01,226 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:01,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:01,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:01,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:01,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835530722] [2019-10-14 22:00:01,761 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:01,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:00:01,762 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307890653] [2019-10-14 22:00:01,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:01,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:01,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:01,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:00:01,789 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 5 states. [2019-10-14 22:00:05,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:05,048 INFO L93 Difference]: Finished difference Result 987 states and 1769 transitions. [2019-10-14 22:00:05,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:00:05,049 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-10-14 22:00:05,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:05,077 INFO L225 Difference]: With dead ends: 987 [2019-10-14 22:00:05,077 INFO L226 Difference]: Without dead ends: 626 [2019-10-14 22:00:05,086 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:05,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2019-10-14 22:00:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 426. [2019-10-14 22:00:05,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 426 states. [2019-10-14 22:00:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 611 transitions. [2019-10-14 22:00:05,178 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 611 transitions. Word has length 51 [2019-10-14 22:00:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:05,179 INFO L462 AbstractCegarLoop]: Abstraction has 426 states and 611 transitions. [2019-10-14 22:00:05,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 611 transitions. [2019-10-14 22:00:05,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 22:00:05,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:05,186 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:05,186 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:05,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1592222806, now seen corresponding path program 1 times [2019-10-14 22:00:05,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:05,187 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648750119] [2019-10-14 22:00:05,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:05,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:05,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:05,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:05,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:05,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648750119] [2019-10-14 22:00:05,576 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:05,576 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:00:05,576 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755148429] [2019-10-14 22:00:05,579 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:00:05,579 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:05,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:00:05,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:00:05,580 INFO L87 Difference]: Start difference. First operand 426 states and 611 transitions. Second operand 9 states. [2019-10-14 22:00:08,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:08,481 INFO L93 Difference]: Finished difference Result 1652 states and 2455 transitions. [2019-10-14 22:00:08,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:00:08,482 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 123 [2019-10-14 22:00:08,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:08,490 INFO L225 Difference]: With dead ends: 1652 [2019-10-14 22:00:08,491 INFO L226 Difference]: Without dead ends: 1232 [2019-10-14 22:00:08,493 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:00:08,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2019-10-14 22:00:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 1203. [2019-10-14 22:00:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1203 states. [2019-10-14 22:00:08,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 1684 transitions. [2019-10-14 22:00:08,556 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 1684 transitions. Word has length 123 [2019-10-14 22:00:08,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:08,556 INFO L462 AbstractCegarLoop]: Abstraction has 1203 states and 1684 transitions. [2019-10-14 22:00:08,556 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:00:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 1684 transitions. [2019-10-14 22:00:08,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-14 22:00:08,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:08,560 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:08,560 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:08,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:08,561 INFO L82 PathProgramCache]: Analyzing trace with hash -654834599, now seen corresponding path program 1 times [2019-10-14 22:00:08,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:08,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202014038] [2019-10-14 22:00:08,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:08,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:08,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:08,785 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:08,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202014038] [2019-10-14 22:00:08,786 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997767112] [2019-10-14 22:00:08,786 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 [2019-10-14 22:00:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:08,897 INFO L256 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:00:08,924 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:09,071 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:09,072 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:09,074 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:00:09,074 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248635600] [2019-10-14 22:00:09,076 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:00:09,077 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:09,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:00:09,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:09,085 INFO L87 Difference]: Start difference. First operand 1203 states and 1684 transitions. Second operand 3 states. [2019-10-14 22:00:10,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:10,015 INFO L93 Difference]: Finished difference Result 2796 states and 3920 transitions. [2019-10-14 22:00:10,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:00:10,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 124 [2019-10-14 22:00:10,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:10,030 INFO L225 Difference]: With dead ends: 2796 [2019-10-14 22:00:10,030 INFO L226 Difference]: Without dead ends: 1599 [2019-10-14 22:00:10,033 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:10,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-10-14 22:00:10,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-10-14 22:00:10,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-10-14 22:00:10,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2180 transitions. [2019-10-14 22:00:10,092 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2180 transitions. Word has length 124 [2019-10-14 22:00:10,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:10,092 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2180 transitions. [2019-10-14 22:00:10,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:00:10,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2180 transitions. [2019-10-14 22:00:10,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:00:10,096 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:10,097 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:10,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:10,300 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:10,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:10,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1691608690, now seen corresponding path program 1 times [2019-10-14 22:00:10,302 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:10,302 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012394384] [2019-10-14 22:00:10,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:10,303 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:10,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 43 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:10,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012394384] [2019-10-14 22:00:10,471 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945907771] [2019-10-14 22:00:10,472 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 [2019-10-14 22:00:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:10,566 INFO L256 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:00:10,570 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:10,600 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:10,601 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:10,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:00:10,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337227073] [2019-10-14 22:00:10,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:00:10,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:10,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:00:10,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:10,603 INFO L87 Difference]: Start difference. First operand 1589 states and 2180 transitions. Second operand 3 states. [2019-10-14 22:00:11,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:11,555 INFO L93 Difference]: Finished difference Result 3182 states and 4394 transitions. [2019-10-14 22:00:11,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:00:11,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 125 [2019-10-14 22:00:11,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:11,564 INFO L225 Difference]: With dead ends: 3182 [2019-10-14 22:00:11,564 INFO L226 Difference]: Without dead ends: 1599 [2019-10-14 22:00:11,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:11,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2019-10-14 22:00:11,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1589. [2019-10-14 22:00:11,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1589 states. [2019-10-14 22:00:11,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1589 states to 1589 states and 2140 transitions. [2019-10-14 22:00:11,611 INFO L78 Accepts]: Start accepts. Automaton has 1589 states and 2140 transitions. Word has length 125 [2019-10-14 22:00:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:11,612 INFO L462 AbstractCegarLoop]: Abstraction has 1589 states and 2140 transitions. [2019-10-14 22:00:11,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:00:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1589 states and 2140 transitions. [2019-10-14 22:00:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-10-14 22:00:11,615 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:11,616 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:00:11,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:11,819 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:11,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:11,819 INFO L82 PathProgramCache]: Analyzing trace with hash 649342070, now seen corresponding path program 1 times [2019-10-14 22:00:11,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:11,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349998431] [2019-10-14 22:00:11,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:11,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:11,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,237 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:12,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349998431] [2019-10-14 22:00:12,238 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747574777] [2019-10-14 22:00:12,238 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 [2019-10-14 22:00:12,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:12,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:00:12,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:12,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:00:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:12,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:00:12,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 12 [2019-10-14 22:00:12,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553257440] [2019-10-14 22:00:12,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:12,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:12,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:12,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:00:12,466 INFO L87 Difference]: Start difference. First operand 1589 states and 2140 transitions. Second operand 5 states. [2019-10-14 22:00:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:14,012 INFO L93 Difference]: Finished difference Result 3808 states and 5175 transitions. [2019-10-14 22:00:14,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:00:14,018 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 145 [2019-10-14 22:00:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:14,030 INFO L225 Difference]: With dead ends: 3808 [2019-10-14 22:00:14,031 INFO L226 Difference]: Without dead ends: 2225 [2019-10-14 22:00:14,034 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:00:14,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2019-10-14 22:00:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2201. [2019-10-14 22:00:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2201 states. [2019-10-14 22:00:14,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2201 states to 2201 states and 2858 transitions. [2019-10-14 22:00:14,104 INFO L78 Accepts]: Start accepts. Automaton has 2201 states and 2858 transitions. Word has length 145 [2019-10-14 22:00:14,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:14,109 INFO L462 AbstractCegarLoop]: Abstraction has 2201 states and 2858 transitions. [2019-10-14 22:00:14,109 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:14,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2201 states and 2858 transitions. [2019-10-14 22:00:14,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2019-10-14 22:00:14,114 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:14,114 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:00:14,318 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:00:14,318 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:14,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1626151708, now seen corresponding path program 1 times [2019-10-14 22:00:14,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:14,319 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764984261] [2019-10-14 22:00:14,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:14,319 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:14,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:14,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 87 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:00:14,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764984261] [2019-10-14 22:00:14,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243445506] [2019-10-14 22:00:14,995 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 [2019-10-14 22:00:15,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:15,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 22:00:15,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:00:15,463 WARN L191 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2019-10-14 22:00:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:00:15,579 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:00:15,579 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2019-10-14 22:00:15,579 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820094413] [2019-10-14 22:00:15,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 22:00:15,580 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:15,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 22:00:15,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:00:15,581 INFO L87 Difference]: Start difference. First operand 2201 states and 2858 transitions. Second operand 15 states. [2019-10-14 22:00:22,527 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55