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/Problem16_label34.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:04:30,886 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:04:30,889 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:04:30,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:04:30,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:04:30,906 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:04:30,907 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:04:30,909 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:04:30,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:04:30,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:04:30,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:04:30,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:04:30,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:04:30,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:04:30,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:04:30,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:04:30,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:04:30,918 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:04:30,920 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:04:30,922 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:04:30,923 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:04:30,924 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:04:30,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:04:30,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:04:30,928 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:04:30,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:04:30,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:04:30,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:04:30,933 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:04:30,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:04:30,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:04:30,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:04:30,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:04:30,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:04:30,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:04:30,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:04:30,938 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 22:04:30,952 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:04:30,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:04:30,953 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:04:30,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:04:30,954 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:04:30,954 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:04:30,954 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:04:30,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:04:30,955 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:04:30,955 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:04:30,955 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:04:30,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:04:30,956 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:04:30,956 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:04:30,956 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:04:30,956 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:04:30,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:04:30,957 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:04:30,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:04:30,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:04:30,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:04:30,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:04:30,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:04:30,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:04:30,958 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:04:30,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:04:30,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:04:30,959 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:04:30,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:04:31,237 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:04:31,257 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:04:31,260 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:04:31,261 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:04:31,262 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:04:31,262 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-14 22:04:31,328 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6a06bcc/f44ad48761404533821dac8b6c2c694f/FLAGfb92b45cb [2019-10-14 22:04:31,947 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:04:31,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label34.c [2019-10-14 22:04:31,971 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6a06bcc/f44ad48761404533821dac8b6c2c694f/FLAGfb92b45cb [2019-10-14 22:04:32,090 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8d6a06bcc/f44ad48761404533821dac8b6c2c694f [2019-10-14 22:04:32,099 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:04:32,100 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:04:32,101 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:32,102 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:04:32,105 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:04:32,106 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:32" (1/1) ... [2019-10-14 22:04:32,109 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:32, skipping insertion in model container [2019-10-14 22:04:32,109 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:04:32" (1/1) ... [2019-10-14 22:04:32,116 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:04:32,197 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:04:32,980 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:32,992 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:04:33,257 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:04:33,276 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:04:33,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33 WrapperNode [2019-10-14 22:04:33,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:04:33,278 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:04:33,278 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:04:33,278 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:04:33,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,334 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,334 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (1/1) ... [2019-10-14 22:04:33,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:04:33,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:04:33,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:04:33,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:04:33,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (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 22:04:33,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:04:33,493 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:04:33,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:04:33,493 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:04:33,493 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:04:33,493 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:04:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:04:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:04:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:04:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:04:33,494 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:04:33,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:04:33,495 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:04:35,711 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:04:35,712 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:04:35,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:35 BoogieIcfgContainer [2019-10-14 22:04:35,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:04:35,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:04:35,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:04:35,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:04:35,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:04:32" (1/3) ... [2019-10-14 22:04:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d61c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:35, skipping insertion in model container [2019-10-14 22:04:35,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:04:33" (2/3) ... [2019-10-14 22:04:35,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507d61c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:04:35, skipping insertion in model container [2019-10-14 22:04:35,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:04:35" (3/3) ... [2019-10-14 22:04:35,721 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label34.c [2019-10-14 22:04:35,731 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:04:35,739 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:04:35,750 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:04:35,779 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:04:35,779 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:04:35,779 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:04:35,780 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:04:35,780 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:04:35,780 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:04:35,780 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:04:35,780 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:04:35,807 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-14 22:04:35,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 22:04:35,814 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:35,815 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] [2019-10-14 22:04:35,817 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1472830021, now seen corresponding path program 1 times [2019-10-14 22:04:35,831 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:35,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470827801] [2019-10-14 22:04:35,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:35,832 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:35,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:36,107 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 22:04:36,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470827801] [2019-10-14 22:04:36,108 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:36,108 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:04:36,109 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511307959] [2019-10-14 22:04:36,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:36,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:36,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:04:36,130 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 5 states. [2019-10-14 22:04:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:40,740 INFO L93 Difference]: Finished difference Result 1515 states and 2850 transitions. [2019-10-14 22:04:40,741 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:04:40,742 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2019-10-14 22:04:40,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:40,775 INFO L225 Difference]: With dead ends: 1515 [2019-10-14 22:04:40,776 INFO L226 Difference]: Without dead ends: 1038 [2019-10-14 22:04:40,789 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:04:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2019-10-14 22:04:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 1031. [2019-10-14 22:04:40,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1031 states. [2019-10-14 22:04:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1031 states to 1031 states and 1619 transitions. [2019-10-14 22:04:40,936 INFO L78 Accepts]: Start accepts. Automaton has 1031 states and 1619 transitions. Word has length 40 [2019-10-14 22:04:40,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:40,940 INFO L462 AbstractCegarLoop]: Abstraction has 1031 states and 1619 transitions. [2019-10-14 22:04:40,940 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:40,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1031 states and 1619 transitions. [2019-10-14 22:04:40,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-10-14 22:04:40,962 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:40,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:04:40,964 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:40,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:40,965 INFO L82 PathProgramCache]: Analyzing trace with hash -111411403, now seen corresponding path program 1 times [2019-10-14 22:04:40,965 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:40,966 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789648937] [2019-10-14 22:04:40,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,966 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:40,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:04:41,437 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789648937] [2019-10-14 22:04:41,438 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:04:41,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:04:41,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428741402] [2019-10-14 22:04:41,441 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:04:41,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:41,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:04:41,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:04:41,442 INFO L87 Difference]: Start difference. First operand 1031 states and 1619 transitions. Second operand 9 states. [2019-10-14 22:04:45,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:45,516 INFO L93 Difference]: Finished difference Result 3125 states and 5015 transitions. [2019-10-14 22:04:45,516 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:04:45,516 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 175 [2019-10-14 22:04:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:45,533 INFO L225 Difference]: With dead ends: 3125 [2019-10-14 22:04:45,533 INFO L226 Difference]: Without dead ends: 2100 [2019-10-14 22:04:45,537 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:04:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2100 states. [2019-10-14 22:04:45,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2100 to 2069. [2019-10-14 22:04:45,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2069 states. [2019-10-14 22:04:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 3146 transitions. [2019-10-14 22:04:45,643 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 3146 transitions. Word has length 175 [2019-10-14 22:04:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:45,644 INFO L462 AbstractCegarLoop]: Abstraction has 2069 states and 3146 transitions. [2019-10-14 22:04:45,644 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:04:45,644 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 3146 transitions. [2019-10-14 22:04:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2019-10-14 22:04:45,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:45,648 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:45,648 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:45,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:45,649 INFO L82 PathProgramCache]: Analyzing trace with hash 15236199, now seen corresponding path program 1 times [2019-10-14 22:04:45,649 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:45,649 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490352172] [2019-10-14 22:04:45,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:45,650 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:45,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:45,985 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:04:45,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490352172] [2019-10-14 22:04:45,986 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668803364] [2019-10-14 22:04:45,986 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 22:04:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:46,106 INFO L256 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:04:46,127 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:46,266 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 104 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 22:04:46,266 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:04:46,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 22:04:46,267 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457000514] [2019-10-14 22:04:46,268 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:04:46,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:46,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:04:46,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:46,269 INFO L87 Difference]: Start difference. First operand 2069 states and 3146 transitions. Second operand 5 states. [2019-10-14 22:04:48,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:48,978 INFO L93 Difference]: Finished difference Result 5192 states and 7967 transitions. [2019-10-14 22:04:48,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 22:04:48,978 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 210 [2019-10-14 22:04:48,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:48,997 INFO L225 Difference]: With dead ends: 5192 [2019-10-14 22:04:48,997 INFO L226 Difference]: Without dead ends: 3129 [2019-10-14 22:04:49,002 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:04:49,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2019-10-14 22:04:49,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3097. [2019-10-14 22:04:49,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3097 states. [2019-10-14 22:04:49,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3097 states to 3097 states and 3988 transitions. [2019-10-14 22:04:49,099 INFO L78 Accepts]: Start accepts. Automaton has 3097 states and 3988 transitions. Word has length 210 [2019-10-14 22:04:49,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:49,099 INFO L462 AbstractCegarLoop]: Abstraction has 3097 states and 3988 transitions. [2019-10-14 22:04:49,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:04:49,100 INFO L276 IsEmpty]: Start isEmpty. Operand 3097 states and 3988 transitions. [2019-10-14 22:04:49,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2019-10-14 22:04:49,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:49,107 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:04:49,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:49,325 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:49,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:49,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1930172117, now seen corresponding path program 1 times [2019-10-14 22:04:49,325 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:49,326 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567042352] [2019-10-14 22:04:49,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,326 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:49,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:49,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,751 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 172 proven. 71 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:04:49,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567042352] [2019-10-14 22:04:49,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571882434] [2019-10-14 22:04:49,752 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 22:04:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:49,869 INFO L256 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:49,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:04:50,088 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 22:04:50,091 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:04:50,091 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:04:50,092 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746728672] [2019-10-14 22:04:50,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:04:50,093 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:04:50,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:04:50,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:04:50,094 INFO L87 Difference]: Start difference. First operand 3097 states and 3988 transitions. Second operand 11 states. [2019-10-14 22:04:58,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:04:58,133 INFO L93 Difference]: Finished difference Result 10419 states and 14042 transitions. [2019-10-14 22:04:58,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 22:04:58,134 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 319 [2019-10-14 22:04:58,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:04:58,172 INFO L225 Difference]: With dead ends: 10419 [2019-10-14 22:04:58,172 INFO L226 Difference]: Without dead ends: 6317 [2019-10-14 22:04:58,184 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 333 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:04:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6317 states. [2019-10-14 22:04:58,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6317 to 5938. [2019-10-14 22:04:58,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5938 states. [2019-10-14 22:04:58,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5938 states to 5938 states and 7568 transitions. [2019-10-14 22:04:58,364 INFO L78 Accepts]: Start accepts. Automaton has 5938 states and 7568 transitions. Word has length 319 [2019-10-14 22:04:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:04:58,366 INFO L462 AbstractCegarLoop]: Abstraction has 5938 states and 7568 transitions. [2019-10-14 22:04:58,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:04:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 5938 states and 7568 transitions. [2019-10-14 22:04:58,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 521 [2019-10-14 22:04:58,386 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:04:58,387 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 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] [2019-10-14 22:04:58,594 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:04:58,595 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:04:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:04:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 978718812, now seen corresponding path program 1 times [2019-10-14 22:04:58,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:04:58,596 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794896442] [2019-10-14 22:04:58,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:58,596 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:04:58,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:04:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:59,839 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 191 proven. 115 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2019-10-14 22:04:59,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794896442] [2019-10-14 22:04:59,839 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460352855] [2019-10-14 22:04:59,840 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 22:04:59,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:04:59,984 INFO L256 TraceCheckSpWp]: Trace formula consists of 745 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:04:59,991 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:00,223 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 361 proven. 2 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-14 22:05:00,223 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:00,224 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 22:05:00,224 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962388701] [2019-10-14 22:05:00,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 22:05:00,225 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:00,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 22:05:00,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:05:00,226 INFO L87 Difference]: Start difference. First operand 5938 states and 7568 transitions. Second operand 11 states. [2019-10-14 22:05:05,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:05:05,509 INFO L93 Difference]: Finished difference Result 13329 states and 17710 transitions. [2019-10-14 22:05:05,511 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:05:05,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 520 [2019-10-14 22:05:05,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:05:05,546 INFO L225 Difference]: With dead ends: 13329 [2019-10-14 22:05:05,546 INFO L226 Difference]: Without dead ends: 7009 [2019-10-14 22:05:05,572 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 532 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:05:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7009 states. [2019-10-14 22:05:05,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7009 to 6971. [2019-10-14 22:05:05,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6971 states. [2019-10-14 22:05:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 7945 transitions. [2019-10-14 22:05:05,759 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 7945 transitions. Word has length 520 [2019-10-14 22:05:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:05:05,759 INFO L462 AbstractCegarLoop]: Abstraction has 6971 states and 7945 transitions. [2019-10-14 22:05:05,759 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 22:05:05,759 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 7945 transitions. [2019-10-14 22:05:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2019-10-14 22:05:05,791 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:05:05,792 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 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] [2019-10-14 22:05:05,997 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:05:05,997 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:05:05,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:05:05,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1742697075, now seen corresponding path program 1 times [2019-10-14 22:05:05,998 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:05:05,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199553874] [2019-10-14 22:05:05,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:05,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:05:05,999 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:05:06,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 311 proven. 460 refuted. 0 times theorem prover too weak. 1073 trivial. 0 not checked. [2019-10-14 22:05:07,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199553874] [2019-10-14 22:05:07,200 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346427339] [2019-10-14 22:05:07,200 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 22:05:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:05:07,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 1098 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:05:07,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:05:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1844 backedges. 1307 proven. 2 refuted. 0 times theorem prover too weak. 535 trivial. 0 not checked. [2019-10-14 22:05:07,780 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:05:07,780 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-14 22:05:07,780 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979192788] [2019-10-14 22:05:07,782 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:05:07,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:05:07,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:05:07,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:05:07,783 INFO L87 Difference]: Start difference. First operand 6971 states and 7945 transitions. Second operand 12 states.