/usr/bin/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/Problem13_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 19:12:01,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 19:12:01,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 19:12:01,030 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 19:12:01,030 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 19:12:01,032 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 19:12:01,033 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 19:12:01,035 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 19:12:01,036 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 19:12:01,037 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 19:12:01,038 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 19:12:01,039 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 19:12:01,039 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 19:12:01,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 19:12:01,041 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 19:12:01,042 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 19:12:01,043 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 19:12:01,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 19:12:01,046 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 19:12:01,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 19:12:01,049 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 19:12:01,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 19:12:01,051 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 19:12:01,052 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 19:12:01,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 19:12:01,055 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 19:12:01,055 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 19:12:01,056 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 19:12:01,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 19:12:01,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 19:12:01,057 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 19:12:01,058 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 19:12:01,059 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 19:12:01,060 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 19:12:01,061 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 19:12:01,061 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 19:12:01,062 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 19:12:01,062 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 19:12:01,062 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 19:12:01,063 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 19:12:01,064 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 19:12:01,064 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 [2019-11-06 19:12:01,078 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 19:12:01,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 19:12:01,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 19:12:01,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 19:12:01,080 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 19:12:01,080 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 19:12:01,081 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 19:12:01,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 19:12:01,082 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 19:12:01,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 19:12:01,082 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 19:12:01,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 19:12:01,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 19:12:01,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 19:12:01,083 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 19:12:01,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 19:12:01,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 19:12:01,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 19:12:01,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 19:12:01,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 19:12:01,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 19:12:01,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 19:12:01,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 19:12:01,086 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 19:12:01,345 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 19:12:01,357 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 19:12:01,361 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 19:12:01,362 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 19:12:01,363 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 19:12:01,363 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-06 19:12:01,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45318c24f/0479798f5ce0446f94e5484a63eceb7e/FLAG4b9d680a6 [2019-11-06 19:12:02,305 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 19:12:02,307 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem13_label20.c [2019-11-06 19:12:02,361 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45318c24f/0479798f5ce0446f94e5484a63eceb7e/FLAG4b9d680a6 [2019-11-06 19:12:02,828 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45318c24f/0479798f5ce0446f94e5484a63eceb7e [2019-11-06 19:12:02,837 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 19:12:02,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 19:12:02,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:02,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 19:12:02,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 19:12:02,844 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:02" (1/1) ... [2019-11-06 19:12:02,847 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f3db85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:02, skipping insertion in model container [2019-11-06 19:12:02,847 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 07:12:02" (1/1) ... [2019-11-06 19:12:02,855 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 19:12:03,025 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 19:12:04,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:04,790 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 19:12:05,520 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 19:12:05,551 INFO L192 MainTranslator]: Completed translation [2019-11-06 19:12:05,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05 WrapperNode [2019-11-06 19:12:05,552 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 19:12:05,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 19:12:05,553 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 19:12:05,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 19:12:05,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,568 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,635 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,786 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,822 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (1/1) ... [2019-11-06 19:12:05,909 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 19:12:05,910 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 19:12:05,910 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 19:12:05,910 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 19:12:05,911 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (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 [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-11-06 19:12:05,968 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-11-06 19:12:05,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 19:12:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 19:12:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-11-06 19:12:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-11-06 19:12:05,969 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-11-06 19:12:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 19:12:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 19:12:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 19:12:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 19:12:05,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 19:12:05,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 19:12:12,314 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 19:12:12,315 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 19:12:12,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:12 BoogieIcfgContainer [2019-11-06 19:12:12,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 19:12:12,321 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 19:12:12,321 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 19:12:12,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 19:12:12,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 07:12:02" (1/3) ... [2019-11-06 19:12:12,327 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58023293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:12, skipping insertion in model container [2019-11-06 19:12:12,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 07:12:05" (2/3) ... [2019-11-06 19:12:12,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58023293 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 07:12:12, skipping insertion in model container [2019-11-06 19:12:12,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 07:12:12" (3/3) ... [2019-11-06 19:12:12,342 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem13_label20.c [2019-11-06 19:12:12,358 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 19:12:12,372 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 19:12:12,386 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 19:12:12,435 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 19:12:12,436 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 19:12:12,436 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 19:12:12,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 19:12:12,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 19:12:12,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 19:12:12,436 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 19:12:12,437 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 19:12:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1119 states. [2019-11-06 19:12:12,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 19:12:12,495 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:12,496 INFO L410 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] [2019-11-06 19:12:12,499 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:12,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1527050992, now seen corresponding path program 1 times [2019-11-06 19:12:12,514 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:12,514 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126673194] [2019-11-06 19:12:12,515 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:12,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:13,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:13,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126673194] [2019-11-06 19:12:13,028 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:13,028 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 19:12:13,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056429110] [2019-11-06 19:12:13,036 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-06 19:12:13,036 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-06 19:12:13,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-06 19:12:13,054 INFO L87 Difference]: Start difference. First operand 1119 states. Second operand 5 states. [2019-11-06 19:12:27,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 19:12:27,586 INFO L93 Difference]: Finished difference Result 4003 states and 7445 transitions. [2019-11-06 19:12:27,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 19:12:27,588 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-11-06 19:12:27,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 19:12:27,634 INFO L225 Difference]: With dead ends: 4003 [2019-11-06 19:12:27,634 INFO L226 Difference]: Without dead ends: 2795 [2019-11-06 19:12:27,646 INFO L630 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 [2019-11-06 19:12:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2795 states. [2019-11-06 19:12:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2795 to 2774. [2019-11-06 19:12:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2774 states. [2019-11-06 19:12:27,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2774 states to 2774 states and 4739 transitions. [2019-11-06 19:12:27,837 INFO L78 Accepts]: Start accepts. Automaton has 2774 states and 4739 transitions. Word has length 61 [2019-11-06 19:12:27,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 19:12:27,837 INFO L462 AbstractCegarLoop]: Abstraction has 2774 states and 4739 transitions. [2019-11-06 19:12:27,838 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-06 19:12:27,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2774 states and 4739 transitions. [2019-11-06 19:12:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-11-06 19:12:27,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 19:12:27,845 INFO L410 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] [2019-11-06 19:12:27,845 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 19:12:27,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 19:12:27,846 INFO L82 PathProgramCache]: Analyzing trace with hash 430477289, now seen corresponding path program 1 times [2019-11-06 19:12:27,846 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 19:12:27,846 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700142613] [2019-11-06 19:12:27,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 19:12:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 19:12:28,237 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 19:12:28,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700142613] [2019-11-06 19:12:28,238 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 19:12:28,238 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 19:12:28,239 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857186996] [2019-11-06 19:12:28,244 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 19:12:28,244 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 19:12:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 19:12:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 19:12:28,245 INFO L87 Difference]: Start difference. First operand 2774 states and 4739 transitions. Second operand 8 states.