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_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:01:49,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:01:49,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:01:50,015 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-14 22:01:50,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:01:50,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:01:50,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:01:50,045 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:01:50,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:01:50,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:01:50,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:01:50,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:01:50,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:01:50,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:01:50,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:01:50,065 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:01:50,068 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:01:50,079 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:01:50,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:01:50,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:01:50,082 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:01:50,108 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:01:50,108 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:01:50,110 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:01:50,110 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:01:50,110 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:01:50,110 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:01:50,111 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:01:50,112 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:01:50,112 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:01:50,112 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:01:50,112 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:01:50,112 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:01:50,113 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:01:50,113 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:01:50,113 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:01:50,113 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:01:50,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:50,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:01:50,114 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:01:50,114 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:01:50,114 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:01:50,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:01:50,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:01:50,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:01:50,392 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:01:50,405 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:01:50,408 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:01:50,410 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:01:50,410 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:01:50,411 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-14 22:01:50,473 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3fd3a50/4cd1fae56ef04273a72c57ec7d6c6caf/FLAG71185a80c [2019-10-14 22:01:51,051 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:01:51,054 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label29.c [2019-10-14 22:01:51,082 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3fd3a50/4cd1fae56ef04273a72c57ec7d6c6caf/FLAG71185a80c [2019-10-14 22:01:51,334 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5b3fd3a50/4cd1fae56ef04273a72c57ec7d6c6caf [2019-10-14 22:01:51,344 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:01:51,346 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:01:51,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:51,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:01:51,351 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:01:51,352 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,354 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d3457a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:51, skipping insertion in model container [2019-10-14 22:01:51,355 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:01:51" (1/1) ... [2019-10-14 22:01:51,362 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:01:51,431 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:01:52,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:52,155 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:01:52,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:01:52,299 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:01:52,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52 WrapperNode [2019-10-14 22:01:52,299 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:01:52,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:01:52,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:01:52,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:01:52,315 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,316 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,341 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,388 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... [2019-10-14 22:01:52,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:01:52,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:01:52,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:01:52,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:01:52,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:01:52,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:01:52,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:01:52,536 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:01:52,537 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:01:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:01:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:01:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:01:52,537 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:01:52,539 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:01:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:01:52,540 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:01:54,071 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:01:54,071 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:01:54,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:54 BoogieIcfgContainer [2019-10-14 22:01:54,075 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:01:54,077 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:01:54,077 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:01:54,081 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:01:54,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:01:51" (1/3) ... [2019-10-14 22:01:54,083 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1341aabd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:54, skipping insertion in model container [2019-10-14 22:01:54,083 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:01:52" (2/3) ... [2019-10-14 22:01:54,084 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1341aabd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:01:54, skipping insertion in model container [2019-10-14 22:01:54,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:01:54" (3/3) ... [2019-10-14 22:01:54,091 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label29.c [2019-10-14 22:01:54,102 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:01:54,112 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:01:54,124 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:01:54,160 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:01:54,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:01:54,162 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:01:54,163 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:01:54,163 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:01:54,163 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:01:54,163 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:01:54,163 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:01:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:01:54,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 22:01:54,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:54,215 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] [2019-10-14 22:01:54,217 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:54,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1085195851, now seen corresponding path program 1 times [2019-10-14 22:01:54,237 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:54,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680752570] [2019-10-14 22:01:54,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:54,238 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:54,239 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:54,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:54,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680752570] [2019-10-14 22:01:54,624 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:54,624 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:01:54,624 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213131559] [2019-10-14 22:01:54,629 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:01:54,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:54,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:01:54,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:01:54,644 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:01:59,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:59,411 INFO L93 Difference]: Finished difference Result 902 states and 1627 transitions. [2019-10-14 22:01:59,411 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:01:59,412 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2019-10-14 22:01:59,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:59,433 INFO L225 Difference]: With dead ends: 902 [2019-10-14 22:01:59,433 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:01:59,444 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:01:59,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:01:59,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-14 22:01:59,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-14 22:01:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 782 transitions. [2019-10-14 22:01:59,589 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 782 transitions. Word has length 22 [2019-10-14 22:01:59,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:59,590 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 782 transitions. [2019-10-14 22:01:59,591 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:01:59,591 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 782 transitions. [2019-10-14 22:01:59,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 22:01:59,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:59,603 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:01:59,604 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:59,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:59,605 INFO L82 PathProgramCache]: Analyzing trace with hash 503601434, now seen corresponding path program 1 times [2019-10-14 22:01:59,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:59,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58206041] [2019-10-14 22:01:59,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:59,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:59,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:59,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58206041] [2019-10-14 22:01:59,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441885285] [2019-10-14 22:01:59,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:00,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:00,064 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:00,074 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:00,166 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:00,166 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:00,167 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464901677] [2019-10-14 22:02:00,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:00,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:00,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:00,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:00,173 INFO L87 Difference]: Start difference. First operand 560 states and 782 transitions. Second operand 3 states. [2019-10-14 22:02:01,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:01,096 INFO L93 Difference]: Finished difference Result 1666 states and 2358 transitions. [2019-10-14 22:02:01,096 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:01,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-14 22:02:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:01,105 INFO L225 Difference]: With dead ends: 1666 [2019-10-14 22:02:01,105 INFO L226 Difference]: Without dead ends: 1112 [2019-10-14 22:02:01,109 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2019-10-14 22:02:01,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2019-10-14 22:02:01,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1112 states. [2019-10-14 22:02:01,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1515 transitions. [2019-10-14 22:02:01,164 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1515 transitions. Word has length 134 [2019-10-14 22:02:01,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:01,165 INFO L462 AbstractCegarLoop]: Abstraction has 1112 states and 1515 transitions. [2019-10-14 22:02:01,165 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:01,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1515 transitions. [2019-10-14 22:02:01,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-14 22:02:01,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:01,169 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:01,375 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:01,375 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:01,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:01,376 INFO L82 PathProgramCache]: Analyzing trace with hash -859831850, now seen corresponding path program 1 times [2019-10-14 22:02:01,376 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:01,376 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010412809] [2019-10-14 22:02:01,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:01,377 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:01,377 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:01,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010412809] [2019-10-14 22:02:01,704 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166598615] [2019-10-14 22:02:01,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:01,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:01,784 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:01,826 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:01,827 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:01,827 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627172563] [2019-10-14 22:02:01,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:01,828 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:01,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:01,829 INFO L87 Difference]: Start difference. First operand 1112 states and 1515 transitions. Second operand 3 states. [2019-10-14 22:02:02,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:02,738 INFO L93 Difference]: Finished difference Result 1664 states and 2315 transitions. [2019-10-14 22:02:02,740 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:02,740 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 152 [2019-10-14 22:02:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:02,753 INFO L225 Difference]: With dead ends: 1664 [2019-10-14 22:02:02,753 INFO L226 Difference]: Without dead ends: 1662 [2019-10-14 22:02:02,755 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:02,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1662 states. [2019-10-14 22:02:02,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1662 to 1296. [2019-10-14 22:02:02,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1296 states. [2019-10-14 22:02:02,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1296 states to 1296 states and 1824 transitions. [2019-10-14 22:02:02,825 INFO L78 Accepts]: Start accepts. Automaton has 1296 states and 1824 transitions. Word has length 152 [2019-10-14 22:02:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:02,826 INFO L462 AbstractCegarLoop]: Abstraction has 1296 states and 1824 transitions. [2019-10-14 22:02:02,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1296 states and 1824 transitions. [2019-10-14 22:02:02,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-14 22:02:02,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:02,836 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:03,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:03,038 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash 807627774, now seen corresponding path program 1 times [2019-10-14 22:02:03,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:03,040 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202916487] [2019-10-14 22:02:03,040 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:03,041 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:03,041 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 31 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:03,296 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202916487] [2019-10-14 22:02:03,297 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958857623] [2019-10-14 22:02:03,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:03,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:03,390 INFO L256 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:03,403 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:03,509 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:03,510 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:03,511 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:03,511 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311918950] [2019-10-14 22:02:03,512 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:03,512 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:03,513 INFO L87 Difference]: Start difference. First operand 1296 states and 1824 transitions. Second operand 3 states. [2019-10-14 22:02:04,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:04,313 INFO L93 Difference]: Finished difference Result 3874 states and 5517 transitions. [2019-10-14 22:02:04,315 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:04,316 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 207 [2019-10-14 22:02:04,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:04,330 INFO L225 Difference]: With dead ends: 3874 [2019-10-14 22:02:04,330 INFO L226 Difference]: Without dead ends: 2584 [2019-10-14 22:02:04,335 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:04,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2584 states. [2019-10-14 22:02:04,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2584 to 1486. [2019-10-14 22:02:04,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2019-10-14 22:02:04,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 2028 transitions. [2019-10-14 22:02:04,390 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 2028 transitions. Word has length 207 [2019-10-14 22:02:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:04,391 INFO L462 AbstractCegarLoop]: Abstraction has 1486 states and 2028 transitions. [2019-10-14 22:02:04,391 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 2028 transitions. [2019-10-14 22:02:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2019-10-14 22:02:04,396 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:04,396 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:04,608 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:04,609 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:04,609 INFO L82 PathProgramCache]: Analyzing trace with hash -906411563, now seen corresponding path program 1 times [2019-10-14 22:02:04,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:04,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388837648] [2019-10-14 22:02:04,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:04,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 101 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:05,306 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388837648] [2019-10-14 22:02:05,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228649785] [2019-10-14 22:02:05,307 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:05,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:05,405 INFO L256 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:05,413 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:05,527 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 22:02:05,675 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:05,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-14 22:02:05,676 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765284510] [2019-10-14 22:02:05,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:05,676 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:05,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:05,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:05,677 INFO L87 Difference]: Start difference. First operand 1486 states and 2028 transitions. Second operand 5 states. [2019-10-14 22:02:06,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:06,985 INFO L93 Difference]: Finished difference Result 3548 states and 4771 transitions. [2019-10-14 22:02:06,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:06,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 208 [2019-10-14 22:02:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:06,995 INFO L225 Difference]: With dead ends: 3548 [2019-10-14 22:02:06,996 INFO L226 Difference]: Without dead ends: 1884 [2019-10-14 22:02:06,999 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 210 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:07,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2019-10-14 22:02:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1872. [2019-10-14 22:02:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1872 states. [2019-10-14 22:02:07,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1872 states to 1872 states and 2482 transitions. [2019-10-14 22:02:07,054 INFO L78 Accepts]: Start accepts. Automaton has 1872 states and 2482 transitions. Word has length 208 [2019-10-14 22:02:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:07,055 INFO L462 AbstractCegarLoop]: Abstraction has 1872 states and 2482 transitions. [2019-10-14 22:02:07,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:07,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1872 states and 2482 transitions. [2019-10-14 22:02:07,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-10-14 22:02:07,060 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:07,061 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:07,265 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:07,265 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:07,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -616807464, now seen corresponding path program 1 times [2019-10-14 22:02:07,266 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:07,266 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630224828] [2019-10-14 22:02:07,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:07,267 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:07,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 130 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-10-14 22:02:07,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630224828] [2019-10-14 22:02:07,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726229197] [2019-10-14 22:02:07,581 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 [2019-10-14 22:02:07,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:07,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:07,685 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 153 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-14 22:02:07,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:07,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:07,791 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017884959] [2019-10-14 22:02:07,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:07,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:07,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:07,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:07,792 INFO L87 Difference]: Start difference. First operand 1872 states and 2482 transitions. Second operand 5 states. [2019-10-14 22:02:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:09,069 INFO L93 Difference]: Finished difference Result 4520 states and 6439 transitions. [2019-10-14 22:02:09,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:09,070 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2019-10-14 22:02:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:09,083 INFO L225 Difference]: With dead ends: 4520 [2019-10-14 22:02:09,084 INFO L226 Difference]: Without dead ends: 2836 [2019-10-14 22:02:09,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 280 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:09,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-14 22:02:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2808. [2019-10-14 22:02:09,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2808 states. [2019-10-14 22:02:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2808 states to 2808 states and 3720 transitions. [2019-10-14 22:02:09,170 INFO L78 Accepts]: Start accepts. Automaton has 2808 states and 3720 transitions. Word has length 278 [2019-10-14 22:02:09,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:09,171 INFO L462 AbstractCegarLoop]: Abstraction has 2808 states and 3720 transitions. [2019-10-14 22:02:09,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:09,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2808 states and 3720 transitions. [2019-10-14 22:02:09,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2019-10-14 22:02:09,176 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:09,177 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-14 22:02:09,380 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:09,381 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:09,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:09,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1461451740, now seen corresponding path program 1 times [2019-10-14 22:02:09,382 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:09,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19563757] [2019-10-14 22:02:09,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:09,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:09,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:10,921 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 55 proven. 215 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:10,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19563757] [2019-10-14 22:02:10,922 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642984423] [2019-10-14 22:02:10,922 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 [2019-10-14 22:02:11,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:11,013 INFO L256 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:11,019 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:11,078 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 277 backedges. 208 proven. 53 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 22:02:11,226 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:11,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:11,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130121237] [2019-10-14 22:02:11,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:11,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:11,229 INFO L87 Difference]: Start difference. First operand 2808 states and 3720 transitions. Second operand 16 states. [2019-10-14 22:02:14,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:14,985 INFO L93 Difference]: Finished difference Result 5529 states and 7410 transitions. [2019-10-14 22:02:14,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:02:14,986 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 292 [2019-10-14 22:02:14,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:14,996 INFO L225 Difference]: With dead ends: 5529 [2019-10-14 22:02:14,996 INFO L226 Difference]: Without dead ends: 3046 [2019-10-14 22:02:15,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:02:15,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3046 states. [2019-10-14 22:02:15,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3046 to 2998. [2019-10-14 22:02:15,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2998 states. [2019-10-14 22:02:15,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2998 states to 2998 states and 3641 transitions. [2019-10-14 22:02:15,080 INFO L78 Accepts]: Start accepts. Automaton has 2998 states and 3641 transitions. Word has length 292 [2019-10-14 22:02:15,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:15,081 INFO L462 AbstractCegarLoop]: Abstraction has 2998 states and 3641 transitions. [2019-10-14 22:02:15,081 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:15,081 INFO L276 IsEmpty]: Start isEmpty. Operand 2998 states and 3641 transitions. [2019-10-14 22:02:15,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2019-10-14 22:02:15,087 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:15,088 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:15,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:15,293 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:15,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:15,294 INFO L82 PathProgramCache]: Analyzing trace with hash -370135057, now seen corresponding path program 1 times [2019-10-14 22:02:15,295 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:15,295 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630689446] [2019-10-14 22:02:15,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:15,296 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:15,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:15,931 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-10-14 22:02:15,931 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630689446] [2019-10-14 22:02:15,932 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814388138] [2019-10-14 22:02:15,932 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 [2019-10-14 22:02:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:16,028 INFO L256 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:16,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:16,071 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:16,157 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-14 22:02:16,158 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:16,158 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 13 [2019-10-14 22:02:16,158 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447920175] [2019-10-14 22:02:16,159 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:16,159 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:16,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:16,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:16,160 INFO L87 Difference]: Start difference. First operand 2998 states and 3641 transitions. Second operand 5 states. [2019-10-14 22:02:17,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:17,194 INFO L93 Difference]: Finished difference Result 6190 states and 7685 transitions. [2019-10-14 22:02:17,195 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:17,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 317 [2019-10-14 22:02:17,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:17,209 INFO L225 Difference]: With dead ends: 6190 [2019-10-14 22:02:17,209 INFO L226 Difference]: Without dead ends: 3564 [2019-10-14 22:02:17,217 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:17,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2019-10-14 22:02:17,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 3380. [2019-10-14 22:02:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3380 states. [2019-10-14 22:02:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3380 states to 3380 states and 4076 transitions. [2019-10-14 22:02:17,290 INFO L78 Accepts]: Start accepts. Automaton has 3380 states and 4076 transitions. Word has length 317 [2019-10-14 22:02:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:17,291 INFO L462 AbstractCegarLoop]: Abstraction has 3380 states and 4076 transitions. [2019-10-14 22:02:17,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3380 states and 4076 transitions. [2019-10-14 22:02:17,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2019-10-14 22:02:17,300 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:17,300 INFO L380 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:17,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:17,512 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:17,512 INFO L82 PathProgramCache]: Analyzing trace with hash -59587684, now seen corresponding path program 1 times [2019-10-14 22:02:17,512 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:17,513 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780140923] [2019-10-14 22:02:17,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:17,513 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:17,513 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:17,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:17,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,266 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 286 proven. 73 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-14 22:02:18,266 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780140923] [2019-10-14 22:02:18,267 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99678446] [2019-10-14 22:02:18,267 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 [2019-10-14 22:02:18,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:18,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:18,421 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 486 proven. 2 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2019-10-14 22:02:18,572 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:18,573 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:02:18,573 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008783213] [2019-10-14 22:02:18,574 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:18,574 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:18,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:18,575 INFO L87 Difference]: Start difference. First operand 3380 states and 4076 transitions. Second operand 9 states. [2019-10-14 22:02:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:20,687 INFO L93 Difference]: Finished difference Result 7500 states and 9131 transitions. [2019-10-14 22:02:20,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:02:20,688 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 427 [2019-10-14 22:02:20,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:20,704 INFO L225 Difference]: With dead ends: 7500 [2019-10-14 22:02:20,704 INFO L226 Difference]: Without dead ends: 4122 [2019-10-14 22:02:20,712 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 440 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:20,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2019-10-14 22:02:20,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 4122. [2019-10-14 22:02:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4122 states. [2019-10-14 22:02:20,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4122 states to 4122 states and 4829 transitions. [2019-10-14 22:02:20,792 INFO L78 Accepts]: Start accepts. Automaton has 4122 states and 4829 transitions. Word has length 427 [2019-10-14 22:02:20,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:20,793 INFO L462 AbstractCegarLoop]: Abstraction has 4122 states and 4829 transitions. [2019-10-14 22:02:20,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:20,793 INFO L276 IsEmpty]: Start isEmpty. Operand 4122 states and 4829 transitions. [2019-10-14 22:02:20,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2019-10-14 22:02:20,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,805 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:21,011 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:21,012 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:21,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:21,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1728846883, now seen corresponding path program 1 times [2019-10-14 22:02:21,013 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:21,014 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927494696] [2019-10-14 22:02:21,014 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:21,015 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:21,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:21,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 393 proven. 81 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2019-10-14 22:02:22,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927494696] [2019-10-14 22:02:22,338 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042239609] [2019-10-14 22:02:22,338 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 [2019-10-14 22:02:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:22,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:22,472 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:22,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 951 backedges. 662 proven. 2 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-14 22:02:23,121 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:23,121 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:23,121 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808832686] [2019-10-14 22:02:23,124 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:23,124 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:23,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:23,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:23,125 INFO L87 Difference]: Start difference. First operand 4122 states and 4829 transitions. Second operand 12 states. [2019-10-14 22:02:25,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:25,245 INFO L93 Difference]: Finished difference Result 7941 states and 9369 transitions. [2019-10-14 22:02:25,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:02:25,245 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 511 [2019-10-14 22:02:25,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:25,259 INFO L225 Difference]: With dead ends: 7941 [2019-10-14 22:02:25,259 INFO L226 Difference]: Without dead ends: 4148 [2019-10-14 22:02:25,267 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 530 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:25,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2019-10-14 22:02:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 4114. [2019-10-14 22:02:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4114 states. [2019-10-14 22:02:25,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4114 states to 4114 states and 4635 transitions. [2019-10-14 22:02:25,344 INFO L78 Accepts]: Start accepts. Automaton has 4114 states and 4635 transitions. Word has length 511 [2019-10-14 22:02:25,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:25,345 INFO L462 AbstractCegarLoop]: Abstraction has 4114 states and 4635 transitions. [2019-10-14 22:02:25,345 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:25,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4114 states and 4635 transitions. [2019-10-14 22:02:25,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2019-10-14 22:02:25,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:25,358 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:25,570 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:25,570 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:25,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2077729423, now seen corresponding path program 2 times [2019-10-14 22:02:25,572 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:25,572 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127710091] [2019-10-14 22:02:25,572 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:25,573 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:25,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:25,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat