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_label48.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:57,442 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:57,444 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:57,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:57,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:57,463 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:57,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:57,474 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:57,478 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:57,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:57,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:57,485 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:57,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:57,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:57,489 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:57,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:57,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:57,492 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:57,493 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:57,497 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:57,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:57,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:57,506 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:57,507 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:57,509 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:57,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:57,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:57,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:57,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:57,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:57,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:57,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:57,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:57,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:57,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:57,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:57,521 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 21:54:57,546 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:57,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:57,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:57,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:57,548 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:57,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:57,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:57,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:57,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:57,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:57,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:57,549 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:57,549 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:57,550 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:57,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:57,550 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:57,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:57,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:57,550 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:57,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:57,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:57,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:57,551 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:57,551 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:57,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:57,552 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:57,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:57,552 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:57,552 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:57,834 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:57,852 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:57,855 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:57,857 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:57,857 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:57,858 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label48.c [2019-10-14 21:54:57,932 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a46c1e/40c52940d0d44bd493dc4681f2f9e2ad/FLAG2e28d5dcd [2019-10-14 21:54:58,595 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:58,597 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label48.c [2019-10-14 21:54:58,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a46c1e/40c52940d0d44bd493dc4681f2f9e2ad/FLAG2e28d5dcd [2019-10-14 21:54:58,830 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/127a46c1e/40c52940d0d44bd493dc4681f2f9e2ad [2019-10-14 21:54:58,840 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:58,841 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:58,842 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:58,843 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:58,846 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:58,847 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@372c657e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:58, skipping insertion in model container [2019-10-14 21:54:58,850 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:58" (1/1) ... [2019-10-14 21:54:58,857 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:58,945 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:59,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:59,730 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:55:00,157 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:55:00,184 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:55:00,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00 WrapperNode [2019-10-14 21:55:00,185 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:55:00,186 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:55:00,186 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:55:00,186 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:55:00,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,246 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,339 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (1/1) ... [2019-10-14 21:55:00,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:55:00,359 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:55:00,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:55:00,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:55:00,361 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (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 21:55:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:55:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:55:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:55:00,415 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:55:00,416 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:55:00,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:55:02,256 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:55:02,257 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:55:02,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:02 BoogieIcfgContainer [2019-10-14 21:55:02,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:55:02,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:55:02,265 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:55:02,269 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:55:02,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:58" (1/3) ... [2019-10-14 21:55:02,270 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9dc64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:02, skipping insertion in model container [2019-10-14 21:55:02,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:55:00" (2/3) ... [2019-10-14 21:55:02,271 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a9dc64a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:55:02, skipping insertion in model container [2019-10-14 21:55:02,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:55:02" (3/3) ... [2019-10-14 21:55:02,275 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label48.c [2019-10-14 21:55:02,287 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:55:02,299 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:55:02,311 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:55:02,350 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:55:02,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:55:02,350 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:55:02,351 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:55:02,351 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:55:02,351 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:55:02,351 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:55:02,352 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:55:02,389 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:55:02,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-10-14 21:55:02,424 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:02,429 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] [2019-10-14 21:55:02,431 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:02,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:02,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1739867384, now seen corresponding path program 1 times [2019-10-14 21:55:02,449 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:02,449 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399283635] [2019-10-14 21:55:02,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:02,450 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:02,450 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:03,347 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:03,541 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 21:55:03,542 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399283635] [2019-10-14 21:55:03,543 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:03,543 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:55:03,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683472330] [2019-10-14 21:55:03,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:55:03,548 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:03,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:55:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:55:03,564 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:55:03,756 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:04,089 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-14 21:55:07,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:07,762 INFO L93 Difference]: Finished difference Result 1066 states and 1927 transitions. [2019-10-14 21:55:07,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:55:07,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 189 [2019-10-14 21:55:07,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:07,785 INFO L225 Difference]: With dead ends: 1066 [2019-10-14 21:55:07,786 INFO L226 Difference]: Without dead ends: 687 [2019-10-14 21:55:07,794 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:55:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-14 21:55:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 467. [2019-10-14 21:55:07,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2019-10-14 21:55:07,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 730 transitions. [2019-10-14 21:55:07,890 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 730 transitions. Word has length 189 [2019-10-14 21:55:07,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:07,891 INFO L462 AbstractCegarLoop]: Abstraction has 467 states and 730 transitions. [2019-10-14 21:55:07,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:55:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 730 transitions. [2019-10-14 21:55:07,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-10-14 21:55:07,901 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:07,901 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] [2019-10-14 21:55:07,901 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:07,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:07,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1270539508, now seen corresponding path program 1 times [2019-10-14 21:55:07,905 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:07,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660181860] [2019-10-14 21:55:07,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:07,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:08,317 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:08,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:08,459 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:55:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:08,533 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 21:55:08,533 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660181860] [2019-10-14 21:55:08,534 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464878017] [2019-10-14 21:55:08,534 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 21:55:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:08,714 INFO L256 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:08,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:08,877 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 21:55:08,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:08,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:08,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914910744] [2019-10-14 21:55:08,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:08,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:08,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:08,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:08,884 INFO L87 Difference]: Start difference. First operand 467 states and 730 transitions. Second operand 3 states. [2019-10-14 21:55:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:09,890 INFO L93 Difference]: Finished difference Result 1352 states and 2139 transitions. [2019-10-14 21:55:09,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:09,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 201 [2019-10-14 21:55:09,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:09,898 INFO L225 Difference]: With dead ends: 1352 [2019-10-14 21:55:09,898 INFO L226 Difference]: Without dead ends: 891 [2019-10-14 21:55:09,900 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 205 SyntacticMatches, 1 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 21:55:09,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 891 states. [2019-10-14 21:55:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 891 to 889. [2019-10-14 21:55:09,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 889 states. [2019-10-14 21:55:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 1240 transitions. [2019-10-14 21:55:09,950 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 1240 transitions. Word has length 201 [2019-10-14 21:55:09,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:09,951 INFO L462 AbstractCegarLoop]: Abstraction has 889 states and 1240 transitions. [2019-10-14 21:55:09,951 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:09,951 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 1240 transitions. [2019-10-14 21:55:09,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-10-14 21:55:09,955 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:09,955 INFO L380 BasicCegarLoop]: trace histogram [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 21:55:10,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:10,160 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:10,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:10,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1073015084, now seen corresponding path program 1 times [2019-10-14 21:55:10,162 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:10,163 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357026787] [2019-10-14 21:55:10,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:10,163 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:10,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,395 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:10,635 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357026787] [2019-10-14 21:55:10,635 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:10,635 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:10,635 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813139450] [2019-10-14 21:55:10,636 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:10,636 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:10,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:10,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:10,637 INFO L87 Difference]: Start difference. First operand 889 states and 1240 transitions. Second operand 9 states. [2019-10-14 21:55:10,807 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:13,630 WARN L191 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:14,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:14,434 INFO L93 Difference]: Finished difference Result 2747 states and 4231 transitions. [2019-10-14 21:55:14,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:55:14,435 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 205 [2019-10-14 21:55:14,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:14,454 INFO L225 Difference]: With dead ends: 2747 [2019-10-14 21:55:14,455 INFO L226 Difference]: Without dead ends: 1864 [2019-10-14 21:55:14,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:55:14,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1864 states. [2019-10-14 21:55:14,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1864 to 1780. [2019-10-14 21:55:14,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2019-10-14 21:55:14,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2515 transitions. [2019-10-14 21:55:14,608 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2515 transitions. Word has length 205 [2019-10-14 21:55:14,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:14,609 INFO L462 AbstractCegarLoop]: Abstraction has 1780 states and 2515 transitions. [2019-10-14 21:55:14,609 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:14,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2515 transitions. [2019-10-14 21:55:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2019-10-14 21:55:14,618 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:14,619 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:14,619 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:14,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:14,620 INFO L82 PathProgramCache]: Analyzing trace with hash -2138348213, now seen corresponding path program 1 times [2019-10-14 21:55:14,620 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:14,620 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48757590] [2019-10-14 21:55:14,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:14,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:14,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:14,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,807 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:14,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:15,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48757590] [2019-10-14 21:55:15,053 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:15,053 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:55:15,054 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061292336] [2019-10-14 21:55:15,054 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:55:15,055 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:15,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:55:15,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:55:15,055 INFO L87 Difference]: Start difference. First operand 1780 states and 2515 transitions. Second operand 8 states. [2019-10-14 21:55:15,253 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:15,691 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:55:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:18,269 INFO L93 Difference]: Finished difference Result 5432 states and 8475 transitions. [2019-10-14 21:55:18,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:55:18,270 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 206 [2019-10-14 21:55:18,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:18,300 INFO L225 Difference]: With dead ends: 5432 [2019-10-14 21:55:18,300 INFO L226 Difference]: Without dead ends: 3658 [2019-10-14 21:55:18,308 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 21:55:18,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3658 states. [2019-10-14 21:55:18,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3658 to 3563. [2019-10-14 21:55:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3563 states. [2019-10-14 21:55:18,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 5135 transitions. [2019-10-14 21:55:18,472 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 5135 transitions. Word has length 206 [2019-10-14 21:55:18,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:18,473 INFO L462 AbstractCegarLoop]: Abstraction has 3563 states and 5135 transitions. [2019-10-14 21:55:18,473 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:55:18,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 5135 transitions. [2019-10-14 21:55:18,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2019-10-14 21:55:18,486 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:18,486 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:55:18,487 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash -429249948, now seen corresponding path program 1 times [2019-10-14 21:55:18,487 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:18,487 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567581987] [2019-10-14 21:55:18,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:18,488 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:18,488 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:18,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:18,833 WARN L191 SmtUtils]: Spent 229.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:55:19,031 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567581987] [2019-10-14 21:55:19,031 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:55:19,031 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 21:55:19,032 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062366310] [2019-10-14 21:55:19,032 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:55:19,032 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:19,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:55:19,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:19,033 INFO L87 Difference]: Start difference. First operand 3563 states and 5135 transitions. Second operand 9 states. [2019-10-14 21:55:19,168 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:19,608 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:22,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:22,055 INFO L93 Difference]: Finished difference Result 7239 states and 10864 transitions. [2019-10-14 21:55:22,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:55:22,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 213 [2019-10-14 21:55:22,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:22,077 INFO L225 Difference]: With dead ends: 7239 [2019-10-14 21:55:22,078 INFO L226 Difference]: Without dead ends: 3682 [2019-10-14 21:55:22,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:55:22,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3682 states. [2019-10-14 21:55:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3682 to 3609. [2019-10-14 21:55:22,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3609 states. [2019-10-14 21:55:22,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5066 transitions. [2019-10-14 21:55:22,205 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5066 transitions. Word has length 213 [2019-10-14 21:55:22,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:22,205 INFO L462 AbstractCegarLoop]: Abstraction has 3609 states and 5066 transitions. [2019-10-14 21:55:22,205 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:55:22,206 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5066 transitions. [2019-10-14 21:55:22,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2019-10-14 21:55:22,217 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:22,217 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] [2019-10-14 21:55:22,217 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:22,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:22,222 INFO L82 PathProgramCache]: Analyzing trace with hash 924779640, now seen corresponding path program 1 times [2019-10-14 21:55:22,223 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:22,224 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562773394] [2019-10-14 21:55:22,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,224 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:22,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,436 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,636 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 21:55:22,636 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562773394] [2019-10-14 21:55:22,637 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076861952] [2019-10-14 21:55:22,637 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 21:55:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:22,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 1052 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:22,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:22,945 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 21:55:22,945 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:22,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 21:55:22,946 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987122977] [2019-10-14 21:55:22,946 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:22,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:22,947 INFO L87 Difference]: Start difference. First operand 3609 states and 5066 transitions. Second operand 3 states. [2019-10-14 21:55:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:23,902 INFO L93 Difference]: Finished difference Result 10650 states and 15307 transitions. [2019-10-14 21:55:23,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:23,903 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 225 [2019-10-14 21:55:23,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:23,938 INFO L225 Difference]: With dead ends: 10650 [2019-10-14 21:55:23,938 INFO L226 Difference]: Without dead ends: 7047 [2019-10-14 21:55:23,952 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:55:23,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7047 states. [2019-10-14 21:55:24,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7047 to 7036. [2019-10-14 21:55:24,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7036 states. [2019-10-14 21:55:24,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7036 states to 7036 states and 9663 transitions. [2019-10-14 21:55:24,183 INFO L78 Accepts]: Start accepts. Automaton has 7036 states and 9663 transitions. Word has length 225 [2019-10-14 21:55:24,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:24,184 INFO L462 AbstractCegarLoop]: Abstraction has 7036 states and 9663 transitions. [2019-10-14 21:55:24,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:24,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7036 states and 9663 transitions. [2019-10-14 21:55:24,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2019-10-14 21:55:24,213 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:24,213 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] [2019-10-14 21:55:24,418 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:24,418 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash -525785014, now seen corresponding path program 1 times [2019-10-14 21:55:24,419 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:24,420 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582784539] [2019-10-14 21:55:24,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:24,420 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:24,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:24,708 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:24,951 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 21:55:24,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582784539] [2019-10-14 21:55:24,953 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807722357] [2019-10-14 21:55:24,953 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 21:55:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:25,118 INFO L256 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:25,123 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:25,196 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 21:55:25,197 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:55:25,197 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-14 21:55:25,197 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667933516] [2019-10-14 21:55:25,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:55:25,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:25,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:55:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:55:25,199 INFO L87 Difference]: Start difference. First operand 7036 states and 9663 transitions. Second operand 3 states. [2019-10-14 21:55:26,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:55:26,351 INFO L93 Difference]: Finished difference Result 20259 states and 28735 transitions. [2019-10-14 21:55:26,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:55:26,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 234 [2019-10-14 21:55:26,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:55:26,426 INFO L225 Difference]: With dead ends: 20259 [2019-10-14 21:55:26,426 INFO L226 Difference]: Without dead ends: 13229 [2019-10-14 21:55:26,446 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 238 SyntacticMatches, 1 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 21:55:26,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13229 states. [2019-10-14 21:55:26,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13229 to 13178. [2019-10-14 21:55:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13178 states. [2019-10-14 21:55:26,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13178 states to 13178 states and 18519 transitions. [2019-10-14 21:55:26,883 INFO L78 Accepts]: Start accepts. Automaton has 13178 states and 18519 transitions. Word has length 234 [2019-10-14 21:55:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:55:26,884 INFO L462 AbstractCegarLoop]: Abstraction has 13178 states and 18519 transitions. [2019-10-14 21:55:26,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:55:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 13178 states and 18519 transitions. [2019-10-14 21:55:26,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 21:55:26,935 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:55:26,935 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, 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] [2019-10-14 21:55:27,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:55:27,141 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:55:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:55:27,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1828535975, now seen corresponding path program 1 times [2019-10-14 21:55:27,141 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:55:27,142 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231688324] [2019-10-14 21:55:27,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:55:27,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:55:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,341 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:55:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,551 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:55:27,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231688324] [2019-10-14 21:55:27,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294607515] [2019-10-14 21:55:27,556 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 21:55:27,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:55:27,779 INFO L256 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:55:27,792 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:55:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 91 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:55:27,881 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:55:27,882 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:55:27,882 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020717879] [2019-10-14 21:55:27,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:55:27,883 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:55:27,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:55:27,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:55:27,884 INFO L87 Difference]: Start difference. First operand 13178 states and 18519 transitions. Second operand 11 states. [2019-10-14 21:55:28,030 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:55:28,472 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:55:28,841 WARN L191 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 130