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_label54.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:28,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:28,958 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:28,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:28,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:28,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:28,982 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:28,991 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:28,993 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:28,995 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:28,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:28,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:28,998 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:28,999 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:29,000 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:29,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:29,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:29,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:29,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:29,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:29,011 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:29,012 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:29,013 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:29,014 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:29,016 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:29,023 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:29,024 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:29,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:29,026 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 22:02:29,039 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:29,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:29,041 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:29,041 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:29,041 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:29,042 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:29,042 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:29,042 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:29,042 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:29,042 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:29,043 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:29,044 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:29,044 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:29,044 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:29,044 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:29,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:29,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:29,045 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:29,047 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:29,047 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:29,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:29,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:29,048 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:29,048 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:29,346 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:29,364 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:29,368 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:29,369 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:29,370 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:29,371 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-14 22:02:29,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6b9e7df/f5f7bdd7be344d88b38d40adbac57242/FLAGeaa05113b [2019-10-14 22:02:30,055 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:30,056 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label54.c [2019-10-14 22:02:30,068 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6b9e7df/f5f7bdd7be344d88b38d40adbac57242/FLAGeaa05113b [2019-10-14 22:02:30,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6b9e7df/f5f7bdd7be344d88b38d40adbac57242 [2019-10-14 22:02:30,351 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:30,353 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:30,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:30,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:30,357 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:30,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:30" (1/1) ... [2019-10-14 22:02:30,362 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67e4cadf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:30, skipping insertion in model container [2019-10-14 22:02:30,362 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:30" (1/1) ... [2019-10-14 22:02:30,370 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:30,445 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:31,084 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:31,089 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:31,228 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:31,246 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:31,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31 WrapperNode [2019-10-14 22:02:31,247 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:31,248 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:31,249 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:31,249 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:31,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,340 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (1/1) ... [2019-10-14 22:02:31,408 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:31,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:31,409 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:31,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:31,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (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 22:02:31,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:31,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:31,499 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:31,499 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:31,499 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:31,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:31,500 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:31,501 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:31,501 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:31,502 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:33,049 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:33,053 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:33,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:33 BoogieIcfgContainer [2019-10-14 22:02:33,055 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:33,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:33,057 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:33,061 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:33,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:30" (1/3) ... [2019-10-14 22:02:33,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46055a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:33, skipping insertion in model container [2019-10-14 22:02:33,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:31" (2/3) ... [2019-10-14 22:02:33,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46055a20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:33, skipping insertion in model container [2019-10-14 22:02:33,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:33" (3/3) ... [2019-10-14 22:02:33,069 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label54.c [2019-10-14 22:02:33,082 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:33,091 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:33,103 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:33,135 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:33,136 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:33,136 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:33,136 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:33,136 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:33,137 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:33,137 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:33,137 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:33,173 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:33,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-14 22:02:33,180 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:33,181 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:33,183 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 856083907, now seen corresponding path program 1 times [2019-10-14 22:02:33,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:33,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305260878] [2019-10-14 22:02:33,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,549 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 22:02:33,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305260878] [2019-10-14 22:02:33,551 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:33,552 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 22:02:33,552 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173223616] [2019-10-14 22:02:33,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 22:02:33,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:33,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 22:02:33,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 22:02:33,581 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 4 states. [2019-10-14 22:02:35,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:35,528 INFO L93 Difference]: Finished difference Result 714 states and 1256 transitions. [2019-10-14 22:02:35,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 22:02:35,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-10-14 22:02:35,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:35,548 INFO L225 Difference]: With dead ends: 714 [2019-10-14 22:02:35,548 INFO L226 Difference]: Without dead ends: 380 [2019-10-14 22:02:35,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2019-10-14 22:02:35,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 376. [2019-10-14 22:02:35,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2019-10-14 22:02:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 528 transitions. [2019-10-14 22:02:35,634 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 528 transitions. Word has length 12 [2019-10-14 22:02:35,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:35,635 INFO L462 AbstractCegarLoop]: Abstraction has 376 states and 528 transitions. [2019-10-14 22:02:35,636 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 22:02:35,636 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 528 transitions. [2019-10-14 22:02:35,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-14 22:02:35,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:35,642 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:35,643 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:35,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:35,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1019209391, now seen corresponding path program 1 times [2019-10-14 22:02:35,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:35,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905481039] [2019-10-14 22:02:35,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:35,645 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:36,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905481039] [2019-10-14 22:02:36,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285103831] [2019-10-14 22:02:36,012 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 22:02:36,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:36,084 INFO L256 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:36,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:36,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:36,150 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:36,151 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:36,151 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203861186] [2019-10-14 22:02:36,153 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:36,153 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:36,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:36,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:36,154 INFO L87 Difference]: Start difference. First operand 376 states and 528 transitions. Second operand 3 states. [2019-10-14 22:02:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:37,161 INFO L93 Difference]: Finished difference Result 1114 states and 1580 transitions. [2019-10-14 22:02:37,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:37,166 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-10-14 22:02:37,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:37,172 INFO L225 Difference]: With dead ends: 1114 [2019-10-14 22:02:37,173 INFO L226 Difference]: Without dead ends: 744 [2019-10-14 22:02:37,174 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:37,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2019-10-14 22:02:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2019-10-14 22:02:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 744 states. [2019-10-14 22:02:37,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 975 transitions. [2019-10-14 22:02:37,235 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 975 transitions. Word has length 95 [2019-10-14 22:02:37,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:37,236 INFO L462 AbstractCegarLoop]: Abstraction has 744 states and 975 transitions. [2019-10-14 22:02:37,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:37,237 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 975 transitions. [2019-10-14 22:02:37,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2019-10-14 22:02:37,245 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:37,245 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:37,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:37,447 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -788431111, now seen corresponding path program 1 times [2019-10-14 22:02:37,449 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:37,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683734253] [2019-10-14 22:02:37,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:37,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:37,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:37,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:37,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683734253] [2019-10-14 22:02:37,668 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810806642] [2019-10-14 22:02:37,669 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 22:02:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:37,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:37,768 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:37,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:37,857 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:37,857 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:37,857 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 22:02:37,858 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254355675] [2019-10-14 22:02:37,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:37,859 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:37,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:37,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:02:37,860 INFO L87 Difference]: Start difference. First operand 744 states and 975 transitions. Second operand 5 states. [2019-10-14 22:02:39,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:39,370 INFO L93 Difference]: Finished difference Result 1874 states and 2429 transitions. [2019-10-14 22:02:39,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:39,371 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2019-10-14 22:02:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:39,378 INFO L225 Difference]: With dead ends: 1874 [2019-10-14 22:02:39,379 INFO L226 Difference]: Without dead ends: 1136 [2019-10-14 22:02:39,382 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:02:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1136 states. [2019-10-14 22:02:39,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1136 to 1120. [2019-10-14 22:02:39,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1120 states. [2019-10-14 22:02:39,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1401 transitions. [2019-10-14 22:02:39,428 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1401 transitions. Word has length 107 [2019-10-14 22:02:39,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:39,429 INFO L462 AbstractCegarLoop]: Abstraction has 1120 states and 1401 transitions. [2019-10-14 22:02:39,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:39,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1401 transitions. [2019-10-14 22:02:39,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 22:02:39,432 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:39,432 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 22:02:39,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:39,636 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1112900547, now seen corresponding path program 1 times [2019-10-14 22:02:39,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:39,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092782667] [2019-10-14 22:02:39,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:39,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:39,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092782667] [2019-10-14 22:02:39,825 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526599286] [2019-10-14 22:02:39,825 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 22:02:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:39,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:39,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:39,925 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:39,926 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:39,927 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:39,928 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843230280] [2019-10-14 22:02:39,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:39,930 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:39,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:39,931 INFO L87 Difference]: Start difference. First operand 1120 states and 1401 transitions. Second operand 3 states. [2019-10-14 22:02:40,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:40,866 INFO L93 Difference]: Finished difference Result 1308 states and 1718 transitions. [2019-10-14 22:02:40,867 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:40,867 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 121 [2019-10-14 22:02:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:40,874 INFO L225 Difference]: With dead ends: 1308 [2019-10-14 22:02:40,874 INFO L226 Difference]: Without dead ends: 1306 [2019-10-14 22:02:40,875 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:40,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2019-10-14 22:02:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1306. [2019-10-14 22:02:40,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1306 states. [2019-10-14 22:02:40,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 1716 transitions. [2019-10-14 22:02:40,916 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 1716 transitions. Word has length 121 [2019-10-14 22:02:40,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:40,917 INFO L462 AbstractCegarLoop]: Abstraction has 1306 states and 1716 transitions. [2019-10-14 22:02:40,917 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:40,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 1716 transitions. [2019-10-14 22:02:40,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 22:02:40,921 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:40,921 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:41,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:41,125 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:41,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:41,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1321617802, now seen corresponding path program 1 times [2019-10-14 22:02:41,127 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:41,127 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267640016] [2019-10-14 22:02:41,127 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,128 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:41,128 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:02:41,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267640016] [2019-10-14 22:02:41,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511543872] [2019-10-14 22:02:41,372 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 22:02:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:41,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:41,460 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 22:02:41,535 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:41,536 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2019-10-14 22:02:41,536 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365391489] [2019-10-14 22:02:41,538 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:41,538 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:41,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:41,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2019-10-14 22:02:41,539 INFO L87 Difference]: Start difference. First operand 1306 states and 1716 transitions. Second operand 5 states. [2019-10-14 22:02:42,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:42,888 INFO L93 Difference]: Finished difference Result 3210 states and 4493 transitions. [2019-10-14 22:02:42,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:42,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 177 [2019-10-14 22:02:42,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:42,906 INFO L225 Difference]: With dead ends: 3210 [2019-10-14 22:02:42,907 INFO L226 Difference]: Without dead ends: 1910 [2019-10-14 22:02:42,911 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 177 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 22:02:42,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1910 states. [2019-10-14 22:02:42,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1910 to 1874. [2019-10-14 22:02:42,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1874 states. [2019-10-14 22:02:42,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1874 states to 1874 states and 2458 transitions. [2019-10-14 22:02:42,994 INFO L78 Accepts]: Start accepts. Automaton has 1874 states and 2458 transitions. Word has length 177 [2019-10-14 22:02:42,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:42,994 INFO L462 AbstractCegarLoop]: Abstraction has 1874 states and 2458 transitions. [2019-10-14 22:02:42,995 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:42,995 INFO L276 IsEmpty]: Start isEmpty. Operand 1874 states and 2458 transitions. [2019-10-14 22:02:42,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-14 22:02:42,998 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:42,998 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:43,202 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:43,203 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:43,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:43,204 INFO L82 PathProgramCache]: Analyzing trace with hash 740914162, now seen corresponding path program 1 times [2019-10-14 22:02:43,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:43,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203608333] [2019-10-14 22:02:43,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:43,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:43,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,087 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:44,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203608333] [2019-10-14 22:02:44,088 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763702187] [2019-10-14 22:02:44,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 22:02:44,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:44,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:44,177 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:44,262 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 41 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:44,412 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:44,412 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 16 [2019-10-14 22:02:44,412 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226309662] [2019-10-14 22:02:44,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:44,413 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:44,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:44,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:44,414 INFO L87 Difference]: Start difference. First operand 1874 states and 2458 transitions. Second operand 16 states. [2019-10-14 22:02:47,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:47,822 INFO L93 Difference]: Finished difference Result 3876 states and 5103 transitions. [2019-10-14 22:02:47,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 22:02:47,822 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 191 [2019-10-14 22:02:47,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:47,833 INFO L225 Difference]: With dead ends: 3876 [2019-10-14 22:02:47,833 INFO L226 Difference]: Without dead ends: 1961 [2019-10-14 22:02:47,839 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2019-10-14 22:02:47,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2019-10-14 22:02:47,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1876. [2019-10-14 22:02:47,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1876 states. [2019-10-14 22:02:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 2254 transitions. [2019-10-14 22:02:47,901 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 2254 transitions. Word has length 191 [2019-10-14 22:02:47,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:47,901 INFO L462 AbstractCegarLoop]: Abstraction has 1876 states and 2254 transitions. [2019-10-14 22:02:47,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:47,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 2254 transitions. [2019-10-14 22:02:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-10-14 22:02:47,904 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:47,905 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:48,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:48,109 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:48,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:48,110 INFO L82 PathProgramCache]: Analyzing trace with hash -284080629, now seen corresponding path program 1 times [2019-10-14 22:02:48,110 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:48,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509211410] [2019-10-14 22:02:48,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:48,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:48,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,446 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:48,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509211410] [2019-10-14 22:02:48,447 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445559642] [2019-10-14 22:02:48,448 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 22:02:48,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:48,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:48,574 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:48,627 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2019-10-14 22:02:48,628 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:48,628 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:48,629 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146608860] [2019-10-14 22:02:48,630 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:48,630 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:48,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:48,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:48,631 INFO L87 Difference]: Start difference. First operand 1876 states and 2254 transitions. Second operand 3 states. [2019-10-14 22:02:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:49,307 INFO L93 Difference]: Finished difference Result 4668 states and 5584 transitions. [2019-10-14 22:02:49,308 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:49,308 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 194 [2019-10-14 22:02:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:49,323 INFO L225 Difference]: With dead ends: 4668 [2019-10-14 22:02:49,323 INFO L226 Difference]: Without dead ends: 2614 [2019-10-14 22:02:49,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:49,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2614 states. [2019-10-14 22:02:49,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2614 to 2060. [2019-10-14 22:02:49,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2060 states. [2019-10-14 22:02:49,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2060 states to 2060 states and 2436 transitions. [2019-10-14 22:02:49,392 INFO L78 Accepts]: Start accepts. Automaton has 2060 states and 2436 transitions. Word has length 194 [2019-10-14 22:02:49,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:49,392 INFO L462 AbstractCegarLoop]: Abstraction has 2060 states and 2436 transitions. [2019-10-14 22:02:49,392 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2060 states and 2436 transitions. [2019-10-14 22:02:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2019-10-14 22:02:49,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:49,396 INFO L380 BasicCegarLoop]: trace histogram [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, 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] [2019-10-14 22:02:49,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:49,600 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash 2108772671, now seen corresponding path program 1 times [2019-10-14 22:02:49,601 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:49,601 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357891168] [2019-10-14 22:02:49,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,604 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:49,604 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,573 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:50,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357891168] [2019-10-14 22:02:50,573 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318675760] [2019-10-14 22:02:50,574 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 22:02:50,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,660 INFO L256 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:50,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:50,713 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:50,778 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 22:02:50,778 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:50,779 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [18] total 21 [2019-10-14 22:02:50,779 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435554057] [2019-10-14 22:02:50,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:50,780 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:50,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:50,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:02:50,780 INFO L87 Difference]: Start difference. First operand 2060 states and 2436 transitions. Second operand 5 states. [2019-10-14 22:02:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:51,859 INFO L93 Difference]: Finished difference Result 4326 states and 5285 transitions. [2019-10-14 22:02:51,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:51,859 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 216 [2019-10-14 22:02:51,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:51,870 INFO L225 Difference]: With dead ends: 4326 [2019-10-14 22:02:51,871 INFO L226 Difference]: Without dead ends: 2638 [2019-10-14 22:02:51,876 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2019-10-14 22:02:51,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2638 states. [2019-10-14 22:02:51,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2638 to 2452. [2019-10-14 22:02:51,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2452 states. [2019-10-14 22:02:51,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2452 states to 2452 states and 2908 transitions. [2019-10-14 22:02:51,932 INFO L78 Accepts]: Start accepts. Automaton has 2452 states and 2908 transitions. Word has length 216 [2019-10-14 22:02:51,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:51,933 INFO L462 AbstractCegarLoop]: Abstraction has 2452 states and 2908 transitions. [2019-10-14 22:02:51,933 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2452 states and 2908 transitions. [2019-10-14 22:02:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-10-14 22:02:51,938 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:51,938 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:52,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:52,143 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:52,144 INFO L82 PathProgramCache]: Analyzing trace with hash 84824594, now seen corresponding path program 1 times [2019-10-14 22:02:52,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:52,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594637929] [2019-10-14 22:02:52,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:52,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:52,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,886 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 119 proven. 100 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2019-10-14 22:02:52,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594637929] [2019-10-14 22:02:52,887 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276584168] [2019-10-14 22:02:52,887 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 22:02:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:52,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:52,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:53,105 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2019-10-14 22:02:53,105 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:53,105 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 22:02:53,106 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880682411] [2019-10-14 22:02:53,107 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:02:53,107 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:53,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:02:53,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:02:53,107 INFO L87 Difference]: Start difference. First operand 2452 states and 2908 transitions. Second operand 13 states. [2019-10-14 22:02:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:56,944 INFO L93 Difference]: Finished difference Result 4742 states and 5734 transitions. [2019-10-14 22:02:56,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 22:02:56,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 326 [2019-10-14 22:02:56,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:56,955 INFO L225 Difference]: With dead ends: 4742 [2019-10-14 22:02:56,956 INFO L226 Difference]: Without dead ends: 2478 [2019-10-14 22:02:56,962 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 353 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=306, Invalid=1176, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 22:02:56,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2478 states. [2019-10-14 22:02:57,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2478 to 2458. [2019-10-14 22:02:57,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2458 states. [2019-10-14 22:02:57,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2458 states to 2458 states and 2826 transitions. [2019-10-14 22:02:57,017 INFO L78 Accepts]: Start accepts. Automaton has 2458 states and 2826 transitions. Word has length 326 [2019-10-14 22:02:57,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:57,018 INFO L462 AbstractCegarLoop]: Abstraction has 2458 states and 2826 transitions. [2019-10-14 22:02:57,018 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:02:57,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2458 states and 2826 transitions. [2019-10-14 22:02:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 405 [2019-10-14 22:02:57,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:57,026 INFO L380 BasicCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:57,230 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:57,231 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:57,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:57,238 INFO L82 PathProgramCache]: Analyzing trace with hash -1745249514, now seen corresponding path program 1 times [2019-10-14 22:02:57,238 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:57,240 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963925775] [2019-10-14 22:02:57,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:57,240 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:57,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,694 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 22:02:57,694 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963925775] [2019-10-14 22:02:57,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796309529] [2019-10-14 22:02:57,695 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 22:02:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:57,815 INFO L256 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:57,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:57,957 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:57,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 22:02:57,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936746137] [2019-10-14 22:02:57,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:57,961 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:57,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:57,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:57,961 INFO L87 Difference]: Start difference. First operand 2458 states and 2826 transitions. Second operand 3 states. [2019-10-14 22:02:58,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:58,610 INFO L93 Difference]: Finished difference Result 3188 states and 3662 transitions. [2019-10-14 22:02:58,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:58,610 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 404 [2019-10-14 22:02:58,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:58,622 INFO L225 Difference]: With dead ends: 3188 [2019-10-14 22:02:58,622 INFO L226 Difference]: Without dead ends: 3186 [2019-10-14 22:02:58,624 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-14 22:02:58,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3186 states. [2019-10-14 22:02:58,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3186 to 2640. [2019-10-14 22:02:58,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2640 states. [2019-10-14 22:02:58,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2640 states to 2640 states and 3032 transitions. [2019-10-14 22:02:58,678 INFO L78 Accepts]: Start accepts. Automaton has 2640 states and 3032 transitions. Word has length 404 [2019-10-14 22:02:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:58,679 INFO L462 AbstractCegarLoop]: Abstraction has 2640 states and 3032 transitions. [2019-10-14 22:02:58,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2640 states and 3032 transitions. [2019-10-14 22:02:58,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2019-10-14 22:02:58,687 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:58,687 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 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] [2019-10-14 22:02:58,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:58,892 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:58,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:58,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1452112011, now seen corresponding path program 1 times [2019-10-14 22:02:58,893 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:58,893 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405335539] [2019-10-14 22:02:58,893 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:58,894 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:58,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 297 proven. 6 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2019-10-14 22:02:59,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405335539] [2019-10-14 22:02:59,734 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385389769] [2019-10-14 22:02:59,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:59,850 INFO L256 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:59,860 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:59,888 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:03:00,109 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 271 trivial. 0 not checked. [2019-10-14 22:03:00,110 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:00,110 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:03:00,110 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616816766] [2019-10-14 22:03:00,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:03:00,111 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:00,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:03:00,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:03:00,111 INFO L87 Difference]: Start difference. First operand 2640 states and 3032 transitions. Second operand 12 states. [2019-10-14 22:03:02,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:02,244 INFO L93 Difference]: Finished difference Result 5171 states and 5994 transitions. [2019-10-14 22:03:02,244 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 22:03:02,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 410 [2019-10-14 22:03:02,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:02,256 INFO L225 Difference]: With dead ends: 5171 [2019-10-14 22:03:02,257 INFO L226 Difference]: Without dead ends: 2862 [2019-10-14 22:03:02,262 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 428 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2019-10-14 22:03:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2862 states. [2019-10-14 22:03:02,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2862 to 2638. [2019-10-14 22:03:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2638 states. [2019-10-14 22:03:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 2927 transitions. [2019-10-14 22:03:02,321 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 2927 transitions. Word has length 410 [2019-10-14 22:03:02,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:02,322 INFO L462 AbstractCegarLoop]: Abstraction has 2638 states and 2927 transitions. [2019-10-14 22:03:02,322 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:03:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 2927 transitions. [2019-10-14 22:03:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2019-10-14 22:03:02,334 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:02,335 INFO L380 BasicCegarLoop]: trace histogram [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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:02,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:02,539 INFO L410 AbstractCegarLoop]: === Iteration 12 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:02,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:02,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1127836591, now seen corresponding path program 1 times [2019-10-14 22:03:02,541 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:02,541 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670498485] [2019-10-14 22:03:02,541 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,542 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:02,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,177 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2019-10-14 22:03:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 389 proven. 8 refuted. 0 times theorem prover too weak. 533 trivial. 0 not checked. [2019-10-14 22:03:04,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670498485] [2019-10-14 22:03:04,677 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624880876] [2019-10-14 22:03:04,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:04,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:04,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 800 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:03:04,928 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:04,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:03:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 600 proven. 2 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 22:03:05,437 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:05,438 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:03:05,438 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19423266] [2019-10-14 22:03:05,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:03:05,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:05,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:03:05,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:03:05,440 INFO L87 Difference]: Start difference. First operand 2638 states and 2927 transitions. Second operand 17 states.