java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:01,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:01,944 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:01,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:01,965 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:01,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:01,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:01,977 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:01,982 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:01,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:01,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:01,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:01,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:01,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:01,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:01,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:01,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:01,997 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:01,998 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:02,003 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:02,008 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:02,011 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:02,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:02,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:02,017 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:02,022 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:02,024 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:02,025 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:02,026 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:02,027 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:02,027 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:02,028 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:02,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:02,029 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:02,030 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:02,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:02,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:02,051 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:02,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:02,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:02,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:02,054 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:02,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:02,054 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:02,054 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:02,054 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:02,055 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:02,056 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:02,056 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:02,056 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:02,057 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:02,057 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:02,057 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:02,057 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:02,057 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:02,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:02,058 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:02,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:02,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:02,058 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:02,058 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:02,059 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:02,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:02,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:02,059 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:02,059 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:02,375 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:02,391 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:02,395 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:02,397 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:02,397 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:02,398 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-13 18:02:02,482 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ca5587c/b0f215a9b66746c28807b44f1e0bbe68/FLAG768f6efba [2019-10-13 18:02:03,057 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:03,058 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label05.c [2019-10-13 18:02:03,072 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ca5587c/b0f215a9b66746c28807b44f1e0bbe68/FLAG768f6efba [2019-10-13 18:02:03,336 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36ca5587c/b0f215a9b66746c28807b44f1e0bbe68 [2019-10-13 18:02:03,345 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:03,347 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:03,348 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:03,348 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:03,352 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:03,354 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:03" (1/1) ... [2019-10-13 18:02:03,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ad33d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:03, skipping insertion in model container [2019-10-13 18:02:03,358 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:03" (1/1) ... [2019-10-13 18:02:03,367 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:03,428 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:04,022 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:04,037 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:04,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:04,388 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:04,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04 WrapperNode [2019-10-13 18:02:04,391 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:04,392 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:04,392 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:04,392 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:04,411 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,439 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,491 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,549 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... [2019-10-13 18:02:04,574 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:04,575 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:04,575 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:04,575 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:04,576 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:04,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:04,689 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:04,690 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:06,412 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:06,412 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:06,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:06 BoogieIcfgContainer [2019-10-13 18:02:06,414 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:06,415 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:06,415 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:06,418 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:06,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:03" (1/3) ... [2019-10-13 18:02:06,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132c7e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:06, skipping insertion in model container [2019-10-13 18:02:06,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:04" (2/3) ... [2019-10-13 18:02:06,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132c7e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:06, skipping insertion in model container [2019-10-13 18:02:06,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:06" (3/3) ... [2019-10-13 18:02:06,423 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label05.c [2019-10-13 18:02:06,433 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:06,442 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:06,453 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:06,481 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:06,481 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:06,481 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:06,481 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:06,481 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:06,482 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:06,482 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:06,482 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:06,507 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:06,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-13 18:02:06,518 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:06,519 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:06,521 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:06,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:06,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1411665610, now seen corresponding path program 1 times [2019-10-13 18:02:06,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:06,534 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049341493] [2019-10-13 18:02:06,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:06,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:06,535 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:06,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:06,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:06,970 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049341493] [2019-10-13 18:02:06,971 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:06,971 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:06,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771396626] [2019-10-13 18:02:06,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:06,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:06,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:06,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:07,002 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:09,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:09,293 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-13 18:02:09,296 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:09,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-13 18:02:09,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:09,317 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:09,317 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:09,327 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:09,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-13 18:02:09,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 18:02:09,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-13 18:02:09,426 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 69 [2019-10-13 18:02:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:09,427 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-13 18:02:09,428 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-13 18:02:09,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-10-13 18:02:09,442 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:09,442 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:09,443 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:09,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:09,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1477947551, now seen corresponding path program 1 times [2019-10-13 18:02:09,445 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:09,445 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528546847] [2019-10-13 18:02:09,445 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:09,446 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:09,446 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:09,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:09,907 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:09,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528546847] [2019-10-13 18:02:09,909 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:09,909 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:09,909 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339142564] [2019-10-13 18:02:09,916 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:09,916 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:09,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:09,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:09,917 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-13 18:02:12,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:12,439 INFO L93 Difference]: Finished difference Result 2246 states and 3775 transitions. [2019-10-13 18:02:12,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:12,440 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 138 [2019-10-13 18:02:12,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:12,456 INFO L225 Difference]: With dead ends: 2246 [2019-10-13 18:02:12,457 INFO L226 Difference]: Without dead ends: 1694 [2019-10-13 18:02:12,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:02:12,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2019-10-13 18:02:12,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1128. [2019-10-13 18:02:12,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1128 states. [2019-10-13 18:02:12,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1732 transitions. [2019-10-13 18:02:12,548 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1732 transitions. Word has length 138 [2019-10-13 18:02:12,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:12,548 INFO L462 AbstractCegarLoop]: Abstraction has 1128 states and 1732 transitions. [2019-10-13 18:02:12,548 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:12,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1732 transitions. [2019-10-13 18:02:12,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-10-13 18:02:12,560 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:12,560 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:12,561 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:12,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1280489606, now seen corresponding path program 1 times [2019-10-13 18:02:12,563 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:12,563 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298901155] [2019-10-13 18:02:12,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:12,563 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:12,564 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:12,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:12,800 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298901155] [2019-10-13 18:02:12,801 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:12,801 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:12,801 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463813079] [2019-10-13 18:02:12,805 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:12,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:12,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:12,811 INFO L87 Difference]: Start difference. First operand 1128 states and 1732 transitions. Second operand 8 states. [2019-10-13 18:02:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:14,696 INFO L93 Difference]: Finished difference Result 2856 states and 4565 transitions. [2019-10-13 18:02:14,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:14,699 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 139 [2019-10-13 18:02:14,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:14,714 INFO L225 Difference]: With dead ends: 2856 [2019-10-13 18:02:14,714 INFO L226 Difference]: Without dead ends: 1734 [2019-10-13 18:02:14,718 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2019-10-13 18:02:14,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1706. [2019-10-13 18:02:14,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1706 states. [2019-10-13 18:02:14,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1706 states to 1706 states and 2406 transitions. [2019-10-13 18:02:14,796 INFO L78 Accepts]: Start accepts. Automaton has 1706 states and 2406 transitions. Word has length 139 [2019-10-13 18:02:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:14,798 INFO L462 AbstractCegarLoop]: Abstraction has 1706 states and 2406 transitions. [2019-10-13 18:02:14,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:14,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1706 states and 2406 transitions. [2019-10-13 18:02:14,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 18:02:14,800 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:14,800 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:14,801 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:14,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:14,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1200752790, now seen corresponding path program 1 times [2019-10-13 18:02:14,801 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:14,802 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112691890] [2019-10-13 18:02:14,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,802 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:14,802 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:15,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112691890] [2019-10-13 18:02:15,011 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:15,011 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:15,011 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773195501] [2019-10-13 18:02:15,012 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:15,012 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:15,013 INFO L87 Difference]: Start difference. First operand 1706 states and 2406 transitions. Second operand 8 states. [2019-10-13 18:02:17,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:17,086 INFO L93 Difference]: Finished difference Result 4296 states and 6639 transitions. [2019-10-13 18:02:17,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:02:17,087 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 141 [2019-10-13 18:02:17,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:17,108 INFO L225 Difference]: With dead ends: 4296 [2019-10-13 18:02:17,109 INFO L226 Difference]: Without dead ends: 2596 [2019-10-13 18:02:17,115 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:17,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2019-10-13 18:02:17,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 2094. [2019-10-13 18:02:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2094 states. [2019-10-13 18:02:17,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2094 states to 2094 states and 2889 transitions. [2019-10-13 18:02:17,216 INFO L78 Accepts]: Start accepts. Automaton has 2094 states and 2889 transitions. Word has length 141 [2019-10-13 18:02:17,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:17,217 INFO L462 AbstractCegarLoop]: Abstraction has 2094 states and 2889 transitions. [2019-10-13 18:02:17,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:02:17,217 INFO L276 IsEmpty]: Start isEmpty. Operand 2094 states and 2889 transitions. [2019-10-13 18:02:17,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-13 18:02:17,222 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:17,222 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:17,222 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:17,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:17,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1200458230, now seen corresponding path program 1 times [2019-10-13 18:02:17,223 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:17,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818114264] [2019-10-13 18:02:17,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:17,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:17,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:17,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818114264] [2019-10-13 18:02:17,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113233267] [2019-10-13 18:02:17,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:17,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:17,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:17,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:17,865 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-13 18:02:17,865 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:17,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:17,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776095284] [2019-10-13 18:02:17,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:17,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:17,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:17,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:17,868 INFO L87 Difference]: Start difference. First operand 2094 states and 2889 transitions. Second operand 3 states. [2019-10-13 18:02:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:18,741 INFO L93 Difference]: Finished difference Result 4918 states and 6767 transitions. [2019-10-13 18:02:18,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:18,742 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2019-10-13 18:02:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:18,758 INFO L225 Difference]: With dead ends: 4918 [2019-10-13 18:02:18,758 INFO L226 Difference]: Without dead ends: 2830 [2019-10-13 18:02:18,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:18,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2830 states. [2019-10-13 18:02:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2830 to 2644. [2019-10-13 18:02:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2644 states. [2019-10-13 18:02:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2644 states to 2644 states and 3578 transitions. [2019-10-13 18:02:18,848 INFO L78 Accepts]: Start accepts. Automaton has 2644 states and 3578 transitions. Word has length 225 [2019-10-13 18:02:18,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:18,851 INFO L462 AbstractCegarLoop]: Abstraction has 2644 states and 3578 transitions. [2019-10-13 18:02:18,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:18,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2644 states and 3578 transitions. [2019-10-13 18:02:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-10-13 18:02:18,859 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:18,860 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:19,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:19,063 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:19,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:19,064 INFO L82 PathProgramCache]: Analyzing trace with hash -398735987, now seen corresponding path program 1 times [2019-10-13 18:02:19,064 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:19,065 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039217945] [2019-10-13 18:02:19,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:19,065 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:19,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,661 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 220 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:19,661 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039217945] [2019-10-13 18:02:19,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611233896] [2019-10-13 18:02:19,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:19,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:19,791 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 18:02:19,871 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:19,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13] total 14 [2019-10-13 18:02:19,872 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930198980] [2019-10-13 18:02:19,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:19,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:19,874 INFO L87 Difference]: Start difference. First operand 2644 states and 3578 transitions. Second operand 3 states. [2019-10-13 18:02:20,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:20,694 INFO L93 Difference]: Finished difference Result 5100 states and 6954 transitions. [2019-10-13 18:02:20,695 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:20,695 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-10-13 18:02:20,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:20,710 INFO L225 Difference]: With dead ends: 5100 [2019-10-13 18:02:20,710 INFO L226 Difference]: Without dead ends: 2644 [2019-10-13 18:02:20,717 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2019-10-13 18:02:20,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2278. [2019-10-13 18:02:20,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-13 18:02:20,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 3024 transitions. [2019-10-13 18:02:20,825 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 3024 transitions. Word has length 280 [2019-10-13 18:02:20,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:20,826 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 3024 transitions. [2019-10-13 18:02:20,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:20,826 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 3024 transitions. [2019-10-13 18:02:20,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-10-13 18:02:20,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:20,837 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:21,041 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:21,041 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:21,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:21,042 INFO L82 PathProgramCache]: Analyzing trace with hash 451455961, now seen corresponding path program 1 times [2019-10-13 18:02:21,042 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:21,042 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255827695] [2019-10-13 18:02:21,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:21,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:21,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,721 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 228 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:02:21,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255827695] [2019-10-13 18:02:21,721 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500935155] [2019-10-13 18:02:21,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:21,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:02:21,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:21,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:02:22,172 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:02:22,172 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:22,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-13 18:02:22,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866855058] [2019-10-13 18:02:22,174 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:22,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:22,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:22,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2019-10-13 18:02:22,176 INFO L87 Difference]: Start difference. First operand 2278 states and 3024 transitions. Second operand 5 states. [2019-10-13 18:02:23,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:23,411 INFO L93 Difference]: Finished difference Result 4396 states and 5902 transitions. [2019-10-13 18:02:23,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:02:23,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 334 [2019-10-13 18:02:23,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:23,426 INFO L225 Difference]: With dead ends: 4396 [2019-10-13 18:02:23,426 INFO L226 Difference]: Without dead ends: 2308 [2019-10-13 18:02:23,433 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 337 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:23,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2019-10-13 18:02:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 2288. [2019-10-13 18:02:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2019-10-13 18:02:23,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 2998 transitions. [2019-10-13 18:02:23,526 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 2998 transitions. Word has length 334 [2019-10-13 18:02:23,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:23,527 INFO L462 AbstractCegarLoop]: Abstraction has 2288 states and 2998 transitions. [2019-10-13 18:02:23,527 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:23,527 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 2998 transitions. [2019-10-13 18:02:23,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2019-10-13 18:02:23,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:23,539 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:23,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:23,751 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:23,752 INFO L82 PathProgramCache]: Analyzing trace with hash -614545183, now seen corresponding path program 1 times [2019-10-13 18:02:23,753 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:23,753 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158505649] [2019-10-13 18:02:23,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,754 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:23,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:23,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 196 proven. 263 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:02:25,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158505649] [2019-10-13 18:02:25,094 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604698128] [2019-10-13 18:02:25,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:25,232 INFO L256 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:02:25,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:25,347 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:25,592 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 350 proven. 53 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-13 18:02:25,592 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:25,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:02:25,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201330570] [2019-10-13 18:02:25,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:02:25,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:25,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:02:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:02:25,595 INFO L87 Difference]: Start difference. First operand 2288 states and 2998 transitions. Second operand 16 states. [2019-10-13 18:02:29,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:29,641 INFO L93 Difference]: Finished difference Result 4512 states and 5985 transitions. [2019-10-13 18:02:29,642 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 18:02:29,642 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 418 [2019-10-13 18:02:29,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:29,653 INFO L225 Difference]: With dead ends: 4512 [2019-10-13 18:02:29,653 INFO L226 Difference]: Without dead ends: 2363 [2019-10-13 18:02:29,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 439 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 18:02:29,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2019-10-13 18:02:29,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2278. [2019-10-13 18:02:29,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2278 states. [2019-10-13 18:02:29,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2278 states to 2278 states and 2741 transitions. [2019-10-13 18:02:29,733 INFO L78 Accepts]: Start accepts. Automaton has 2278 states and 2741 transitions. Word has length 418 [2019-10-13 18:02:29,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:29,734 INFO L462 AbstractCegarLoop]: Abstraction has 2278 states and 2741 transitions. [2019-10-13 18:02:29,734 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:02:29,734 INFO L276 IsEmpty]: Start isEmpty. Operand 2278 states and 2741 transitions. [2019-10-13 18:02:29,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2019-10-13 18:02:29,752 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:29,752 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:29,957 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:29,959 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:29,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:29,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1636558626, now seen corresponding path program 1 times [2019-10-13 18:02:29,961 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:29,961 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984435754] [2019-10-13 18:02:29,962 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:29,963 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:29,963 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:30,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 474 proven. 111 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:02:30,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984435754] [2019-10-13 18:02:30,820 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35130309] [2019-10-13 18:02:30,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:30,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:02:30,990 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 907 backedges. 736 proven. 2 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-13 18:02:31,177 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:31,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:02:31,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748012882] [2019-10-13 18:02:31,178 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:31,178 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:31,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:31,179 INFO L87 Difference]: Start difference. First operand 2278 states and 2741 transitions. Second operand 9 states. [2019-10-13 18:02:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:33,220 INFO L93 Difference]: Finished difference Result 4926 states and 6003 transitions. [2019-10-13 18:02:33,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:02:33,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 553 [2019-10-13 18:02:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:33,229 INFO L225 Difference]: With dead ends: 4926 [2019-10-13 18:02:33,229 INFO L226 Difference]: Without dead ends: 2838 [2019-10-13 18:02:33,235 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 566 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:02:33,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2019-10-13 18:02:33,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2652. [2019-10-13 18:02:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2652 states. [2019-10-13 18:02:33,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2652 states to 2652 states and 3110 transitions. [2019-10-13 18:02:33,310 INFO L78 Accepts]: Start accepts. Automaton has 2652 states and 3110 transitions. Word has length 553 [2019-10-13 18:02:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:33,311 INFO L462 AbstractCegarLoop]: Abstraction has 2652 states and 3110 transitions. [2019-10-13 18:02:33,311 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 2652 states and 3110 transitions. [2019-10-13 18:02:33,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2019-10-13 18:02:33,339 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:33,340 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:33,545 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:33,546 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:33,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1784161946, now seen corresponding path program 1 times [2019-10-13 18:02:33,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:33,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289574215] [2019-10-13 18:02:33,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,547 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:33,547 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:33,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 628 proven. 119 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-13 18:02:35,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289574215] [2019-10-13 18:02:35,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444222003] [2019-10-13 18:02:35,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:35,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 935 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:02:35,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:35,788 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:02:36,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 969 proven. 2 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2019-10-13 18:02:36,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:02:36,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:02:36,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037062709] [2019-10-13 18:02:36,309 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:02:36,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:36,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:02:36,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:36,310 INFO L87 Difference]: Start difference. First operand 2652 states and 3110 transitions. Second operand 12 states.