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/Problem15_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:03:16,521 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:03:16,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:03:16,544 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:03:16,544 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:03:16,547 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:03:16,549 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:03:16,558 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:03:16,561 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:03:16,562 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:03:16,563 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:03:16,564 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:03:16,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:03:16,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:03:16,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:03:16,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:03:16,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:03:16,569 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:03:16,570 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:03:16,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:03:16,574 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:03:16,575 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:03:16,576 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:03:16,577 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:03:16,579 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:03:16,581 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:03:16,582 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:03:16,583 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:03:16,583 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:03:16,584 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:03:16,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:03:16,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:03:16,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:03:16,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:03:16,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:03:16,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:03:16,588 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 22:03:16,612 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:03:16,613 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:03:16,614 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:03:16,614 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:03:16,614 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:03:16,615 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:03:16,615 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:03:16,615 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:03:16,615 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:03:16,615 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:03:16,616 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:03:16,616 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:03:16,616 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:03:16,616 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:03:16,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:03:16,617 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:03:16,617 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:03:16,617 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:03:16,621 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:03:16,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:03:16,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:03:16,622 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:03:16,622 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:03:16,622 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:03:16,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:03:16,623 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:03:16,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:03:16,623 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:03:16,623 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:03:16,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:03:16,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:03:16,943 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:03:16,945 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:03:16,945 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:03:16,946 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-10-14 22:03:17,034 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03b40f301/8558f3aa675e4245978b0888e82521ad/FLAG353c41026 [2019-10-14 22:03:17,750 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:03:17,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label44.c [2019-10-14 22:03:17,771 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03b40f301/8558f3aa675e4245978b0888e82521ad/FLAG353c41026 [2019-10-14 22:03:17,959 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03b40f301/8558f3aa675e4245978b0888e82521ad [2019-10-14 22:03:17,968 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:03:17,969 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:03:17,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:17,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:03:17,974 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:03:17,975 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:17" (1/1) ... [2019-10-14 22:03:17,978 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e7d367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:17, skipping insertion in model container [2019-10-14 22:03:17,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:03:17" (1/1) ... [2019-10-14 22:03:17,986 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:03:18,060 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:03:18,997 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:19,006 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:03:19,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:03:19,316 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:03:19,317 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19 WrapperNode [2019-10-14 22:03:19,317 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:03:19,318 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:03:19,318 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:03:19,318 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:03:19,333 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,334 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,380 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,468 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,489 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (1/1) ... [2019-10-14 22:03:19,512 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:03:19,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:03:19,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:03:19,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:03:19,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (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 22:03:19,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:03:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:03:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:03:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:03:19,576 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:03:19,576 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:03:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:03:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:03:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:03:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:03:19,577 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:03:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:03:19,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:03:23,161 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:03:23,161 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:03:23,163 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:23 BoogieIcfgContainer [2019-10-14 22:03:23,163 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:03:23,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:03:23,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:03:23,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:03:23,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:03:17" (1/3) ... [2019-10-14 22:03:23,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbbefc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:23, skipping insertion in model container [2019-10-14 22:03:23,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:03:19" (2/3) ... [2019-10-14 22:03:23,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbbefc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:03:23, skipping insertion in model container [2019-10-14 22:03:23,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:03:23" (3/3) ... [2019-10-14 22:03:23,171 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label44.c [2019-10-14 22:03:23,181 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:03:23,190 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:03:23,202 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:03:23,233 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:03:23,234 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:03:23,234 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:03:23,234 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:03:23,234 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:03:23,234 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:03:23,235 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:03:23,235 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:03:23,265 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:03:23,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-10-14 22:03:23,276 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:23,277 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:23,279 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:23,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:23,286 INFO L82 PathProgramCache]: Analyzing trace with hash 1323114568, now seen corresponding path program 1 times [2019-10-14 22:03:23,296 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:23,297 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046884881] [2019-10-14 22:03:23,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:23,297 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:23,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:23,815 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 22:03:23,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046884881] [2019-10-14 22:03:23,817 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:03:23,817 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:03:23,818 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631500740] [2019-10-14 22:03:23,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:23,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:23,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:03:23,842 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:30,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:30,513 INFO L93 Difference]: Finished difference Result 1513 states and 2781 transitions. [2019-10-14 22:03:30,514 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:30,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2019-10-14 22:03:30,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:30,541 INFO L225 Difference]: With dead ends: 1513 [2019-10-14 22:03:30,541 INFO L226 Difference]: Without dead ends: 1007 [2019-10-14 22:03:30,558 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:30,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2019-10-14 22:03:30,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 999. [2019-10-14 22:03:30,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 999 states. [2019-10-14 22:03:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 1377 transitions. [2019-10-14 22:03:30,680 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 1377 transitions. Word has length 72 [2019-10-14 22:03:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:30,681 INFO L462 AbstractCegarLoop]: Abstraction has 999 states and 1377 transitions. [2019-10-14 22:03:30,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:30,682 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 1377 transitions. [2019-10-14 22:03:30,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:03:30,690 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:30,690 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:30,690 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:30,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:30,691 INFO L82 PathProgramCache]: Analyzing trace with hash 380539372, now seen corresponding path program 1 times [2019-10-14 22:03:30,691 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:30,692 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097728980] [2019-10-14 22:03:30,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:30,692 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:30,692 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:30,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:30,999 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 64 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:31,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097728980] [2019-10-14 22:03:31,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193380245] [2019-10-14 22:03:31,000 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 22:03:31,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:31,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:31,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:31,220 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:31,221 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:31,221 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149595966] [2019-10-14 22:03:31,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:31,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:31,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:31,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:31,227 INFO L87 Difference]: Start difference. First operand 999 states and 1377 transitions. Second operand 3 states. [2019-10-14 22:03:33,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:33,629 INFO L93 Difference]: Finished difference Result 2620 states and 3685 transitions. [2019-10-14 22:03:33,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:33,630 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 141 [2019-10-14 22:03:33,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:33,639 INFO L225 Difference]: With dead ends: 2620 [2019-10-14 22:03:33,639 INFO L226 Difference]: Without dead ends: 1627 [2019-10-14 22:03:33,642 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2019-10-14 22:03:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1625. [2019-10-14 22:03:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1625 states. [2019-10-14 22:03:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1625 states to 1625 states and 2077 transitions. [2019-10-14 22:03:33,700 INFO L78 Accepts]: Start accepts. Automaton has 1625 states and 2077 transitions. Word has length 141 [2019-10-14 22:03:33,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:33,700 INFO L462 AbstractCegarLoop]: Abstraction has 1625 states and 2077 transitions. [2019-10-14 22:03:33,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:33,701 INFO L276 IsEmpty]: Start isEmpty. Operand 1625 states and 2077 transitions. [2019-10-14 22:03:33,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-10-14 22:03:33,708 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:33,708 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:33,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:33,913 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:33,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:33,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2044450927, now seen corresponding path program 1 times [2019-10-14 22:03:33,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:33,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60637269] [2019-10-14 22:03:33,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:33,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:33,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:33,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:34,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:34,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 131 proven. 73 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:03:34,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60637269] [2019-10-14 22:03:34,372 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270404334] [2019-10-14 22:03:34,373 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 22:03:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:34,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 22:03:34,486 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:34,733 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2019-10-14 22:03:34,734 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:34,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2019-10-14 22:03:34,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117169221] [2019-10-14 22:03:34,737 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 22:03:34,738 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:34,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 22:03:34,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2019-10-14 22:03:34,739 INFO L87 Difference]: Start difference. First operand 1625 states and 2077 transitions. Second operand 13 states. [2019-10-14 22:03:53,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:53,646 INFO L93 Difference]: Finished difference Result 8762 states and 11770 transitions. [2019-10-14 22:03:53,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-10-14 22:03:53,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 246 [2019-10-14 22:03:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:53,691 INFO L225 Difference]: With dead ends: 8762 [2019-10-14 22:03:53,691 INFO L226 Difference]: Without dead ends: 7143 [2019-10-14 22:03:53,700 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=680, Invalid=3742, Unknown=0, NotChecked=0, Total=4422 [2019-10-14 22:03:53,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7143 states. [2019-10-14 22:03:53,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7143 to 7027. [2019-10-14 22:03:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7027 states. [2019-10-14 22:03:54,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7027 states to 7027 states and 8357 transitions. [2019-10-14 22:03:54,026 INFO L78 Accepts]: Start accepts. Automaton has 7027 states and 8357 transitions. Word has length 246 [2019-10-14 22:03:54,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:54,028 INFO L462 AbstractCegarLoop]: Abstraction has 7027 states and 8357 transitions. [2019-10-14 22:03:54,028 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 22:03:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 7027 states and 8357 transitions. [2019-10-14 22:03:54,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-10-14 22:03:54,037 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:54,038 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:54,242 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:54,243 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:54,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:54,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1548290639, now seen corresponding path program 1 times [2019-10-14 22:03:54,244 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:54,244 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445109875] [2019-10-14 22:03:54,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:54,244 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:54,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:54,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 131 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:54,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445109875] [2019-10-14 22:03:54,645 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022210379] [2019-10-14 22:03:54,645 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 22:03:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:54,760 INFO L256 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:54,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:54,934 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:54,934 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:54,934 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:54,935 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201745441] [2019-10-14 22:03:54,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:54,937 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:54,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:54,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:54,938 INFO L87 Difference]: Start difference. First operand 7027 states and 8357 transitions. Second operand 3 states. [2019-10-14 22:03:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:57,521 INFO L93 Difference]: Finished difference Result 16543 states and 20255 transitions. [2019-10-14 22:03:57,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:57,526 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 352 [2019-10-14 22:03:57,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:57,574 INFO L225 Difference]: With dead ends: 16543 [2019-10-14 22:03:57,574 INFO L226 Difference]: Without dead ends: 9829 [2019-10-14 22:03:57,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 357 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9829 states. [2019-10-14 22:03:57,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9829 to 8901. [2019-10-14 22:03:57,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8901 states. [2019-10-14 22:03:57,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8901 states to 8901 states and 10619 transitions. [2019-10-14 22:03:57,839 INFO L78 Accepts]: Start accepts. Automaton has 8901 states and 10619 transitions. Word has length 352 [2019-10-14 22:03:57,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:57,841 INFO L462 AbstractCegarLoop]: Abstraction has 8901 states and 10619 transitions. [2019-10-14 22:03:57,841 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:57,841 INFO L276 IsEmpty]: Start isEmpty. Operand 8901 states and 10619 transitions. [2019-10-14 22:03:57,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2019-10-14 22:03:57,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:57,853 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:03:58,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:58,058 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:58,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:58,059 INFO L82 PathProgramCache]: Analyzing trace with hash 981875081, now seen corresponding path program 1 times [2019-10-14 22:03:58,060 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:58,060 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473805819] [2019-10-14 22:03:58,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:58,060 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:58,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:58,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat