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/Problem14_label47.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 22:02:16,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 22:02:16,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 22:02:16,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 22:02:16,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 22:02:16,892 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 22:02:16,894 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 22:02:16,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 22:02:16,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 22:02:16,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 22:02:16,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 22:02:16,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 22:02:16,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 22:02:16,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 22:02:16,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 22:02:16,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 22:02:16,911 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 22:02:16,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 22:02:16,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 22:02:16,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 22:02:16,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 22:02:16,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 22:02:16,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 22:02:16,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 22:02:16,921 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 22:02:16,923 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 22:02:16,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 22:02:16,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 22:02:16,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 22:02:16,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 22:02:16,927 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 22:02:16,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 22:02:16,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 22:02:16,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 22:02:16,928 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 22:02:16,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 22:02:16,930 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 22:02:16,943 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 22:02:16,944 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 22:02:16,945 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 22:02:16,945 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 22:02:16,945 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 22:02:16,946 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 22:02:16,946 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 22:02:16,946 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 22:02:16,946 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 22:02:16,946 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 22:02:16,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 22:02:16,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 22:02:16,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 22:02:16,947 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 22:02:16,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 22:02:16,948 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 22:02:16,948 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 22:02:16,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 22:02:16,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 22:02:16,948 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 22:02:16,949 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 22:02:16,949 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 22:02:16,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 22:02:16,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 22:02:16,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 22:02:16,950 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 22:02:16,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 22:02:16,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 22:02:16,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 22:02:17,208 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 22:02:17,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 22:02:17,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 22:02:17,233 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 22:02:17,233 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 22:02:17,234 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-14 22:02:17,319 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532f82aac/e6ca8a0fce9e41a9868d2686b22a5ee4/FLAG16288bc0f [2019-10-14 22:02:17,860 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 22:02:17,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label47.c [2019-10-14 22:02:17,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532f82aac/e6ca8a0fce9e41a9868d2686b22a5ee4/FLAG16288bc0f [2019-10-14 22:02:18,142 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/532f82aac/e6ca8a0fce9e41a9868d2686b22a5ee4 [2019-10-14 22:02:18,152 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 22:02:18,154 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 22:02:18,155 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:18,155 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 22:02:18,159 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 22:02:18,160 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:18,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be43138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18, skipping insertion in model container [2019-10-14 22:02:18,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:18,172 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 22:02:18,222 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 22:02:18,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:18,777 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 22:02:18,915 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 22:02:18,931 INFO L192 MainTranslator]: Completed translation [2019-10-14 22:02:18,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18 WrapperNode [2019-10-14 22:02:18,932 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 22:02:18,933 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 22:02:18,933 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 22:02:18,933 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 22:02:18,947 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:18,947 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:18,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:18,967 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:19,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:19,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:19,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (1/1) ... [2019-10-14 22:02:19,061 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 22:02:19,062 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 22:02:19,062 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 22:02:19,062 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 22:02:19,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (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 22:02:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 22:02:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 22:02:19,126 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-14 22:02:19,127 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 22:02:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-14 22:02:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 22:02:19,127 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 22:02:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-14 22:02:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 22:02:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 22:02:19,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 22:02:20,463 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 22:02:20,463 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-14 22:02:20,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:20 BoogieIcfgContainer [2019-10-14 22:02:20,465 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 22:02:20,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 22:02:20,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 22:02:20,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 22:02:20,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 10:02:18" (1/3) ... [2019-10-14 22:02:20,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf6db32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:20, skipping insertion in model container [2019-10-14 22:02:20,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 10:02:18" (2/3) ... [2019-10-14 22:02:20,473 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3cf6db32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 10:02:20, skipping insertion in model container [2019-10-14 22:02:20,474 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 10:02:20" (3/3) ... [2019-10-14 22:02:20,482 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label47.c [2019-10-14 22:02:20,493 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 22:02:20,502 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 22:02:20,513 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 22:02:20,555 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 22:02:20,556 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 22:02:20,557 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 22:02:20,558 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 22:02:20,558 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 22:02:20,558 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 22:02:20,558 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 22:02:20,558 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 22:02:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-14 22:02:20,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 22:02:20,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:20,602 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] [2019-10-14 22:02:20,604 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:20,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1824869262, now seen corresponding path program 1 times [2019-10-14 22:02:20,619 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:20,619 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060440960] [2019-10-14 22:02:20,619 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,620 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:20,620 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:20,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:20,916 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 22:02:20,917 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060440960] [2019-10-14 22:02:20,918 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:20,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 22:02:20,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547081456] [2019-10-14 22:02:20,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:20,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:20,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-14 22:02:20,941 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-14 22:02:23,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:23,420 INFO L93 Difference]: Finished difference Result 886 states and 1613 transitions. [2019-10-14 22:02:23,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 22:02:23,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 39 [2019-10-14 22:02:23,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:23,443 INFO L225 Difference]: With dead ends: 886 [2019-10-14 22:02:23,443 INFO L226 Difference]: Without dead ends: 564 [2019-10-14 22:02:23,460 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 2 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 22:02:23,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-14 22:02:23,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 558. [2019-10-14 22:02:23,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-14 22:02:23,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 906 transitions. [2019-10-14 22:02:23,579 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 906 transitions. Word has length 39 [2019-10-14 22:02:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:23,580 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 906 transitions. [2019-10-14 22:02:23,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:23,580 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 906 transitions. [2019-10-14 22:02:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-10-14 22:02:23,587 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:23,587 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:23,587 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:23,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:23,588 INFO L82 PathProgramCache]: Analyzing trace with hash 686981166, now seen corresponding path program 1 times [2019-10-14 22:02:23,588 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:23,588 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541664601] [2019-10-14 22:02:23,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,589 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:23,589 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:23,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:23,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:24,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:24,063 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541664601] [2019-10-14 22:02:24,064 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 22:02:24,064 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-14 22:02:24,064 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473203883] [2019-10-14 22:02:24,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:24,067 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:24,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:24,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:24,067 INFO L87 Difference]: Start difference. First operand 558 states and 906 transitions. Second operand 9 states. [2019-10-14 22:02:25,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:25,973 INFO L93 Difference]: Finished difference Result 1320 states and 2174 transitions. [2019-10-14 22:02:25,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 22:02:25,973 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 125 [2019-10-14 22:02:25,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:25,980 INFO L225 Difference]: With dead ends: 1320 [2019-10-14 22:02:25,980 INFO L226 Difference]: Without dead ends: 768 [2019-10-14 22:02:25,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:25,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2019-10-14 22:02:26,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 566. [2019-10-14 22:02:26,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 566 states. [2019-10-14 22:02:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 819 transitions. [2019-10-14 22:02:26,012 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 819 transitions. Word has length 125 [2019-10-14 22:02:26,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:26,013 INFO L462 AbstractCegarLoop]: Abstraction has 566 states and 819 transitions. [2019-10-14 22:02:26,013 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:26,013 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 819 transitions. [2019-10-14 22:02:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-14 22:02:26,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:26,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:02:26,017 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:26,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1152023485, now seen corresponding path program 1 times [2019-10-14 22:02:26,018 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:26,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680886255] [2019-10-14 22:02:26,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:26,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:26,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:26,223 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 31 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:26,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680886255] [2019-10-14 22:02:26,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363369388] [2019-10-14 22:02:26,224 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 22:02:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:26,304 INFO L256 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:26,313 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 22:02:26,378 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:26,378 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:26,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164603571] [2019-10-14 22:02:26,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:26,380 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:26,380 INFO L87 Difference]: Start difference. First operand 566 states and 819 transitions. Second operand 3 states. [2019-10-14 22:02:27,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:27,213 INFO L93 Difference]: Finished difference Result 1680 states and 2467 transitions. [2019-10-14 22:02:27,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:27,214 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 134 [2019-10-14 22:02:27,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:27,221 INFO L225 Difference]: With dead ends: 1680 [2019-10-14 22:02:27,221 INFO L226 Difference]: Without dead ends: 1120 [2019-10-14 22:02:27,223 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2019-10-14 22:02:27,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 934. [2019-10-14 22:02:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 934 states. [2019-10-14 22:02:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1279 transitions. [2019-10-14 22:02:27,256 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1279 transitions. Word has length 134 [2019-10-14 22:02:27,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:27,257 INFO L462 AbstractCegarLoop]: Abstraction has 934 states and 1279 transitions. [2019-10-14 22:02:27,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:27,257 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1279 transitions. [2019-10-14 22:02:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2019-10-14 22:02:27,263 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:27,263 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, 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, 1] [2019-10-14 22:02:27,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:27,469 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:27,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:27,470 INFO L82 PathProgramCache]: Analyzing trace with hash 2146210942, now seen corresponding path program 1 times [2019-10-14 22:02:27,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:27,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650724547] [2019-10-14 22:02:27,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:27,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:27,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 65 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:27,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650724547] [2019-10-14 22:02:27,834 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90594306] [2019-10-14 22:02:27,834 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 22:02:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:27,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:27,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:27,998 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2019-10-14 22:02:27,998 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:27,999 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 22:02:27,999 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302967212] [2019-10-14 22:02:28,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:28,000 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:28,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:28,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:28,001 INFO L87 Difference]: Start difference. First operand 934 states and 1279 transitions. Second operand 3 states. [2019-10-14 22:02:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:28,869 INFO L93 Difference]: Finished difference Result 2414 states and 3392 transitions. [2019-10-14 22:02:28,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:28,870 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 237 [2019-10-14 22:02:28,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:28,878 INFO L225 Difference]: With dead ends: 2414 [2019-10-14 22:02:28,878 INFO L226 Difference]: Without dead ends: 1486 [2019-10-14 22:02:28,880 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 242 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:28,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2019-10-14 22:02:28,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 1304. [2019-10-14 22:02:28,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1304 states. [2019-10-14 22:02:28,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1304 states to 1304 states and 1748 transitions. [2019-10-14 22:02:28,920 INFO L78 Accepts]: Start accepts. Automaton has 1304 states and 1748 transitions. Word has length 237 [2019-10-14 22:02:28,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:28,920 INFO L462 AbstractCegarLoop]: Abstraction has 1304 states and 1748 transitions. [2019-10-14 22:02:28,921 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:28,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1304 states and 1748 transitions. [2019-10-14 22:02:28,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2019-10-14 22:02:28,925 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:28,926 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, 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, 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] [2019-10-14 22:02:29,138 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,139 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:29,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:29,140 INFO L82 PathProgramCache]: Analyzing trace with hash -799167839, now seen corresponding path program 1 times [2019-10-14 22:02:29,140 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:29,140 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024920838] [2019-10-14 22:02:29,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,141 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:29,141 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:29,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 62 proven. 8 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2019-10-14 22:02:29,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024920838] [2019-10-14 22:02:29,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223304617] [2019-10-14 22:02:29,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:29,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:29,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 22:02:29,580 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:29,733 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2019-10-14 22:02:29,734 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:29,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 7 [2019-10-14 22:02:29,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827046205] [2019-10-14 22:02:29,735 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 22:02:29,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:29,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 22:02:29,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:29,736 INFO L87 Difference]: Start difference. First operand 1304 states and 1748 transitions. Second operand 3 states. [2019-10-14 22:02:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:30,519 INFO L93 Difference]: Finished difference Result 3156 states and 4351 transitions. [2019-10-14 22:02:30,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 22:02:30,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 256 [2019-10-14 22:02:30,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:30,532 INFO L225 Difference]: With dead ends: 3156 [2019-10-14 22:02:30,533 INFO L226 Difference]: Without dead ends: 1858 [2019-10-14 22:02:30,538 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-14 22:02:30,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2019-10-14 22:02:30,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1674. [2019-10-14 22:02:30,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1674 states. [2019-10-14 22:02:30,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 2298 transitions. [2019-10-14 22:02:30,602 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 2298 transitions. Word has length 256 [2019-10-14 22:02:30,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:30,603 INFO L462 AbstractCegarLoop]: Abstraction has 1674 states and 2298 transitions. [2019-10-14 22:02:30,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 22:02:30,603 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 2298 transitions. [2019-10-14 22:02:30,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-14 22:02:30,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:30,612 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, 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, 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] [2019-10-14 22:02:30,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:30,825 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:30,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:30,826 INFO L82 PathProgramCache]: Analyzing trace with hash 2008848013, now seen corresponding path program 1 times [2019-10-14 22:02:30,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:30,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268085239] [2019-10-14 22:02:30,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:30,827 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:30,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:30,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,251 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 22:02:31,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268085239] [2019-10-14 22:02:31,252 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546868988] [2019-10-14 22:02:31,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:31,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:31,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 22:02:31,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:31,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:31,549 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:02:31,550 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:31,550 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2019-10-14 22:02:31,550 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984038834] [2019-10-14 22:02:31,551 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:31,551 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:31,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:31,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:31,552 INFO L87 Difference]: Start difference. First operand 1674 states and 2298 transitions. Second operand 5 states. [2019-10-14 22:02:33,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:33,401 INFO L93 Difference]: Finished difference Result 3930 states and 5406 transitions. [2019-10-14 22:02:33,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:33,404 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 262 [2019-10-14 22:02:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:33,417 INFO L225 Difference]: With dead ends: 3930 [2019-10-14 22:02:33,417 INFO L226 Difference]: Without dead ends: 2262 [2019-10-14 22:02:33,422 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2019-10-14 22:02:33,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2019-10-14 22:02:33,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2070. [2019-10-14 22:02:33,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2070 states. [2019-10-14 22:02:33,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2070 states to 2070 states and 2743 transitions. [2019-10-14 22:02:33,489 INFO L78 Accepts]: Start accepts. Automaton has 2070 states and 2743 transitions. Word has length 262 [2019-10-14 22:02:33,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:33,490 INFO L462 AbstractCegarLoop]: Abstraction has 2070 states and 2743 transitions. [2019-10-14 22:02:33,490 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:33,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2070 states and 2743 transitions. [2019-10-14 22:02:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2019-10-14 22:02:33,497 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:33,498 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:33,701 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:33,702 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:33,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:33,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1769612725, now seen corresponding path program 1 times [2019-10-14 22:02:33,704 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:33,704 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382204215] [2019-10-14 22:02:33,704 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,705 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:33,705 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:33,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,162 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 106 proven. 262 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 22:02:35,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382204215] [2019-10-14 22:02:35,163 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116526306] [2019-10-14 22:02:35,164 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:35,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:35,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-14 22:02:35,273 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:35,343 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:35,547 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 289 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-14 22:02:35,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:35,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-14 22:02:35,548 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238968622] [2019-10-14 22:02:35,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 22:02:35,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:35,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 22:02:35,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:35,550 INFO L87 Difference]: Start difference. First operand 2070 states and 2743 transitions. Second operand 16 states. [2019-10-14 22:02:39,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:39,552 INFO L93 Difference]: Finished difference Result 4460 states and 5930 transitions. [2019-10-14 22:02:39,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 22:02:39,553 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 346 [2019-10-14 22:02:39,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:39,561 INFO L225 Difference]: With dead ends: 4460 [2019-10-14 22:02:39,561 INFO L226 Difference]: Without dead ends: 2349 [2019-10-14 22:02:39,566 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=254, Invalid=868, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 22:02:39,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2349 states. [2019-10-14 22:02:39,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2349 to 2268. [2019-10-14 22:02:39,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2268 states. [2019-10-14 22:02:39,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2268 states to 2268 states and 2754 transitions. [2019-10-14 22:02:39,630 INFO L78 Accepts]: Start accepts. Automaton has 2268 states and 2754 transitions. Word has length 346 [2019-10-14 22:02:39,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:39,630 INFO L462 AbstractCegarLoop]: Abstraction has 2268 states and 2754 transitions. [2019-10-14 22:02:39,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 22:02:39,631 INFO L276 IsEmpty]: Start isEmpty. Operand 2268 states and 2754 transitions. [2019-10-14 22:02:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2019-10-14 22:02:39,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:39,639 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:39,852 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:39,852 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:39,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:39,853 INFO L82 PathProgramCache]: Analyzing trace with hash -721277978, now seen corresponding path program 1 times [2019-10-14 22:02:39,853 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:39,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559521071] [2019-10-14 22:02:39,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,854 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:39,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:39,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,600 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 171 proven. 149 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2019-10-14 22:02:40,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559521071] [2019-10-14 22:02:40,601 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082474630] [2019-10-14 22:02:40,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:40,704 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 22:02:40,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:40,743 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-14 22:02:40,849 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2019-10-14 22:02:40,849 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 22:02:40,849 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [13] total 16 [2019-10-14 22:02:40,850 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859553608] [2019-10-14 22:02:40,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 22:02:40,851 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:40,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 22:02:40,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2019-10-14 22:02:40,851 INFO L87 Difference]: Start difference. First operand 2268 states and 2754 transitions. Second operand 5 states. [2019-10-14 22:02:41,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:41,884 INFO L93 Difference]: Finished difference Result 5098 states and 6238 transitions. [2019-10-14 22:02:41,889 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 22:02:41,890 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 371 [2019-10-14 22:02:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:41,901 INFO L225 Difference]: With dead ends: 5098 [2019-10-14 22:02:41,901 INFO L226 Difference]: Without dead ends: 2836 [2019-10-14 22:02:41,907 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 379 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2019-10-14 22:02:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2019-10-14 22:02:41,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 2832. [2019-10-14 22:02:41,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2832 states. [2019-10-14 22:02:41,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2832 states to 2832 states and 3446 transitions. [2019-10-14 22:02:41,971 INFO L78 Accepts]: Start accepts. Automaton has 2832 states and 3446 transitions. Word has length 371 [2019-10-14 22:02:41,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:41,972 INFO L462 AbstractCegarLoop]: Abstraction has 2832 states and 3446 transitions. [2019-10-14 22:02:41,972 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 22:02:41,972 INFO L276 IsEmpty]: Start isEmpty. Operand 2832 states and 3446 transitions. [2019-10-14 22:02:41,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2019-10-14 22:02:41,984 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:41,985 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:42,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:42,190 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:42,190 INFO L82 PathProgramCache]: Analyzing trace with hash -358273966, now seen corresponding path program 1 times [2019-10-14 22:02:42,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:42,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523507477] [2019-10-14 22:02:42,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:42,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:42,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 354 proven. 110 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-14 22:02:43,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523507477] [2019-10-14 22:02:43,130 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98103199] [2019-10-14 22:02:43,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:43,303 INFO L256 TraceCheckSpWp]: Trace formula consists of 740 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:43,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 645 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2019-10-14 22:02:43,423 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:43,423 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-14 22:02:43,423 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636162814] [2019-10-14 22:02:43,424 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 22:02:43,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:43,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 22:02:43,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-14 22:02:43,425 INFO L87 Difference]: Start difference. First operand 2832 states and 3446 transitions. Second operand 9 states. [2019-10-14 22:02:45,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:45,534 INFO L93 Difference]: Finished difference Result 5490 states and 6736 transitions. [2019-10-14 22:02:45,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 22:02:45,537 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 481 [2019-10-14 22:02:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:45,549 INFO L225 Difference]: With dead ends: 5490 [2019-10-14 22:02:45,549 INFO L226 Difference]: Without dead ends: 2846 [2019-10-14 22:02:45,555 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 494 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-14 22:02:45,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2019-10-14 22:02:45,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2842. [2019-10-14 22:02:45,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2842 states. [2019-10-14 22:02:45,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 3315 transitions. [2019-10-14 22:02:45,628 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 3315 transitions. Word has length 481 [2019-10-14 22:02:45,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:45,629 INFO L462 AbstractCegarLoop]: Abstraction has 2842 states and 3315 transitions. [2019-10-14 22:02:45,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 22:02:45,629 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 3315 transitions. [2019-10-14 22:02:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2019-10-14 22:02:45,645 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:45,646 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:45,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:45,851 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:45,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:45,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1024360186, now seen corresponding path program 1 times [2019-10-14 22:02:45,852 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:45,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637735264] [2019-10-14 22:02:45,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:45,853 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:45,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:45,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 478 proven. 118 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2019-10-14 22:02:47,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637735264] [2019-10-14 22:02:47,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512868160] [2019-10-14 22:02:47,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:47,581 INFO L256 TraceCheckSpWp]: Trace formula consists of 863 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 22:02:47,589 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:47,623 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-14 22:02:48,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1154 backedges. 848 proven. 2 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2019-10-14 22:02:48,308 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:48,308 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-14 22:02:48,308 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167685702] [2019-10-14 22:02:48,310 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 22:02:48,310 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:48,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 22:02:48,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-14 22:02:48,311 INFO L87 Difference]: Start difference. First operand 2842 states and 3315 transitions. Second operand 12 states. [2019-10-14 22:02:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 22:02:50,493 INFO L93 Difference]: Finished difference Result 5780 states and 6763 transitions. [2019-10-14 22:02:50,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 22:02:50,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 565 [2019-10-14 22:02:50,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 22:02:50,502 INFO L225 Difference]: With dead ends: 5780 [2019-10-14 22:02:50,503 INFO L226 Difference]: Without dead ends: 3085 [2019-10-14 22:02:50,510 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 584 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-14 22:02:50,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3085 states. [2019-10-14 22:02:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3085 to 2834. [2019-10-14 22:02:50,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2834 states. [2019-10-14 22:02:50,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2834 states to 2834 states and 3182 transitions. [2019-10-14 22:02:50,570 INFO L78 Accepts]: Start accepts. Automaton has 2834 states and 3182 transitions. Word has length 565 [2019-10-14 22:02:50,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 22:02:50,571 INFO L462 AbstractCegarLoop]: Abstraction has 2834 states and 3182 transitions. [2019-10-14 22:02:50,571 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 22:02:50,571 INFO L276 IsEmpty]: Start isEmpty. Operand 2834 states and 3182 transitions. [2019-10-14 22:02:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2019-10-14 22:02:50,578 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 22:02:50,579 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 22:02:50,783 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:50,784 INFO L410 AbstractCegarLoop]: === Iteration 11 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 22:02:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 22:02:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1305863078, now seen corresponding path program 2 times [2019-10-14 22:02:50,785 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 22:02:50,785 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044520693] [2019-10-14 22:02:50,786 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:50,787 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 22:02:50,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 22:02:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:50,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 22:02:51,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 701 proven. 235 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2019-10-14 22:02:51,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044520693] [2019-10-14 22:02:51,638 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838877889] [2019-10-14 22:02:51,638 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 22:02:51,820 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 22:02:51,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 22:02:51,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 887 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 22:02:51,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 22:02:51,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 22:02:52,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1257 backedges. 900 proven. 2 refuted. 0 times theorem prover too weak. 355 trivial. 0 not checked. [2019-10-14 22:02:52,140 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 22:02:52,140 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-14 22:02:52,140 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538921513] [2019-10-14 22:02:52,141 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 22:02:52,142 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 22:02:52,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 22:02:52,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-14 22:02:52,142 INFO L87 Difference]: Start difference. First operand 2834 states and 3182 transitions. Second operand 17 states.