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/Problem15_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:16,003 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:16,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:16,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:16,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:16,023 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:16,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:16,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:16,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:16,028 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:16,029 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:16,031 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:16,031 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:16,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:16,033 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:16,034 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:16,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:16,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:16,038 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:16,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:16,046 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:16,047 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:16,048 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:16,049 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:16,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:16,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:16,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:16,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:16,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:16,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:16,064 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:16,064 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:16,065 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:16,065 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:16,069 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:16,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:16,072 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 22:03:16,096 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:16,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:16,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:16,099 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:16,099 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:16,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:16,099 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:16,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:16,100 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:16,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:16,101 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:16,101 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:16,101 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:16,101 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:16,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:16,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:16,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:16,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:16,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:16,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:16,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:16,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:16,103 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:16,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:16,356 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:16,374 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:16,377 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:16,379 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:16,379 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:16,380 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-14 22:03:16,457 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b06571560/9bef1f8c0d2b48fd8e06a8c9460d0cd8/FLAGad8327dfd [2019-10-14 22:03:17,128 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:17,129 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label43.c [2019-10-14 22:03:17,150 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b06571560/9bef1f8c0d2b48fd8e06a8c9460d0cd8/FLAGad8327dfd [2019-10-14 22:03:17,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b06571560/9bef1f8c0d2b48fd8e06a8c9460d0cd8 [2019-10-14 22:03:17,301 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:17,303 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:17,304 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:17,304 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:17,307 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:17,308 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:17" (1/1) ... [2019-10-14 22:03:17,311 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:17, skipping insertion in model container [2019-10-14 22:03:17,311 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:17" (1/1) ... [2019-10-14 22:03:17,319 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:17,408 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:18,347 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:18,365 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:18,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:18,762 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:18,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18 WrapperNode [2019-10-14 22:03:18,764 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:18,765 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:18,765 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:18,765 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:18,780 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,810 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,919 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (1/1) ... [2019-10-14 22:03:18,965 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:18,966 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:18,966 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:18,966 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:18,967 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (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 22:03:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:19,025 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:19,026 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:19,026 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:19,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:22,781 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:22,782 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:22,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:22 BoogieIcfgContainer [2019-10-14 22:03:22,787 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:22,788 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:22,788 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:22,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:22,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:17" (1/3) ... [2019-10-14 22:03:22,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4e727c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:22, skipping insertion in model container [2019-10-14 22:03:22,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:18" (2/3) ... [2019-10-14 22:03:22,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f4e727c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:22, skipping insertion in model container [2019-10-14 22:03:22,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:22" (3/3) ... [2019-10-14 22:03:22,797 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label43.c [2019-10-14 22:03:22,807 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:22,816 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:22,827 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:22,856 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:22,857 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:22,857 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:22,857 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:22,857 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:22,857 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:22,858 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:22,858 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:03:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-10-14 22:03:22,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:22,897 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:22,899 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:22,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:22,905 INFO L82 PathProgramCache]: Analyzing trace with hash 402824616, now seen corresponding path program 1 times [2019-10-14 22:03:22,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:22,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252597088] [2019-10-14 22:03:22,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:22,915 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:22,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,281 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 22:03:23,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252597088] [2019-10-14 22:03:23,283 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:23,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:23,284 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561108082] [2019-10-14 22:03:23,289 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:23,289 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:23,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:23,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:23,306 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:29,827 INFO L93 Difference]: Finished difference Result 1575 states and 2878 transitions. [2019-10-14 22:03:29,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:29,829 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2019-10-14 22:03:29,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:29,858 INFO L225 Difference]: With dead ends: 1575 [2019-10-14 22:03:29,859 INFO L226 Difference]: Without dead ends: 1055 [2019-10-14 22:03:29,877 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 22:03:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2019-10-14 22:03:29,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 1024. [2019-10-14 22:03:29,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1024 states. [2019-10-14 22:03:30,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1749 transitions. [2019-10-14 22:03:30,039 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1749 transitions. Word has length 64 [2019-10-14 22:03:30,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:30,040 INFO L462 AbstractCegarLoop]: Abstraction has 1024 states and 1749 transitions. [2019-10-14 22:03:30,040 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:30,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1749 transitions. [2019-10-14 22:03:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 22:03:30,058 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:30,058 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, 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] [2019-10-14 22:03:30,059 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1979650764, now seen corresponding path program 1 times [2019-10-14 22:03:30,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:30,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002508597] [2019-10-14 22:03:30,061 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:30,062 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:30,062 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:30,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,436 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 56 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:30,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002508597] [2019-10-14 22:03:30,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74525561] [2019-10-14 22:03:30,437 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 22:03:30,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:30,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:30,594 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:30,595 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:30,595 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:30,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225083356] [2019-10-14 22:03:30,598 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:30,598 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:30,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:30,599 INFO L87 Difference]: Start difference. First operand 1024 states and 1749 transitions. Second operand 3 states. [2019-10-14 22:03:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:33,316 INFO L93 Difference]: Finished difference Result 2976 states and 5156 transitions. [2019-10-14 22:03:33,322 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:33,323 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 133 [2019-10-14 22:03:33,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:33,336 INFO L225 Difference]: With dead ends: 2976 [2019-10-14 22:03:33,337 INFO L226 Difference]: Without dead ends: 1958 [2019-10-14 22:03:33,341 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:33,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2019-10-14 22:03:33,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1955. [2019-10-14 22:03:33,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1955 states. [2019-10-14 22:03:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1955 states to 1955 states and 2868 transitions. [2019-10-14 22:03:33,412 INFO L78 Accepts]: Start accepts. Automaton has 1955 states and 2868 transitions. Word has length 133 [2019-10-14 22:03:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:33,413 INFO L462 AbstractCegarLoop]: Abstraction has 1955 states and 2868 transitions. [2019-10-14 22:03:33,413 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 1955 states and 2868 transitions. [2019-10-14 22:03:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-14 22:03:33,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:33,417 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, 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 22:03:33,623 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:33,623 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:33,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:33,624 INFO L82 PathProgramCache]: Analyzing trace with hash -459276224, now seen corresponding path program 1 times [2019-10-14 22:03:33,624 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:33,624 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740753535] [2019-10-14 22:03:33,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:33,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:33,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:33,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:33,998 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740753535] [2019-10-14 22:03:33,999 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:33,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 22:03:34,007 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881410618] [2019-10-14 22:03:34,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:34,010 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:34,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:34,011 INFO L87 Difference]: Start difference. First operand 1955 states and 2868 transitions. Second operand 8 states. [2019-10-14 22:03:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:42,006 INFO L93 Difference]: Finished difference Result 5863 states and 8787 transitions. [2019-10-14 22:03:42,009 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:42,010 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 150 [2019-10-14 22:03:42,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:42,035 INFO L225 Difference]: With dead ends: 5863 [2019-10-14 22:03:42,035 INFO L226 Difference]: Without dead ends: 3914 [2019-10-14 22:03:42,043 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2019-10-14 22:03:42,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 2934. [2019-10-14 22:03:42,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2934 states. [2019-10-14 22:03:42,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2934 states to 2934 states and 4016 transitions. [2019-10-14 22:03:42,154 INFO L78 Accepts]: Start accepts. Automaton has 2934 states and 4016 transitions. Word has length 150 [2019-10-14 22:03:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:42,154 INFO L462 AbstractCegarLoop]: Abstraction has 2934 states and 4016 transitions. [2019-10-14 22:03:42,154 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 2934 states and 4016 transitions. [2019-10-14 22:03:42,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-10-14 22:03:42,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:42,161 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:42,162 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:42,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:42,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1475726661, now seen corresponding path program 1 times [2019-10-14 22:03:42,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:42,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090423212] [2019-10-14 22:03:42,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:42,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:42,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:42,873 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:03:42,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090423212] [2019-10-14 22:03:42,874 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239471198] [2019-10-14 22:03:42,874 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 22:03:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:43,005 INFO L256 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 22:03:43,023 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:43,239 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 22:03:43,240 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:43,240 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 22:03:43,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255927405] [2019-10-14 22:03:43,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:43,244 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:43,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:43,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:43,244 INFO L87 Difference]: Start difference. First operand 2934 states and 4016 transitions. Second operand 8 states. [2019-10-14 22:03:48,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:48,185 INFO L93 Difference]: Finished difference Result 8720 states and 12297 transitions. [2019-10-14 22:03:48,186 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:48,186 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 338 [2019-10-14 22:03:48,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:48,220 INFO L225 Difference]: With dead ends: 8720 [2019-10-14 22:03:48,220 INFO L226 Difference]: Without dead ends: 5792 [2019-10-14 22:03:48,231 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 341 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:48,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5792 states. [2019-10-14 22:03:48,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5792 to 5428. [2019-10-14 22:03:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5428 states. [2019-10-14 22:03:48,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5428 states to 5428 states and 7003 transitions. [2019-10-14 22:03:48,452 INFO L78 Accepts]: Start accepts. Automaton has 5428 states and 7003 transitions. Word has length 338 [2019-10-14 22:03:48,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:48,454 INFO L462 AbstractCegarLoop]: Abstraction has 5428 states and 7003 transitions. [2019-10-14 22:03:48,454 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:48,454 INFO L276 IsEmpty]: Start isEmpty. Operand 5428 states and 7003 transitions. [2019-10-14 22:03:48,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 391 [2019-10-14 22:03:48,464 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:48,465 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:48,670 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:48,671 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash 697115230, now seen corresponding path program 1 times [2019-10-14 22:03:48,672 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:48,672 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078373765] [2019-10-14 22:03:48,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:48,673 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:48,673 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:48,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 120 proven. 0 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-14 22:03:49,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078373765] [2019-10-14 22:03:49,182 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:49,183 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 22:03:49,183 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442824425] [2019-10-14 22:03:49,184 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 22:03:49,185 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:49,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 22:03:49,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:03:49,186 INFO L87 Difference]: Start difference. First operand 5428 states and 7003 transitions. Second operand 6 states. [2019-10-14 22:03:54,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:54,519 INFO L93 Difference]: Finished difference Result 13661 states and 18218 transitions. [2019-10-14 22:03:54,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:54,520 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 390 [2019-10-14 22:03:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:54,554 INFO L225 Difference]: With dead ends: 13661 [2019-10-14 22:03:54,554 INFO L226 Difference]: Without dead ends: 8239 [2019-10-14 22:03:54,568 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:54,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8239 states.