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/Problem10_label43.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:57:41,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:57:41,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:57:41,444 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:57:41,445 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:57:41,447 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:57:41,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:57:41,457 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:57:41,461 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:57:41,464 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:57:41,466 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:57:41,467 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:57:41,467 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:57:41,469 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:57:41,471 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:57:41,472 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:57:41,474 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:57:41,474 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:57:41,476 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:57:41,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:57:41,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:57:41,488 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:57:41,490 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:57:41,491 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:57:41,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:57:41,498 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:57:41,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:57:41,499 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:57:41,500 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:57:41,501 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:57:41,502 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:57:41,502 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:57:41,503 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:57:41,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:57:41,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:57:41,505 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:57:41,506 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 21:57:41,539 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:57:41,539 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:57:41,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:57:41,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:57:41,543 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:57:41,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:57:41,544 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:57:41,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:57:41,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:57:41,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:57:41,545 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:57:41,545 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:57:41,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:57:41,545 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:57:41,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:57:41,546 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:57:41,546 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:57:41,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:57:41,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:57:41,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:57:41,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:57:41,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:57:41,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:57:41,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:57:41,547 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:57:41,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:57:41,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:57:41,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:57:41,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:57:41,841 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:57:41,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:57:41,858 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:57:41,860 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:57:41,860 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:57:41,861 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label43.c [2019-10-14 21:57:41,938 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbca9f7d6/a6560ca5905543e1bc5e873e0a79f846/FLAGda549146e [2019-10-14 21:57:42,484 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:57:42,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label43.c [2019-10-14 21:57:42,508 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbca9f7d6/a6560ca5905543e1bc5e873e0a79f846/FLAGda549146e [2019-10-14 21:57:42,776 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dbca9f7d6/a6560ca5905543e1bc5e873e0a79f846 [2019-10-14 21:57:42,787 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:57:42,789 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:57:42,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:42,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:57:42,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:57:42,797 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:42" (1/1) ... [2019-10-14 21:57:42,800 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac730e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:42, skipping insertion in model container [2019-10-14 21:57:42,800 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:57:42" (1/1) ... [2019-10-14 21:57:42,809 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:57:42,870 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:57:43,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:43,513 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:57:43,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:57:43,651 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:57:43,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43 WrapperNode [2019-10-14 21:57:43,653 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:57:43,654 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:57:43,654 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:57:43,654 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:57:43,666 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,695 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,731 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,774 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (1/1) ... [2019-10-14 21:57:43,797 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:57:43,798 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:57:43,801 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:57:43,801 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:57:43,802 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (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 21:57:43,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:57:43,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:57:43,888 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:57:43,889 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:57:43,889 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:57:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:57:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:57:43,890 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:57:43,891 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:57:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:57:43,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:57:45,275 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:57:45,275 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:57:45,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:45 BoogieIcfgContainer [2019-10-14 21:57:45,277 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:57:45,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:57:45,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:57:45,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:57:45,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:57:42" (1/3) ... [2019-10-14 21:57:45,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b65858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:45, skipping insertion in model container [2019-10-14 21:57:45,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:57:43" (2/3) ... [2019-10-14 21:57:45,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29b65858 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:57:45, skipping insertion in model container [2019-10-14 21:57:45,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:57:45" (3/3) ... [2019-10-14 21:57:45,288 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label43.c [2019-10-14 21:57:45,300 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:57:45,311 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:57:45,324 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:57:45,362 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:57:45,363 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:57:45,363 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:57:45,363 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:57:45,363 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:57:45,364 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:57:45,364 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:57:45,364 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:57:45,396 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-14 21:57:45,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 21:57:45,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:45,409 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:57:45,411 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:45,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:45,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1136502142, now seen corresponding path program 1 times [2019-10-14 21:57:45,429 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:45,429 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822095127] [2019-10-14 21:57:45,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:45,430 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:45,430 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:45,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:45,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:45,865 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 21:57:45,866 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822095127] [2019-10-14 21:57:45,867 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:57:45,867 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:57:45,868 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571247914] [2019-10-14 21:57:45,874 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:57:45,875 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:45,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:57:45,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:57:45,894 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 5 states. [2019-10-14 21:57:48,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:57:48,081 INFO L93 Difference]: Finished difference Result 730 states and 1300 transitions. [2019-10-14 21:57:48,081 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:57:48,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-10-14 21:57:48,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:57:48,101 INFO L225 Difference]: With dead ends: 730 [2019-10-14 21:57:48,101 INFO L226 Difference]: Without dead ends: 447 [2019-10-14 21:57:48,109 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:57:48,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2019-10-14 21:57:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 443. [2019-10-14 21:57:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2019-10-14 21:57:48,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 595 transitions. [2019-10-14 21:57:48,195 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 595 transitions. Word has length 41 [2019-10-14 21:57:48,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:57:48,196 INFO L462 AbstractCegarLoop]: Abstraction has 443 states and 595 transitions. [2019-10-14 21:57:48,196 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:57:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 595 transitions. [2019-10-14 21:57:48,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-14 21:57:48,202 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:57:48,203 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:57:48,203 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:57:48,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:57:48,204 INFO L82 PathProgramCache]: Analyzing trace with hash -430353343, now seen corresponding path program 1 times [2019-10-14 21:57:48,204 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:57:48,204 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626071546] [2019-10-14 21:57:48,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:48,205 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:57:48,205 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:57:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:48,632 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626071546] [2019-10-14 21:57:48,633 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790975738] [2019-10-14 21:57:48,633 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 21:57:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:57:48,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:57:48,737 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:57:48,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:48,851 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:57:56,980 WARN L191 SmtUtils]: Spent 8.08 s on a formula simplification that was a NOOP. DAG size: 33 [2019-10-14 21:57:57,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:57,156 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 21:57:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:57:57,239 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:57:57,239 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2019-10-14 21:57:57,239 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890042228] [2019-10-14 21:57:57,243 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 21:57:57,243 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:57:57,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 21:57:57,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:57:57,244 INFO L87 Difference]: Start difference. First operand 443 states and 595 transitions. Second operand 14 states. [2019-10-14 21:58:19,400 WARN L191 SmtUtils]: Spent 19.54 s on a formula simplification. DAG size of input: 37 DAG size of output: 37 [2019-10-14 21:58:27,122 WARN L191 SmtUtils]: Spent 7.44 s on a formula simplification that was a NOOP. DAG size: 43