./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30f4e4ab Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-30f4e4a [2019-11-28 00:25:44,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 00:25:44,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 00:25:44,940 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 00:25:44,941 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 00:25:44,942 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 00:25:44,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 00:25:44,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 00:25:44,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 00:25:44,948 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 00:25:44,949 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 00:25:44,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 00:25:44,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 00:25:44,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 00:25:44,953 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 00:25:44,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 00:25:44,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 00:25:44,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 00:25:44,958 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 00:25:44,960 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 00:25:44,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 00:25:44,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 00:25:44,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 00:25:44,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 00:25:44,967 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 00:25:44,967 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 00:25:44,968 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 00:25:44,969 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 00:25:44,969 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 00:25:44,970 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 00:25:44,970 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 00:25:44,971 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 00:25:44,972 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 00:25:44,973 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 00:25:44,974 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 00:25:44,974 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 00:25:44,975 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 00:25:44,975 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 00:25:44,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 00:25:44,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 00:25:44,977 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 00:25:44,978 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 00:25:44,995 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 00:25:44,996 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 00:25:44,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 00:25:44,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 00:25:44,998 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 00:25:44,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 00:25:44,998 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 00:25:44,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 00:25:44,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 00:25:44,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 00:25:44,999 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 00:25:45,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 00:25:45,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 00:25:45,000 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 00:25:45,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 00:25:45,001 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 00:25:45,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 00:25:45,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 00:25:45,002 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 00:25:45,002 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 00:25:45,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 00:25:45,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 00:25:45,003 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 00:25:45,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 00:25:45,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 00:25:45,004 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 00:25:45,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 00:25:45,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 00:25:45,004 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d7026bf672987d88e3a6ea48c2c5a690fd9a5f2 [2019-11-28 00:25:45,295 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 00:25:45,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 00:25:45,314 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 00:25:45,316 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 00:25:45,316 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 00:25:45,317 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2019-11-28 00:25:45,387 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76cf7a65f/ca25a9f84f414648a96aadb2e71f10d4/FLAG9b54c27ae [2019-11-28 00:25:45,803 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 00:25:45,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2019-11-28 00:25:45,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76cf7a65f/ca25a9f84f414648a96aadb2e71f10d4/FLAG9b54c27ae [2019-11-28 00:25:46,244 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/76cf7a65f/ca25a9f84f414648a96aadb2e71f10d4 [2019-11-28 00:25:46,247 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 00:25:46,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 00:25:46,249 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:46,250 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 00:25:46,253 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 00:25:46,254 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18bf781c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46, skipping insertion in model container [2019-11-28 00:25:46,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 00:25:46,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 00:25:46,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:46,504 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 00:25:46,518 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 00:25:46,529 INFO L208 MainTranslator]: Completed translation [2019-11-28 00:25:46,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46 WrapperNode [2019-11-28 00:25:46,530 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 00:25:46,530 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:46,530 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 00:25:46,531 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 00:25:46,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,543 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,559 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 00:25:46,559 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 00:25:46,617 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 00:25:46,617 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 00:25:46,626 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,629 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,631 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (1/1) ... [2019-11-28 00:25:46,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 00:25:46,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 00:25:46,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 00:25:46,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 00:25:46,633 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (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 [2019-11-28 00:25:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 00:25:46,681 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 00:25:46,681 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 00:25:46,682 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 00:25:46,831 INFO L292 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 00:25:46,832 INFO L297 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 00:25:46,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46 BoogieIcfgContainer [2019-11-28 00:25:46,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 00:25:46,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 00:25:46,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 00:25:46,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 00:25:46,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 12:25:46" (1/3) ... [2019-11-28 00:25:46,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c2692e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:46, skipping insertion in model container [2019-11-28 00:25:46,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 12:25:46" (2/3) ... [2019-11-28 00:25:46,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43c2692e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 12:25:46, skipping insertion in model container [2019-11-28 00:25:46,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46" (3/3) ... [2019-11-28 00:25:46,841 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2019-11-28 00:25:46,851 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 00:25:46,857 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 00:25:46,867 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 00:25:46,888 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 00:25:46,889 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 00:25:46,889 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 00:25:46,889 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 00:25:46,890 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 00:25:46,890 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 00:25:46,890 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 00:25:46,890 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 00:25:46,908 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 00:25:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 00:25:46,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:46,914 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:46,915 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:46,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 00:25:46,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:46,928 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007028466] [2019-11-28 00:25:46,928 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:46,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-28 00:25:47,109 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007028466] [2019-11-28 00:25:47,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 00:25:47,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 00:25:47,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977540082] [2019-11-28 00:25:47,117 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 00:25:47,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:47,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 00:25:47,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 00:25:47,136 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 00:25:47,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,225 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 00:25:47,226 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 00:25:47,227 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 00:25:47,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,237 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:47,237 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 00:25:47,241 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-28 00:25:47,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 00:25:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 00:25:47,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 00:25:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 00:25:47,283 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 00:25:47,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,283 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 00:25:47,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 00:25:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 00:25:47,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 00:25:47,285 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,286 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:47,286 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:47,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:47,287 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 00:25:47,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:47,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973636471] [2019-11-28 00:25:47,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:47,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:47,407 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973636471] [2019-11-28 00:25:47,408 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454217717] [2019-11-28 00:25:47,408 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 [2019-11-28 00:25:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,458 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 00:25:47,466 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:47,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-28 00:25:47,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:47,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 00:25:47,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653742649] [2019-11-28 00:25:47,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 00:25:47,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:47,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 00:25:47,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 00:25:47,533 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 00:25:47,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:47,630 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 00:25:47,632 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 00:25:47,632 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 00:25:47,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:47,633 INFO L225 Difference]: With dead ends: 21 [2019-11-28 00:25:47,634 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 00:25:47,637 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:47,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 00:25:47,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 00:25:47,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 00:25:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 00:25:47,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 00:25:47,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:47,648 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 00:25:47,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 00:25:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 00:25:47,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 00:25:47,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:47,651 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:47,856 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:47,857 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:47,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 00:25:47,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:47,860 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703638604] [2019-11-28 00:25:47,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,064 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:48,064 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703638604] [2019-11-28 00:25:48,065 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704386237] [2019-11-28 00:25:48,065 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 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 [2019-11-28 00:25:48,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:48,105 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:48,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 00:25:48,108 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:48,155 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-28 00:25:48,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:48,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 00:25:48,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258218607] [2019-11-28 00:25:48,157 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 00:25:48,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:48,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 00:25:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 00:25:48,158 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-28 00:25:48,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:48,246 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 00:25:48,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 00:25:48,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 00:25:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:48,248 INFO L225 Difference]: With dead ends: 24 [2019-11-28 00:25:48,249 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 00:25:48,249 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:48,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 00:25:48,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 00:25:48,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 00:25:48,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 00:25:48,255 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 00:25:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:48,256 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 00:25:48,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 00:25:48,256 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 00:25:48,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 00:25:48,257 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:48,257 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:48,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:48,462 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:48,463 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 00:25:48,464 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:48,465 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145591174] [2019-11-28 00:25:48,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:48,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145591174] [2019-11-28 00:25:48,662 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508311220] [2019-11-28 00:25:48,662 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-28 00:25:48,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 00:25:48,706 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:48,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 00:25:48,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:48,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-28 00:25:48,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:48,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-28 00:25:48,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300931472] [2019-11-28 00:25:48,761 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 00:25:48,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:48,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 00:25:48,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 00:25:48,762 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-28 00:25:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:48,858 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 00:25:48,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 00:25:48,860 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-28 00:25:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:48,862 INFO L225 Difference]: With dead ends: 27 [2019-11-28 00:25:48,862 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 00:25:48,863 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 00:25:48,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 00:25:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 00:25:48,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 00:25:48,881 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 00:25:48,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:48,883 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 00:25:48,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 00:25:48,883 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 00:25:48,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 00:25:48,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:48,886 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:49,091 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,092 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 00:25:49,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,093 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407411843] [2019-11-28 00:25:49,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,252 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:49,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407411843] [2019-11-28 00:25:49,253 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299861411] [2019-11-28 00:25:49,253 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2019-11-28 00:25:49,298 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:49,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:49,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 00:25:49,302 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:49,341 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-11-28 00:25:49,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:49,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-28 00:25:49,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693604630] [2019-11-28 00:25:49,344 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 00:25:49,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:49,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 00:25:49,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 00:25:49,345 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-28 00:25:49,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:49,450 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 00:25:49,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 00:25:49,450 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-28 00:25:49,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:49,451 INFO L225 Difference]: With dead ends: 30 [2019-11-28 00:25:49,452 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 00:25:49,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 00:25:49,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 00:25:49,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 00:25:49,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 00:25:49,458 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 00:25:49,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:49,459 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 00:25:49,459 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 00:25:49,459 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 00:25:49,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 00:25:49,460 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:49,461 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:49,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:49,665 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:49,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:49,666 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 00:25:49,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:49,667 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577813881] [2019-11-28 00:25:49,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:49,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577813881] [2019-11-28 00:25:49,908 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132326054] [2019-11-28 00:25:49,908 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2019-11-28 00:25:49,939 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 00:25:49,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:49,942 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 00:25:49,945 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:49,995 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-11-28 00:25:49,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:49,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-11-28 00:25:49,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756542836] [2019-11-28 00:25:49,997 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 00:25:49,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:49,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 00:25:49,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 00:25:49,998 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-11-28 00:25:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,082 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 00:25:50,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 00:25:50,083 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-28 00:25:50,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,084 INFO L225 Difference]: With dead ends: 33 [2019-11-28 00:25:50,084 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 00:25:50,085 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 00:25:50,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 00:25:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 00:25:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 00:25:50,092 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 00:25:50,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,092 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 00:25:50,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 00:25:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 00:25:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 00:25:50,094 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,094 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,300 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 00:25:50,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,301 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110527840] [2019-11-28 00:25:50,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:50,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110527840] [2019-11-28 00:25:50,504 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038935111] [2019-11-28 00:25:50,505 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2019-11-28 00:25:50,539 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 00:25:50,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:50,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 00:25:50,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:50,599 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-28 00:25:50,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:50,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-28 00:25:50,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159533019] [2019-11-28 00:25:50,601 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 00:25:50,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:50,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 00:25:50,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 00:25:50,603 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-11-28 00:25:50,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:50,724 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 00:25:50,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 00:25:50,725 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-28 00:25:50,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:50,727 INFO L225 Difference]: With dead ends: 36 [2019-11-28 00:25:50,727 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 00:25:50,728 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 00:25:50,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 00:25:50,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 00:25:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 00:25:50,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 00:25:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:50,740 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 00:25:50,740 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 00:25:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 00:25:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 00:25:50,741 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:50,741 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:50,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:50,947 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 00:25:50,949 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:50,949 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155031570] [2019-11-28 00:25:50,950 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,250 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 00:25:51,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155031570] [2019-11-28 00:25:51,251 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169888554] [2019-11-28 00:25:51,252 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2019-11-28 00:25:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 00:25:51,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:51,362 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-11-28 00:25:51,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:51,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-11-28 00:25:51,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100920119] [2019-11-28 00:25:51,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 00:25:51,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:51,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 00:25:51,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 00:25:51,369 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-28 00:25:51,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:51,500 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 00:25:51,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 00:25:51,501 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-28 00:25:51,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:51,502 INFO L225 Difference]: With dead ends: 39 [2019-11-28 00:25:51,503 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 00:25:51,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-11-28 00:25:51,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 00:25:51,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 00:25:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 00:25:51,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 00:25:51,510 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 00:25:51,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:51,510 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 00:25:51,510 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 00:25:51,511 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 00:25:51,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 00:25:51,512 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:51,512 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:51,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:51,722 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:51,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:51,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 00:25:51,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:51,723 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387619341] [2019-11-28 00:25:51,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 00:25:51,960 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387619341] [2019-11-28 00:25:51,961 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982859303] [2019-11-28 00:25:51,962 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 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 [2019-11-28 00:25:52,008 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:52,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:52,010 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 00:25:52,026 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,087 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-11-28 00:25:52,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 00:25:52,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412360167] [2019-11-28 00:25:52,091 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 00:25:52,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 00:25:52,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 00:25:52,093 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-11-28 00:25:52,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,220 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 00:25:52,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 00:25:52,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-28 00:25:52,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,221 INFO L225 Difference]: With dead ends: 42 [2019-11-28 00:25:52,221 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 00:25:52,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:25:52,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 00:25:52,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 00:25:52,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 00:25:52,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 00:25:52,228 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 00:25:52,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,228 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 00:25:52,228 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 00:25:52,228 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 00:25:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 00:25:52,230 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,230 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:52,438 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:52,438 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:52,439 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 00:25:52,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:52,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595429406] [2019-11-28 00:25:52,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:52,683 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 00:25:52,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595429406] [2019-11-28 00:25:52,684 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901375683] [2019-11-28 00:25:52,684 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-28 00:25:52,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 00:25:52,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:52,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 00:25:52,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:52,798 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2019-11-28 00:25:52,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:52,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-28 00:25:52,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302697982] [2019-11-28 00:25:52,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 00:25:52,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:52,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 00:25:52,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 00:25:52,803 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-11-28 00:25:52,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:52,942 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 00:25:52,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 00:25:52,944 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-28 00:25:52,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:52,947 INFO L225 Difference]: With dead ends: 45 [2019-11-28 00:25:52,947 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 00:25:52,948 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2019-11-28 00:25:52,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 00:25:52,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 00:25:52,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 00:25:52,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 00:25:52,958 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 00:25:52,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:52,958 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 00:25:52,958 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 00:25:52,958 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 00:25:52,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 00:25:52,959 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:52,962 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:53,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:53,166 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:53,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:53,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 00:25:53,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:53,168 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511245698] [2019-11-28 00:25:53,168 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:53,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 00:25:53,516 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511245698] [2019-11-28 00:25:53,517 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310451287] [2019-11-28 00:25:53,517 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:53,577 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:53,578 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:53,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-28 00:25:53,592 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:53,686 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-11-28 00:25:53,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:53,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2019-11-28 00:25:53,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785609317] [2019-11-28 00:25:53,688 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-28 00:25:53,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:53,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-28 00:25:53,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2019-11-28 00:25:53,689 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 17 states. [2019-11-28 00:25:53,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:53,848 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-28 00:25:53,849 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-28 00:25:53,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2019-11-28 00:25:53,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:53,850 INFO L225 Difference]: With dead ends: 48 [2019-11-28 00:25:53,852 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 00:25:53,853 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2019-11-28 00:25:53,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 00:25:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 00:25:53,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 00:25:53,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 00:25:53,865 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-28 00:25:53,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:53,866 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 00:25:53,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-28 00:25:53,867 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 00:25:53,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-28 00:25:53,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:53,872 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:54,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,077 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:54,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-28 00:25:54,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:54,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508633502] [2019-11-28 00:25:54,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 00:25:54,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508633502] [2019-11-28 00:25:54,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705260773] [2019-11-28 00:25:54,446 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,513 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 00:25:54,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:54,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 00:25:54,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 00:25:54,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:54,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2019-11-28 00:25:54,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517382227] [2019-11-28 00:25:54,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-28 00:25:54,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:54,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-28 00:25:54,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2019-11-28 00:25:54,596 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 18 states. [2019-11-28 00:25:54,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:54,759 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2019-11-28 00:25:54,760 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 00:25:54,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 75 [2019-11-28 00:25:54,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:54,761 INFO L225 Difference]: With dead ends: 51 [2019-11-28 00:25:54,761 INFO L226 Difference]: Without dead ends: 47 [2019-11-28 00:25:54,762 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2019-11-28 00:25:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-28 00:25:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-28 00:25:54,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-28 00:25:54,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2019-11-28 00:25:54,769 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2019-11-28 00:25:54,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:54,769 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2019-11-28 00:25:54,769 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-28 00:25:54,769 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2019-11-28 00:25:54,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-28 00:25:54,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:54,771 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:54,974 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:54,975 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:54,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:54,975 INFO L82 PathProgramCache]: Analyzing trace with hash -461124311, now seen corresponding path program 12 times [2019-11-28 00:25:54,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:54,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553880420] [2019-11-28 00:25:54,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,324 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 00:25:55,324 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553880420] [2019-11-28 00:25:55,325 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561501101] [2019-11-28 00:25:55,325 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:55,374 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-28 00:25:55,375 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:55,376 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-28 00:25:55,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2019-11-28 00:25:55,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:55,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2019-11-28 00:25:55,428 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117632030] [2019-11-28 00:25:55,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-28 00:25:55,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:55,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-28 00:25:55,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2019-11-28 00:25:55,430 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 19 states. [2019-11-28 00:25:55,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:55,601 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2019-11-28 00:25:55,601 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-28 00:25:55,601 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 81 [2019-11-28 00:25:55,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:55,602 INFO L225 Difference]: With dead ends: 54 [2019-11-28 00:25:55,602 INFO L226 Difference]: Without dead ends: 50 [2019-11-28 00:25:55,603 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2019-11-28 00:25:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-28 00:25:55,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-11-28 00:25:55,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-11-28 00:25:55,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2019-11-28 00:25:55,617 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2019-11-28 00:25:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:55,618 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2019-11-28 00:25:55,618 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-28 00:25:55,618 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2019-11-28 00:25:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-28 00:25:55,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:55,620 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:55,823 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:55,824 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:55,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1887065709, now seen corresponding path program 13 times [2019-11-28 00:25:55,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:55,825 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930577969] [2019-11-28 00:25:55,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:55,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:55,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 00:25:56,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930577969] [2019-11-28 00:25:56,400 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128470318] [2019-11-28 00:25:56,400 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-28 00:25:56,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:56,513 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-11-28 00:25:56,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:56,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2019-11-28 00:25:56,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852741334] [2019-11-28 00:25:56,516 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-28 00:25:56,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:56,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-28 00:25:56,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2019-11-28 00:25:56,517 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 20 states. [2019-11-28 00:25:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:56,700 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2019-11-28 00:25:56,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-28 00:25:56,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 87 [2019-11-28 00:25:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:56,703 INFO L225 Difference]: With dead ends: 57 [2019-11-28 00:25:56,703 INFO L226 Difference]: Without dead ends: 53 [2019-11-28 00:25:56,704 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2019-11-28 00:25:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-28 00:25:56,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-28 00:25:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-28 00:25:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2019-11-28 00:25:56,710 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2019-11-28 00:25:56,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:56,711 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2019-11-28 00:25:56,711 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-28 00:25:56,711 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2019-11-28 00:25:56,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2019-11-28 00:25:56,712 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:56,713 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:56,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:56,916 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:56,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1777212503, now seen corresponding path program 14 times [2019-11-28 00:25:56,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:56,917 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027361923] [2019-11-28 00:25:56,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:56,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:56,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,358 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 00:25:57,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027361923] [2019-11-28 00:25:57,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369540282] [2019-11-28 00:25:57,359 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:57,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:25:57,410 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:57,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-28 00:25:57,413 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:57,485 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2019-11-28 00:25:57,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:57,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2019-11-28 00:25:57,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998338835] [2019-11-28 00:25:57,488 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-28 00:25:57,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:57,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-28 00:25:57,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2019-11-28 00:25:57,490 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2019-11-28 00:25:57,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:57,700 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2019-11-28 00:25:57,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-28 00:25:57,700 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 93 [2019-11-28 00:25:57,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:57,701 INFO L225 Difference]: With dead ends: 60 [2019-11-28 00:25:57,701 INFO L226 Difference]: Without dead ends: 56 [2019-11-28 00:25:57,702 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2019-11-28 00:25:57,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2019-11-28 00:25:57,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2019-11-28 00:25:57,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-28 00:25:57,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2019-11-28 00:25:57,716 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2019-11-28 00:25:57,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:57,717 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2019-11-28 00:25:57,717 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-28 00:25:57,717 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2019-11-28 00:25:57,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2019-11-28 00:25:57,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:57,719 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:57,923 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:57,923 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:57,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:57,924 INFO L82 PathProgramCache]: Analyzing trace with hash -948911981, now seen corresponding path program 15 times [2019-11-28 00:25:57,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:57,924 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974025309] [2019-11-28 00:25:57,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-28 00:25:58,528 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974025309] [2019-11-28 00:25:58,529 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430949307] [2019-11-28 00:25:58,529 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:58,598 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-28 00:25:58,599 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:58,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-28 00:25:58,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:58,671 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2019-11-28 00:25:58,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:58,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2019-11-28 00:25:58,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042085562] [2019-11-28 00:25:58,673 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-28 00:25:58,673 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:58,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-28 00:25:58,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2019-11-28 00:25:58,674 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 22 states. [2019-11-28 00:25:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:58,884 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2019-11-28 00:25:58,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-28 00:25:58,885 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 99 [2019-11-28 00:25:58,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:58,886 INFO L225 Difference]: With dead ends: 63 [2019-11-28 00:25:58,886 INFO L226 Difference]: Without dead ends: 59 [2019-11-28 00:25:58,887 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2019-11-28 00:25:58,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-28 00:25:58,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-28 00:25:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-28 00:25:58,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2019-11-28 00:25:58,892 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2019-11-28 00:25:58,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:25:58,892 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2019-11-28 00:25:58,892 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-28 00:25:58,892 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2019-11-28 00:25:58,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-28 00:25:58,893 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:25:58,894 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:25:59,098 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:59,098 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:25:59,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:25:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash 1159072297, now seen corresponding path program 16 times [2019-11-28 00:25:59,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:25:59,100 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400856925] [2019-11-28 00:25:59,100 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:25:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:25:59,656 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-28 00:25:59,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400856925] [2019-11-28 00:25:59,657 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139036161] [2019-11-28 00:25:59,657 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:25:59,712 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 00:25:59,713 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:25:59,714 INFO L255 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-28 00:25:59,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:25:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-11-28 00:25:59,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:25:59,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2019-11-28 00:25:59,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266431273] [2019-11-28 00:25:59,778 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-28 00:25:59,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:25:59,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-28 00:25:59,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2019-11-28 00:25:59,779 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 23 states. [2019-11-28 00:25:59,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:25:59,996 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2019-11-28 00:25:59,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-28 00:25:59,996 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 105 [2019-11-28 00:25:59,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:25:59,997 INFO L225 Difference]: With dead ends: 66 [2019-11-28 00:25:59,997 INFO L226 Difference]: Without dead ends: 62 [2019-11-28 00:25:59,999 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2019-11-28 00:26:00,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-28 00:26:00,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2019-11-28 00:26:00,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-28 00:26:00,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-28 00:26:00,011 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2019-11-28 00:26:00,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:00,011 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-28 00:26:00,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-28 00:26:00,012 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-28 00:26:00,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-11-28 00:26:00,013 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:00,013 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:00,213 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:00,214 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2109441939, now seen corresponding path program 17 times [2019-11-28 00:26:00,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:00,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248192387] [2019-11-28 00:26:00,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:00,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:00,796 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-28 00:26:00,796 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248192387] [2019-11-28 00:26:00,797 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894312819] [2019-11-28 00:26:00,797 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:00,865 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-28 00:26:00,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:26:00,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 38 conjunts are in the unsatisfiable core [2019-11-28 00:26:00,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:00,953 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2019-11-28 00:26:00,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:00,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2019-11-28 00:26:00,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179466459] [2019-11-28 00:26:00,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-28 00:26:00,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:00,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-28 00:26:00,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2019-11-28 00:26:00,957 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 24 states. [2019-11-28 00:26:01,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:01,215 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2019-11-28 00:26:01,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-28 00:26:01,216 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2019-11-28 00:26:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:01,217 INFO L225 Difference]: With dead ends: 69 [2019-11-28 00:26:01,217 INFO L226 Difference]: Without dead ends: 65 [2019-11-28 00:26:01,218 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2019-11-28 00:26:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-28 00:26:01,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-28 00:26:01,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-28 00:26:01,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2019-11-28 00:26:01,223 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2019-11-28 00:26:01,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:01,224 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2019-11-28 00:26:01,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-28 00:26:01,224 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2019-11-28 00:26:01,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-28 00:26:01,225 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:01,226 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:01,426 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:01,427 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:01,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 450642089, now seen corresponding path program 18 times [2019-11-28 00:26:01,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:01,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451553687] [2019-11-28 00:26:01,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:01,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-28 00:26:02,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451553687] [2019-11-28 00:26:02,052 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045392231] [2019-11-28 00:26:02,052 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:02,138 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-28 00:26:02,138 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:26:02,140 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 40 conjunts are in the unsatisfiable core [2019-11-28 00:26:02,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:02,212 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2019-11-28 00:26:02,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:02,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2019-11-28 00:26:02,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642257646] [2019-11-28 00:26:02,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-28 00:26:02,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:02,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 00:26:02,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2019-11-28 00:26:02,216 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand 25 states. [2019-11-28 00:26:02,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:02,469 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2019-11-28 00:26:02,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-28 00:26:02,470 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 117 [2019-11-28 00:26:02,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:02,471 INFO L225 Difference]: With dead ends: 72 [2019-11-28 00:26:02,471 INFO L226 Difference]: Without dead ends: 68 [2019-11-28 00:26:02,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2019-11-28 00:26:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-11-28 00:26:02,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2019-11-28 00:26:02,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-11-28 00:26:02,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2019-11-28 00:26:02,480 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2019-11-28 00:26:02,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:02,480 INFO L462 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2019-11-28 00:26:02,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-28 00:26:02,480 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2019-11-28 00:26:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-11-28 00:26:02,482 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:02,482 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:02,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:02,687 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:02,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1141244269, now seen corresponding path program 19 times [2019-11-28 00:26:02,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:02,688 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994886668] [2019-11-28 00:26:02,688 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-28 00:26:03,377 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994886668] [2019-11-28 00:26:03,378 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281900193] [2019-11-28 00:26:03,378 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:03,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-28 00:26:03,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2019-11-28 00:26:03,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:03,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2019-11-28 00:26:03,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770128061] [2019-11-28 00:26:03,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-28 00:26:03,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:03,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-28 00:26:03,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2019-11-28 00:26:03,510 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 26 states. [2019-11-28 00:26:03,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:03,769 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2019-11-28 00:26:03,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-28 00:26:03,770 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 123 [2019-11-28 00:26:03,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:03,770 INFO L225 Difference]: With dead ends: 75 [2019-11-28 00:26:03,771 INFO L226 Difference]: Without dead ends: 71 [2019-11-28 00:26:03,772 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2019-11-28 00:26:03,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-28 00:26:03,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-28 00:26:03,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-28 00:26:03,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2019-11-28 00:26:03,775 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2019-11-28 00:26:03,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:03,776 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2019-11-28 00:26:03,776 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-28 00:26:03,776 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2019-11-28 00:26:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-28 00:26:03,777 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:03,777 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:03,982 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:03,982 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:03,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:03,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1280276695, now seen corresponding path program 20 times [2019-11-28 00:26:03,983 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:03,984 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60505483] [2019-11-28 00:26:03,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:05,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-28 00:26:05,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60505483] [2019-11-28 00:26:05,753 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301182245] [2019-11-28 00:26:05,754 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:05,803 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 00:26:05,804 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:26:05,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-28 00:26:05,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:05,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2019-11-28 00:26:05,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 00:26:05,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2019-11-28 00:26:05,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824340748] [2019-11-28 00:26:05,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-28 00:26:05,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:05,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-28 00:26:05,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-28 00:26:05,896 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand 45 states. [2019-11-28 00:26:06,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:06,753 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2019-11-28 00:26:06,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-28 00:26:06,754 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 129 [2019-11-28 00:26:06,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:06,755 INFO L225 Difference]: With dead ends: 78 [2019-11-28 00:26:06,755 INFO L226 Difference]: Without dead ends: 74 [2019-11-28 00:26:06,756 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 170 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2019-11-28 00:26:06,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-28 00:26:06,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2019-11-28 00:26:06,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-28 00:26:06,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2019-11-28 00:26:06,761 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2019-11-28 00:26:06,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:06,762 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2019-11-28 00:26:06,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-28 00:26:06,762 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2019-11-28 00:26:06,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2019-11-28 00:26:06,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 00:26:06,764 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 00:26:06,967 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:06,968 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 00:26:06,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 00:26:06,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1463802477, now seen corresponding path program 21 times [2019-11-28 00:26:06,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 00:26:06,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613362977] [2019-11-28 00:26:06,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 00:26:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 00:26:07,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-28 00:26:07,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613362977] [2019-11-28 00:26:07,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699305529] [2019-11-28 00:26:07,931 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:08,024 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-28 00:26:08,024 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 00:26:08,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-28 00:26:08,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 00:26:08,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2019-11-28 00:26:08,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 00:26:08,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 28 [2019-11-28 00:26:08,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464718371] [2019-11-28 00:26:08,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-28 00:26:08,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 00:26:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-28 00:26:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=470, Unknown=0, NotChecked=0, Total=756 [2019-11-28 00:26:08,107 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand 26 states. [2019-11-28 00:26:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 00:26:08,573 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2019-11-28 00:26:08,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-28 00:26:08,574 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 135 [2019-11-28 00:26:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 00:26:08,575 INFO L225 Difference]: With dead ends: 74 [2019-11-28 00:26:08,575 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 00:26:08,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=836, Invalid=1614, Unknown=0, NotChecked=0, Total=2450 [2019-11-28 00:26:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 00:26:08,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 00:26:08,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 00:26:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 00:26:08,577 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2019-11-28 00:26:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 00:26:08,578 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 00:26:08,578 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-28 00:26:08,578 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 00:26:08,578 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 00:26:08,784 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 00:26:08,787 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 00:26:08,811 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 20)) [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-28 00:26:08,812 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 00:26:08,812 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-28 00:26:08,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 12:26:08 BoogieIcfgContainer [2019-11-28 00:26:08,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 00:26:08,822 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 00:26:08,822 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 00:26:08,822 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 00:26:08,824 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 12:25:46" (3/4) ... [2019-11-28 00:26:08,830 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 00:26:08,839 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 00:26:08,845 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 00:26:08,846 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 00:26:08,886 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 00:26:08,886 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 00:26:08,888 INFO L168 Benchmark]: Toolchain (without parser) took 22639.24 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 557.3 MB). Free memory was 961.7 MB in the beginning and 1.1 GB in the end (delta: -96.6 MB). Peak memory consumption was 460.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:08,889 INFO L168 Benchmark]: CDTParser took 0.59 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:26:08,889 INFO L168 Benchmark]: CACSL2BoogieTranslator took 280.46 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:08,890 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.97 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:26:08,890 INFO L168 Benchmark]: Boogie Preprocessor took 72.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -183.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:08,890 INFO L168 Benchmark]: RCFGBuilder took 200.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:08,891 INFO L168 Benchmark]: TraceAbstraction took 21987.17 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 417.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 57.6 MB). Peak memory consumption was 475.4 MB. Max. memory is 11.5 GB. [2019-11-28 00:26:08,891 INFO L168 Benchmark]: Witness Printer took 64.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 00:26:08,894 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.59 ms. Allocated memory is still 1.0 GB. Free memory is still 987.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 280.46 ms. Allocated memory is still 1.0 GB. Free memory was 961.7 MB in the beginning and 951.0 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.97 ms. Allocated memory is still 1.0 GB. Free memory is still 951.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 72.85 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 139.5 MB). Free memory was 951.0 MB in the beginning and 1.1 GB in the end (delta: -183.4 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 200.75 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 18.5 MB). Peak memory consumption was 18.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 21987.17 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 417.9 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 57.6 MB). Peak memory consumption was 475.4 MB. Max. memory is 11.5 GB. * Witness Printer took 64.53 ms. Allocated memory is still 1.6 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 15 locations, 1 error locations. Result: SAFE, OverallTime: 21.8s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 281 SDtfs, 766 SDslu, 2777 SDs, 0 SdLazy, 2222 SolverSat, 168 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2611 GetRequests, 2020 SyntacticMatches, 2 SemanticMatches, 589 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2891 ImplicationChecksByTransitivity, 7.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 10.8s InterpolantComputationTime, 3159 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3116 ConstructedInterpolants, 0 QuantifiedInterpolants, 786688 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3717 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...