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/Problem18_label17.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:06:38,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:06:38,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:06:38,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:06:38,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:06:38,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:06:38,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:06:38,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:06:38,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:06:38,933 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:06:38,934 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:06:38,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:06:38,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:06:38,938 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:06:38,940 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:06:38,942 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:06:38,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:06:38,946 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:06:38,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:06:38,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:06:38,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:06:38,957 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:06:38,961 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:06:38,962 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:06:38,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:06:38,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:06:38,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:06:38,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:06:38,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:06:38,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:06:38,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:06:38,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:06:38,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:06:38,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:06:38,979 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:06:38,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:06:38,983 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:06:39,002 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:06:39,002 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:06:39,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:06:39,005 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:06:39,005 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:06:39,005 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:06:39,006 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:06:39,006 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:06:39,006 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:06:39,006 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:06:39,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:06:39,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:06:39,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:06:39,008 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:06:39,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:06:39,009 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:06:39,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:06:39,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:06:39,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:06:39,010 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:06:39,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:06:39,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:39,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:06:39,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:06:39,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:06:39,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:06:39,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:06:39,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:06:39,011 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:06:39,276 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:06:39,292 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:06:39,296 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:06:39,297 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:06:39,298 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:06:39,299 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-13 18:06:39,376 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca1d1ef1/7948c4abe516458daa398f350ca6fb05/FLAGbd669fc61 [2019-10-13 18:06:40,101 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:06:40,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label17.c [2019-10-13 18:06:40,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca1d1ef1/7948c4abe516458daa398f350ca6fb05/FLAGbd669fc61 [2019-10-13 18:06:40,200 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6ca1d1ef1/7948c4abe516458daa398f350ca6fb05 [2019-10-13 18:06:40,210 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:06:40,212 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:06:40,213 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:40,213 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:06:40,216 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:06:40,217 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:40" (1/1) ... [2019-10-13 18:06:40,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39cbab6f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:40, skipping insertion in model container [2019-10-13 18:06:40,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:06:40" (1/1) ... [2019-10-13 18:06:40,229 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:06:40,367 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:06:41,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:41,606 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:06:42,046 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:06:42,073 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:06:42,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42 WrapperNode [2019-10-13 18:06:42,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:06:42,075 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:06:42,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:06:42,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:06:42,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,348 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... [2019-10-13 18:06:42,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:06:42,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:06:42,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:06:42,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:06:42,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:06:42,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:06:42,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:06:42,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:06:42,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:06:42,442 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:06:42,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:06:42,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:06:42,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:06:42,443 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:06:42,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:06:42,443 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:06:42,444 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:06:42,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:06:42,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:06:42,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:06:46,277 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:06:46,279 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:06:46,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:46 BoogieIcfgContainer [2019-10-13 18:06:46,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:06:46,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:06:46,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:06:46,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:06:46,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:06:40" (1/3) ... [2019-10-13 18:06:46,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c526c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:46, skipping insertion in model container [2019-10-13 18:06:46,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:06:42" (2/3) ... [2019-10-13 18:06:46,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26c526c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:06:46, skipping insertion in model container [2019-10-13 18:06:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:06:46" (3/3) ... [2019-10-13 18:06:46,308 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label17.c [2019-10-13 18:06:46,329 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:06:46,343 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:06:46,358 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:06:46,392 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:06:46,392 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:06:46,392 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:06:46,392 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:06:46,393 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:06:46,393 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:06:46,393 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:06:46,393 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:06:46,428 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-13 18:06:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 18:06:46,436 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:46,437 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] [2019-10-13 18:06:46,439 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:46,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1487272786, now seen corresponding path program 1 times [2019-10-13 18:06:46,455 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:46,455 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192122645] [2019-10-13 18:06:46,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:46,456 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:46,456 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:46,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192122645] [2019-10-13 18:06:46,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:46,926 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:06:46,927 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874793732] [2019-10-13 18:06:46,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:06:46,932 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:06:46,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:06:46,950 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-13 18:06:58,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:06:58,272 INFO L93 Difference]: Finished difference Result 3000 states and 5782 transitions. [2019-10-13 18:06:58,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:06:58,274 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 37 [2019-10-13 18:06:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:06:58,310 INFO L225 Difference]: With dead ends: 3000 [2019-10-13 18:06:58,310 INFO L226 Difference]: Without dead ends: 2142 [2019-10-13 18:06:58,323 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 [2019-10-13 18:06:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-13 18:06:58,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2138. [2019-10-13 18:06:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2138 states. [2019-10-13 18:06:58,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2138 states to 2138 states and 3501 transitions. [2019-10-13 18:06:58,547 INFO L78 Accepts]: Start accepts. Automaton has 2138 states and 3501 transitions. Word has length 37 [2019-10-13 18:06:58,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:06:58,548 INFO L462 AbstractCegarLoop]: Abstraction has 2138 states and 3501 transitions. [2019-10-13 18:06:58,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:06:58,548 INFO L276 IsEmpty]: Start isEmpty. Operand 2138 states and 3501 transitions. [2019-10-13 18:06:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 18:06:58,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:06:58,565 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:06:58,566 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:06:58,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:06:58,568 INFO L82 PathProgramCache]: Analyzing trace with hash -270817417, now seen corresponding path program 1 times [2019-10-13 18:06:58,568 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:06:58,569 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226873261] [2019-10-13 18:06:58,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:58,569 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:06:58,569 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:06:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:58,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:06:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:06:58,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226873261] [2019-10-13 18:06:58,917 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:06:58,917 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:06:58,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142636473] [2019-10-13 18:06:58,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:06:58,920 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:06:58,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:06:58,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:06:58,921 INFO L87 Difference]: Start difference. First operand 2138 states and 3501 transitions. Second operand 8 states. [2019-10-13 18:07:09,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:07:09,938 INFO L93 Difference]: Finished difference Result 8664 states and 14432 transitions. [2019-10-13 18:07:09,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:07:09,938 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 106 [2019-10-13 18:07:09,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:07:09,979 INFO L225 Difference]: With dead ends: 8664 [2019-10-13 18:07:09,979 INFO L226 Difference]: Without dead ends: 6532 [2019-10-13 18:07:09,988 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:07:09,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6532 states. [2019-10-13 18:07:10,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6532 to 6511. [2019-10-13 18:07:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6511 states. [2019-10-13 18:07:10,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6511 states to 6511 states and 9250 transitions. [2019-10-13 18:07:10,226 INFO L78 Accepts]: Start accepts. Automaton has 6511 states and 9250 transitions. Word has length 106 [2019-10-13 18:07:10,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:07:10,228 INFO L462 AbstractCegarLoop]: Abstraction has 6511 states and 9250 transitions. [2019-10-13 18:07:10,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:07:10,229 INFO L276 IsEmpty]: Start isEmpty. Operand 6511 states and 9250 transitions. [2019-10-13 18:07:10,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2019-10-13 18:07:10,247 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:07:10,247 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:07:10,248 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:07:10,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:07:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash 126242006, now seen corresponding path program 1 times [2019-10-13 18:07:10,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:07:10,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294694044] [2019-10-13 18:07:10,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:10,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:07:10,253 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:07:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:10,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:10,806 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 153 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:07:10,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294694044] [2019-10-13 18:07:10,807 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160355351] [2019-10-13 18:07:10,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:07:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:07:10,971 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:07:11,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:07:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 154 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:07:11,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:07:11,203 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 18:07:11,203 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6674839] [2019-10-13 18:07:11,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 18:07:11,205 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:07:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 18:07:11,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:07:11,206 INFO L87 Difference]: Start difference. First operand 6511 states and 9250 transitions. Second operand 11 states.