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_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:01:17,912 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:01:17,915 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:01:17,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:01:17,927 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:01:17,928 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:01:17,930 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:01:17,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:01:17,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:01:17,934 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:01:17,935 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:01:17,936 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:01:17,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:01:17,937 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:01:17,938 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:01:17,939 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:01:17,940 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:01:17,941 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:01:17,943 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:01:17,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:01:17,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:01:17,947 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:01:17,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:01:17,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:01:17,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:01:17,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:01:17,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:01:17,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:01:17,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:01:17,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:01:17,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:01:17,963 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:01:17,964 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:01:17,964 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:01:17,965 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:01:17,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:01:17,969 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 18:01:17,989 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:01:17,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:01:17,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:01:17,992 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:01:17,992 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:01:17,992 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:01:17,993 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:01:17,993 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:01:17,993 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:01:17,993 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:01:17,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:01:17,994 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:01:17,994 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:01:17,995 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:01:17,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:01:17,995 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:01:17,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:01:17,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:01:17,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:01:17,996 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:01:17,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:01:17,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:01:17,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:01:17,997 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:01:17,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:01:17,998 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:01:17,998 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:01:17,998 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:01:17,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:01:18,304 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:01:18,324 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:01:18,328 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:01:18,329 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:01:18,330 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:01:18,330 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-13 18:01:18,397 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/412f9f084/d7da238036b048ee8ef2ef8bb10f78e7/FLAGd3c28e87b [2019-10-13 18:01:19,101 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:01:19,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem12_label20.c [2019-10-13 18:01:19,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/412f9f084/d7da238036b048ee8ef2ef8bb10f78e7/FLAGd3c28e87b [2019-10-13 18:01:19,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/412f9f084/d7da238036b048ee8ef2ef8bb10f78e7 [2019-10-13 18:01:19,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:01:19,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:01:19,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:19,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:01:19,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:01:19,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:19" (1/1) ... [2019-10-13 18:01:19,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d2b86e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:19, skipping insertion in model container [2019-10-13 18:01:19,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:01:19" (1/1) ... [2019-10-13 18:01:19,673 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:01:19,816 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:01:21,355 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:21,360 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:01:21,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:01:21,949 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:01:21,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:01:21 WrapperNode [2019-10-13 18:01:21,949 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:01:21,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:01:21,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:01:21,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:01:21,967 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 18:01:21,967 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 18:01:22,030 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 18:01:22,032 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 18:01:22,135 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 18:01:22,161 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 18:01:22,189 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 18:01:22,227 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:01:22,228 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:01:22,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:01:22,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:01:22,229 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 18:01:22,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:01:22,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:01:22,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:01:22,299 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-13 18:01:22,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-13 18:01:22,300 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output4 [2019-10-13 18:01:22,300 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:01:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:01:22,300 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-13 18:01:22,301 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-13 18:01:22,302 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output4 [2019-10-13 18:01:22,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:01:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:01:22,304 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:01:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:01:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:01:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:01:26,724 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:01:26,725 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:01:26,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:01:26 BoogieIcfgContainer [2019-10-13 18:01:26,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:01:26,729 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:01:26,729 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:01:26,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:01:26,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:01:19" (1/3) ... [2019-10-13 18:01:26,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6196a5b0 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 18:01:26,733 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 18:01:26,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6196a5b0 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 18:01:26,734 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 18:01:26,735 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem12_label20.c [2019-10-13 18:01:26,744 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:01:26,752 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:01:26,763 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:01:26,795 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:01:26,795 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:01:26,795 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:01:26,796 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:01:26,796 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:01:26,796 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:01:26,796 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:01:26,796 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:01:26,828 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states. [2019-10-13 18:01:26,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 18:01:26,834 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:26,835 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:01:26,836 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:26,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:26,842 INFO L82 PathProgramCache]: Analyzing trace with hash 326484869, now seen corresponding path program 1 times [2019-10-13 18:01:26,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:26,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069475189] [2019-10-13 18:01:26,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:26,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:26,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:27,210 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 18:01:27,210 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069475189] [2019-10-13 18:01:27,211 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:27,211 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:01:27,212 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476360269] [2019-10-13 18:01:27,216 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:01:27,216 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:27,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:01:27,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:01:27,233 INFO L87 Difference]: Start difference. First operand 839 states. Second operand 5 states. [2019-10-13 18:01:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:35,826 INFO L93 Difference]: Finished difference Result 2471 states and 4736 transitions. [2019-10-13 18:01:35,828 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 18:01:35,830 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2019-10-13 18:01:35,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:35,874 INFO L225 Difference]: With dead ends: 2471 [2019-10-13 18:01:35,875 INFO L226 Difference]: Without dead ends: 1568 [2019-10-13 18:01:35,891 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 18:01:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2019-10-13 18:01:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1553. [2019-10-13 18:01:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1553 states. [2019-10-13 18:01:36,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1553 states to 1553 states and 2833 transitions. [2019-10-13 18:01:36,093 INFO L78 Accepts]: Start accepts. Automaton has 1553 states and 2833 transitions. Word has length 18 [2019-10-13 18:01:36,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:36,094 INFO L462 AbstractCegarLoop]: Abstraction has 1553 states and 2833 transitions. [2019-10-13 18:01:36,094 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:01:36,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1553 states and 2833 transitions. [2019-10-13 18:01:36,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2019-10-13 18:01:36,100 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:36,100 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2019-10-13 18:01:36,101 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:36,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:36,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1701778415, now seen corresponding path program 1 times [2019-10-13 18:01:36,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:36,102 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442285023] [2019-10-13 18:01:36,102 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:36,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:36,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:36,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:36,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:36,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:36,474 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:01:36,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442285023] [2019-10-13 18:01:36,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:01:36,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:01:36,475 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321405305] [2019-10-13 18:01:36,477 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:36,477 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:36,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:36,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:36,478 INFO L87 Difference]: Start difference. First operand 1553 states and 2833 transitions. Second operand 8 states. [2019-10-13 18:01:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:01:47,679 INFO L93 Difference]: Finished difference Result 4751 states and 8585 transitions. [2019-10-13 18:01:47,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:01:47,680 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 91 [2019-10-13 18:01:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:01:47,704 INFO L225 Difference]: With dead ends: 4751 [2019-10-13 18:01:47,705 INFO L226 Difference]: Without dead ends: 3204 [2019-10-13 18:01:47,711 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 18:01:47,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3204 states. [2019-10-13 18:01:47,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3204 to 3149. [2019-10-13 18:01:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3149 states. [2019-10-13 18:01:47,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3149 states to 3149 states and 4657 transitions. [2019-10-13 18:01:47,801 INFO L78 Accepts]: Start accepts. Automaton has 3149 states and 4657 transitions. Word has length 91 [2019-10-13 18:01:47,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:01:47,803 INFO L462 AbstractCegarLoop]: Abstraction has 3149 states and 4657 transitions. [2019-10-13 18:01:47,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:01:47,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3149 states and 4657 transitions. [2019-10-13 18:01:47,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-10-13 18:01:47,811 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:01:47,811 INFO L380 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2019-10-13 18:01:47,812 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:01:47,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:01:47,813 INFO L82 PathProgramCache]: Analyzing trace with hash 2024884205, now seen corresponding path program 1 times [2019-10-13 18:01:47,813 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:01:47,813 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177320499] [2019-10-13 18:01:47,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:47,814 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:01:47,814 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:01:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:47,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:01:48,011 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177320499] [2019-10-13 18:01:48,012 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725622757] [2019-10-13 18:01:48,012 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 18:01:48,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:01:48,105 INFO L256 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 18:01:48,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:01:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-13 18:01:48,191 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:01:48,192 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-13 18:01:48,192 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314193111] [2019-10-13 18:01:48,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:01:48,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:01:48,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:01:48,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:01:48,195 INFO L87 Difference]: Start difference. First operand 3149 states and 4657 transitions. Second operand 8 states.