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/Problem18_label50.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:06:16,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:06:16,551 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:06:16,569 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:06:16,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:06:16,572 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:06:16,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:06:16,584 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:06:16,585 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:06:16,586 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:06:16,587 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:06:16,590 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:06:16,590 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:06:16,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:06:16,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:06:16,594 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:06:16,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:06:16,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:06:16,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:06:16,601 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:06:16,605 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:06:16,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:06:16,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:06:16,611 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:06:16,615 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:06:16,620 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:06:16,621 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:06:16,622 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:06:16,623 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:06:16,625 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:06:16,625 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:06:16,626 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:06:16,626 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:06:16,626 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:06:16,627 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:06:16,629 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:06:16,630 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 22:06:16,657 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:06:16,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:06:16,659 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:06:16,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:06:16,659 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:06:16,660 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:06:16,660 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:06:16,661 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:06:16,662 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:06:16,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:06:16,662 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:06:16,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:06:16,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:06:16,664 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:06:16,664 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:06:16,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:06:16,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:06:16,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:06:16,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:06:16,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:06:16,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:06:16,665 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:06:16,665 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:06:16,666 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:06:16,955 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:06:16,969 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:06:16,972 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:06:16,974 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:06:16,974 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:06:16,975 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-14 22:06:17,044 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a0fe4c6/59fb665c79b94d9e950e04f130e94f2e/FLAG74c662f48 [2019-10-14 22:06:17,790 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:06:17,791 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem18_label50.c [2019-10-14 22:06:17,819 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a0fe4c6/59fb665c79b94d9e950e04f130e94f2e/FLAG74c662f48 [2019-10-14 22:06:17,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56a0fe4c6/59fb665c79b94d9e950e04f130e94f2e [2019-10-14 22:06:17,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:06:17,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:06:17,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:06:17,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:06:17,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:06:17,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:06:17" (1/1) ... [2019-10-14 22:06:17,971 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f0c363c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:17, skipping insertion in model container [2019-10-14 22:06:17,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:06:17" (1/1) ... [2019-10-14 22:06:17,980 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:06:18,133 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:06:19,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:06:19,341 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:06:19,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:06:19,862 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:06:19,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19 WrapperNode [2019-10-14 22:06:19,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:06:19,864 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:06:19,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:06:19,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:06:19,880 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:19,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:19,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:19,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:20,023 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:20,049 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:20,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (1/1) ... [2019-10-14 22:06:20,094 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:06:20,094 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:06:20,094 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:06:20,095 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:06:20,096 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (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 22:06:20,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:06:20,169 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:06:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:06:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-14 22:06:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output3 [2019-10-14 22:06:20,170 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:06:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:06:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-14 22:06:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output3 [2019-10-14 22:06:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:06:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:06:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:06:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:06:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:06:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:06:23,949 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:06:23,949 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:06:23,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:06:23 BoogieIcfgContainer [2019-10-14 22:06:23,951 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:06:23,953 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:06:23,953 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:06:23,958 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:06:23,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:06:17" (1/3) ... [2019-10-14 22:06:23,959 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5a137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:06:23, skipping insertion in model container [2019-10-14 22:06:23,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:06:19" (2/3) ... [2019-10-14 22:06:23,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d5a137b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:06:23, skipping insertion in model container [2019-10-14 22:06:23,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:06:23" (3/3) ... [2019-10-14 22:06:23,962 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem18_label50.c [2019-10-14 22:06:23,974 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:06:23,984 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:06:23,998 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:06:24,038 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:06:24,039 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:06:24,039 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:06:24,039 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:06:24,039 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:06:24,040 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:06:24,040 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:06:24,040 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:06:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states. [2019-10-14 22:06:24,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 22:06:24,160 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:24,161 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:06:24,163 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:24,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:24,170 INFO L82 PathProgramCache]: Analyzing trace with hash 118737362, now seen corresponding path program 1 times [2019-10-14 22:06:24,179 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:24,180 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24878476] [2019-10-14 22:06:24,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:24,180 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:24,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:24,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:24,649 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 22:06:24,650 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24878476] [2019-10-14 22:06:24,650 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:24,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:06:24,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456744731] [2019-10-14 22:06:24,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:06:24,657 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:24,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:06:24,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:06:24,674 INFO L87 Difference]: Start difference. First operand 774 states. Second operand 5 states. [2019-10-14 22:06:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:34,403 INFO L93 Difference]: Finished difference Result 2984 states and 5769 transitions. [2019-10-14 22:06:34,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:06:34,405 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2019-10-14 22:06:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:34,442 INFO L225 Difference]: With dead ends: 2984 [2019-10-14 22:06:34,442 INFO L226 Difference]: Without dead ends: 2142 [2019-10-14 22:06:34,453 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:06:34,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2142 states. [2019-10-14 22:06:34,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2142 to 2135. [2019-10-14 22:06:34,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2135 states. [2019-10-14 22:06:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2135 states to 2135 states and 3571 transitions. [2019-10-14 22:06:34,630 INFO L78 Accepts]: Start accepts. Automaton has 2135 states and 3571 transitions. Word has length 69 [2019-10-14 22:06:34,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:34,631 INFO L462 AbstractCegarLoop]: Abstraction has 2135 states and 3571 transitions. [2019-10-14 22:06:34,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:06:34,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2135 states and 3571 transitions. [2019-10-14 22:06:34,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2019-10-14 22:06:34,640 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:34,641 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, 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 22:06:34,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:34,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:34,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1328569434, now seen corresponding path program 1 times [2019-10-14 22:06:34,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:34,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397599188] [2019-10-14 22:06:34,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:34,643 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:34,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:34,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:34,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:06:35,016 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397599188] [2019-10-14 22:06:35,017 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:06:35,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:06:35,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274433101] [2019-10-14 22:06:35,022 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:06:35,023 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:35,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:06:35,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:06:35,023 INFO L87 Difference]: Start difference. First operand 2135 states and 3571 transitions. Second operand 9 states. [2019-10-14 22:06:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:45,532 INFO L93 Difference]: Finished difference Result 8628 states and 14655 transitions. [2019-10-14 22:06:45,539 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:06:45,540 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 157 [2019-10-14 22:06:45,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:45,582 INFO L225 Difference]: With dead ends: 8628 [2019-10-14 22:06:45,582 INFO L226 Difference]: Without dead ends: 6499 [2019-10-14 22:06:45,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:06:45,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6499 states. [2019-10-14 22:06:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6499 to 5760. [2019-10-14 22:06:45,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5760 states. [2019-10-14 22:06:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 8589 transitions. [2019-10-14 22:06:45,829 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 8589 transitions. Word has length 157 [2019-10-14 22:06:45,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:45,833 INFO L462 AbstractCegarLoop]: Abstraction has 5760 states and 8589 transitions. [2019-10-14 22:06:45,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:06:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 8589 transitions. [2019-10-14 22:06:45,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2019-10-14 22:06:45,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:45,850 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1] [2019-10-14 22:06:45,852 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:45,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:45,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1461791282, now seen corresponding path program 1 times [2019-10-14 22:06:45,853 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:45,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391402264] [2019-10-14 22:06:45,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:45,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:45,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 124 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 22:06:46,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391402264] [2019-10-14 22:06:46,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542729940] [2019-10-14 22:06:46,328 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 [2019-10-14 22:06:46,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:46,459 INFO L256 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:06:46,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 132 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-10-14 22:06:46,823 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:06:46,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-14 22:06:46,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585900004] [2019-10-14 22:06:46,826 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:06:46,827 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:06:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-14 22:06:46,830 INFO L87 Difference]: Start difference. First operand 5760 states and 8589 transitions. Second operand 5 states. [2019-10-14 22:06:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:06:51,795 INFO L93 Difference]: Finished difference Result 13114 states and 19620 transitions. [2019-10-14 22:06:51,796 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:06:51,796 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 275 [2019-10-14 22:06:51,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:06:51,832 INFO L225 Difference]: With dead ends: 13114 [2019-10-14 22:06:51,833 INFO L226 Difference]: Without dead ends: 7360 [2019-10-14 22:06:51,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 274 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:06:51,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7360 states. [2019-10-14 22:06:52,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7360 to 7301. [2019-10-14 22:06:52,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7301 states. [2019-10-14 22:06:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7301 states to 7301 states and 9872 transitions. [2019-10-14 22:06:52,038 INFO L78 Accepts]: Start accepts. Automaton has 7301 states and 9872 transitions. Word has length 275 [2019-10-14 22:06:52,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:06:52,039 INFO L462 AbstractCegarLoop]: Abstraction has 7301 states and 9872 transitions. [2019-10-14 22:06:52,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:06:52,039 INFO L276 IsEmpty]: Start isEmpty. Operand 7301 states and 9872 transitions. [2019-10-14 22:06:52,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2019-10-14 22:06:52,047 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:06:52,047 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2019-10-14 22:06:52,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:06:52,253 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:06:52,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:06:52,254 INFO L82 PathProgramCache]: Analyzing trace with hash -289338541, now seen corresponding path program 1 times [2019-10-14 22:06:52,254 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:06:52,254 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739969969] [2019-10-14 22:06:52,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:52,255 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:06:52,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:06:52,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:52,676 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 122 proven. 8 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2019-10-14 22:06:52,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739969969] [2019-10-14 22:06:52,676 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990659711] [2019-10-14 22:06:52,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:06:52,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:06:52,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:06:52,812 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:06:53,088 INFO L134 CoverageAnalysis]: Checked inductivity of 246 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 22:06:53,089 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:06:53,089 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 9 [2019-10-14 22:06:53,091 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448577906] [2019-10-14 22:06:53,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:06:53,092 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:06:53,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:06:53,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:06:53,092 INFO L87 Difference]: Start difference. First operand 7301 states and 9872 transitions. Second operand 3 states.