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/Problem12_label29.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:27,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:27,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:27,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:27,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:27,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:27,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:27,044 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:27,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:27,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:27,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:27,050 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:27,050 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:27,053 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:27,055 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:27,056 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:27,058 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:27,062 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:27,063 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:27,068 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:27,072 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:27,074 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:27,077 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:27,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:27,081 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:27,086 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:27,088 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:27,089 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:27,090 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:27,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:27,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:27,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:27,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:27,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:27,094 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:27,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:27,096 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:01:27,128 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:27,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:27,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:27,130 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:27,130 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:27,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:27,131 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:27,131 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:27,131 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:27,131 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:27,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:27,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:27,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:27,133 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:27,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:27,134 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:27,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:27,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:27,134 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:27,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:27,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:27,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:27,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:27,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:27,135 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:27,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:27,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:27,136 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:27,136 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:27,404 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:27,423 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:27,428 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:27,429 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:27,430 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:27,431 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-13 18:01:27,503 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d2759ac/82815187ad7f457891fdc10afd7baec6/FLAGfbd71b279 [2019-10-13 18:01:28,202 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:28,202 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-13 18:01:28,237 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d2759ac/82815187ad7f457891fdc10afd7baec6/FLAGfbd71b279 [2019-10-13 18:01:28,331 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62d2759ac/82815187ad7f457891fdc10afd7baec6 [2019-10-13 18:01:28,342 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:28,343 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:28,349 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:28,349 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:28,353 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:28,355 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:28" (1/1) ... [2019-10-13 18:01:28,358 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b0cb0e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:28, skipping insertion in model container [2019-10-13 18:01:28,359 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:28" (1/1) ... [2019-10-13 18:01:28,367 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:28,517 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:30,056 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:30,068 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:30,687 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:30,716 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:30,717 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30 WrapperNode [2019-10-13 18:01:30,718 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:30,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:30,719 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:30,719 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:30,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,792 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,932 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:30,983 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... [2019-10-13 18:01:31,057 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:31,058 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:31,058 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:31,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:31,060 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:31,142 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:31,143 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:31,143 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:31,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:31,145 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:31,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:31,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:01:37,064 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:01:37,065 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:01:37,067 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:37 BoogieIcfgContainer [2019-10-13 18:01:37,067 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:01:37,069 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:01:37,069 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:01:37,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:01:37,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:28" (1/3) ... [2019-10-13 18:01:37,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d98d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:37, skipping insertion in model container [2019-10-13 18:01:37,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:30" (2/3) ... [2019-10-13 18:01:37,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69d98d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:37, skipping insertion in model container [2019-10-13 18:01:37,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:37" (3/3) ... [2019-10-13 18:01:37,078 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label29.c [2019-10-13 18:01:37,092 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:01:37,105 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:01:37,123 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:01:37,191 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:01:37,191 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:01:37,192 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:01:37,192 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:01:37,192 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:01:37,192 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:01:37,193 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:01:37,193 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:01:37,244 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:01:37,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-13 18:01:37,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:37,256 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] [2019-10-13 18:01:37,259 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:37,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1364317718, now seen corresponding path program 1 times [2019-10-13 18:01:37,278 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:37,278 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004415160] [2019-10-13 18:01:37,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:37,279 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:37,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:37,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:37,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:37,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004415160] [2019-10-13 18:01:37,791 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:37,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:01:37,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045517616] [2019-10-13 18:01:37,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:37,799 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:37,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:37,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:37,817 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:01:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:51,834 INFO L93 Difference]: Finished difference Result 3269 states and 6302 transitions. [2019-10-13 18:01:51,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:01:51,836 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-13 18:01:51,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:51,869 INFO L225 Difference]: With dead ends: 3269 [2019-10-13 18:01:51,869 INFO L226 Difference]: Without dead ends: 2346 [2019-10-13 18:01:51,880 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 [2019-10-13 18:01:51,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-13 18:01:52,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2342. [2019-10-13 18:01:52,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2342 states. [2019-10-13 18:01:52,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3696 transitions. [2019-10-13 18:01:52,105 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3696 transitions. Word has length 61 [2019-10-13 18:01:52,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:52,107 INFO L462 AbstractCegarLoop]: Abstraction has 2342 states and 3696 transitions. [2019-10-13 18:01:52,107 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:52,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3696 transitions. [2019-10-13 18:01:52,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-13 18:01:52,123 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:52,124 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:01:52,124 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash 921108326, now seen corresponding path program 1 times [2019-10-13 18:01:52,126 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:52,126 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178316365] [2019-10-13 18:01:52,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:52,126 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:52,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:52,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:52,423 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:52,423 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178316365] [2019-10-13 18:01:52,424 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:52,424 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-13 18:01:52,424 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975503536] [2019-10-13 18:01:52,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 18:01:52,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:52,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 18:01:52,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:01:52,429 INFO L87 Difference]: Start difference. First operand 2342 states and 3696 transitions. Second operand 7 states. [2019-10-13 18:02:03,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:03,636 INFO L93 Difference]: Finished difference Result 7144 states and 11393 transitions. [2019-10-13 18:02:03,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 18:02:03,637 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-13 18:02:03,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:03,664 INFO L225 Difference]: With dead ends: 7144 [2019-10-13 18:02:03,664 INFO L226 Difference]: Without dead ends: 4808 [2019-10-13 18:02:03,671 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:02:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2019-10-13 18:02:03,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4737. [2019-10-13 18:02:03,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4737 states. [2019-10-13 18:02:03,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 6854 transitions. [2019-10-13 18:02:03,849 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 6854 transitions. Word has length 141 [2019-10-13 18:02:03,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:03,850 INFO L462 AbstractCegarLoop]: Abstraction has 4737 states and 6854 transitions. [2019-10-13 18:02:03,850 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 18:02:03,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 6854 transitions. [2019-10-13 18:02:03,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-13 18:02:03,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:03,853 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:02:03,853 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:03,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:03,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2074427823, now seen corresponding path program 1 times [2019-10-13 18:02:03,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:03,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925028427] [2019-10-13 18:02:03,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:03,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:03,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:04,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat