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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 18:02:47,888 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 18:02:47,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 18:02:47,909 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 18:02:47,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 18:02:47,910 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 18:02:47,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 18:02:47,914 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 18:02:47,919 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 18:02:47,920 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 18:02:47,921 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 18:02:47,922 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 18:02:47,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 18:02:47,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 18:02:47,928 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 18:02:47,929 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 18:02:47,930 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 18:02:47,931 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 18:02:47,933 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 18:02:47,935 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 18:02:47,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 18:02:47,937 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 18:02:47,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 18:02:47,939 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 18:02:47,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 18:02:47,944 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 18:02:47,945 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 18:02:47,946 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 18:02:47,947 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 18:02:47,948 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 18:02:47,948 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 18:02:47,949 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 18:02:47,949 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 18:02:47,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 18:02:47,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 18:02:47,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 18:02:47,952 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 18:02:47,966 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 18:02:47,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 18:02:47,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 18:02:47,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 18:02:47,968 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 18:02:47,968 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 18:02:47,969 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 18:02:47,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 18:02:47,969 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 18:02:47,969 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 18:02:47,969 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 18:02:47,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 18:02:47,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 18:02:47,970 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 18:02:47,970 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 18:02:47,970 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 18:02:47,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 18:02:47,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 18:02:47,971 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 18:02:47,971 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 18:02:47,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 18:02:47,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:47,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 18:02:47,972 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 18:02:47,972 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 18:02:47,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 18:02:47,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 18:02:47,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 18:02:47,973 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 18:02:48,267 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 18:02:48,285 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 18:02:48,288 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 18:02:48,290 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 18:02:48,290 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 18:02:48,291 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem14_label27.c [2019-10-13 18:02:48,362 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b08f914/9105a920b12546288681433cff3d71cc/FLAG6db881306 [2019-10-13 18:02:48,991 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 18:02:48,994 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem14_label27.c [2019-10-13 18:02:49,014 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b08f914/9105a920b12546288681433cff3d71cc/FLAG6db881306 [2019-10-13 18:02:49,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c4b08f914/9105a920b12546288681433cff3d71cc [2019-10-13 18:02:49,263 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 18:02:49,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 18:02:49,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:49,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 18:02:49,270 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 18:02:49,271 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:49" (1/1) ... [2019-10-13 18:02:49,274 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fe4d0c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:49, skipping insertion in model container [2019-10-13 18:02:49,274 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:02:49" (1/1) ... [2019-10-13 18:02:49,282 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 18:02:49,345 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 18:02:49,943 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:49,948 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 18:02:50,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 18:02:50,102 INFO L192 MainTranslator]: Completed translation [2019-10-13 18:02:50,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50 WrapperNode [2019-10-13 18:02:50,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 18:02:50,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 18:02:50,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 18:02:50,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 18:02:50,115 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,142 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,197 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,222 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,233 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... [2019-10-13 18:02:50,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 18:02:50,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 18:02:50,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 18:02:50,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 18:02:50,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 18:02:50,339 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 18:02:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 18:02:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-13 18:02:50,340 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 18:02:50,340 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-13 18:02:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 18:02:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 18:02:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-13 18:02:50,341 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 18:02:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 18:02:50,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 18:02:51,833 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 18:02:51,835 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-13 18:02:51,837 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:51 BoogieIcfgContainer [2019-10-13 18:02:51,837 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 18:02:51,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 18:02:51,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 18:02:51,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 18:02:51,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:02:49" (1/3) ... [2019-10-13 18:02:51,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebb5dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:51, skipping insertion in model container [2019-10-13 18:02:51,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:02:50" (2/3) ... [2019-10-13 18:02:51,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ebb5dbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:02:51, skipping insertion in model container [2019-10-13 18:02:51,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:02:51" (3/3) ... [2019-10-13 18:02:51,855 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem14_label27.c [2019-10-13 18:02:51,865 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 18:02:51,876 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 18:02:51,887 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 18:02:51,917 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 18:02:51,917 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 18:02:51,917 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 18:02:51,918 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 18:02:51,918 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 18:02:51,918 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 18:02:51,918 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 18:02:51,918 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 18:02:51,944 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states. [2019-10-13 18:02:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 18:02:51,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:51,952 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] [2019-10-13 18:02:51,955 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1433861154, now seen corresponding path program 1 times [2019-10-13 18:02:51,968 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:51,969 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616769346] [2019-10-13 18:02:51,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:51,969 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:51,969 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:52,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:52,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616769346] [2019-10-13 18:02:52,313 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:52,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 18:02:52,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770720574] [2019-10-13 18:02:52,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:02:52,320 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:52,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:02:52,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-13 18:02:52,343 INFO L87 Difference]: Start difference. First operand 254 states. Second operand 5 states. [2019-10-13 18:02:54,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:54,699 INFO L93 Difference]: Finished difference Result 886 states and 1611 transitions. [2019-10-13 18:02:54,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 18:02:54,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-10-13 18:02:54,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:54,723 INFO L225 Difference]: With dead ends: 886 [2019-10-13 18:02:54,723 INFO L226 Difference]: Without dead ends: 564 [2019-10-13 18:02:54,732 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 [2019-10-13 18:02:54,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-10-13 18:02:54,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 560. [2019-10-13 18:02:54,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 560 states. [2019-10-13 18:02:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 848 transitions. [2019-10-13 18:02:54,881 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 848 transitions. Word has length 35 [2019-10-13 18:02:54,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:54,882 INFO L462 AbstractCegarLoop]: Abstraction has 560 states and 848 transitions. [2019-10-13 18:02:54,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:02:54,884 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 848 transitions. [2019-10-13 18:02:54,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-13 18:02:54,892 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:54,894 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:54,894 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:54,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:54,896 INFO L82 PathProgramCache]: Analyzing trace with hash 236047245, now seen corresponding path program 1 times [2019-10-13 18:02:54,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:54,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782742188] [2019-10-13 18:02:54,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:54,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:54,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:55,263 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:55,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782742188] [2019-10-13 18:02:55,264 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:55,264 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2019-10-13 18:02:55,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832701429] [2019-10-13 18:02:55,270 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:02:55,271 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:55,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:02:55,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:02:55,272 INFO L87 Difference]: Start difference. First operand 560 states and 848 transitions. Second operand 9 states. [2019-10-13 18:02:57,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:57,367 INFO L93 Difference]: Finished difference Result 1702 states and 2664 transitions. [2019-10-13 18:02:57,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 18:02:57,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 114 [2019-10-13 18:02:57,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:57,378 INFO L225 Difference]: With dead ends: 1702 [2019-10-13 18:02:57,379 INFO L226 Difference]: Without dead ends: 1148 [2019-10-13 18:02:57,381 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 [2019-10-13 18:02:57,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2019-10-13 18:02:57,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1124. [2019-10-13 18:02:57,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-13 18:02:57,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1609 transitions. [2019-10-13 18:02:57,433 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1609 transitions. Word has length 114 [2019-10-13 18:02:57,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:57,434 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1609 transitions. [2019-10-13 18:02:57,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:02:57,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1609 transitions. [2019-10-13 18:02:57,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-13 18:02:57,439 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:57,439 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:57,439 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:57,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:57,440 INFO L82 PathProgramCache]: Analyzing trace with hash -763732814, now seen corresponding path program 1 times [2019-10-13 18:02:57,440 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:57,440 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319843547] [2019-10-13 18:02:57,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:57,441 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:57,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:57,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:57,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:57,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:57,653 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:57,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319843547] [2019-10-13 18:02:57,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305764612] [2019-10-13 18:02:57,654 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:57,735 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:02:57,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:02:57,837 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:57,838 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:02:57,838 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 18:02:57,838 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291942390] [2019-10-13 18:02:57,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:02:57,839 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:02:57,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:57,840 INFO L87 Difference]: Start difference. First operand 1124 states and 1609 transitions. Second operand 3 states. [2019-10-13 18:02:58,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:02:58,760 INFO L93 Difference]: Finished difference Result 2242 states and 3218 transitions. [2019-10-13 18:02:58,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:02:58,760 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 147 [2019-10-13 18:02:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:02:58,767 INFO L225 Difference]: With dead ends: 2242 [2019-10-13 18:02:58,767 INFO L226 Difference]: Without dead ends: 1124 [2019-10-13 18:02:58,770 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-13 18:02:58,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1124 states. [2019-10-13 18:02:58,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1124 to 1124. [2019-10-13 18:02:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1124 states. [2019-10-13 18:02:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1124 states to 1124 states and 1477 transitions. [2019-10-13 18:02:58,813 INFO L78 Accepts]: Start accepts. Automaton has 1124 states and 1477 transitions. Word has length 147 [2019-10-13 18:02:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:02:58,813 INFO L462 AbstractCegarLoop]: Abstraction has 1124 states and 1477 transitions. [2019-10-13 18:02:58,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:02:58,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1124 states and 1477 transitions. [2019-10-13 18:02:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2019-10-13 18:02:58,822 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:02:58,822 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:02:59,026 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:02:59,026 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:02:59,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:02:59,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1919487047, now seen corresponding path program 1 times [2019-10-13 18:02:59,028 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:02:59,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665467174] [2019-10-13 18:02:59,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:59,028 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:02:59,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:02:59,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:02:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 18:02:59,275 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665467174] [2019-10-13 18:02:59,275 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 18:02:59,275 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-13 18:02:59,275 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496039617] [2019-10-13 18:02:59,276 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 18:02:59,276 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:02:59,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 18:02:59,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-13 18:02:59,277 INFO L87 Difference]: Start difference. First operand 1124 states and 1477 transitions. Second operand 8 states. [2019-10-13 18:03:01,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:01,177 INFO L93 Difference]: Finished difference Result 2850 states and 3834 transitions. [2019-10-13 18:03:01,178 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:01,178 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 152 [2019-10-13 18:03:01,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:01,189 INFO L225 Difference]: With dead ends: 2850 [2019-10-13 18:03:01,190 INFO L226 Difference]: Without dead ends: 1732 [2019-10-13 18:03:01,193 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:01,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2019-10-13 18:03:01,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1514. [2019-10-13 18:03:01,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1514 states. [2019-10-13 18:03:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1514 states to 1514 states and 1946 transitions. [2019-10-13 18:03:01,287 INFO L78 Accepts]: Start accepts. Automaton has 1514 states and 1946 transitions. Word has length 152 [2019-10-13 18:03:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:01,288 INFO L462 AbstractCegarLoop]: Abstraction has 1514 states and 1946 transitions. [2019-10-13 18:03:01,289 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 18:03:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1514 states and 1946 transitions. [2019-10-13 18:03:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2019-10-13 18:03:01,295 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:01,297 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2019-10-13 18:03:01,297 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:01,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1543266050, now seen corresponding path program 1 times [2019-10-13 18:03:01,298 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:01,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722929515] [2019-10-13 18:03:01,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:01,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 18:03:01,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722929515] [2019-10-13 18:03:01,697 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919756053] [2019-10-13 18:03:01,697 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 [2019-10-13 18:03:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:01,791 INFO L256 TraceCheckSpWp]: Trace formula consists of 409 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 18:03:01,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:01,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 107 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 18:03:01,982 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:01,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2019-10-13 18:03:01,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068537943] [2019-10-13 18:03:01,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 18:03:01,984 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:01,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 18:03:01,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-10-13 18:03:01,985 INFO L87 Difference]: Start difference. First operand 1514 states and 1946 transitions. Second operand 5 states. [2019-10-13 18:03:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:03,313 INFO L93 Difference]: Finished difference Result 3420 states and 4372 transitions. [2019-10-13 18:03:03,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 18:03:03,314 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 227 [2019-10-13 18:03:03,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:03,326 INFO L225 Difference]: With dead ends: 3420 [2019-10-13 18:03:03,327 INFO L226 Difference]: Without dead ends: 1912 [2019-10-13 18:03:03,332 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:03,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2019-10-13 18:03:03,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1890. [2019-10-13 18:03:03,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1890 states. [2019-10-13 18:03:03,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1890 states to 1890 states and 2348 transitions. [2019-10-13 18:03:03,393 INFO L78 Accepts]: Start accepts. Automaton has 1890 states and 2348 transitions. Word has length 227 [2019-10-13 18:03:03,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:03,395 INFO L462 AbstractCegarLoop]: Abstraction has 1890 states and 2348 transitions. [2019-10-13 18:03:03,395 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 18:03:03,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1890 states and 2348 transitions. [2019-10-13 18:03:03,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2019-10-13 18:03:03,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:03,402 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:03,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:03,608 INFO L410 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:03,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:03,609 INFO L82 PathProgramCache]: Analyzing trace with hash 320186650, now seen corresponding path program 1 times [2019-10-13 18:03:03,609 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:03,610 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132003299] [2019-10-13 18:03:03,610 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:03,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:03,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 94 proven. 227 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 18:03:04,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132003299] [2019-10-13 18:03:04,843 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931105227] [2019-10-13 18:03:04,843 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 [2019-10-13 18:03:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:04,945 INFO L256 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 26 conjunts are in the unsatisfiable core [2019-10-13 18:03:04,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:05,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:05,250 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 246 proven. 53 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2019-10-13 18:03:05,251 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:05,251 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2019-10-13 18:03:05,251 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462210993] [2019-10-13 18:03:05,252 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 18:03:05,252 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:05,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 18:03:05,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2019-10-13 18:03:05,253 INFO L87 Difference]: Start difference. First operand 1890 states and 2348 transitions. Second operand 16 states. [2019-10-13 18:03:09,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:09,434 INFO L93 Difference]: Finished difference Result 3724 states and 4688 transitions. [2019-10-13 18:03:09,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 18:03:09,434 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 311 [2019-10-13 18:03:09,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:09,444 INFO L225 Difference]: With dead ends: 3724 [2019-10-13 18:03:09,444 INFO L226 Difference]: Without dead ends: 1975 [2019-10-13 18:03:09,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 332 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 18:03:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2019-10-13 18:03:09,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1886. [2019-10-13 18:03:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1886 states. [2019-10-13 18:03:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1886 states to 1886 states and 2204 transitions. [2019-10-13 18:03:09,503 INFO L78 Accepts]: Start accepts. Automaton has 1886 states and 2204 transitions. Word has length 311 [2019-10-13 18:03:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:09,504 INFO L462 AbstractCegarLoop]: Abstraction has 1886 states and 2204 transitions. [2019-10-13 18:03:09,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 18:03:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1886 states and 2204 transitions. [2019-10-13 18:03:09,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2019-10-13 18:03:09,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:09,511 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, 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, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:09,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:09,719 INFO L410 AbstractCegarLoop]: === Iteration 7 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1604889922, now seen corresponding path program 1 times [2019-10-13 18:03:09,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:09,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090206883] [2019-10-13 18:03:09,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:09,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:09,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,150 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 81 proven. 3 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-13 18:03:10,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090206883] [2019-10-13 18:03:10,151 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273787799] [2019-10-13 18:03:10,151 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 [2019-10-13 18:03:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:10,282 INFO L256 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 18:03:10,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:10,395 INFO L134 CoverageAnalysis]: Checked inductivity of 412 backedges. 90 proven. 0 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2019-10-13 18:03:10,397 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 18:03:10,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 18:03:10,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779852957] [2019-10-13 18:03:10,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 18:03:10,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:10,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 18:03:10,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:10,400 INFO L87 Difference]: Start difference. First operand 1886 states and 2204 transitions. Second operand 3 states. [2019-10-13 18:03:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:11,047 INFO L93 Difference]: Finished difference Result 2620 states and 3088 transitions. [2019-10-13 18:03:11,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 18:03:11,048 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 371 [2019-10-13 18:03:11,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:11,061 INFO L225 Difference]: With dead ends: 2620 [2019-10-13 18:03:11,061 INFO L226 Difference]: Without dead ends: 2618 [2019-10-13 18:03:11,063 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 18:03:11,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2019-10-13 18:03:11,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2068. [2019-10-13 18:03:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2068 states. [2019-10-13 18:03:11,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2068 states to 2068 states and 2437 transitions. [2019-10-13 18:03:11,151 INFO L78 Accepts]: Start accepts. Automaton has 2068 states and 2437 transitions. Word has length 371 [2019-10-13 18:03:11,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:11,152 INFO L462 AbstractCegarLoop]: Abstraction has 2068 states and 2437 transitions. [2019-10-13 18:03:11,152 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 18:03:11,152 INFO L276 IsEmpty]: Start isEmpty. Operand 2068 states and 2437 transitions. [2019-10-13 18:03:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2019-10-13 18:03:11,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:11,162 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:11,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:11,374 INFO L410 AbstractCegarLoop]: === Iteration 8 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:11,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:11,375 INFO L82 PathProgramCache]: Analyzing trace with hash -175734051, now seen corresponding path program 1 times [2019-10-13 18:03:11,375 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:11,375 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082031599] [2019-10-13 18:03:11,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:11,375 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:11,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,022 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 338 proven. 79 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-10-13 18:03:12,022 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082031599] [2019-10-13 18:03:12,023 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867409942] [2019-10-13 18:03:12,023 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 [2019-10-13 18:03:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:12,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 703 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:12,152 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:12,288 INFO L134 CoverageAnalysis]: Checked inductivity of 680 backedges. 543 proven. 2 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-10-13 18:03:12,289 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:12,289 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 9 [2019-10-13 18:03:12,289 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131011445] [2019-10-13 18:03:12,290 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 18:03:12,291 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:12,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 18:03:12,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2019-10-13 18:03:12,291 INFO L87 Difference]: Start difference. First operand 2068 states and 2437 transitions. Second operand 9 states. [2019-10-13 18:03:14,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:14,456 INFO L93 Difference]: Finished difference Result 4872 states and 5827 transitions. [2019-10-13 18:03:14,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 18:03:14,456 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 446 [2019-10-13 18:03:14,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:14,470 INFO L225 Difference]: With dead ends: 4872 [2019-10-13 18:03:14,470 INFO L226 Difference]: Without dead ends: 2992 [2019-10-13 18:03:14,475 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 459 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-13 18:03:14,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2992 states. [2019-10-13 18:03:14,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2992 to 2810. [2019-10-13 18:03:14,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2019-10-13 18:03:14,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3243 transitions. [2019-10-13 18:03:14,536 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3243 transitions. Word has length 446 [2019-10-13 18:03:14,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:14,537 INFO L462 AbstractCegarLoop]: Abstraction has 2810 states and 3243 transitions. [2019-10-13 18:03:14,537 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 18:03:14,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3243 transitions. [2019-10-13 18:03:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2019-10-13 18:03:14,551 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:14,552 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:14,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:14,756 INFO L410 AbstractCegarLoop]: === Iteration 9 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:14,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:14,756 INFO L82 PathProgramCache]: Analyzing trace with hash -572917387, now seen corresponding path program 1 times [2019-10-13 18:03:14,759 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:14,766 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495381201] [2019-10-13 18:03:14,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:14,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:14,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 458 proven. 87 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-10-13 18:03:16,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495381201] [2019-10-13 18:03:16,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959686602] [2019-10-13 18:03:16,541 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 [2019-10-13 18:03:16,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:16,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 18:03:16,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:16,724 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-10-13 18:03:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 1040 backedges. 738 proven. 2 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2019-10-13 18:03:17,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:17,142 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5] total 12 [2019-10-13 18:03:17,142 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642041288] [2019-10-13 18:03:17,144 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 18:03:17,144 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:17,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 18:03:17,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2019-10-13 18:03:17,145 INFO L87 Difference]: Start difference. First operand 2810 states and 3243 transitions. Second operand 12 states. [2019-10-13 18:03:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 18:03:19,291 INFO L93 Difference]: Finished difference Result 5722 states and 6647 transitions. [2019-10-13 18:03:19,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 18:03:19,292 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 530 [2019-10-13 18:03:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 18:03:19,305 INFO L225 Difference]: With dead ends: 5722 [2019-10-13 18:03:19,305 INFO L226 Difference]: Without dead ends: 3063 [2019-10-13 18:03:19,311 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 549 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-10-13 18:03:19,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3063 states. [2019-10-13 18:03:19,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3063 to 2810. [2019-10-13 18:03:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2810 states. [2019-10-13 18:03:19,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2810 states to 2810 states and 3153 transitions. [2019-10-13 18:03:19,372 INFO L78 Accepts]: Start accepts. Automaton has 2810 states and 3153 transitions. Word has length 530 [2019-10-13 18:03:19,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 18:03:19,373 INFO L462 AbstractCegarLoop]: Abstraction has 2810 states and 3153 transitions. [2019-10-13 18:03:19,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 18:03:19,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2810 states and 3153 transitions. [2019-10-13 18:03:19,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 557 [2019-10-13 18:03:19,381 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 18:03:19,381 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, 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, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 18:03:19,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 18:03:19,594 INFO L410 AbstractCegarLoop]: === Iteration 10 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 18:03:19,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 18:03:19,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1597953097, now seen corresponding path program 2 times [2019-10-13 18:03:19,595 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 18:03:19,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554292980] [2019-10-13 18:03:19,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 18:03:19,595 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 18:03:19,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 18:03:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 681 proven. 174 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2019-10-13 18:03:20,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554292980] [2019-10-13 18:03:20,705 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007752712] [2019-10-13 18:03:20,705 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 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 [2019-10-13 18:03:20,869 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 18:03:20,870 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 18:03:20,873 INFO L256 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 18:03:20,882 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 18:03:20,923 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 18:03:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1117 backedges. 764 proven. 2 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2019-10-13 18:03:21,200 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 18:03:21,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5] total 17 [2019-10-13 18:03:21,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887177932] [2019-10-13 18:03:21,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 18:03:21,201 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 18:03:21,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 18:03:21,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-10-13 18:03:21,202 INFO L87 Difference]: Start difference. First operand 2810 states and 3153 transitions. Second operand 17 states.