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_label33.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:00:30,377 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:00:30,379 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:00:30,397 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:00:30,397 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:00:30,399 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:00:30,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:00:30,411 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:00:30,415 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:00:30,418 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:00:30,420 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:00:30,421 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:00:30,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:00:30,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:00:30,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:00:30,427 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:00:30,428 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:00:30,429 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:00:30,430 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:00:30,435 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:00:30,439 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:00:30,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:00:30,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:00:30,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:00:30,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:00:30,453 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:00:30,455 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:00:30,456 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:00:30,457 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:00:30,459 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:00:30,459 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:00:30,459 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:00:30,460 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:00:30,460 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:00:30,463 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:00:30,464 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:00:30,465 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 22:00:30,498 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:00:30,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:00:30,502 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:00:30,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:00:30,503 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:00:30,503 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:00:30,503 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:00:30,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:00:30,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:00:30,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:00:30,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:00:30,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:00:30,504 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:00:30,505 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:00:30,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:00:30,505 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:00:30,509 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:00:30,509 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:00:30,510 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:00:30,510 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:00:30,510 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:00:30,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:00:30,510 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:00:30,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:00:30,784 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:00:30,794 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:00:30,804 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:00:30,806 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:00:30,806 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:00:30,806 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-10-14 22:00:30,886 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada10f48f/7f0ffd5634ee49d89d9ab2cadd17189c/FLAG8f9d457ed [2019-10-14 22:00:31,706 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:00:31,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label33.c [2019-10-14 22:00:31,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada10f48f/7f0ffd5634ee49d89d9ab2cadd17189c/FLAG8f9d457ed [2019-10-14 22:00:31,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ada10f48f/7f0ffd5634ee49d89d9ab2cadd17189c [2019-10-14 22:00:31,819 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:00:31,821 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:00:31,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:31,824 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:00:31,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:00:31,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:31" (1/1) ... [2019-10-14 22:00:31,833 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@191613fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:31, skipping insertion in model container [2019-10-14 22:00:31,834 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:31" (1/1) ... [2019-10-14 22:00:31,842 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:00:32,006 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:00:33,517 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:33,523 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:00:34,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:34,218 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:00:34,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34 WrapperNode [2019-10-14 22:00:34,219 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:34,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:00:34,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:00:34,220 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:00:34,234 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,234 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,277 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,277 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,406 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,470 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (1/1) ... [2019-10-14 22:00:34,533 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:00:34,534 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:00:34,534 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:00:34,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:00:34,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (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 22:00:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:00:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:00:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:00:34,608 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:00:34,609 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:00:34,609 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-14 22:00:34,609 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:00:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:00:34,609 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:00:34,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:00:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:00:34,611 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:00:39,552 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:00:39,552 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:00:39,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:39 BoogieIcfgContainer [2019-10-14 22:00:39,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:00:39,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:00:39,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:00:39,561 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:00:39,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:00:31" (1/3) ... [2019-10-14 22:00:39,562 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b54280d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:39, skipping insertion in model container [2019-10-14 22:00:39,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:34" (2/3) ... [2019-10-14 22:00:39,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b54280d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:39, skipping insertion in model container [2019-10-14 22:00:39,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:39" (3/3) ... [2019-10-14 22:00:39,565 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label33.c [2019-10-14 22:00:39,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:00:39,590 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:00:39,608 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:00:39,648 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:00:39,648 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:00:39,648 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:00:39,648 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:00:39,649 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:00:39,649 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:00:39,649 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:00:39,649 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:00:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-14 22:00:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-10-14 22:00:39,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:39,701 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] [2019-10-14 22:00:39,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:39,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1837034062, now seen corresponding path program 1 times [2019-10-14 22:00:39,725 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:39,726 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710127912] [2019-10-14 22:00:39,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:39,726 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:39,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:39,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:40,158 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 22:00:40,159 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710127912] [2019-10-14 22:00:40,160 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:40,160 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:00:40,161 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930793639] [2019-10-14 22:00:40,166 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:40,166 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:40,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:00:40,183 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-14 22:00:53,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:53,203 INFO L93 Difference]: Finished difference Result 3269 states and 6302 transitions. [2019-10-14 22:00:53,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:00:53,206 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 55 [2019-10-14 22:00:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:53,244 INFO L225 Difference]: With dead ends: 3269 [2019-10-14 22:00:53,244 INFO L226 Difference]: Without dead ends: 2346 [2019-10-14 22:00:53,258 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 22:00:53,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-14 22:00:53,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2342. [2019-10-14 22:00:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2342 states. [2019-10-14 22:00:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3858 transitions. [2019-10-14 22:00:53,451 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3858 transitions. Word has length 55 [2019-10-14 22:00:53,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:53,452 INFO L462 AbstractCegarLoop]: Abstraction has 2342 states and 3858 transitions. [2019-10-14 22:00:53,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:53,452 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3858 transitions. [2019-10-14 22:00:53,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 22:00:53,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:53,461 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:00:53,461 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:53,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1114761445, now seen corresponding path program 1 times [2019-10-14 22:00:53,462 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:53,463 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437832314] [2019-10-14 22:00:53,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:53,463 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:53,463 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:53,902 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:53,902 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437832314] [2019-10-14 22:00:53,902 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:53,903 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:00:53,903 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894851178] [2019-10-14 22:00:53,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:00:53,905 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:53,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:00:53,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:00:53,906 INFO L87 Difference]: Start difference. First operand 2342 states and 3858 transitions. Second operand 9 states. [2019-10-14 22:01:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:08,172 INFO L93 Difference]: Finished difference Result 9505 states and 16081 transitions. [2019-10-14 22:01:08,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:01:08,172 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 154 [2019-10-14 22:01:08,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:08,223 INFO L225 Difference]: With dead ends: 9505 [2019-10-14 22:01:08,224 INFO L226 Difference]: Without dead ends: 7169 [2019-10-14 22:01:08,233 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:01:08,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states.