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/Problem03_label38.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:28,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:28,525 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:28,545 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:28,546 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:28,548 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:28,550 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:28,563 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:28,565 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:28,567 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:28,569 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:28,571 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:28,572 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:28,576 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:28,577 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:28,579 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:28,580 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:28,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:28,585 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:28,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:28,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:28,591 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:28,592 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:28,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:28,595 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:28,598 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:28,599 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:28,600 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:28,600 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:28,601 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:28,602 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:28,602 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:28,603 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:28,603 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:28,604 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:28,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:28,606 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 21:54:28,625 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:28,626 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:28,627 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:28,627 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:28,628 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:28,628 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:28,628 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:28,628 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:28,628 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:28,629 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:28,630 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:28,630 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:28,630 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:28,630 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:28,631 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:28,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:28,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:28,631 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:28,631 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:28,632 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:28,632 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:28,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:28,632 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:28,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:28,903 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:28,921 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:28,925 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:28,927 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:28,927 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:28,928 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-14 21:54:29,008 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf89fb4c/36e362be120a4ff0a6b31c3af6363a40/FLAGd36cddd8c [2019-10-14 21:54:29,720 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:29,721 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label38.c [2019-10-14 21:54:29,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf89fb4c/36e362be120a4ff0a6b31c3af6363a40/FLAGd36cddd8c [2019-10-14 21:54:29,856 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bf89fb4c/36e362be120a4ff0a6b31c3af6363a40 [2019-10-14 21:54:29,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:29,867 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:29,868 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:29,868 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:29,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:29,872 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,876 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43009ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:29, skipping insertion in model container [2019-10-14 21:54:29,876 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:29" (1/1) ... [2019-10-14 21:54:29,884 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:29,952 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:30,821 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:30,829 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:31,318 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:31,344 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:31,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31 WrapperNode [2019-10-14 21:54:31,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:31,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:31,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:31,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:31,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,485 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,511 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,525 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (1/1) ... [2019-10-14 21:54:31,537 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:31,538 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:31,538 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:31,538 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:31,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (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 21:54:31,600 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:31,601 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:31,601 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:31,604 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:31,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:33,538 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:33,539 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:33,540 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:33 BoogieIcfgContainer [2019-10-14 21:54:33,540 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:33,542 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:33,542 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:33,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:33,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:29" (1/3) ... [2019-10-14 21:54:33,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7274dd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:33, skipping insertion in model container [2019-10-14 21:54:33,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:31" (2/3) ... [2019-10-14 21:54:33,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7274dd5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:33, skipping insertion in model container [2019-10-14 21:54:33,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:33" (3/3) ... [2019-10-14 21:54:33,549 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label38.c [2019-10-14 21:54:33,559 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:33,567 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:33,579 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:33,608 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:33,608 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:33,609 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:33,609 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:33,609 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:33,609 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:33,609 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:33,609 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:33,637 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:33,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-10-14 21:54:33,655 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:33,656 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:33,658 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:33,665 INFO L82 PathProgramCache]: Analyzing trace with hash -2093619232, now seen corresponding path program 1 times [2019-10-14 21:54:33,674 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:33,674 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458584293] [2019-10-14 21:54:33,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,675 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,545 WARN L191 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:34,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,766 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 21:54:34,767 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458584293] [2019-10-14 21:54:34,769 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:34,769 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:34,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778268274] [2019-10-14 21:54:34,776 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:34,776 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:34,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:34,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:34,793 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:35,000 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:35,461 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:39,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:39,330 INFO L93 Difference]: Finished difference Result 1107 states and 1968 transitions. [2019-10-14 21:54:39,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:39,332 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 207 [2019-10-14 21:54:39,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:39,355 INFO L225 Difference]: With dead ends: 1107 [2019-10-14 21:54:39,355 INFO L226 Difference]: Without dead ends: 699 [2019-10-14 21:54:39,365 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:54:39,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2019-10-14 21:54:39,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 474. [2019-10-14 21:54:39,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 474 states. [2019-10-14 21:54:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 720 transitions. [2019-10-14 21:54:39,454 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 720 transitions. Word has length 207 [2019-10-14 21:54:39,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:39,455 INFO L462 AbstractCegarLoop]: Abstraction has 474 states and 720 transitions. [2019-10-14 21:54:39,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:39,456 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 720 transitions. [2019-10-14 21:54:39,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 21:54:39,463 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:39,463 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:39,463 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1254940916, now seen corresponding path program 1 times [2019-10-14 21:54:39,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:39,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388905710] [2019-10-14 21:54:39,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:39,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,869 WARN L191 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:40,084 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388905710] [2019-10-14 21:54:40,085 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207641935] [2019-10-14 21:54:40,085 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 21:54:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:40,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:40,434 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:40,434 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:54:40,434 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009738127] [2019-10-14 21:54:40,439 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:40,439 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:40,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:40,440 INFO L87 Difference]: Start difference. First operand 474 states and 720 transitions. Second operand 3 states. [2019-10-14 21:54:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:41,615 INFO L93 Difference]: Finished difference Result 1364 states and 2099 transitions. [2019-10-14 21:54:41,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:41,616 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-10-14 21:54:41,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:41,630 INFO L225 Difference]: With dead ends: 1364 [2019-10-14 21:54:41,630 INFO L226 Difference]: Without dead ends: 896 [2019-10-14 21:54:41,633 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:41,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2019-10-14 21:54:41,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 894. [2019-10-14 21:54:41,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 894 states. [2019-10-14 21:54:41,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 1212 transitions. [2019-10-14 21:54:41,689 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 1212 transitions. Word has length 219 [2019-10-14 21:54:41,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:41,690 INFO L462 AbstractCegarLoop]: Abstraction has 894 states and 1212 transitions. [2019-10-14 21:54:41,690 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:41,690 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 1212 transitions. [2019-10-14 21:54:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 21:54:41,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:41,698 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:41,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:41,904 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:41,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:41,905 INFO L82 PathProgramCache]: Analyzing trace with hash 536359495, now seen corresponding path program 1 times [2019-10-14 21:54:41,905 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:41,906 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090640601] [2019-10-14 21:54:41,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:41,906 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:41,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,192 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:42,422 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:42,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090640601] [2019-10-14 21:54:42,422 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:42,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:54:42,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496772191] [2019-10-14 21:54:42,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:54:42,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:42,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:54:42,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:42,425 INFO L87 Difference]: Start difference. First operand 894 states and 1212 transitions. Second operand 9 states. [2019-10-14 21:54:42,591 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:43,171 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:46,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:46,093 INFO L93 Difference]: Finished difference Result 2246 states and 3211 transitions. [2019-10-14 21:54:46,094 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:54:46,095 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 234 [2019-10-14 21:54:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:46,108 INFO L225 Difference]: With dead ends: 2246 [2019-10-14 21:54:46,108 INFO L226 Difference]: Without dead ends: 1358 [2019-10-14 21:54:46,112 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:54:46,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2019-10-14 21:54:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1332. [2019-10-14 21:54:46,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1332 states. [2019-10-14 21:54:46,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 1777 transitions. [2019-10-14 21:54:46,178 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 1777 transitions. Word has length 234 [2019-10-14 21:54:46,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:46,179 INFO L462 AbstractCegarLoop]: Abstraction has 1332 states and 1777 transitions. [2019-10-14 21:54:46,179 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:54:46,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 1777 transitions. [2019-10-14 21:54:46,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-14 21:54:46,204 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:46,205 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:46,205 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:46,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:46,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1119665401, now seen corresponding path program 1 times [2019-10-14 21:54:46,206 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:46,207 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491368070] [2019-10-14 21:54:46,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,207 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:46,207 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:46,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,582 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:46,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:46,868 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:46,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491368070] [2019-10-14 21:54:46,868 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:46,868 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:46,869 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896249617] [2019-10-14 21:54:46,870 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:46,870 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:46,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:46,871 INFO L87 Difference]: Start difference. First operand 1332 states and 1777 transitions. Second operand 8 states. [2019-10-14 21:54:47,020 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:47,569 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:50,634 INFO L93 Difference]: Finished difference Result 4018 states and 5650 transitions. [2019-10-14 21:54:50,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:54:50,637 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 241 [2019-10-14 21:54:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:50,656 INFO L225 Difference]: With dead ends: 4018 [2019-10-14 21:54:50,657 INFO L226 Difference]: Without dead ends: 2692 [2019-10-14 21:54:50,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2692 states. [2019-10-14 21:54:50,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2692 to 2654. [2019-10-14 21:54:50,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-14 21:54:50,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3619 transitions. [2019-10-14 21:54:50,768 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3619 transitions. Word has length 241 [2019-10-14 21:54:50,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:50,768 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3619 transitions. [2019-10-14 21:54:50,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:50,769 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3619 transitions. [2019-10-14 21:54:50,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-14 21:54:50,780 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:50,780 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:50,781 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:50,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:50,781 INFO L82 PathProgramCache]: Analyzing trace with hash -850359650, now seen corresponding path program 1 times [2019-10-14 21:54:50,781 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:50,781 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290262166] [2019-10-14 21:54:50,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:50,782 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:50,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:50,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,036 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 37 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:51,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290262166] [2019-10-14 21:54:51,316 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160615754] [2019-10-14 21:54:51,316 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 21:54:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:51,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 1066 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:51,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:54:51,653 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:51,653 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:54:51,654 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125773003] [2019-10-14 21:54:51,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:51,656 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:51,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:51,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:51,657 INFO L87 Difference]: Start difference. First operand 2654 states and 3619 transitions. Second operand 3 states. [2019-10-14 21:54:52,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:52,650 INFO L93 Difference]: Finished difference Result 5304 states and 7251 transitions. [2019-10-14 21:54:52,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:52,651 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 243 [2019-10-14 21:54:52,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:52,666 INFO L225 Difference]: With dead ends: 5304 [2019-10-14 21:54:52,666 INFO L226 Difference]: Without dead ends: 2656 [2019-10-14 21:54:52,672 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:54:52,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2019-10-14 21:54:52,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2019-10-14 21:54:52,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2654 states. [2019-10-14 21:54:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3493 transitions. [2019-10-14 21:54:52,746 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3493 transitions. Word has length 243 [2019-10-14 21:54:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:52,750 INFO L462 AbstractCegarLoop]: Abstraction has 2654 states and 3493 transitions. [2019-10-14 21:54:52,751 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:52,751 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3493 transitions. [2019-10-14 21:54:52,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2019-10-14 21:54:52,760 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:52,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:52,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:52,965 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:52,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:52,966 INFO L82 PathProgramCache]: Analyzing trace with hash 476797618, now seen corresponding path program 1 times [2019-10-14 21:54:52,966 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:52,967 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683418388] [2019-10-14 21:54:52,967 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,968 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:53,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,314 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:53,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683418388] [2019-10-14 21:54:53,506 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414327598] [2019-10-14 21:54:53,506 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 21:54:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 912 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:53,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:53,911 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:53,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:53,913 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:53,914 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870307530] [2019-10-14 21:54:53,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:53,915 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:53,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:53,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:53,916 INFO L87 Difference]: Start difference. First operand 2654 states and 3493 transitions. Second operand 3 states. [2019-10-14 21:54:55,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:55,346 INFO L93 Difference]: Finished difference Result 7854 states and 10598 transitions. [2019-10-14 21:54:55,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:55,347 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 252 [2019-10-14 21:54:55,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:55,376 INFO L225 Difference]: With dead ends: 7854 [2019-10-14 21:54:55,376 INFO L226 Difference]: Without dead ends: 5206 [2019-10-14 21:54:55,386 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:55,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5206 states. [2019-10-14 21:54:55,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5206 to 5200. [2019-10-14 21:54:55,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5200 states. [2019-10-14 21:54:55,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5200 states to 5200 states and 6852 transitions. [2019-10-14 21:54:55,579 INFO L78 Accepts]: Start accepts. Automaton has 5200 states and 6852 transitions. Word has length 252 [2019-10-14 21:54:55,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:55,580 INFO L462 AbstractCegarLoop]: Abstraction has 5200 states and 6852 transitions. [2019-10-14 21:54:55,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:54:55,580 INFO L276 IsEmpty]: Start isEmpty. Operand 5200 states and 6852 transitions. [2019-10-14 21:54:55,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-10-14 21:54:55,597 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:55,597 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:55,805 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:55,805 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:55,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:55,806 INFO L82 PathProgramCache]: Analyzing trace with hash -944811427, now seen corresponding path program 1 times [2019-10-14 21:54:55,806 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:55,806 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299635569] [2019-10-14 21:54:55,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:55,807 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:55,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:55,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,016 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:56,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:56,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299635569] [2019-10-14 21:54:56,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017920169] [2019-10-14 21:54:56,231 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 21:54:56,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:56,432 INFO L256 TraceCheckSpWp]: Trace formula consists of 1073 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:56,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:56,507 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:54:56,508 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:56,508 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-14 21:54:56,508 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558168562] [2019-10-14 21:54:56,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:56,509 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:56,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:56,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:56,510 INFO L87 Difference]: Start difference. First operand 5200 states and 6852 transitions. Second operand 5 states. [2019-10-14 21:54:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:57,946 INFO L93 Difference]: Finished difference Result 10482 states and 14336 transitions. [2019-10-14 21:54:57,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:57,947 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 258 [2019-10-14 21:54:57,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:57,971 INFO L225 Difference]: With dead ends: 10482 [2019-10-14 21:54:57,971 INFO L226 Difference]: Without dead ends: 5288 [2019-10-14 21:54:57,984 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:54:57,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5288 states. [2019-10-14 21:54:58,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5288 to 5216. [2019-10-14 21:54:58,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5216 states. [2019-10-14 21:54:58,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 6776 transitions. [2019-10-14 21:54:58,125 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 6776 transitions. Word has length 258 [2019-10-14 21:54:58,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:58,126 INFO L462 AbstractCegarLoop]: Abstraction has 5216 states and 6776 transitions. [2019-10-14 21:54:58,126 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:58,126 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 6776 transitions. [2019-10-14 21:54:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-14 21:54:58,145 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:58,145 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:54:58,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:58,350 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:58,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:58,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1466681545, now seen corresponding path program 1 times [2019-10-14 21:54:58,351 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:58,351 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193816222] [2019-10-14 21:54:58,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:58,351 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:58,352 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,545 WARN L191 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,752 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 65 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:54:58,752 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193816222] [2019-10-14 21:54:58,753 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579725949] [2019-10-14 21:54:58,753 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 21:54:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:58,989 INFO L256 TraceCheckSpWp]: Trace formula consists of 1250 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:54:58,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:59,065 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 87 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:54:59,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:59,066 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:59,066 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73915123] [2019-10-14 21:54:59,067 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:59,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:59,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:59,068 INFO L87 Difference]: Start difference. First operand 5216 states and 6776 transitions. Second operand 11 states. [2019-10-14 21:54:59,237 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:59,557 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:55:01,557 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:55:03,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:03,799 INFO L93 Difference]: Finished difference Result 15091 states and 22090 transitions. [2019-10-14 21:55:03,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:03,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 270 [2019-10-14 21:55:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:03,880 INFO L225 Difference]: With dead ends: 15091 [2019-10-14 21:55:03,881 INFO L226 Difference]: Without dead ends: 9881 [2019-10-14 21:55:03,908 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:55:03,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2019-10-14 21:55:04,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 9602. [2019-10-14 21:55:04,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9602 states. [2019-10-14 21:55:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9602 states to 9602 states and 12278 transitions. [2019-10-14 21:55:04,274 INFO L78 Accepts]: Start accepts. Automaton has 9602 states and 12278 transitions. Word has length 270 [2019-10-14 21:55:04,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:04,275 INFO L462 AbstractCegarLoop]: Abstraction has 9602 states and 12278 transitions. [2019-10-14 21:55:04,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:55:04,275 INFO L276 IsEmpty]: Start isEmpty. Operand 9602 states and 12278 transitions. [2019-10-14 21:55:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-10-14 21:55:04,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:04,307 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:55:04,513 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:04,513 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:04,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:04,514 INFO L82 PathProgramCache]: Analyzing trace with hash 507873321, now seen corresponding path program 1 times [2019-10-14 21:55:04,514 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:04,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644595177] [2019-10-14 21:55:04,514 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:04,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,744 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:04,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat