/usr/bin/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_label30.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:13:43,980 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:13:43,983 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:13:43,998 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 19:13:44,022 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:13:44,024 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:13:44,026 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:13:44,028 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:13:44,029 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:13:44,030 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:13:44,032 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:13:44,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:13:44,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:13:44,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:13:44,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:13:44,047 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:13:44,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 19:13:44,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:13:44,062 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:13:44,063 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:13:44,064 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 [2019-11-06 19:13:44,102 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:13:44,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:13:44,103 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:13:44,103 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:13:44,108 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:13:44,108 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:13:44,108 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:13:44,109 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:13:44,110 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:13:44,110 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:13:44,110 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:13:44,110 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:13:44,110 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:13:44,111 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:13:44,111 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:13:44,111 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:13:44,111 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:13:44,111 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:13:44,112 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:13:44,112 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:13:44,112 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:13:44,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:13:44,112 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:13:44,113 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:13:44,387 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:13:44,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:13:44,404 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:13:44,405 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:13:44,406 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:13:44,406 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label30.c [2019-11-06 19:13:44,468 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2b9d79b/8a81117a516e4b87828dafb9caefedf2/FLAGef61abf6d [2019-11-06 19:13:45,113 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:13:45,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label30.c [2019-11-06 19:13:45,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2b9d79b/8a81117a516e4b87828dafb9caefedf2/FLAGef61abf6d [2019-11-06 19:13:45,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a2b9d79b/8a81117a516e4b87828dafb9caefedf2 [2019-11-06 19:13:45,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:13:45,333 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:13:45,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:45,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:13:45,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:13:45,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:45" (1/1) ... [2019-11-06 19:13:45,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b80036e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:45, skipping insertion in model container [2019-11-06 19:13:45,342 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:13:45" (1/1) ... [2019-11-06 19:13:45,350 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:13:45,404 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:13:45,926 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:45,931 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:13:46,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:13:46,138 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:13:46,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46 WrapperNode [2019-11-06 19:13:46,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:13:46,140 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:13:46,140 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:13:46,140 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:13:46,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,181 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (1/1) ... [2019-11-06 19:13:46,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:13:46,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:13:46,298 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:13:46,298 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:13:46,299 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (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 [2019-11-06 19:13:46,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:13:46,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:13:46,390 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:13:46,390 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:13:46,391 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:13:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:13:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:13:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:13:46,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:13:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:13:46,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:13:47,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:13:47,950 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:13:47,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:47 BoogieIcfgContainer [2019-11-06 19:13:47,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:13:47,952 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:13:47,952 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:13:47,955 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:13:47,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:13:45" (1/3) ... [2019-11-06 19:13:47,957 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59eb1c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:47, skipping insertion in model container [2019-11-06 19:13:47,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:13:46" (2/3) ... [2019-11-06 19:13:47,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59eb1c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:13:47, skipping insertion in model container [2019-11-06 19:13:47,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:13:47" (3/3) ... [2019-11-06 19:13:47,960 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label30.c [2019-11-06 19:13:47,969 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:13:47,978 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:13:47,989 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:13:48,025 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:13:48,025 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:13:48,028 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:13:48,028 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:13:48,028 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:13:48,028 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:13:48,029 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:13:48,029 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:13:48,065 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-11-06 19:13:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 19:13:48,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:48,076 INFO L410 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] [2019-11-06 19:13:48,077 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:48,082 INFO L82 PathProgramCache]: Analyzing trace with hash 2061919546, now seen corresponding path program 1 times [2019-11-06 19:13:48,089 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:48,089 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527445637] [2019-11-06 19:13:48,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:48,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:48,510 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527445637] [2019-11-06 19:13:48,511 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:13:48,511 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:13:48,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258819040] [2019-11-06 19:13:48,520 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:13:48,520 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:48,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:13:48,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:13:48,542 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-11-06 19:13:51,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:51,299 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-11-06 19:13:51,300 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:13:51,301 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 49 [2019-11-06 19:13:51,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:51,321 INFO L225 Difference]: With dead ends: 902 [2019-11-06 19:13:51,322 INFO L226 Difference]: Without dead ends: 564 [2019-11-06 19:13:51,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:51,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-06 19:13:51,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-11-06 19:13:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-11-06 19:13:51,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-11-06 19:13:51,442 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 49 [2019-11-06 19:13:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:51,442 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-11-06 19:13:51,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:13:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-11-06 19:13:51,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2019-11-06 19:13:51,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:51,453 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:51,454 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:51,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:51,454 INFO L82 PathProgramCache]: Analyzing trace with hash -2076137238, now seen corresponding path program 1 times [2019-11-06 19:13:51,454 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:51,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541401061] [2019-11-06 19:13:51,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,777 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:51,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541401061] [2019-11-06 19:13:51,778 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298626361] [2019-11-06 19:13:51,779 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 [2019-11-06 19:13:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:51,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:51,884 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:51,977 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:51,977 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:51,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311949830] [2019-11-06 19:13:51,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:51,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:51,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:51,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:51,981 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-11-06 19:13:52,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:52,979 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-11-06 19:13:52,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:52,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 161 [2019-11-06 19:13:52,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:52,989 INFO L225 Difference]: With dead ends: 1666 [2019-11-06 19:13:52,989 INFO L226 Difference]: Without dead ends: 1112 [2019-11-06 19:13:52,991 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:52,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-11-06 19:13:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-11-06 19:13:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-11-06 19:13:53,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-11-06 19:13:53,079 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 161 [2019-11-06 19:13:53,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:53,080 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-11-06 19:13:53,080 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:53,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-11-06 19:13:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-06 19:13:53,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:53,087 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:53,291 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:53,292 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:53,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:53,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1900097298, now seen corresponding path program 1 times [2019-11-06 19:13:53,293 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:53,294 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707369092] [2019-11-06 19:13:53,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:53,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:53,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:53,564 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707369092] [2019-11-06 19:13:53,565 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529545926] [2019-11-06 19:13:53,565 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 [2019-11-06 19:13:53,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:53,650 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:53,655 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:53,702 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:53,703 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:53,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599415228] [2019-11-06 19:13:53,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:53,704 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:53,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:53,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:53,705 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-11-06 19:13:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:54,606 INFO L93 Difference]: Finished difference Result 3138 states and 4371 transitions. [2019-11-06 19:13:54,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:54,607 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 179 [2019-11-06 19:13:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:54,618 INFO L225 Difference]: With dead ends: 3138 [2019-11-06 19:13:54,619 INFO L226 Difference]: Without dead ends: 2032 [2019-11-06 19:13:54,622 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:54,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2019-11-06 19:13:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 2032. [2019-11-06 19:13:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2032 states. [2019-11-06 19:13:54,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2032 states to 2032 states and 2695 transitions. [2019-11-06 19:13:54,690 INFO L78 Accepts]: Start accepts. Automaton has 2032 states and 2695 transitions. Word has length 179 [2019-11-06 19:13:54,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:54,691 INFO L462 AbstractCegarLoop]: Abstraction has 2032 states and 2695 transitions. [2019-11-06 19:13:54,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2032 states and 2695 transitions. [2019-11-06 19:13:54,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-11-06 19:13:54,698 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:54,698 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:13:54,909 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:54,909 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:54,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:54,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2023015511, now seen corresponding path program 1 times [2019-11-06 19:13:54,910 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:54,910 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865719547] [2019-11-06 19:13:54,911 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:54,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:55,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:13:55,262 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865719547] [2019-11-06 19:13:55,263 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694493948] [2019-11-06 19:13:55,264 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 [2019-11-06 19:13:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:55,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:55,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:55,431 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-11-06 19:13:55,431 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:13:55,432 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:13:55,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432152238] [2019-11-06 19:13:55,433 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:13:55,433 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:55,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:13:55,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:55,434 INFO L87 Difference]: Start difference. First operand 2032 states and 2695 transitions. Second operand 3 states. [2019-11-06 19:13:56,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:13:56,352 INFO L93 Difference]: Finished difference Result 4792 states and 6475 transitions. [2019-11-06 19:13:56,356 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:13:56,356 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-11-06 19:13:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:13:56,372 INFO L225 Difference]: With dead ends: 4792 [2019-11-06 19:13:56,372 INFO L226 Difference]: Without dead ends: 2766 [2019-11-06 19:13:56,377 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:13:56,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2766 states. [2019-11-06 19:13:56,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2766 to 2766. [2019-11-06 19:13:56,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2766 states. [2019-11-06 19:13:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2766 states to 2766 states and 3606 transitions. [2019-11-06 19:13:56,465 INFO L78 Accepts]: Start accepts. Automaton has 2766 states and 3606 transitions. Word has length 234 [2019-11-06 19:13:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:13:56,468 INFO L462 AbstractCegarLoop]: Abstraction has 2766 states and 3606 transitions. [2019-11-06 19:13:56,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:13:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2766 states and 3606 transitions. [2019-11-06 19:13:56,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-11-06 19:13:56,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:13:56,477 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:13:56,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:13:56,681 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:13:56,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:13:56,681 INFO L82 PathProgramCache]: Analyzing trace with hash 51520441, now seen corresponding path program 1 times [2019-11-06 19:13:56,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:13:56,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523623890] [2019-11-06 19:13:56,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:13:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:56,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:57,087 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 157 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:13:57,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523623890] [2019-11-06 19:13:57,088 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862826508] [2019-11-06 19:13:57,088 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 [2019-11-06 19:13:57,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:13:57,197 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:13:57,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:13:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:13:57,306 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:13:57,306 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:13:57,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113387194] [2019-11-06 19:13:57,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:13:57,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:13:57,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:13:57,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:13:57,309 INFO L87 Difference]: Start difference. First operand 2766 states and 3606 transitions. Second operand 11 states. [2019-11-06 19:14:00,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:00,872 INFO L93 Difference]: Finished difference Result 6888 states and 10127 transitions. [2019-11-06 19:14:00,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:14:00,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 258 [2019-11-06 19:14:00,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:00,906 INFO L225 Difference]: With dead ends: 6888 [2019-11-06 19:14:00,906 INFO L226 Difference]: Without dead ends: 4310 [2019-11-06 19:14:00,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2019-11-06 19:14:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2019-11-06 19:14:01,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4194. [2019-11-06 19:14:01,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4194 states. [2019-11-06 19:14:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4194 states to 4194 states and 5850 transitions. [2019-11-06 19:14:01,069 INFO L78 Accepts]: Start accepts. Automaton has 4194 states and 5850 transitions. Word has length 258 [2019-11-06 19:14:01,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:01,074 INFO L462 AbstractCegarLoop]: Abstraction has 4194 states and 5850 transitions. [2019-11-06 19:14:01,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:01,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4194 states and 5850 transitions. [2019-11-06 19:14:01,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2019-11-06 19:14:01,085 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:01,085 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:01,289 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:01,289 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:01,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:01,290 INFO L82 PathProgramCache]: Analyzing trace with hash 767399401, now seen corresponding path program 1 times [2019-11-06 19:14:01,290 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:01,290 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75368076] [2019-11-06 19:14:01,290 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:01,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:14:01,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75368076] [2019-11-06 19:14:01,542 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665073698] [2019-11-06 19:14:01,542 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 [2019-11-06 19:14:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:01,674 INFO L256 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:01,680 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-11-06 19:14:01,860 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:01,860 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:01,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228344515] [2019-11-06 19:14:01,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:01,862 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:01,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:01,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:01,863 INFO L87 Difference]: Start difference. First operand 4194 states and 5850 transitions. Second operand 3 states. [2019-11-06 19:14:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:03,002 INFO L93 Difference]: Finished difference Result 8404 states and 12063 transitions. [2019-11-06 19:14:03,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:03,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 266 [2019-11-06 19:14:03,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:03,027 INFO L225 Difference]: With dead ends: 8404 [2019-11-06 19:14:03,027 INFO L226 Difference]: Without dead ends: 4582 [2019-11-06 19:14:03,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:03,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4582 states. [2019-11-06 19:14:03,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4582 to 4392. [2019-11-06 19:14:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4392 states. [2019-11-06 19:14:03,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4392 states to 4392 states and 6310 transitions. [2019-11-06 19:14:03,161 INFO L78 Accepts]: Start accepts. Automaton has 4392 states and 6310 transitions. Word has length 266 [2019-11-06 19:14:03,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:03,162 INFO L462 AbstractCegarLoop]: Abstraction has 4392 states and 6310 transitions. [2019-11-06 19:14:03,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:03,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4392 states and 6310 transitions. [2019-11-06 19:14:03,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2019-11-06 19:14:03,173 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:03,174 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:03,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:03,378 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:03,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:03,379 INFO L82 PathProgramCache]: Analyzing trace with hash 99176805, now seen corresponding path program 1 times [2019-11-06 19:14:03,379 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:03,379 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531133908] [2019-11-06 19:14:03,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:03,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:03,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:03,689 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:14:03,690 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531133908] [2019-11-06 19:14:03,691 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835974913] [2019-11-06 19:14:03,691 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 [2019-11-06 19:14:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:03,796 INFO L256 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:03,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:14:03,906 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:03,907 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:03,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042627632] [2019-11-06 19:14:03,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:03,908 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:03,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:03,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:03,908 INFO L87 Difference]: Start difference. First operand 4392 states and 6310 transitions. Second operand 3 states. [2019-11-06 19:14:04,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:04,893 INFO L93 Difference]: Finished difference Result 6296 states and 9494 transitions. [2019-11-06 19:14:04,894 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:04,894 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 280 [2019-11-06 19:14:04,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:04,930 INFO L225 Difference]: With dead ends: 6296 [2019-11-06 19:14:04,930 INFO L226 Difference]: Without dead ends: 6294 [2019-11-06 19:14:04,936 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:04,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6294 states. [2019-11-06 19:14:05,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6294 to 4608. [2019-11-06 19:14:05,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4608 states. [2019-11-06 19:14:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 6893 transitions. [2019-11-06 19:14:05,099 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 6893 transitions. Word has length 280 [2019-11-06 19:14:05,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:05,100 INFO L462 AbstractCegarLoop]: Abstraction has 4608 states and 6893 transitions. [2019-11-06 19:14:05,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 6893 transitions. [2019-11-06 19:14:05,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2019-11-06 19:14:05,116 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:05,117 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:05,321 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:05,321 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:05,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1113544198, now seen corresponding path program 1 times [2019-11-06 19:14:05,322 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:05,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599233461] [2019-11-06 19:14:05,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,780 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 19:14:05,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599233461] [2019-11-06 19:14:05,781 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23949598] [2019-11-06 19:14:05,781 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:05,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:05,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:05,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:05,975 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 165 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:05,980 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:05,980 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-11-06 19:14:05,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515311926] [2019-11-06 19:14:05,981 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:14:05,981 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:05,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:14:05,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:05,982 INFO L87 Difference]: Start difference. First operand 4608 states and 6893 transitions. Second operand 11 states. [2019-11-06 19:14:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:10,696 INFO L93 Difference]: Finished difference Result 13402 states and 24258 transitions. [2019-11-06 19:14:10,697 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 19:14:10,697 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 285 [2019-11-06 19:14:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:10,763 INFO L225 Difference]: With dead ends: 13402 [2019-11-06 19:14:10,763 INFO L226 Difference]: Without dead ends: 7598 [2019-11-06 19:14:10,793 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 295 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2019-11-06 19:14:10,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7598 states. [2019-11-06 19:14:11,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7598 to 6556. [2019-11-06 19:14:11,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6556 states. [2019-11-06 19:14:11,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6556 states to 6556 states and 10393 transitions. [2019-11-06 19:14:11,104 INFO L78 Accepts]: Start accepts. Automaton has 6556 states and 10393 transitions. Word has length 285 [2019-11-06 19:14:11,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:11,104 INFO L462 AbstractCegarLoop]: Abstraction has 6556 states and 10393 transitions. [2019-11-06 19:14:11,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:11,104 INFO L276 IsEmpty]: Start isEmpty. Operand 6556 states and 10393 transitions. [2019-11-06 19:14:11,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-11-06 19:14:11,124 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:11,124 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 19:14:11,330 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:11,330 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:11,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:11,331 INFO L82 PathProgramCache]: Analyzing trace with hash -875343054, now seen corresponding path program 1 times [2019-11-06 19:14:11,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:11,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577141563] [2019-11-06 19:14:11,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:11,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 187 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-06 19:14:11,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577141563] [2019-11-06 19:14:11,786 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302467289] [2019-11-06 19:14:11,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:11,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:11,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:12,220 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 191 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:14:12,221 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 19:14:12,221 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 11 [2019-11-06 19:14:12,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095302124] [2019-11-06 19:14:12,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 19:14:12,223 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:12,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 19:14:12,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-11-06 19:14:12,223 INFO L87 Difference]: Start difference. First operand 6556 states and 10393 transitions. Second operand 11 states. [2019-11-06 19:14:14,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:14,095 INFO L93 Difference]: Finished difference Result 11174 states and 17838 transitions. [2019-11-06 19:14:14,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 19:14:14,096 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 311 [2019-11-06 19:14:14,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:14,122 INFO L225 Difference]: With dead ends: 11174 [2019-11-06 19:14:14,123 INFO L226 Difference]: Without dead ends: 4990 [2019-11-06 19:14:14,154 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 314 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2019-11-06 19:14:14,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4990 states. [2019-11-06 19:14:14,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4990 to 4816. [2019-11-06 19:14:14,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4816 states. [2019-11-06 19:14:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4816 states to 4816 states and 6215 transitions. [2019-11-06 19:14:14,288 INFO L78 Accepts]: Start accepts. Automaton has 4816 states and 6215 transitions. Word has length 311 [2019-11-06 19:14:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:14,289 INFO L462 AbstractCegarLoop]: Abstraction has 4816 states and 6215 transitions. [2019-11-06 19:14:14,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 19:14:14,289 INFO L276 IsEmpty]: Start isEmpty. Operand 4816 states and 6215 transitions. [2019-11-06 19:14:14,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2019-11-06 19:14:14,301 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:14:14,301 INFO L410 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-11-06 19:14:14,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:14,507 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:14:14,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:14:14,508 INFO L82 PathProgramCache]: Analyzing trace with hash 771497289, now seen corresponding path program 1 times [2019-11-06 19:14:14,508 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:14:14,508 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802979208] [2019-11-06 19:14:14,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:14:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 85 proven. 2 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:14:14,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802979208] [2019-11-06 19:14:14,937 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924563896] [2019-11-06 19:14:14,938 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:15,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:14:15,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 19:14:15,109 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 19:14:15,216 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2019-11-06 19:14:15,216 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 19:14:15,217 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 19:14:15,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255397734] [2019-11-06 19:14:15,218 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 19:14:15,218 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:14:15,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 19:14:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:15,219 INFO L87 Difference]: Start difference. First operand 4816 states and 6215 transitions. Second operand 3 states. [2019-11-06 19:14:15,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:14:15,978 INFO L93 Difference]: Finished difference Result 4816 states and 6215 transitions. [2019-11-06 19:14:15,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 19:14:15,979 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 314 [2019-11-06 19:14:15,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:14:15,980 INFO L225 Difference]: With dead ends: 4816 [2019-11-06 19:14:15,980 INFO L226 Difference]: Without dead ends: 0 [2019-11-06 19:14:15,989 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 19:14:15,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-06 19:14:15,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-06 19:14:15,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-06 19:14:15,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-06 19:14:15,990 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 314 [2019-11-06 19:14:15,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:14:15,990 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-06 19:14:15,990 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 19:14:15,990 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-06 19:14:15,990 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-06 19:14:16,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 19:14:16,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-06 19:14:16,812 WARN L191 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 29 [2019-11-06 19:14:17,101 WARN L191 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 432 DAG size of output: 29