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 0.1.24-13a467a-m [2019-10-14 22:00:24,965 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:00:24,967 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:00:24,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:00:24,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:00:24,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:00:24,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:00:24,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:00:24,992 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:00:24,993 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:00:24,994 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:00:24,995 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:00:24,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:00:24,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:00:24,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:00:24,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:00:24,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:00:25,000 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:00:25,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:00:25,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:00:25,005 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:00:25,006 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:00:25,007 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:00:25,008 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:00:25,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:00:25,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:00:25,013 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:00:25,014 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:00:25,015 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:00:25,016 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:00:25,016 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:00:25,017 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:00:25,017 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:00:25,017 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:00:25,018 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:00:25,019 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:00:25,019 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 22:00:25,043 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:00:25,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:00:25,046 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:00:25,046 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:00:25,046 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:00:25,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:00:25,047 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:00:25,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:00:25,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:00:25,047 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:00:25,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:00:25,049 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:00:25,049 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:00:25,049 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:00:25,050 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:00:25,050 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:00:25,050 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:00:25,050 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:00:25,050 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:00:25,051 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:00:25,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:00:25,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:00:25,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:00:25,052 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:00:25,052 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:00:25,052 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:00:25,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:00:25,053 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:00:25,053 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:00:25,360 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:00:25,372 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:00:25,376 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:00:25,378 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:00:25,378 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:00:25,379 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-14 22:00:25,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73511312b/bf36305e98944b99a623bf0e098252b7/FLAGcbec884bf [2019-10-14 22:00:26,193 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:00:26,194 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label29.c [2019-10-14 22:00:26,225 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73511312b/bf36305e98944b99a623bf0e098252b7/FLAGcbec884bf [2019-10-14 22:00:26,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73511312b/bf36305e98944b99a623bf0e098252b7 [2019-10-14 22:00:26,336 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:00:26,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:00:26,341 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:26,342 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:00:26,345 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:00:26,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:26" (1/1) ... [2019-10-14 22:00:26,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5efb01e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:26, skipping insertion in model container [2019-10-14 22:00:26,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:00:26" (1/1) ... [2019-10-14 22:00:26,360 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:00:26,519 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:00:27,966 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:27,978 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:00:28,745 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:00:28,776 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:00:28,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28 WrapperNode [2019-10-14 22:00:28,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:00:28,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:00:28,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:00:28,779 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:00:28,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:28,794 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:28,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:28,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:28,958 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:28,991 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:29,012 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (1/1) ... [2019-10-14 22:00:29,050 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:00:29,051 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:00:29,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:00:29,051 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:00:29,052 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (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 22:00:29,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:00:29,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:00:29,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:00:29,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:00:29,131 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:00:29,133 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-14 22:00:29,133 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:00:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:00:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:00:29,134 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:00:29,135 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-14 22:00:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:00:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:00:29,136 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:00:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:00:29,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:00:29,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:00:34,437 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:00:34,437 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:00:34,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:34 BoogieIcfgContainer [2019-10-14 22:00:34,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:00:34,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:00:34,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:00:34,445 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:00:34,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:00:26" (1/3) ... [2019-10-14 22:00:34,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14847e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:34, skipping insertion in model container [2019-10-14 22:00:34,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:00:28" (2/3) ... [2019-10-14 22:00:34,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d14847e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:00:34, skipping insertion in model container [2019-10-14 22:00:34,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:00:34" (3/3) ... [2019-10-14 22:00:34,449 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label29.c [2019-10-14 22:00:34,459 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:00:34,470 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:00:34,481 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:00:34,516 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:00:34,516 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:00:34,516 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:00:34,516 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:00:34,516 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:00:34,517 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:00:34,517 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:00:34,517 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:00:34,552 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-14 22:00:34,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-10-14 22:00:34,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:34,562 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] [2019-10-14 22:00:34,565 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:34,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:34,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1364317718, now seen corresponding path program 1 times [2019-10-14 22:00:34,580 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:34,581 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865241323] [2019-10-14 22:00:34,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:34,581 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:34,582 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:34,968 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 22:00:34,969 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865241323] [2019-10-14 22:00:34,970 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:34,970 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:00:34,971 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805157393] [2019-10-14 22:00:34,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:00:34,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:00:34,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:00:34,993 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-14 22:00:48,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:00:48,937 INFO L93 Difference]: Finished difference Result 3269 states and 6302 transitions. [2019-10-14 22:00:48,938 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:00:48,939 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 61 [2019-10-14 22:00:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:00:48,980 INFO L225 Difference]: With dead ends: 3269 [2019-10-14 22:00:48,981 INFO L226 Difference]: Without dead ends: 2346 [2019-10-14 22:00:48,995 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 22:00:49,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2346 states. [2019-10-14 22:00:49,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2346 to 2342. [2019-10-14 22:00:49,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2342 states. [2019-10-14 22:00:49,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2342 states to 2342 states and 3696 transitions. [2019-10-14 22:00:49,189 INFO L78 Accepts]: Start accepts. Automaton has 2342 states and 3696 transitions. Word has length 61 [2019-10-14 22:00:49,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:00:49,191 INFO L462 AbstractCegarLoop]: Abstraction has 2342 states and 3696 transitions. [2019-10-14 22:00:49,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:00:49,191 INFO L276 IsEmpty]: Start isEmpty. Operand 2342 states and 3696 transitions. [2019-10-14 22:00:49,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-14 22:00:49,210 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:00:49,211 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] [2019-10-14 22:00:49,211 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:00:49,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:00:49,212 INFO L82 PathProgramCache]: Analyzing trace with hash 921108326, now seen corresponding path program 1 times [2019-10-14 22:00:49,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:00:49,216 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181777978] [2019-10-14 22:00:49,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:49,217 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:00:49,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:00:49,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:49,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:00:49,580 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:00:49,580 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181777978] [2019-10-14 22:00:49,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:00:49,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-14 22:00:49,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318680993] [2019-10-14 22:00:49,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 22:00:49,584 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:00:49,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 22:00:49,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:00:49,584 INFO L87 Difference]: Start difference. First operand 2342 states and 3696 transitions. Second operand 7 states. [2019-10-14 22:01:01,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:01:01,153 INFO L93 Difference]: Finished difference Result 7144 states and 11393 transitions. [2019-10-14 22:01:01,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 22:01:01,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 141 [2019-10-14 22:01:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:01:01,184 INFO L225 Difference]: With dead ends: 7144 [2019-10-14 22:01:01,184 INFO L226 Difference]: Without dead ends: 4808 [2019-10-14 22:01:01,191 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 [2019-10-14 22:01:01,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4808 states. [2019-10-14 22:01:01,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4808 to 4737. [2019-10-14 22:01:01,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4737 states. [2019-10-14 22:01:01,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4737 states to 4737 states and 6854 transitions. [2019-10-14 22:01:01,352 INFO L78 Accepts]: Start accepts. Automaton has 4737 states and 6854 transitions. Word has length 141 [2019-10-14 22:01:01,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:01:01,355 INFO L462 AbstractCegarLoop]: Abstraction has 4737 states and 6854 transitions. [2019-10-14 22:01:01,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 22:01:01,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4737 states and 6854 transitions. [2019-10-14 22:01:01,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-10-14 22:01:01,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:01:01,362 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] [2019-10-14 22:01:01,362 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:01:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:01:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 2074427823, now seen corresponding path program 1 times [2019-10-14 22:01:01,363 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:01:01,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040939624] [2019-10-14 22:01:01,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:01,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:01:01,364 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:01:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:01,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:01:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 54 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:01:01,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040939624] [2019-10-14 22:01:01,749 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:01:01,753 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:01:01,754 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039222728] [2019-10-14 22:01:01,756 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:01:01,757 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:01:01,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:01:01,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:01:01,763 INFO L87 Difference]: Start difference. First operand 4737 states and 6854 transitions. Second operand 9 states.