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_label18.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:16,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:16,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:16,950 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:16,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:16,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:16,952 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:16,954 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:16,956 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:16,957 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:16,957 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:16,959 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:16,959 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:16,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:16,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:16,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:16,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:16,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:16,965 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:16,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:16,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:16,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:16,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:16,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:16,974 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:16,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:16,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:16,978 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:16,979 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:16,980 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:16,980 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:16,981 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:16,981 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:16,981 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:16,982 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:16,983 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:16,983 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 18:01:17,000 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:17,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:17,001 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:17,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:17,002 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:17,002 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:17,002 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:17,002 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:17,002 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:17,003 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:17,003 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:17,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:17,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:17,003 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:17,004 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:17,004 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:17,004 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:17,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:17,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:17,005 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:17,005 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:17,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:17,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:17,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:17,006 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:17,006 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:17,006 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:17,006 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:17,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:17,275 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:17,288 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:17,291 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:17,293 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:17,293 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:17,294 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-13 18:01:17,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd18dff40/e433bae56fdb4c75a628d612f64f22a8/FLAG9740402f2 [2019-10-13 18:01:18,156 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:18,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label18.c [2019-10-13 18:01:18,201 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd18dff40/e433bae56fdb4c75a628d612f64f22a8/FLAG9740402f2 [2019-10-13 18:01:18,697 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cd18dff40/e433bae56fdb4c75a628d612f64f22a8 [2019-10-13 18:01:18,707 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:18,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:18,710 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:18,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:18,714 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:18,715 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:18" (1/1) ... [2019-10-13 18:01:18,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32777701 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:18, skipping insertion in model container [2019-10-13 18:01:18,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:18" (1/1) ... [2019-10-13 18:01:18,726 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:18,872 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:20,294 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:20,305 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:21,095 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:21,126 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:21,127 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21 WrapperNode [2019-10-13 18:01:21,127 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:21,128 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:21,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:21,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:21,142 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,143 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,197 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,279 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,309 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,330 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (1/1) ... [2019-10-13 18:01:21,354 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:21,355 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:21,355 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:21,355 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:21,357 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (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 18:01:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:01:26,272 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:01:26,273 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:01:26,275 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:26 BoogieIcfgContainer [2019-10-13 18:01:26,275 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:01:26,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:01:26,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:01:26,279 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:01:26,280 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:18" (1/3) ... [2019-10-13 18:01:26,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772480c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:26, skipping insertion in model container [2019-10-13 18:01:26,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21" (2/3) ... [2019-10-13 18:01:26,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@772480c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:01:26, skipping insertion in model container [2019-10-13 18:01:26,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:26" (3/3) ... [2019-10-13 18:01:26,284 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label18.c [2019-10-13 18:01:26,294 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:01:26,305 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:01:26,316 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:01:26,361 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:01:26,361 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:01:26,361 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:01:26,361 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:01:26,361 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:01:26,362 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:01:26,362 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:01:26,362 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:01:26,399 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:01:26,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-13 18:01:26,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:26,409 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] [2019-10-13 18:01:26,411 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:26,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:26,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1489686398, now seen corresponding path program 1 times [2019-10-13 18:01:26,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:26,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938385007] [2019-10-13 18:01:26,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:26,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:26,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:26,851 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 18:01:26,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938385007] [2019-10-13 18:01:26,853 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:26,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:01:26,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621215374] [2019-10-13 18:01:26,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:26,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:26,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:26,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:26,877 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:01:35,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:35,202 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-10-13 18:01:35,202 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:01:35,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 59 [2019-10-13 18:01:35,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:35,238 INFO L225 Difference]: With dead ends: 2471 [2019-10-13 18:01:35,238 INFO L226 Difference]: Without dead ends: 1568 [2019-10-13 18:01:35,250 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:01:35,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-10-13 18:01:35,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-10-13 18:01:35,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-10-13 18:01:35,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2833 transitions. [2019-10-13 18:01:35,412 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2833 transitions. Word has length 59 [2019-10-13 18:01:35,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:35,414 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2833 transitions. [2019-10-13 18:01:35,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2833 transitions. [2019-10-13 18:01:35,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 18:01:35,429 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:35,429 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, 1, 1, 1, 1, 1, 1, 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 18:01:35,429 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:35,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1403229591, now seen corresponding path program 1 times [2019-10-13 18:01:35,431 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:35,431 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927468788] [2019-10-13 18:01:35,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:35,431 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:35,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:35,780 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:35,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927468788] [2019-10-13 18:01:35,781 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:35,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:01:35,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136139114] [2019-10-13 18:01:35,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:35,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:35,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:35,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:35,785 INFO L87 Difference]: Start difference. First operand 1553 states and 2833 transitions. Second operand 8 states. [2019-10-13 18:01:47,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:47,976 INFO L93 Difference]: Finished difference Result 4751 states and 8585 transitions. [2019-10-13 18:01:47,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:01:47,976 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 132 [2019-10-13 18:01:47,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:47,996 INFO L225 Difference]: With dead ends: 4751 [2019-10-13 18:01:47,996 INFO L226 Difference]: Without dead ends: 3204 [2019-10-13 18:01:48,001 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:01:48,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2019-10-13 18:01:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3149. [2019-10-13 18:01:48,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2019-10-13 18:01:48,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4657 transitions. [2019-10-13 18:01:48,102 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4657 transitions. Word has length 132 [2019-10-13 18:01:48,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:48,103 INFO L462 AbstractCegarLoop]: Abstraction has 3149 states and 4657 transitions. [2019-10-13 18:01:48,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:01:48,104 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4657 transitions. [2019-10-13 18:01:48,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 18:01:48,106 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:48,106 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, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:01:48,106 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:48,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:48,107 INFO L82 PathProgramCache]: Analyzing trace with hash -612385541, now seen corresponding path program 1 times [2019-10-13 18:01:48,107 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:48,107 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967428894] [2019-10-13 18:01:48,107 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:48,108 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:48,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:48,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,347 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:48,347 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967428894] [2019-10-13 18:01:48,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401463848] [2019-10-13 18:01:48,351 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:01:48,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:01:48,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:01:48,592 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:48,592 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:01:48,593 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377424928] [2019-10-13 18:01:48,594 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:48,594 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:48,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:48,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:48,595 INFO L87 Difference]: Start difference. First operand 3149 states and 4657 transitions. Second operand 8 states.