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/recursive-simple/fibo_2calls_6-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-08 06:26:50,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-08 06:26:50,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-08 06:26:50,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-08 06:26:50,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-08 06:26:50,996 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-08 06:26:50,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-08 06:26:51,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-08 06:26:51,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-08 06:26:51,003 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-08 06:26:51,004 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-08 06:26:51,005 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-08 06:26:51,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-08 06:26:51,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-08 06:26:51,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-08 06:26:51,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-08 06:26:51,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-08 06:26:51,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-08 06:26:51,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-08 06:26:51,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-08 06:26:51,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-08 06:26:51,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-08 06:26:51,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-08 06:26:51,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-08 06:26:51,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-08 06:26:51,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-08 06:26:51,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-08 06:26:51,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-08 06:26:51,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-08 06:26:51,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-08 06:26:51,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-08 06:26:51,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-08 06:26:51,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-08 06:26:51,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-08 06:26:51,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-08 06:26:51,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-08 06:26:51,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-08 06:26:51,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-08 06:26:51,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-08 06:26:51,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-08 06:26:51,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-08 06:26:51,034 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 [2019-09-08 06:26:51,052 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-08 06:26:51,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-08 06:26:51,054 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-08 06:26:51,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-08 06:26:51,055 INFO L138 SettingsManager]: * Use SBE=true [2019-09-08 06:26:51,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-08 06:26:51,055 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-08 06:26:51,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-08 06:26:51,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-08 06:26:51,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-08 06:26:51,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-08 06:26:51,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-08 06:26:51,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-08 06:26:51,057 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-08 06:26:51,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-08 06:26:51,057 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-08 06:26:51,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-08 06:26:51,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-08 06:26:51,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-08 06:26:51,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-08 06:26:51,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-08 06:26:51,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-08 06:26:51,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-08 06:26:51,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-08 06:26:51,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-08 06:26:51,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-08 06:26:51,060 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-08 06:26:51,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-08 06:26:51,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-08 06:26:51,098 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-08 06:26:51,116 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-08 06:26:51,120 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-08 06:26:51,123 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-08 06:26:51,123 INFO L275 PluginConnector]: CDTParser initialized [2019-09-08 06:26:51,126 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2019-09-08 06:26:51,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad23e726/cff51af015d24b2bbdb1792525eec5ac/FLAG4f809f8a8 [2019-09-08 06:26:51,755 INFO L306 CDTParser]: Found 1 translation units. [2019-09-08 06:26:51,759 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_6-1.c [2019-09-08 06:26:51,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad23e726/cff51af015d24b2bbdb1792525eec5ac/FLAG4f809f8a8 [2019-09-08 06:26:52,088 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ad23e726/cff51af015d24b2bbdb1792525eec5ac [2019-09-08 06:26:52,109 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-08 06:26:52,111 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-08 06:26:52,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-08 06:26:52,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-08 06:26:52,120 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-08 06:26:52,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,126 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44d00d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52, skipping insertion in model container [2019-09-08 06:26:52,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,135 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-08 06:26:52,155 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-08 06:26:52,342 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:26:52,347 INFO L188 MainTranslator]: Completed pre-run [2019-09-08 06:26:52,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-08 06:26:52,379 INFO L192 MainTranslator]: Completed translation [2019-09-08 06:26:52,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52 WrapperNode [2019-09-08 06:26:52,380 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-08 06:26:52,381 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-08 06:26:52,381 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-08 06:26:52,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-08 06:26:52,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,528 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,529 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,533 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,536 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (1/1) ... [2019-09-08 06:26:52,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-08 06:26:52,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-08 06:26:52,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-08 06:26:52,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-08 06:26:52,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (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 [2019-09-08 06:26:52,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-08 06:26:52,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-08 06:26:52,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2019-09-08 06:26:52,597 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2019-09-08 06:26:52,598 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-08 06:26:52,598 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-08 06:26:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-08 06:26:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2019-09-08 06:26:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2019-09-08 06:26:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-08 06:26:52,599 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-08 06:26:52,600 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-08 06:26:52,850 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-08 06:26:52,851 INFO L283 CfgBuilder]: Removed 0 assume(true) statements. [2019-09-08 06:26:52,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:26:52 BoogieIcfgContainer [2019-09-08 06:26:52,854 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-08 06:26:52,856 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-08 06:26:52,856 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-08 06:26:52,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-08 06:26:52,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.09 06:26:52" (1/3) ... [2019-09-08 06:26:52,877 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414748f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:26:52, skipping insertion in model container [2019-09-08 06:26:52,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.09 06:26:52" (2/3) ... [2019-09-08 06:26:52,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@414748f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.09 06:26:52, skipping insertion in model container [2019-09-08 06:26:52,882 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 08.09 06:26:52" (3/3) ... [2019-09-08 06:26:52,885 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2019-09-08 06:26:52,916 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-08 06:26:52,943 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-08 06:26:52,975 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-08 06:26:53,009 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-08 06:26:53,010 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-08 06:26:53,010 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-08 06:26:53,010 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-08 06:26:53,011 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-08 06:26:53,011 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-08 06:26:53,011 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-08 06:26:53,011 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-08 06:26:53,011 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-08 06:26:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-09-08 06:26:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-08 06:26:53,038 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:53,039 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:53,041 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:53,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:53,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2019-09-08 06:26:53,049 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:53,050 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:53,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:53,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:26:53,242 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:26:53,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:26:53,247 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:26:53,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:26:53,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:26:53,264 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2019-09-08 06:26:53,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:53,402 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2019-09-08 06:26:53,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:26:53,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2019-09-08 06:26:53,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:53,415 INFO L225 Difference]: With dead ends: 44 [2019-09-08 06:26:53,415 INFO L226 Difference]: Without dead ends: 30 [2019-09-08 06:26:53,419 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:26:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-08 06:26:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-09-08 06:26:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:26:53,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:26:53,475 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2019-09-08 06:26:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:53,476 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:26:53,476 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:26:53,476 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:26:53,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-09-08 06:26:53,478 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:53,478 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:53,479 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:53,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2019-09-08 06:26:53,479 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:53,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:53,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,481 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:53,482 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:53,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-08 06:26:53,530 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-08 06:26:53,530 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-08 06:26:53,532 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-08 06:26:53,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-08 06:26:53,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-08 06:26:53,534 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2019-09-08 06:26:53,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:53,621 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2019-09-08 06:26:53,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-08 06:26:53,622 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-09-08 06:26:53,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:53,624 INFO L225 Difference]: With dead ends: 36 [2019-09-08 06:26:53,624 INFO L226 Difference]: Without dead ends: 32 [2019-09-08 06:26:53,626 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-08 06:26:53,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-08 06:26:53,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2019-09-08 06:26:53,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-08 06:26:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2019-09-08 06:26:53,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2019-09-08 06:26:53,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:53,638 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2019-09-08 06:26:53,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-08 06:26:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2019-09-08 06:26:53,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-09-08 06:26:53,640 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:53,640 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:53,641 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:53,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:53,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2019-09-08 06:26:53,642 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:53,642 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,644 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:53,644 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:26:53,757 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:53,757 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:26:53,780 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:53,809 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:26:53,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:26:53,964 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:53,965 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2019-09-08 06:26:53,966 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-08 06:26:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-08 06:26:53,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:26:53,972 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 9 states. [2019-09-08 06:26:54,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:54,260 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2019-09-08 06:26:54,261 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:26:54,261 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2019-09-08 06:26:54,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:54,263 INFO L225 Difference]: With dead ends: 58 [2019-09-08 06:26:54,263 INFO L226 Difference]: Without dead ends: 34 [2019-09-08 06:26:54,265 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:26:54,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-08 06:26:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-08 06:26:54,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-08 06:26:54,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-09-08 06:26:54,276 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2019-09-08 06:26:54,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:54,277 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-09-08 06:26:54,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-08 06:26:54,277 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-09-08 06:26:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-09-08 06:26:54,280 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:54,280 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-08 06:26:54,281 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:54,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:54,282 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2019-09-08 06:26:54,283 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:54,283 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:54,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:54,285 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:54,285 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:54,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-08 06:26:54,400 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:54,400 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:54,430 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:54,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:54,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-08 06:26:54,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:54,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (3)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:26:54,492 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:54,492 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2019-09-08 06:26:54,493 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-08 06:26:54,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-08 06:26:54,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-09-08 06:26:54,494 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2019-09-08 06:26:54,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:54,651 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2019-09-08 06:26:54,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-08 06:26:54,651 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-09-08 06:26:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:54,654 INFO L225 Difference]: With dead ends: 43 [2019-09-08 06:26:54,654 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:26:54,655 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-09-08 06:26:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:26:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-08 06:26:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-08 06:26:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2019-09-08 06:26:54,666 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 27 [2019-09-08 06:26:54,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:54,666 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2019-09-08 06:26:54,666 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-08 06:26:54,666 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2019-09-08 06:26:54,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-09-08 06:26:54,668 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:54,669 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-09-08 06:26:54,669 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:54,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:54,670 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2019-09-08 06:26:54,670 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:54,670 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:54,671 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:54,672 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:54,672 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:54,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:54,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:26:54,773 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:54,773 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:54,796 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:54,816 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:54,819 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-08 06:26:54,903 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:54,904 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2019-09-08 06:26:54,905 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:26:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:26:54,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:26:54,906 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 10 states. [2019-09-08 06:26:55,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:55,200 INFO L93 Difference]: Finished difference Result 70 states and 100 transitions. [2019-09-08 06:26:55,201 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:26:55,201 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2019-09-08 06:26:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:55,203 INFO L225 Difference]: With dead ends: 70 [2019-09-08 06:26:55,203 INFO L226 Difference]: Without dead ends: 39 [2019-09-08 06:26:55,205 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:26:55,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-08 06:26:55,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-09-08 06:26:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-08 06:26:55,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 50 transitions. [2019-09-08 06:26:55,216 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 50 transitions. Word has length 39 [2019-09-08 06:26:55,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:55,216 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 50 transitions. [2019-09-08 06:26:55,216 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:26:55,217 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 50 transitions. [2019-09-08 06:26:55,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-08 06:26:55,218 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:55,219 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 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] [2019-09-08 06:26:55,219 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:55,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:55,220 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2019-09-08 06:26:55,220 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:55,220 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:55,221 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:55,222 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:55,222 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:55,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-09-08 06:26:55,399 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:55,399 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:26:55,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:55,460 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:55,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:55,538 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-09-08 06:26:55,544 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:55,545 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2019-09-08 06:26:55,546 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:26:55,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:26:55,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:26:55,547 INFO L87 Difference]: Start difference. First operand 39 states and 50 transitions. Second operand 14 states. [2019-09-08 06:26:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:56,172 INFO L93 Difference]: Finished difference Result 102 states and 162 transitions. [2019-09-08 06:26:56,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:26:56,173 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2019-09-08 06:26:56,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:56,176 INFO L225 Difference]: With dead ends: 102 [2019-09-08 06:26:56,176 INFO L226 Difference]: Without dead ends: 69 [2019-09-08 06:26:56,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2019-09-08 06:26:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-08 06:26:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2019-09-08 06:26:56,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-08 06:26:56,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 90 transitions. [2019-09-08 06:26:56,194 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 90 transitions. Word has length 40 [2019-09-08 06:26:56,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:56,194 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 90 transitions. [2019-09-08 06:26:56,194 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:26:56,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 90 transitions. [2019-09-08 06:26:56,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-08 06:26:56,198 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:56,198 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 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] [2019-09-08 06:26:56,198 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:56,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:56,199 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2019-09-08 06:26:56,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:56,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:56,200 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:56,201 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:56,201 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:56,295 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-09-08 06:26:56,295 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:56,296 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:26:56,317 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:56,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:56,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:26:56,347 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:56,420 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (6)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:26:56,429 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:56,429 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2019-09-08 06:26:56,430 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-08 06:26:56,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-08 06:26:56,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-08 06:26:56,431 INFO L87 Difference]: Start difference. First operand 60 states and 90 transitions. Second operand 12 states. [2019-09-08 06:26:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:56,667 INFO L93 Difference]: Finished difference Result 106 states and 197 transitions. [2019-09-08 06:26:56,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-08 06:26:56,668 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-09-08 06:26:56,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:56,671 INFO L225 Difference]: With dead ends: 106 [2019-09-08 06:26:56,671 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:26:56,673 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2019-09-08 06:26:56,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:26:56,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2019-09-08 06:26:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-08 06:26:56,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 110 transitions. [2019-09-08 06:26:56,710 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 110 transitions. Word has length 54 [2019-09-08 06:26:56,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:56,715 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 110 transitions. [2019-09-08 06:26:56,715 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-08 06:26:56,715 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 110 transitions. [2019-09-08 06:26:56,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-08 06:26:56,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:56,723 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:56,724 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:56,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1229769625, now seen corresponding path program 1 times [2019-09-08 06:26:56,730 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:56,730 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:56,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:56,732 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:56,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:56,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 24 proven. 67 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-09-08 06:26:56,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:56,920 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:56,934 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:56,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:56,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:26:56,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:57,101 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 13 proven. 92 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2019-09-08 06:26:57,109 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:57,110 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 11 [2019-09-08 06:26:57,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-08 06:26:57,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-08 06:26:57,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2019-09-08 06:26:57,115 INFO L87 Difference]: Start difference. First operand 68 states and 110 transitions. Second operand 11 states. [2019-09-08 06:26:57,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:57,350 INFO L93 Difference]: Finished difference Result 108 states and 210 transitions. [2019-09-08 06:26:57,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:26:57,351 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2019-09-08 06:26:57,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:57,354 INFO L225 Difference]: With dead ends: 108 [2019-09-08 06:26:57,354 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:26:57,355 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:26:57,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:26:57,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 72. [2019-09-08 06:26:57,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-08 06:26:57,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 125 transitions. [2019-09-08 06:26:57,375 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 125 transitions. Word has length 96 [2019-09-08 06:26:57,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:57,376 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 125 transitions. [2019-09-08 06:26:57,376 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-08 06:26:57,376 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 125 transitions. [2019-09-08 06:26:57,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-09-08 06:26:57,381 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:57,381 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 11, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:57,382 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:57,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:57,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1479059966, now seen corresponding path program 2 times [2019-09-08 06:26:57,382 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:57,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:57,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:57,384 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:26:57,384 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:57,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 67 proven. 259 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2019-09-08 06:26:57,686 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:57,686 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:57,712 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-08 06:26:57,791 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:26:57,792 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:57,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:26:57,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:57,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1249 backedges. 67 proven. 259 refuted. 0 times theorem prover too weak. 923 trivial. 0 not checked. [2019-09-08 06:26:57,911 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:57,911 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2019-09-08 06:26:57,913 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-08 06:26:57,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-08 06:26:57,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-09-08 06:26:57,914 INFO L87 Difference]: Start difference. First operand 72 states and 125 transitions. Second operand 10 states. [2019-09-08 06:26:58,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:58,109 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2019-09-08 06:26:58,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-08 06:26:58,110 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 216 [2019-09-08 06:26:58,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:58,115 INFO L225 Difference]: With dead ends: 119 [2019-09-08 06:26:58,115 INFO L226 Difference]: Without dead ends: 115 [2019-09-08 06:26:58,116 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:26:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-08 06:26:58,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 69. [2019-09-08 06:26:58,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-08 06:26:58,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 115 transitions. [2019-09-08 06:26:58,138 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 115 transitions. Word has length 216 [2019-09-08 06:26:58,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:58,139 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 115 transitions. [2019-09-08 06:26:58,139 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-08 06:26:58,139 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 115 transitions. [2019-09-08 06:26:58,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-09-08 06:26:58,142 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:58,142 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:58,143 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:58,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:58,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1885785032, now seen corresponding path program 3 times [2019-09-08 06:26:58,143 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:58,144 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:58,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:58,145 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:58,145 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:58,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 139 proven. 166 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-09-08 06:26:58,364 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:58,364 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:58,381 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:26:58,427 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-08 06:26:58,428 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:58,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-08 06:26:58,434 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:26:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 119 proven. 28 refuted. 0 times theorem prover too weak. 509 trivial. 0 not checked. [2019-09-08 06:26:58,527 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:26:58,527 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 18 [2019-09-08 06:26:58,528 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:26:58,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:26:58,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:26:58,529 INFO L87 Difference]: Start difference. First operand 69 states and 115 transitions. Second operand 18 states. [2019-09-08 06:26:59,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:26:59,534 INFO L93 Difference]: Finished difference Result 174 states and 376 transitions. [2019-09-08 06:26:59,534 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-08 06:26:59,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 163 [2019-09-08 06:26:59,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:26:59,540 INFO L225 Difference]: With dead ends: 174 [2019-09-08 06:26:59,540 INFO L226 Difference]: Without dead ends: 111 [2019-09-08 06:26:59,543 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=929, Unknown=0, NotChecked=0, Total=1122 [2019-09-08 06:26:59,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-08 06:26:59,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 102. [2019-09-08 06:26:59,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-08 06:26:59,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 166 transitions. [2019-09-08 06:26:59,563 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 166 transitions. Word has length 163 [2019-09-08 06:26:59,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:26:59,564 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 166 transitions. [2019-09-08 06:26:59,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:26:59,565 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 166 transitions. [2019-09-08 06:26:59,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-09-08 06:26:59,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:26:59,569 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 13, 13, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:26:59,570 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:26:59,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:26:59,570 INFO L82 PathProgramCache]: Analyzing trace with hash -630778984, now seen corresponding path program 4 times [2019-09-08 06:26:59,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:26:59,571 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:26:59,572 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:59,572 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:26:59,573 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:26:59,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:26:59,786 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 129 proven. 241 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2019-09-08 06:26:59,786 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:26:59,787 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:26:59,804 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-08 06:26:59,876 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:26:59,877 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:26:59,880 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:26:59,887 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 129 proven. 239 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2019-09-08 06:27:00,036 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:00,036 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2019-09-08 06:27:00,038 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-08 06:27:00,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-08 06:27:00,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2019-09-08 06:27:00,039 INFO L87 Difference]: Start difference. First operand 102 states and 166 transitions. Second operand 14 states. [2019-09-08 06:27:00,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:00,295 INFO L93 Difference]: Finished difference Result 132 states and 245 transitions. [2019-09-08 06:27:00,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-08 06:27:00,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 219 [2019-09-08 06:27:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:00,299 INFO L225 Difference]: With dead ends: 132 [2019-09-08 06:27:00,300 INFO L226 Difference]: Without dead ends: 97 [2019-09-08 06:27:00,301 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:00,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-08 06:27:00,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 94. [2019-09-08 06:27:00,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-08 06:27:00,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2019-09-08 06:27:00,316 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 219 [2019-09-08 06:27:00,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:00,317 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2019-09-08 06:27:00,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-08 06:27:00,317 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2019-09-08 06:27:00,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-08 06:27:00,320 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:00,320 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 11, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:00,321 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:00,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:00,321 INFO L82 PathProgramCache]: Analyzing trace with hash 215516676, now seen corresponding path program 5 times [2019-09-08 06:27:00,322 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:00,322 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:00,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:00,324 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:00,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:00,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 102 proven. 257 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-09-08 06:27:00,599 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:00,600 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:00,634 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:00,681 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-09-08 06:27:00,682 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:00,684 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-08 06:27:00,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 920 backedges. 552 proven. 65 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-09-08 06:27:00,819 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:00,820 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 17 [2019-09-08 06:27:00,821 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-08 06:27:00,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-08 06:27:00,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2019-09-08 06:27:00,823 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 17 states. [2019-09-08 06:27:01,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:01,435 INFO L93 Difference]: Finished difference Result 188 states and 277 transitions. [2019-09-08 06:27:01,436 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-08 06:27:01,437 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 190 [2019-09-08 06:27:01,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:01,439 INFO L225 Difference]: With dead ends: 188 [2019-09-08 06:27:01,439 INFO L226 Difference]: Without dead ends: 104 [2019-09-08 06:27:01,440 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:27:01,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-09-08 06:27:01,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 101. [2019-09-08 06:27:01,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-08 06:27:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 129 transitions. [2019-09-08 06:27:01,451 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 129 transitions. Word has length 190 [2019-09-08 06:27:01,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:01,452 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 129 transitions. [2019-09-08 06:27:01,452 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-08 06:27:01,452 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 129 transitions. [2019-09-08 06:27:01,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-08 06:27:01,455 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:01,455 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 12, 10, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:01,456 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:01,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:01,456 INFO L82 PathProgramCache]: Analyzing trace with hash -622300300, now seen corresponding path program 6 times [2019-09-08 06:27:01,456 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:01,457 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:01,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:01,458 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:01,458 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:01,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 156 proven. 81 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-09-08 06:27:01,579 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:01,579 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:01,608 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:01,656 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-09-08 06:27:01,657 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:01,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-08 06:27:01,662 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 288 proven. 22 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2019-09-08 06:27:01,769 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:01,770 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2019-09-08 06:27:01,770 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-08 06:27:01,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-08 06:27:01,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2019-09-08 06:27:01,772 INFO L87 Difference]: Start difference. First operand 101 states and 129 transitions. Second operand 16 states. [2019-09-08 06:27:02,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:02,336 INFO L93 Difference]: Finished difference Result 202 states and 288 transitions. [2019-09-08 06:27:02,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-08 06:27:02,344 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 191 [2019-09-08 06:27:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:02,346 INFO L225 Difference]: With dead ends: 202 [2019-09-08 06:27:02,346 INFO L226 Difference]: Without dead ends: 109 [2019-09-08 06:27:02,348 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=715, Unknown=0, NotChecked=0, Total=870 [2019-09-08 06:27:02,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-08 06:27:02,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-09-08 06:27:02,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-08 06:27:02,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 133 transitions. [2019-09-08 06:27:02,358 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 133 transitions. Word has length 191 [2019-09-08 06:27:02,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:02,359 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 133 transitions. [2019-09-08 06:27:02,359 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-08 06:27:02,359 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 133 transitions. [2019-09-08 06:27:02,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2019-09-08 06:27:02,362 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:02,363 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 13, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:02,363 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:02,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash 806157204, now seen corresponding path program 7 times [2019-09-08 06:27:02,364 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:02,364 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:02,365 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:02,365 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:02,366 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 147 proven. 158 refuted. 0 times theorem prover too weak. 943 trivial. 0 not checked. [2019-09-08 06:27:02,575 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:02,576 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:02,609 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:02,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:27:02,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:02,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1248 backedges. 164 proven. 204 refuted. 0 times theorem prover too weak. 880 trivial. 0 not checked. [2019-09-08 06:27:02,784 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:02,785 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-09-08 06:27:02,786 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:02,787 INFO L87 Difference]: Start difference. First operand 106 states and 133 transitions. Second operand 15 states. [2019-09-08 06:27:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:03,057 INFO L93 Difference]: Finished difference Result 121 states and 153 transitions. [2019-09-08 06:27:03,058 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:27:03,059 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 218 [2019-09-08 06:27:03,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:03,061 INFO L225 Difference]: With dead ends: 121 [2019-09-08 06:27:03,061 INFO L226 Difference]: Without dead ends: 106 [2019-09-08 06:27:03,062 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:27:03,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-08 06:27:03,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-09-08 06:27:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-08 06:27:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2019-09-08 06:27:03,072 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 218 [2019-09-08 06:27:03,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:03,073 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2019-09-08 06:27:03,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:03,073 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2019-09-08 06:27:03,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-09-08 06:27:03,075 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:03,075 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 12, 12, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:03,075 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:03,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:03,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1886347338, now seen corresponding path program 8 times [2019-09-08 06:27:03,076 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:03,076 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:03,077 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:03,077 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-08 06:27:03,078 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:03,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:03,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 216 proven. 85 refuted. 0 times theorem prover too weak. 935 trivial. 0 not checked. [2019-09-08 06:27:03,261 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:03,261 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:03,291 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:03,373 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-08 06:27:03,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:03,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-08 06:27:03,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1236 backedges. 250 proven. 115 refuted. 0 times theorem prover too weak. 871 trivial. 0 not checked. [2019-09-08 06:27:03,539 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:03,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2019-09-08 06:27:03,541 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-08 06:27:03,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-08 06:27:03,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2019-09-08 06:27:03,542 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand 15 states. [2019-09-08 06:27:03,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:03,804 INFO L93 Difference]: Finished difference Result 113 states and 133 transitions. [2019-09-08 06:27:03,804 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-08 06:27:03,805 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 217 [2019-09-08 06:27:03,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:03,807 INFO L225 Difference]: With dead ends: 113 [2019-09-08 06:27:03,807 INFO L226 Difference]: Without dead ends: 93 [2019-09-08 06:27:03,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2019-09-08 06:27:03,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-08 06:27:03,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2019-09-08 06:27:03,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-08 06:27:03,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 109 transitions. [2019-09-08 06:27:03,817 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 109 transitions. Word has length 217 [2019-09-08 06:27:03,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:03,818 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 109 transitions. [2019-09-08 06:27:03,818 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-08 06:27:03,818 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 109 transitions. [2019-09-08 06:27:03,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-08 06:27:03,820 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:03,820 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:03,821 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:03,821 INFO L82 PathProgramCache]: Analyzing trace with hash -854759576, now seen corresponding path program 9 times [2019-09-08 06:27:03,821 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:03,822 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:03,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:03,823 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:03,823 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:03,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 213 proven. 46 refuted. 0 times theorem prover too weak. 679 trivial. 0 not checked. [2019-09-08 06:27:04,002 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:04,002 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:04,016 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-08 06:27:04,054 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-08 06:27:04,054 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:04,056 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:04,061 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:04,173 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 306 proven. 36 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:04,184 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:04,184 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2019-09-08 06:27:04,185 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-08 06:27:04,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-08 06:27:04,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2019-09-08 06:27:04,186 INFO L87 Difference]: Start difference. First operand 93 states and 109 transitions. Second operand 18 states. [2019-09-08 06:27:04,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:04,700 INFO L93 Difference]: Finished difference Result 200 states and 249 transitions. [2019-09-08 06:27:04,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-08 06:27:04,701 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 191 [2019-09-08 06:27:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:04,703 INFO L225 Difference]: With dead ends: 200 [2019-09-08 06:27:04,703 INFO L226 Difference]: Without dead ends: 102 [2019-09-08 06:27:04,705 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 187 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:27:04,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2019-09-08 06:27:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2019-09-08 06:27:04,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-09-08 06:27:04,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2019-09-08 06:27:04,715 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 191 [2019-09-08 06:27:04,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:04,715 INFO L475 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2019-09-08 06:27:04,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-08 06:27:04,716 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2019-09-08 06:27:04,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-09-08 06:27:04,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:04,718 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:04,718 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:04,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:04,719 INFO L82 PathProgramCache]: Analyzing trace with hash 307857833, now seen corresponding path program 10 times [2019-09-08 06:27:04,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:04,719 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:04,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:04,721 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:04,721 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:05,671 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2019-09-08 06:27:05,672 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:05,672 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-08 06:27:05,706 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:05,789 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-08 06:27:05,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:05,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-08 06:27:05,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:06,524 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (16)] Exception during sending of exit command (exit): Broken pipe [2019-09-08 06:27:06,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:06,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 36 [2019-09-08 06:27:06,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-08 06:27:06,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-08 06:27:06,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:27:06,546 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand 36 states. [2019-09-08 06:27:07,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:07,107 INFO L93 Difference]: Finished difference Result 121 states and 140 transitions. [2019-09-08 06:27:07,108 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-08 06:27:07,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2019-09-08 06:27:07,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:07,110 INFO L225 Difference]: With dead ends: 121 [2019-09-08 06:27:07,111 INFO L226 Difference]: Without dead ends: 95 [2019-09-08 06:27:07,113 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 181 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2019-09-08 06:27:07,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-08 06:27:07,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2019-09-08 06:27:07,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-08 06:27:07,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-09-08 06:27:07,124 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 177 [2019-09-08 06:27:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:07,125 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-09-08 06:27:07,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-08 06:27:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-09-08 06:27:07,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-09-08 06:27:07,128 INFO L391 BasicCegarLoop]: Found error trace [2019-09-08 06:27:07,128 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 12, 12, 11, 11, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-08 06:27:07,129 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-08 06:27:07,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-08 06:27:07,129 INFO L82 PathProgramCache]: Analyzing trace with hash -878668120, now seen corresponding path program 11 times [2019-09-08 06:27:07,130 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-08 06:27:07,130 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-08 06:27:07,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:07,132 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-08 06:27:07,132 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-08 06:27:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-08 06:27:07,393 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 85 proven. 272 refuted. 0 times theorem prover too weak. 581 trivial. 0 not checked. [2019-09-08 06:27:07,394 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-08 06:27:07,394 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-08 06:27:07,416 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-08 06:27:07,455 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-08 06:27:07,455 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-08 06:27:07,456 INFO L256 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-08 06:27:07,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-08 06:27:07,606 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 543 proven. 32 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2019-09-08 06:27:07,614 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-08 06:27:07,614 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 20 [2019-09-08 06:27:07,615 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-08 06:27:07,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-08 06:27:07,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2019-09-08 06:27:07,616 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 20 states. [2019-09-08 06:27:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-08 06:27:08,040 INFO L93 Difference]: Finished difference Result 166 states and 193 transitions. [2019-09-08 06:27:08,041 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-08 06:27:08,041 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 191 [2019-09-08 06:27:08,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-08 06:27:08,043 INFO L225 Difference]: With dead ends: 166 [2019-09-08 06:27:08,043 INFO L226 Difference]: Without dead ends: 0 [2019-09-08 06:27:08,045 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2019-09-08 06:27:08,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-09-08 06:27:08,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-09-08 06:27:08,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-09-08 06:27:08,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-09-08 06:27:08,047 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 191 [2019-09-08 06:27:08,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-08 06:27:08,048 INFO L475 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-09-08 06:27:08,048 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-08 06:27:08,048 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-09-08 06:27:08,048 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-09-08 06:27:08,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-09-08 06:27:09,828 WARN L188 SmtUtils]: Spent 502.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2019-09-08 06:27:10,513 WARN L188 SmtUtils]: Spent 591.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 31 [2019-09-08 06:27:10,517 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2019-09-08 06:27:10,518 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:10,518 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-09-08 06:27:10,518 INFO L446 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: true [2019-09-08 06:27:10,518 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-09-08 06:27:10,518 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-09-08 06:27:10,518 INFO L446 ceAbstractionStarter]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2019-09-08 06:27:10,518 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point L39(line 39) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point L38(lines 38 40) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L439 ceAbstractionStarter]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~x~0 6) (<= 6 main_~x~0)) [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point L37-1(line 37) no Hoare annotation was computed. [2019-09-08 06:27:10,519 INFO L443 ceAbstractionStarter]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2019-09-08 06:27:10,520 INFO L446 ceAbstractionStarter]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2019-09-08 06:27:10,520 INFO L439 ceAbstractionStarter]: At program point L23(line 23) the Hoare annotation is: (and (<= fibo2_~n |fibo2_#in~n|) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n)) [2019-09-08 06:27:10,520 INFO L443 ceAbstractionStarter]: For program point L23-1(line 23) no Hoare annotation was computed. [2019-09-08 06:27:10,520 INFO L439 ceAbstractionStarter]: At program point L23-2(line 23) the Hoare annotation is: (and (or (and (<= 3 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 3)) (<= 6 |fibo2_#in~n|) (<= |fibo2_#in~n| 4)) (<= fibo2_~n |fibo2_#in~n|) (or (<= |fibo2_#in~n| 3) (and (<= |fibo2_#t~ret2| 2) (<= 2 |fibo2_#t~ret2|)) (<= 5 |fibo2_#in~n|)) (<= 2 fibo2_~n) (<= |fibo2_#in~n| fibo2_~n) (or (and (<= 1 |fibo2_#t~ret2|) (<= |fibo2_#t~ret2| 1)) (<= 4 |fibo2_#in~n|))) [2019-09-08 06:27:10,520 INFO L443 ceAbstractionStarter]: For program point L20(lines 20 24) no Hoare annotation was computed. [2019-09-08 06:27:10,520 INFO L443 ceAbstractionStarter]: For program point L23-3(line 23) no Hoare annotation was computed. [2019-09-08 06:27:10,521 INFO L443 ceAbstractionStarter]: For program point L18(lines 18 24) no Hoare annotation was computed. [2019-09-08 06:27:10,521 INFO L443 ceAbstractionStarter]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2019-09-08 06:27:10,521 INFO L443 ceAbstractionStarter]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2019-09-08 06:27:10,521 INFO L446 ceAbstractionStarter]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2019-09-08 06:27:10,521 INFO L439 ceAbstractionStarter]: At program point L13(line 13) the Hoare annotation is: (and (<= fibo1_~n |fibo1_#in~n|) (not (<= |fibo1_#in~n| 2)) (<= |fibo1_#in~n| fibo1_~n)) [2019-09-08 06:27:10,521 INFO L443 ceAbstractionStarter]: For program point L13-1(line 13) no Hoare annotation was computed. [2019-09-08 06:27:10,521 INFO L439 ceAbstractionStarter]: At program point L13-2(line 13) the Hoare annotation is: (let ((.cse1 (<= fibo1_~n |fibo1_#in~n|)) (.cse2 (<= |fibo1_#in~n| fibo1_~n))) (let ((.cse0 (and .cse1 (<= 1 |fibo1_#t~ret0|) (<= |fibo1_#in~n| 3) (<= 3 |fibo1_#in~n|) (<= |fibo1_#t~ret0| 1) .cse2))) (and (or (and (<= |fibo1_#t~ret0| 5) (<= 5 |fibo1_#t~ret0|)) (<= |fibo1_#in~n| 5) (<= 7 |fibo1_#in~n|)) (or (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2)) (<= 5 |fibo1_#in~n|) .cse0) (or (and .cse1 (<= 4 |fibo1_#in~n|) .cse2) .cse0)))) [2019-09-08 06:27:10,522 INFO L443 ceAbstractionStarter]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2019-09-08 06:27:10,522 INFO L443 ceAbstractionStarter]: For program point L10(lines 10 14) no Hoare annotation was computed. [2019-09-08 06:27:10,522 INFO L443 ceAbstractionStarter]: For program point L13-3(line 13) no Hoare annotation was computed. [2019-09-08 06:27:10,522 INFO L443 ceAbstractionStarter]: For program point L8(lines 8 14) no Hoare annotation was computed. [2019-09-08 06:27:10,522 INFO L443 ceAbstractionStarter]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2019-09-08 06:27:10,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 08.09 06:27:10 BoogieIcfgContainer [2019-09-08 06:27:10,526 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-09-08 06:27:10,528 INFO L168 Benchmark]: Toolchain (without parser) took 18417.60 ms. Allocated memory was 131.6 MB in the beginning and 524.3 MB in the end (delta: 392.7 MB). Free memory was 87.9 MB in the beginning and 296.1 MB in the end (delta: -208.2 MB). Peak memory consumption was 347.1 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:10,529 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 131.6 MB. Free memory is still 105.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2019-09-08 06:27:10,530 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.08 ms. Allocated memory is still 131.6 MB. Free memory was 87.5 MB in the beginning and 77.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:10,531 INFO L168 Benchmark]: Boogie Preprocessor took 156.71 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 77.7 MB in the beginning and 176.4 MB in the end (delta: -98.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:10,531 INFO L168 Benchmark]: RCFGBuilder took 315.86 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:10,532 INFO L168 Benchmark]: TraceAbstraction took 17670.42 ms. Allocated memory was 199.2 MB in the beginning and 524.3 MB in the end (delta: 325.1 MB). Free memory was 162.9 MB in the beginning and 296.1 MB in the end (delta: -133.2 MB). Peak memory consumption was 354.4 MB. Max. memory is 7.1 GB. [2019-09-08 06:27:10,536 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 131.6 MB. Free memory is still 105.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 265.08 ms. Allocated memory is still 131.6 MB. Free memory was 87.5 MB in the beginning and 77.7 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 156.71 ms. Allocated memory was 131.6 MB in the beginning and 199.2 MB in the end (delta: 67.6 MB). Free memory was 77.7 MB in the beginning and 176.4 MB in the end (delta: -98.7 MB). Peak memory consumption was 16.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 315.86 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 162.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17670.42 ms. Allocated memory was 199.2 MB in the beginning and 524.3 MB in the end (delta: 325.1 MB). Free memory was 162.9 MB in the beginning and 296.1 MB in the end (delta: -133.2 MB). Peak memory consumption was 354.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. SAFE Result, 17.5s OverallTime, 18 OverallIterations, 18 TraceHistogramMax, 6.8s AutomataDifference, 0.0s DeadEndRemovalTime, 2.4s HoareAnnotationTime, HoareTripleCheckerStatistics: 553 SDtfs, 664 SDslu, 4386 SDs, 0 SdLazy, 4148 SolverSat, 544 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2621 GetRequests, 2261 SyntacticMatches, 17 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1244 ImplicationChecksByTransitivity, 5.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 18 MinimizatonAttempts, 148 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 338 PreInvPairs, 803 NumberOfFragments, 161 HoareAnnotationTreeSize, 338 FomulaSimplifications, 38268 FormulaSimplificationTreeSizeReduction, 1.1s HoareSimplificationTime, 11 FomulaSimplificationsInter, 3885 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TraceCheckStatistics: 0.2s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 4537 NumberOfCodeBlocks, 3988 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 4503 ConstructedInterpolants, 0 QuantifiedInterpolants, 1338267 SizeOfPredicates, 78 NumberOfNonLiveVariables, 3782 ConjunctsInSsa, 260 ConjunctsInUnsatCore, 34 InterpolantComputations, 2 PerfectInterpolantSequences, 17549/20880 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...