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_label40.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:55:49,416 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:55:49,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:55:49,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:55:49,433 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:55:49,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:55:49,435 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:55:49,437 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:55:49,438 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:55:49,439 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:55:49,440 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:55:49,441 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:55:49,441 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:55:49,442 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:55:49,443 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:55:49,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:55:49,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:55:49,446 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:55:49,448 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:55:49,450 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:55:49,453 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:55:49,455 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:55:49,456 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:55:49,456 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:55:49,460 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:55:49,465 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:55:49,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:55:49,470 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:55:49,471 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:55:49,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:55:49,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:55:49,475 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:55:49,475 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:55:49,476 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:55:49,476 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:55:49,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:55:49,479 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 [2019-10-13 17:55:49,499 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:55:49,500 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:55:49,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:55:49,501 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:55:49,501 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:55:49,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:55:49,502 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:55:49,502 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:55:49,502 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:55:49,502 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:55:49,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:55:49,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:55:49,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:55:49,504 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:55:49,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:55:49,505 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:55:49,505 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:55:49,505 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:55:49,505 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:55:49,506 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:55:49,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:55:49,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:55:49,506 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:55:49,507 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:55:49,507 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:55:49,507 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:55:49,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:55:49,507 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:55:49,508 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:55:49,803 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:55:49,818 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:55:49,822 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:55:49,823 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:55:49,824 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:55:49,824 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-10-13 17:55:49,881 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f7773cbc/8fa6b46a9e3d4448b3cf83978ca8a3ef/FLAG4b2010499 [2019-10-13 17:55:50,467 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:55:50,468 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label40.c [2019-10-13 17:55:50,489 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f7773cbc/8fa6b46a9e3d4448b3cf83978ca8a3ef/FLAG4b2010499 [2019-10-13 17:55:50,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9f7773cbc/8fa6b46a9e3d4448b3cf83978ca8a3ef [2019-10-13 17:55:50,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:55:50,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:55:50,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:50,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:55:50,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:55:50,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:50" (1/1) ... [2019-10-13 17:55:50,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:50, skipping insertion in model container [2019-10-13 17:55:50,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:55:50" (1/1) ... [2019-10-13 17:55:50,672 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:55:50,744 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:55:51,568 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:51,582 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:55:51,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:55:51,961 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:55:51,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51 WrapperNode [2019-10-13 17:55:51,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:55:51,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:55:51,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:55:51,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:55:51,977 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:51,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,104 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (1/1) ... [2019-10-13 17:55:52,118 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:55:52,118 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:55:52,119 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:55:52,119 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:55:52,121 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (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 [2019-10-13 17:55:52,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:55:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:55:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 17:55:52,175 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:55:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 17:55:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:55:52,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:55:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 17:55:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:55:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:55:52,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:55:54,036 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:55:54,037 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 17:55:54,038 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:54 BoogieIcfgContainer [2019-10-13 17:55:54,038 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:55:54,040 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:55:54,040 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:55:54,043 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:55:54,044 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:55:50" (1/3) ... [2019-10-13 17:55:54,044 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffef796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:54, skipping insertion in model container [2019-10-13 17:55:54,045 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:55:51" (2/3) ... [2019-10-13 17:55:54,045 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ffef796 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:55:54, skipping insertion in model container [2019-10-13 17:55:54,046 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:55:54" (3/3) ... [2019-10-13 17:55:54,048 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label40.c [2019-10-13 17:55:54,057 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:55:54,067 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:55:54,079 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:55:54,126 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:55:54,127 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:55:54,127 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:55:54,127 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:55:54,127 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:55:54,128 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:55:54,128 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:55:54,128 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:55:54,173 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-13 17:55:54,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-10-13 17:55:54,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:55:54,217 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] [2019-10-13 17:55:54,219 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:55:54,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:55:54,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1898680923, now seen corresponding path program 1 times [2019-10-13 17:55:54,235 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:55:54,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188207758] [2019-10-13 17:55:54,236 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:55:54,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:55:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:55,194 WARN L191 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:55:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:55:55,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:55:55,400 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188207758] [2019-10-13 17:55:55,401 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:55:55,401 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:55:55,401 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344016733] [2019-10-13 17:55:55,406 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:55:55,407 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:55:55,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:55:55,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:55:55,423 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-13 17:55:55,611 WARN L191 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:55:55,918 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2019-10-13 17:55:59,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:55:59,852 INFO L93 Difference]: Finished difference Result 1082 states and 1940 transitions. [2019-10-13 17:55:59,852 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:55:59,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 190 [2019-10-13 17:55:59,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:55:59,886 INFO L225 Difference]: With dead ends: 1082 [2019-10-13 17:55:59,886 INFO L226 Difference]: Without dead ends: 687 [2019-10-13 17:55:59,898 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 [2019-10-13 17:55:59,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2019-10-13 17:56:00,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 462. [2019-10-13 17:56:00,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 462 states. [2019-10-13 17:56:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 756 transitions. [2019-10-13 17:56:00,019 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 756 transitions. Word has length 190 [2019-10-13 17:56:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:00,020 INFO L462 AbstractCegarLoop]: Abstraction has 462 states and 756 transitions. [2019-10-13 17:56:00,020 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 756 transitions. [2019-10-13 17:56:00,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2019-10-13 17:56:00,026 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:00,027 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] [2019-10-13 17:56:00,029 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:00,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:00,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1068911710, now seen corresponding path program 1 times [2019-10-13 17:56:00,030 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:00,030 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006614580] [2019-10-13 17:56:00,030 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:00,031 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:00,031 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,314 WARN L191 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:00,526 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006614580] [2019-10-13 17:56:00,526 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:56:00,526 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 17:56:00,526 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145787918] [2019-10-13 17:56:00,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:00,529 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:00,529 INFO L87 Difference]: Start difference. First operand 462 states and 756 transitions. Second operand 9 states. [2019-10-13 17:56:00,734 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:01,294 WARN L191 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:04,140 INFO L93 Difference]: Finished difference Result 1370 states and 2282 transitions. [2019-10-13 17:56:04,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 17:56:04,140 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 217 [2019-10-13 17:56:04,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:04,147 INFO L225 Difference]: With dead ends: 1370 [2019-10-13 17:56:04,147 INFO L226 Difference]: Without dead ends: 914 [2019-10-13 17:56:04,150 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:56:04,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 914 states. [2019-10-13 17:56:04,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 914 to 893. [2019-10-13 17:56:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 893 states. [2019-10-13 17:56:04,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 1312 transitions. [2019-10-13 17:56:04,210 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 1312 transitions. Word has length 217 [2019-10-13 17:56:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:04,210 INFO L462 AbstractCegarLoop]: Abstraction has 893 states and 1312 transitions. [2019-10-13 17:56:04,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:04,211 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 1312 transitions. [2019-10-13 17:56:04,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2019-10-13 17:56:04,216 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:04,216 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] [2019-10-13 17:56:04,217 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:04,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:04,217 INFO L82 PathProgramCache]: Analyzing trace with hash 880538771, now seen corresponding path program 1 times [2019-10-13 17:56:04,218 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:04,218 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479490899] [2019-10-13 17:56:04,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:04,218 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:04,219 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:04,700 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:04,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:05,049 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 41 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:05,051 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479490899] [2019-10-13 17:56:05,055 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567329287] [2019-10-13 17:56:05,056 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 [2019-10-13 17:56:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:05,259 INFO L256 TraceCheckSpWp]: Trace formula consists of 896 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:05,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:05,449 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:05,449 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:56:05,450 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345092425] [2019-10-13 17:56:05,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:56:05,452 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:05,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:56:05,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:05,452 INFO L87 Difference]: Start difference. First operand 893 states and 1312 transitions. Second operand 3 states. [2019-10-13 17:56:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:06,458 INFO L93 Difference]: Finished difference Result 2644 states and 3957 transitions. [2019-10-13 17:56:06,459 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:56:06,460 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 235 [2019-10-13 17:56:06,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:06,474 INFO L225 Difference]: With dead ends: 2644 [2019-10-13 17:56:06,474 INFO L226 Difference]: Without dead ends: 1757 [2019-10-13 17:56:06,478 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:56:06,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2019-10-13 17:56:06,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1743. [2019-10-13 17:56:06,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1743 states. [2019-10-13 17:56:06,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1743 states to 1743 states and 2549 transitions. [2019-10-13 17:56:06,552 INFO L78 Accepts]: Start accepts. Automaton has 1743 states and 2549 transitions. Word has length 235 [2019-10-13 17:56:06,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:06,553 INFO L462 AbstractCegarLoop]: Abstraction has 1743 states and 2549 transitions. [2019-10-13 17:56:06,553 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:56:06,553 INFO L276 IsEmpty]: Start isEmpty. Operand 1743 states and 2549 transitions. [2019-10-13 17:56:06,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2019-10-13 17:56:06,564 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:06,565 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, 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] [2019-10-13 17:56:06,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:06,770 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:06,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:06,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1518602962, now seen corresponding path program 1 times [2019-10-13 17:56:06,771 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:06,771 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426888520] [2019-10-13 17:56:06,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:06,772 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:06,772 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:07,088 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:07,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:07,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 52 proven. 17 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:07,424 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426888520] [2019-10-13 17:56:07,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531871352] [2019-10-13 17:56:07,425 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 [2019-10-13 17:56:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:07,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 1075 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:56:07,705 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:07,792 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:56:07,792 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:07,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 11 [2019-10-13 17:56:07,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106756696] [2019-10-13 17:56:07,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:56:07,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:07,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:56:07,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:07,795 INFO L87 Difference]: Start difference. First operand 1743 states and 2549 transitions. Second operand 5 states. [2019-10-13 17:56:08,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:08,996 INFO L93 Difference]: Finished difference Result 4376 states and 6480 transitions. [2019-10-13 17:56:08,997 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:56:08,997 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 250 [2019-10-13 17:56:08,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:09,012 INFO L225 Difference]: With dead ends: 4376 [2019-10-13 17:56:09,013 INFO L226 Difference]: Without dead ends: 2639 [2019-10-13 17:56:09,018 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:56:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2639 states. [2019-10-13 17:56:09,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2639 to 2597. [2019-10-13 17:56:09,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2597 states. [2019-10-13 17:56:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2597 states to 2597 states and 3553 transitions. [2019-10-13 17:56:09,110 INFO L78 Accepts]: Start accepts. Automaton has 2597 states and 3553 transitions. Word has length 250 [2019-10-13 17:56:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:09,111 INFO L462 AbstractCegarLoop]: Abstraction has 2597 states and 3553 transitions. [2019-10-13 17:56:09,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:56:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2597 states and 3553 transitions. [2019-10-13 17:56:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-13 17:56:09,120 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:09,120 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, 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] [2019-10-13 17:56:09,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:09,325 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:09,326 INFO L82 PathProgramCache]: Analyzing trace with hash 1763415962, now seen corresponding path program 1 times [2019-10-13 17:56:09,327 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:09,327 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986701967] [2019-10-13 17:56:09,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:09,328 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:09,328 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,557 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:09,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:09,913 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 74 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:56:09,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986701967] [2019-10-13 17:56:09,914 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778467599] [2019-10-13 17:56:09,914 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 [2019-10-13 17:56:10,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:10,143 INFO L256 TraceCheckSpWp]: Trace formula consists of 1252 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:56:10,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:10,240 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:56:10,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:56:10,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-13 17:56:10,241 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475395177] [2019-10-13 17:56:10,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:56:10,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:10,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:56:10,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:56:10,243 INFO L87 Difference]: Start difference. First operand 2597 states and 3553 transitions. Second operand 11 states. [2019-10-13 17:56:10,404 WARN L191 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-13 17:56:10,684 WARN L191 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:11,740 WARN L191 SmtUtils]: Spent 289.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:14,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:14,031 INFO L93 Difference]: Finished difference Result 6536 states and 9220 transitions. [2019-10-13 17:56:14,031 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:56:14,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 262 [2019-10-13 17:56:14,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:14,055 INFO L225 Difference]: With dead ends: 6536 [2019-10-13 17:56:14,055 INFO L226 Difference]: Without dead ends: 3945 [2019-10-13 17:56:14,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:56:14,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2019-10-13 17:56:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3881. [2019-10-13 17:56:14,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3881 states. [2019-10-13 17:56:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3881 states to 3881 states and 5072 transitions. [2019-10-13 17:56:14,209 INFO L78 Accepts]: Start accepts. Automaton has 3881 states and 5072 transitions. Word has length 262 [2019-10-13 17:56:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:14,217 INFO L462 AbstractCegarLoop]: Abstraction has 3881 states and 5072 transitions. [2019-10-13 17:56:14,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:56:14,218 INFO L276 IsEmpty]: Start isEmpty. Operand 3881 states and 5072 transitions. [2019-10-13 17:56:14,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2019-10-13 17:56:14,233 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:14,233 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2019-10-13 17:56:14,446 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:14,447 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:14,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:14,447 INFO L82 PathProgramCache]: Analyzing trace with hash -597819644, now seen corresponding path program 1 times [2019-10-13 17:56:14,448 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:14,448 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323335524] [2019-10-13 17:56:14,448 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,449 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:14,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,671 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 112 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:56:14,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323335524] [2019-10-13 17:56:14,951 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945629609] [2019-10-13 17:56:14,951 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 [2019-10-13 17:56:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:15,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:56:15,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:15,235 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 113 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:56:15,235 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:56:15,236 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2019-10-13 17:56:15,236 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91341971] [2019-10-13 17:56:15,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:56:15,237 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:15,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:56:15,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:56:15,238 INFO L87 Difference]: Start difference. First operand 3881 states and 5072 transitions. Second operand 9 states. [2019-10-13 17:56:15,484 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-13 17:56:15,940 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-13 17:56:20,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:20,323 INFO L93 Difference]: Finished difference Result 14435 states and 21084 transitions. [2019-10-13 17:56:20,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:56:20,323 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 273 [2019-10-13 17:56:20,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:20,394 INFO L225 Difference]: With dead ends: 14435 [2019-10-13 17:56:20,395 INFO L226 Difference]: Without dead ends: 10560 [2019-10-13 17:56:20,412 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:56:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2019-10-13 17:56:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 9932. [2019-10-13 17:56:20,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9932 states. [2019-10-13 17:56:20,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9932 states to 9932 states and 13165 transitions. [2019-10-13 17:56:20,868 INFO L78 Accepts]: Start accepts. Automaton has 9932 states and 13165 transitions. Word has length 273 [2019-10-13 17:56:20,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:20,868 INFO L462 AbstractCegarLoop]: Abstraction has 9932 states and 13165 transitions. [2019-10-13 17:56:20,868 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:56:20,868 INFO L276 IsEmpty]: Start isEmpty. Operand 9932 states and 13165 transitions. [2019-10-13 17:56:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2019-10-13 17:56:20,905 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:20,905 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:56:21,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:21,116 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:21,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:21,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1413938940, now seen corresponding path program 1 times [2019-10-13 17:56:21,117 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:21,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114481213] [2019-10-13 17:56:21,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:21,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:21,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:21,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:21,345 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:21,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:21,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:21,616 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:56:21,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114481213] [2019-10-13 17:56:21,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049521979] [2019-10-13 17:56:21,617 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 [2019-10-13 17:56:21,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:21,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 1132 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:56:21,840 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:56:21,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:56:21,892 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:56:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-10-13 17:56:21,972 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:56:21,972 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 12 [2019-10-13 17:56:21,972 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344772987] [2019-10-13 17:56:21,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:56:21,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:56:21,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:56:21,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:56:21,979 INFO L87 Difference]: Start difference. First operand 9932 states and 13165 transitions. Second operand 6 states. [2019-10-13 17:56:23,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:56:23,635 INFO L93 Difference]: Finished difference Result 17254 states and 23935 transitions. [2019-10-13 17:56:23,635 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:56:23,636 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 303 [2019-10-13 17:56:23,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:56:23,730 INFO L225 Difference]: With dead ends: 17254 [2019-10-13 17:56:23,731 INFO L226 Difference]: Without dead ends: 10131 [2019-10-13 17:56:23,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 303 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:56:23,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10131 states. [2019-10-13 17:56:24,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10131 to 9952. [2019-10-13 17:56:24,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9952 states. [2019-10-13 17:56:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9952 states to 9952 states and 13255 transitions. [2019-10-13 17:56:24,084 INFO L78 Accepts]: Start accepts. Automaton has 9952 states and 13255 transitions. Word has length 303 [2019-10-13 17:56:24,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:56:24,085 INFO L462 AbstractCegarLoop]: Abstraction has 9952 states and 13255 transitions. [2019-10-13 17:56:24,085 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:56:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 9952 states and 13255 transitions. [2019-10-13 17:56:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2019-10-13 17:56:24,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:56:24,136 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 17:56:24,343 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:56:24,343 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:56:24,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:56:24,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1879712399, now seen corresponding path program 1 times [2019-10-13 17:56:24,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:56:24,344 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767188362] [2019-10-13 17:56:24,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:24,344 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:56:24,344 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:56:24,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,607 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-13 17:56:24,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:56:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 109 proven. 31 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:56:24,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767188362] [2019-10-13 17:56:24,966 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629140184] [2019-10-13 17:56:24,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true