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_label22.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:54:19,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:54:19,988 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:54:20,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:54:20,007 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:54:20,009 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:54:20,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:54:20,020 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:54:20,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:54:20,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:54:20,032 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:54:20,034 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:54:20,034 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:54:20,036 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:54:20,039 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:54:20,040 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:54:20,042 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:54:20,042 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:54:20,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:54:20,049 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:54:20,054 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:54:20,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:54:20,060 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:54:20,061 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:54:20,063 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:54:20,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:54:20,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:54:20,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:54:20,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:54:20,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:54:20,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:54:20,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:54:20,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:54:20,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:54:20,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:54:20,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:54:20,076 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 21:54:20,090 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:54:20,090 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:54:20,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:54:20,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:54:20,092 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:54:20,092 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:54:20,093 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:54:20,094 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:54:20,094 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:54:20,094 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:54:20,094 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:54:20,094 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:54:20,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:54:20,095 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:54:20,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:54:20,095 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:54:20,095 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:20,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:54:20,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:54:20,096 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:54:20,096 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:54:20,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:54:20,097 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:54:20,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:54:20,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:54:20,381 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:54:20,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:54:20,386 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:54:20,386 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:54:20,387 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-14 21:54:20,463 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a2a9f0d/2c41e1ffc359496b8b30faadf20f98c9/FLAGd82eb874f [2019-10-14 21:54:21,113 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:54:21,115 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem03_label22.c [2019-10-14 21:54:21,136 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a2a9f0d/2c41e1ffc359496b8b30faadf20f98c9/FLAGd82eb874f [2019-10-14 21:54:21,299 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/80a2a9f0d/2c41e1ffc359496b8b30faadf20f98c9 [2019-10-14 21:54:21,309 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:54:21,311 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:54:21,312 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:21,312 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:54:21,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:54:21,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:21" (1/1) ... [2019-10-14 21:54:21,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7f8ae9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:21, skipping insertion in model container [2019-10-14 21:54:21,320 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:54:21" (1/1) ... [2019-10-14 21:54:21,328 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:54:21,407 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:54:22,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:22,153 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:54:22,476 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:54:22,504 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:54:22,505 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22 WrapperNode [2019-10-14 21:54:22,505 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:54:22,506 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:54:22,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:54:22,526 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,667 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,697 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,713 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... [2019-10-14 21:54:22,728 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:54:22,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:54:22,729 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:54:22,729 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:54:22,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:54:22,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:54:22,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:54:22,796 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 21:54:22,796 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:54:22,796 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 21:54:22,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:54:22,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:54:22,797 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 21:54:22,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:54:22,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:54:22,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:54:24,780 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:54:24,781 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 21:54:24,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24 BoogieIcfgContainer [2019-10-14 21:54:24,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:54:24,784 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:54:24,784 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:54:24,787 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:54:24,787 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:54:21" (1/3) ... [2019-10-14 21:54:24,788 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bf6682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:54:22" (2/3) ... [2019-10-14 21:54:24,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19bf6682 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:54:24, skipping insertion in model container [2019-10-14 21:54:24,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:54:24" (3/3) ... [2019-10-14 21:54:24,800 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem03_label22.c [2019-10-14 21:54:24,813 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:54:24,824 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:54:24,838 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:54:24,887 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:54:24,887 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:54:24,887 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:54:24,887 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:54:24,887 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:54:24,888 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:54:24,888 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:54:24,888 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:54:24,935 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states. [2019-10-14 21:54:24,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-10-14 21:54:24,959 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:24,961 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] [2019-10-14 21:54:24,963 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:24,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:24,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1955035064, now seen corresponding path program 1 times [2019-10-14 21:54:24,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:24,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456487837] [2019-10-14 21:54:24,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:24,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:25,934 WARN L191 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:25,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:26,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:26,036 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456487837] [2019-10-14 21:54:26,037 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:26,037 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:54:26,037 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166240179] [2019-10-14 21:54:26,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:26,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:26,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:26,061 INFO L87 Difference]: Start difference. First operand 311 states. Second operand 5 states. [2019-10-14 21:54:26,288 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:29,465 INFO L93 Difference]: Finished difference Result 845 states and 1493 transitions. [2019-10-14 21:54:29,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:54:29,467 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 173 [2019-10-14 21:54:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:29,493 INFO L225 Difference]: With dead ends: 845 [2019-10-14 21:54:29,494 INFO L226 Difference]: Without dead ends: 470 [2019-10-14 21:54:29,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:54:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2019-10-14 21:54:29,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 464. [2019-10-14 21:54:29,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 464 states. [2019-10-14 21:54:29,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 743 transitions. [2019-10-14 21:54:29,596 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 743 transitions. Word has length 173 [2019-10-14 21:54:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:29,598 INFO L462 AbstractCegarLoop]: Abstraction has 464 states and 743 transitions. [2019-10-14 21:54:29,598 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:29,598 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 743 transitions. [2019-10-14 21:54:29,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2019-10-14 21:54:29,604 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:29,604 INFO L380 BasicCegarLoop]: trace histogram [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] [2019-10-14 21:54:29,605 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash -209024133, now seen corresponding path program 1 times [2019-10-14 21:54:29,605 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:29,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037314834] [2019-10-14 21:54:29,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,606 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:29,606 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:29,905 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:29,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:30,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037314834] [2019-10-14 21:54:30,096 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:54:30,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-14 21:54:30,097 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675035685] [2019-10-14 21:54:30,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:54:30,104 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:30,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:54:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:30,105 INFO L87 Difference]: Start difference. First operand 464 states and 743 transitions. Second operand 8 states. [2019-10-14 21:54:30,266 WARN L191 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:33,119 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2019-10-14 21:54:33,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:33,781 INFO L93 Difference]: Finished difference Result 1407 states and 2333 transitions. [2019-10-14 21:54:33,782 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:54:33,782 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 182 [2019-10-14 21:54:33,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:33,795 INFO L225 Difference]: With dead ends: 1407 [2019-10-14 21:54:33,795 INFO L226 Difference]: Without dead ends: 949 [2019-10-14 21:54:33,798 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:54:33,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 949 states. [2019-10-14 21:54:33,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 949 to 905. [2019-10-14 21:54:33,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 905 states. [2019-10-14 21:54:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1437 transitions. [2019-10-14 21:54:33,912 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1437 transitions. Word has length 182 [2019-10-14 21:54:33,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:33,912 INFO L462 AbstractCegarLoop]: Abstraction has 905 states and 1437 transitions. [2019-10-14 21:54:33,913 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:54:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1437 transitions. [2019-10-14 21:54:33,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-10-14 21:54:33,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:33,923 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] [2019-10-14 21:54:33,924 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:33,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:33,925 INFO L82 PathProgramCache]: Analyzing trace with hash -963709492, now seen corresponding path program 1 times [2019-10-14 21:54:33,925 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:33,925 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075491257] [2019-10-14 21:54:33,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,926 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:33,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,326 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,546 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075491257] [2019-10-14 21:54:34,547 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879787872] [2019-10-14 21:54:34,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:34,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:34,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 852 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:54:34,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:54:34,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:34,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2019-10-14 21:54:34,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897853808] [2019-10-14 21:54:34,973 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:34,973 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:54:34,974 INFO L87 Difference]: Start difference. First operand 905 states and 1437 transitions. Second operand 5 states. [2019-10-14 21:54:36,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:36,442 INFO L93 Difference]: Finished difference Result 2749 states and 4502 transitions. [2019-10-14 21:54:36,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:54:36,443 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 185 [2019-10-14 21:54:36,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:36,459 INFO L225 Difference]: With dead ends: 2749 [2019-10-14 21:54:36,459 INFO L226 Difference]: Without dead ends: 1850 [2019-10-14 21:54:36,464 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1850 states. [2019-10-14 21:54:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1850 to 1816. [2019-10-14 21:54:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1816 states. [2019-10-14 21:54:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1816 states to 1816 states and 2877 transitions. [2019-10-14 21:54:36,575 INFO L78 Accepts]: Start accepts. Automaton has 1816 states and 2877 transitions. Word has length 185 [2019-10-14 21:54:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:36,575 INFO L462 AbstractCegarLoop]: Abstraction has 1816 states and 2877 transitions. [2019-10-14 21:54:36,575 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1816 states and 2877 transitions. [2019-10-14 21:54:36,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-14 21:54:36,584 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:36,585 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2019-10-14 21:54:36,793 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:36,794 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 946393042, now seen corresponding path program 1 times [2019-10-14 21:54:36,794 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:36,796 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667156709] [2019-10-14 21:54:36,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,796 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:36,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:36,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,035 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,191 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:54:37,393 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667156709] [2019-10-14 21:54:37,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715503123] [2019-10-14 21:54:37,394 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:37,664 INFO L256 TraceCheckSpWp]: Trace formula consists of 1018 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:54:37,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:54:37,803 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:37,803 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 21:54:37,804 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149736307] [2019-10-14 21:54:37,804 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:54:37,805 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:37,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:54:37,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:37,806 INFO L87 Difference]: Start difference. First operand 1816 states and 2877 transitions. Second operand 5 states. [2019-10-14 21:54:39,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:39,178 INFO L93 Difference]: Finished difference Result 5483 states and 9339 transitions. [2019-10-14 21:54:39,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:54:39,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 192 [2019-10-14 21:54:39,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:39,203 INFO L225 Difference]: With dead ends: 5483 [2019-10-14 21:54:39,203 INFO L226 Difference]: Without dead ends: 3673 [2019-10-14 21:54:39,209 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:54:39,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3673 states. [2019-10-14 21:54:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3673 to 3599. [2019-10-14 21:54:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3599 states. [2019-10-14 21:54:39,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 5608 transitions. [2019-10-14 21:54:39,336 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 5608 transitions. Word has length 192 [2019-10-14 21:54:39,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:39,336 INFO L462 AbstractCegarLoop]: Abstraction has 3599 states and 5608 transitions. [2019-10-14 21:54:39,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:54:39,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 5608 transitions. [2019-10-14 21:54:39,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-10-14 21:54:39,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:39,348 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:39,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:39,553 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:39,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:39,554 INFO L82 PathProgramCache]: Analyzing trace with hash -880850368, now seen corresponding path program 1 times [2019-10-14 21:54:39,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:39,555 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467843192] [2019-10-14 21:54:39,555 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,556 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:39,556 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,795 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:39,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,955 WARN L191 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2019-10-14 21:54:39,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:39,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,102 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:54:40,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467843192] [2019-10-14 21:54:40,103 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484722] [2019-10-14 21:54:40,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:40,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:40,290 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:54:40,302 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-14 21:54:40,399 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:54:40,399 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2019-10-14 21:54:40,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361770629] [2019-10-14 21:54:40,400 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:54:40,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:40,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:54:40,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:54:40,401 INFO L87 Difference]: Start difference. First operand 3599 states and 5608 transitions. Second operand 11 states. [2019-10-14 21:54:40,582 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:40,942 WARN L191 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:41,299 WARN L191 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2019-10-14 21:54:41,602 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2019-10-14 21:54:43,957 WARN L191 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2019-10-14 21:54:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:51,755 INFO L93 Difference]: Finished difference Result 15053 states and 30163 transitions. [2019-10-14 21:54:51,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 21:54:51,756 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 203 [2019-10-14 21:54:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:51,870 INFO L225 Difference]: With dead ends: 15053 [2019-10-14 21:54:51,871 INFO L226 Difference]: Without dead ends: 11460 [2019-10-14 21:54:51,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=375, Invalid=1431, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 21:54:51,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11460 states. [2019-10-14 21:54:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11460 to 11174. [2019-10-14 21:54:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11174 states. [2019-10-14 21:54:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11174 states to 11174 states and 18323 transitions. [2019-10-14 21:54:52,621 INFO L78 Accepts]: Start accepts. Automaton has 11174 states and 18323 transitions. Word has length 203 [2019-10-14 21:54:52,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:54:52,621 INFO L462 AbstractCegarLoop]: Abstraction has 11174 states and 18323 transitions. [2019-10-14 21:54:52,621 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:54:52,622 INFO L276 IsEmpty]: Start isEmpty. Operand 11174 states and 18323 transitions. [2019-10-14 21:54:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2019-10-14 21:54:52,689 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:54:52,690 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:54:52,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:52,894 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:54:52,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:54:52,895 INFO L82 PathProgramCache]: Analyzing trace with hash 688096296, now seen corresponding path program 1 times [2019-10-14 21:54:52,895 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:54:52,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807443271] [2019-10-14 21:54:52,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:54:52,896 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:54:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,263 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2019-10-14 21:54:53,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 41 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:54:53,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807443271] [2019-10-14 21:54:53,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017903777] [2019-10-14 21:54:53,497 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:54:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:54:53,686 INFO L256 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:54:53,693 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:54:53,742 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-14 21:54:53,742 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:54:53,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 5 [2019-10-14 21:54:53,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436491818] [2019-10-14 21:54:53,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:54:53,744 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:54:53,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:54:53,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:53,744 INFO L87 Difference]: Start difference. First operand 11174 states and 18323 transitions. Second operand 3 states. [2019-10-14 21:54:55,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:54:55,166 INFO L93 Difference]: Finished difference Result 32593 states and 55288 transitions. [2019-10-14 21:54:55,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:54:55,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2019-10-14 21:54:55,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:54:55,296 INFO L225 Difference]: With dead ends: 32593 [2019-10-14 21:54:55,297 INFO L226 Difference]: Without dead ends: 21425 [2019-10-14 21:54:55,352 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:54:55,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21425 states.