java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:48,836 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:48,838 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:48,850 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:48,850 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:48,851 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:48,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:48,854 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:48,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:48,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:48,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:48,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:48,859 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:48,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:48,860 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:48,861 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:48,862 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:48,863 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:48,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:48,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:48,868 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:48,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:48,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:48,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:48,873 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:48,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:02:48,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:02:48,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:02:48,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:02:48,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:02:48,880 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:02:48,881 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:02:48,881 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:02:48,881 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:48,882 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:48,882 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:48,883 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 22:02:48,900 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:48,901 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:48,902 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:48,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:48,902 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:48,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:48,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:48,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:48,904 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:48,904 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:48,904 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:48,904 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:48,905 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:48,905 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:48,905 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:48,905 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:48,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:48,906 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:48,906 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:48,906 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:48,906 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:48,906 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:48,907 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:48,907 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:49,187 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:49,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:49,213 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:49,215 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:49,215 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:49,216 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-14 22:02:49,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e02431f/264bf449860d4107884e645cb7f9ac46/FLAG0b9e66794 [2019-10-14 22:02:49,974 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:49,977 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem15_label14.c [2019-10-14 22:02:50,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e02431f/264bf449860d4107884e645cb7f9ac46/FLAG0b9e66794 [2019-10-14 22:02:50,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/32e02431f/264bf449860d4107884e645cb7f9ac46 [2019-10-14 22:02:50,166 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:50,167 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:50,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:50,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:50,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:50,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:50" (1/1) ... [2019-10-14 22:02:50,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fb457ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:50, skipping insertion in model container [2019-10-14 22:02:50,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:50" (1/1) ... [2019-10-14 22:02:50,185 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:50,277 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:51,199 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:51,207 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:51,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:51,524 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:51,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51 WrapperNode [2019-10-14 22:02:51,525 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:51,526 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:51,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:51,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:51,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,600 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,601 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,686 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,706 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,732 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (1/1) ... [2019-10-14 22:02:51,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:51,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:51,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:51,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:51,762 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (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 [2019-10-14 22:02:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:51,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:51,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:51,826 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:02:51,826 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:51,826 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:02:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:51,827 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:51,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:55,041 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:55,042 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:55,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:55 BoogieIcfgContainer [2019-10-14 22:02:55,047 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:55,049 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:55,049 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:55,052 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:55,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:50" (1/3) ... [2019-10-14 22:02:55,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c10bb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:55, skipping insertion in model container [2019-10-14 22:02:55,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:51" (2/3) ... [2019-10-14 22:02:55,055 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c10bb69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:55, skipping insertion in model container [2019-10-14 22:02:55,055 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:55" (3/3) ... [2019-10-14 22:02:55,063 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem15_label14.c [2019-10-14 22:02:55,076 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:55,087 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:55,099 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:55,154 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:55,154 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:55,155 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:55,155 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:55,155 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:55,156 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:55,156 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:55,156 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:55,203 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states. [2019-10-14 22:02:55,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 22:02:55,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:55,213 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] [2019-10-14 22:02:55,217 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:55,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:55,226 INFO L82 PathProgramCache]: Analyzing trace with hash -436791267, now seen corresponding path program 1 times [2019-10-14 22:02:55,236 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:55,236 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628986038] [2019-10-14 22:02:55,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:55,237 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:55,238 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:55,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628986038] [2019-10-14 22:02:55,682 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:55,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:55,683 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069410584] [2019-10-14 22:02:55,689 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:55,689 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:55,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:55,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:55,707 INFO L87 Difference]: Start difference. First operand 437 states. Second operand 5 states. [2019-10-14 22:03:02,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:02,770 INFO L93 Difference]: Finished difference Result 1528 states and 2801 transitions. [2019-10-14 22:03:02,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:02,777 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 22:03:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:02,805 INFO L225 Difference]: With dead ends: 1528 [2019-10-14 22:03:02,805 INFO L226 Difference]: Without dead ends: 1022 [2019-10-14 22:03:02,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:02,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2019-10-14 22:03:02,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 1016. [2019-10-14 22:03:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1016 states. [2019-10-14 22:03:02,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1523 transitions. [2019-10-14 22:03:02,983 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1523 transitions. Word has length 21 [2019-10-14 22:03:02,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:02,985 INFO L462 AbstractCegarLoop]: Abstraction has 1016 states and 1523 transitions. [2019-10-14 22:03:02,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:02,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1523 transitions. [2019-10-14 22:03:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-14 22:03:02,994 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:02,995 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:02,996 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:02,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1982781274, now seen corresponding path program 1 times [2019-10-14 22:03:02,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:02,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118111009] [2019-10-14 22:03:02,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:02,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:03,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,358 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:03,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118111009] [2019-10-14 22:03:03,358 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392956877] [2019-10-14 22:03:03,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:03,446 INFO L256 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:03,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:03,526 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:03,527 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:03,527 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:03:03,527 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706035182] [2019-10-14 22:03:03,529 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:03:03,530 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:03,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:03:03,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:03,530 INFO L87 Difference]: Start difference. First operand 1016 states and 1523 transitions. Second operand 3 states. [2019-10-14 22:03:06,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:06,074 INFO L93 Difference]: Finished difference Result 2961 states and 4483 transitions. [2019-10-14 22:03:06,075 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:03:06,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 90 [2019-10-14 22:03:06,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:06,084 INFO L225 Difference]: With dead ends: 2961 [2019-10-14 22:03:06,084 INFO L226 Difference]: Without dead ends: 1951 [2019-10-14 22:03:06,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:03:06,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2019-10-14 22:03:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1949. [2019-10-14 22:03:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1949 states. [2019-10-14 22:03:06,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1949 states to 1949 states and 2576 transitions. [2019-10-14 22:03:06,161 INFO L78 Accepts]: Start accepts. Automaton has 1949 states and 2576 transitions. Word has length 90 [2019-10-14 22:03:06,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:06,162 INFO L462 AbstractCegarLoop]: Abstraction has 1949 states and 2576 transitions. [2019-10-14 22:03:06,162 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:03:06,163 INFO L276 IsEmpty]: Start isEmpty. Operand 1949 states and 2576 transitions. [2019-10-14 22:03:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-10-14 22:03:06,169 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:06,169 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-14 22:03:06,371 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:06,371 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:06,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1546364994, now seen corresponding path program 1 times [2019-10-14 22:03:06,372 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:06,372 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089090993] [2019-10-14 22:03:06,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:06,373 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:06,373 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:06,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,794 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 22:03:06,794 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089090993] [2019-10-14 22:03:06,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063617542] [2019-10-14 22:03:06,795 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:06,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:06,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 22:03:06,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2019-10-14 22:03:07,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:07,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2019-10-14 22:03:07,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107708604] [2019-10-14 22:03:07,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 22:03:07,021 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:07,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 22:03:07,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-14 22:03:07,021 INFO L87 Difference]: Start difference. First operand 1949 states and 2576 transitions. Second operand 8 states. [2019-10-14 22:03:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:13,240 INFO L93 Difference]: Finished difference Result 5832 states and 7801 transitions. [2019-10-14 22:03:13,245 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 22:03:13,246 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 199 [2019-10-14 22:03:13,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:13,265 INFO L225 Difference]: With dead ends: 5832 [2019-10-14 22:03:13,265 INFO L226 Difference]: Without dead ends: 3889 [2019-10-14 22:03:13,271 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:03:13,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2019-10-14 22:03:13,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3540. [2019-10-14 22:03:13,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3540 states. [2019-10-14 22:03:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3540 states to 3540 states and 4406 transitions. [2019-10-14 22:03:13,369 INFO L78 Accepts]: Start accepts. Automaton has 3540 states and 4406 transitions. Word has length 199 [2019-10-14 22:03:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:13,371 INFO L462 AbstractCegarLoop]: Abstraction has 3540 states and 4406 transitions. [2019-10-14 22:03:13,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 22:03:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3540 states and 4406 transitions. [2019-10-14 22:03:13,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2019-10-14 22:03:13,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:13,377 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:13,581 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:13,582 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:13,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:13,582 INFO L82 PathProgramCache]: Analyzing trace with hash -666228620, now seen corresponding path program 1 times [2019-10-14 22:03:13,583 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:13,583 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464520804] [2019-10-14 22:03:13,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:13,583 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:13,583 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:13,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:13,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:13,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:13,990 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:13,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464520804] [2019-10-14 22:03:13,992 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343967694] [2019-10-14 22:03:13,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:14,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 478 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 22:03:14,222 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:14,309 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 93 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-14 22:03:14,514 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:03:14,514 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2019-10-14 22:03:14,514 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666641880] [2019-10-14 22:03:14,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:03:14,516 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:14,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:03:14,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:03:14,516 INFO L87 Difference]: Start difference. First operand 3540 states and 4406 transitions. Second operand 5 states. [2019-10-14 22:03:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:03:18,155 INFO L93 Difference]: Finished difference Result 7143 states and 8946 transitions. [2019-10-14 22:03:18,156 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:03:18,156 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2019-10-14 22:03:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:03:18,177 INFO L225 Difference]: With dead ends: 7143 [2019-10-14 22:03:18,177 INFO L226 Difference]: Without dead ends: 3609 [2019-10-14 22:03:18,185 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:03:18,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2019-10-14 22:03:18,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 3562. [2019-10-14 22:03:18,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3562 states. [2019-10-14 22:03:18,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3562 states to 3562 states and 4435 transitions. [2019-10-14 22:03:18,285 INFO L78 Accepts]: Start accepts. Automaton has 3562 states and 4435 transitions. Word has length 301 [2019-10-14 22:03:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:03:18,287 INFO L462 AbstractCegarLoop]: Abstraction has 3562 states and 4435 transitions. [2019-10-14 22:03:18,287 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:03:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3562 states and 4435 transitions. [2019-10-14 22:03:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 376 [2019-10-14 22:03:18,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:03:18,296 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:03:18,500 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:03:18,500 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:03:18,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:03:18,501 INFO L82 PathProgramCache]: Analyzing trace with hash 579508701, now seen corresponding path program 1 times [2019-10-14 22:03:18,502 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:03:18,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914702496] [2019-10-14 22:03:18,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:18,503 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:03:18,503 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:03:18,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 29 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 22:03:18,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914702496] [2019-10-14 22:03:18,952 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319910258] [2019-10-14 22:03:18,952 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 22:03:19,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:03:19,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:03:19,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:03:19,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:03:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 106 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:03:19,352 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:03:19,353 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 22:03:19,353 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508714182] [2019-10-14 22:03:19,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:03:19,357 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:03:19,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:03:19,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:03:19,364 INFO L87 Difference]: Start difference. First operand 3562 states and 4435 transitions. Second operand 9 states.