./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f470102c 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_i10_o10-2.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 d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-f470102 [2019-11-28 17:29:52,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-28 17:29:52,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-28 17:29:52,993 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-28 17:29:52,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-28 17:29:52,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-28 17:29:52,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-28 17:29:52,998 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-28 17:29:53,000 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-28 17:29:53,002 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-28 17:29:53,003 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-28 17:29:53,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-28 17:29:53,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-28 17:29:53,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-28 17:29:53,007 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-28 17:29:53,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-28 17:29:53,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-28 17:29:53,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-28 17:29:53,013 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-28 17:29:53,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-28 17:29:53,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-28 17:29:53,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-28 17:29:53,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-28 17:29:53,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-28 17:29:53,024 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-28 17:29:53,025 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-28 17:29:53,025 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-28 17:29:53,026 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-28 17:29:53,027 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-28 17:29:53,028 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-28 17:29:53,028 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-28 17:29:53,029 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-28 17:29:53,030 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-28 17:29:53,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-28 17:29:53,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-28 17:29:53,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-28 17:29:53,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-28 17:29:53,034 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-28 17:29:53,036 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-28 17:29:53,038 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-28 17:29:53,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-28 17:29:53,042 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-28 17:29:53,066 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-28 17:29:53,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-28 17:29:53,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-28 17:29:53,069 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-28 17:29:53,069 INFO L138 SettingsManager]: * Use SBE=true [2019-11-28 17:29:53,070 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-28 17:29:53,070 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-28 17:29:53,070 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-28 17:29:53,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-28 17:29:53,071 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-28 17:29:53,072 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-28 17:29:53,072 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-28 17:29:53,072 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-28 17:29:53,072 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-28 17:29:53,072 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-28 17:29:53,073 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-28 17:29:53,073 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-28 17:29:53,073 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-28 17:29:53,073 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-28 17:29:53,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-28 17:29:53,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-28 17:29:53,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-28 17:29:53,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-28 17:29:53,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-28 17:29:53,075 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-28 17:29:53,075 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-28 17:29:53,076 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-28 17:29:53,076 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-28 17:29:53,076 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2019-11-28 17:29:53,077 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 -> d354f5dc1a4e4616bf2c7c7fc4888805a134a8dd [2019-11-28 17:29:53,379 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-28 17:29:53,395 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-28 17:29:53,399 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-28 17:29:53,404 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-28 17:29:53,404 INFO L275 PluginConnector]: CDTParser initialized [2019-11-28 17:29:53,405 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-28 17:29:53,476 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2afc889/c8d1caf544c941c8ab0defd9ec4b4629/FLAGc68ba1dc2 [2019-11-28 17:29:53,896 INFO L306 CDTParser]: Found 1 translation units. [2019-11-28 17:29:53,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-simple/id_i10_o10-2.c [2019-11-28 17:29:53,903 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2afc889/c8d1caf544c941c8ab0defd9ec4b4629/FLAGc68ba1dc2 [2019-11-28 17:29:54,301 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7e2afc889/c8d1caf544c941c8ab0defd9ec4b4629 [2019-11-28 17:29:54,305 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-28 17:29:54,307 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-28 17:29:54,308 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:54,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-28 17:29:54,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-28 17:29:54,313 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,316 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed32ae8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54, skipping insertion in model container [2019-11-28 17:29:54,316 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,324 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-28 17:29:54,343 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-28 17:29:54,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:54,513 INFO L203 MainTranslator]: Completed pre-run [2019-11-28 17:29:54,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-28 17:29:54,542 INFO L208 MainTranslator]: Completed translation [2019-11-28 17:29:54,543 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54 WrapperNode [2019-11-28 17:29:54,543 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-28 17:29:54,544 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:54,544 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-28 17:29:54,544 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-28 17:29:54,552 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,556 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,570 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-28 17:29:54,571 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-28 17:29:54,571 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-28 17:29:54,571 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-28 17:29:54,650 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,650 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,651 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,653 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,658 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (1/1) ... [2019-11-28 17:29:54,659 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-28 17:29:54,660 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-28 17:29:54,660 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-28 17:29:54,660 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-28 17:29:54,661 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (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 17:29:54,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-28 17:29:54,725 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-28 17:29:54,726 INFO L130 BoogieDeclarations]: Found specification of procedure id [2019-11-28 17:29:54,727 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2019-11-28 17:29:54,892 INFO L282 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-28 17:29:54,892 INFO L287 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-28 17:29:54,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:54 BoogieIcfgContainer [2019-11-28 17:29:54,893 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-28 17:29:54,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-28 17:29:54,895 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-28 17:29:54,898 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-28 17:29:54,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 05:29:54" (1/3) ... [2019-11-28 17:29:54,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74229a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:54, skipping insertion in model container [2019-11-28 17:29:54,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 05:29:54" (2/3) ... [2019-11-28 17:29:54,899 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74229a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 05:29:54, skipping insertion in model container [2019-11-28 17:29:54,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:54" (3/3) ... [2019-11-28 17:29:54,901 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i10_o10-2.c [2019-11-28 17:29:54,909 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-28 17:29:54,915 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-28 17:29:54,924 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-28 17:29:54,950 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-28 17:29:54,950 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-28 17:29:54,950 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-28 17:29:54,950 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-28 17:29:54,950 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-28 17:29:54,951 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-28 17:29:54,951 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-28 17:29:54,951 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-28 17:29:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2019-11-28 17:29:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-28 17:29:54,971 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:54,972 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:54,973 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:54,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:54,978 INFO L82 PathProgramCache]: Analyzing trace with hash 389977641, now seen corresponding path program 1 times [2019-11-28 17:29:54,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:54,985 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247803587] [2019-11-28 17:29:54,985 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:55,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,174 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 17:29:55,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247803587] [2019-11-28 17:29:55,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-28 17:29:55,183 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-28 17:29:55,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538052594] [2019-11-28 17:29:55,202 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-28 17:29:55,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:55,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-28 17:29:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-28 17:29:55,247 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 5 states. [2019-11-28 17:29:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:55,419 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2019-11-28 17:29:55,420 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-28 17:29:55,422 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-28 17:29:55,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:55,436 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:29:55,437 INFO L226 Difference]: Without dead ends: 14 [2019-11-28 17:29:55,446 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 17:29:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-11-28 17:29:55,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-11-28 17:29:55,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-11-28 17:29:55,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2019-11-28 17:29:55,502 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2019-11-28 17:29:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:55,503 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2019-11-28 17:29:55,504 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-28 17:29:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2019-11-28 17:29:55,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-28 17:29:55,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:55,507 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:55,508 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:55,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:55,509 INFO L82 PathProgramCache]: Analyzing trace with hash -881029229, now seen corresponding path program 1 times [2019-11-28 17:29:55,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:55,510 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004007157] [2019-11-28 17:29:55,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,681 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 17:29:55,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004007157] [2019-11-28 17:29:55,682 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192927457] [2019-11-28 17:29:55,682 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 17:29:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:55,733 INFO L264 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-28 17:29:55,741 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:55,811 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 17:29:55,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:55,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2019-11-28 17:29:55,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143102000] [2019-11-28 17:29:55,815 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-28 17:29:55,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:55,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-28 17:29:55,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-28 17:29:55,817 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2019-11-28 17:29:55,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:55,897 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2019-11-28 17:29:55,898 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-28 17:29:55,898 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-11-28 17:29:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:55,899 INFO L225 Difference]: With dead ends: 21 [2019-11-28 17:29:55,899 INFO L226 Difference]: Without dead ends: 17 [2019-11-28 17:29:55,900 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 17:29:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-28 17:29:55,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-28 17:29:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-28 17:29:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2019-11-28 17:29:55,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2019-11-28 17:29:55,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:55,909 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2019-11-28 17:29:55,909 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-28 17:29:55,910 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2019-11-28 17:29:55,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-28 17:29:55,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:55,913 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:56,118 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:56,119 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:56,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:56,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1824240471, now seen corresponding path program 2 times [2019-11-28 17:29:56,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:56,120 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599374787] [2019-11-28 17:29:56,120 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,286 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 17:29:56,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599374787] [2019-11-28 17:29:56,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467254934] [2019-11-28 17:29:56,287 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 17:29:56,332 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:29:56,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:56,333 INFO L264 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-28 17:29:56,336 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:56,374 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 17:29:56,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:56,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2019-11-28 17:29:56,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252191226] [2019-11-28 17:29:56,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-28 17:29:56,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:56,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-28 17:29:56,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-28 17:29:56,378 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2019-11-28 17:29:56,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:56,464 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-11-28 17:29:56,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-28 17:29:56,466 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-28 17:29:56,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:56,467 INFO L225 Difference]: With dead ends: 24 [2019-11-28 17:29:56,467 INFO L226 Difference]: Without dead ends: 20 [2019-11-28 17:29:56,469 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 17:29:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-28 17:29:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-28 17:29:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-28 17:29:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-11-28 17:29:56,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2019-11-28 17:29:56,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:56,476 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-11-28 17:29:56,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-28 17:29:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-11-28 17:29:56,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-28 17:29:56,477 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:56,477 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:56,678 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:56,679 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:56,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:56,680 INFO L82 PathProgramCache]: Analyzing trace with hash -28473709, now seen corresponding path program 3 times [2019-11-28 17:29:56,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:56,681 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106220200] [2019-11-28 17:29:56,681 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:56,892 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 17:29:56,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106220200] [2019-11-28 17:29:56,893 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749497508] [2019-11-28 17:29:56,893 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 17:29:56,928 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-28 17:29:56,928 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:56,929 INFO L264 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-28 17:29:56,931 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:56,970 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 17:29:56,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:56,970 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2019-11-28 17:29:56,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300287448] [2019-11-28 17:29:56,971 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-28 17:29:56,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:56,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-28 17:29:56,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-28 17:29:56,972 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2019-11-28 17:29:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:57,076 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2019-11-28 17:29:57,076 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-28 17:29:57,077 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2019-11-28 17:29:57,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:57,078 INFO L225 Difference]: With dead ends: 27 [2019-11-28 17:29:57,078 INFO L226 Difference]: Without dead ends: 23 [2019-11-28 17:29:57,079 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 17:29:57,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-28 17:29:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-28 17:29:57,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-28 17:29:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2019-11-28 17:29:57,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2019-11-28 17:29:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:57,093 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2019-11-28 17:29:57,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-28 17:29:57,095 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2019-11-28 17:29:57,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-28 17:29:57,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:57,096 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:57,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:57,298 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:57,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:57,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2080894167, now seen corresponding path program 4 times [2019-11-28 17:29:57,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:57,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601113284] [2019-11-28 17:29:57,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,489 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 17:29:57,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601113284] [2019-11-28 17:29:57,490 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41417445] [2019-11-28 17:29:57,490 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 17:29:57,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:29:57,526 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:57,527 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-28 17:29:57,529 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:57,581 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 17:29:57,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:57,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2019-11-28 17:29:57,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069796485] [2019-11-28 17:29:57,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-28 17:29:57,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:57,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-28 17:29:57,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-28 17:29:57,584 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 11 states. [2019-11-28 17:29:57,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:57,668 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2019-11-28 17:29:57,668 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-28 17:29:57,668 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-28 17:29:57,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:57,670 INFO L225 Difference]: With dead ends: 30 [2019-11-28 17:29:57,670 INFO L226 Difference]: Without dead ends: 26 [2019-11-28 17:29:57,671 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 17:29:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-28 17:29:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-28 17:29:57,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-28 17:29:57,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2019-11-28 17:29:57,677 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2019-11-28 17:29:57,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:57,678 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2019-11-28 17:29:57,678 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-28 17:29:57,678 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2019-11-28 17:29:57,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-28 17:29:57,679 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:57,680 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:57,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:57,885 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:57,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:57,886 INFO L82 PathProgramCache]: Analyzing trace with hash -687460973, now seen corresponding path program 5 times [2019-11-28 17:29:57,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:57,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258453734] [2019-11-28 17:29:57,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,174 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 17:29:58,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258453734] [2019-11-28 17:29:58,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106593312] [2019-11-28 17:29:58,175 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 17:29:58,220 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-28 17:29:58,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:58,222 INFO L264 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-28 17:29:58,230 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:58,304 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 17:29:58,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:58,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2019-11-28 17:29:58,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762574057] [2019-11-28 17:29:58,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-28 17:29:58,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:58,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-28 17:29:58,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2019-11-28 17:29:58,309 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 12 states. [2019-11-28 17:29:58,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:58,406 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2019-11-28 17:29:58,407 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-28 17:29:58,407 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2019-11-28 17:29:58,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:58,408 INFO L225 Difference]: With dead ends: 33 [2019-11-28 17:29:58,409 INFO L226 Difference]: Without dead ends: 29 [2019-11-28 17:29:58,410 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:29:58,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-28 17:29:58,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-28 17:29:58,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-28 17:29:58,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-28 17:29:58,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2019-11-28 17:29:58,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:58,417 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-28 17:29:58,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-28 17:29:58,418 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-28 17:29:58,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-28 17:29:58,419 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:58,419 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:58,624 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:58,624 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:58,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:58,625 INFO L82 PathProgramCache]: Analyzing trace with hash 547744169, now seen corresponding path program 6 times [2019-11-28 17:29:58,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:58,626 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193393589] [2019-11-28 17:29:58,626 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:58,844 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 17:29:58,844 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193393589] [2019-11-28 17:29:58,845 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081137894] [2019-11-28 17:29:58,845 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 17:29:58,891 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-28 17:29:58,892 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:29:58,893 INFO L264 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-28 17:29:58,897 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:58,951 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 17:29:58,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:58,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2019-11-28 17:29:58,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708886064] [2019-11-28 17:29:58,952 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-28 17:29:58,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:58,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-28 17:29:58,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2019-11-28 17:29:58,953 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 13 states. [2019-11-28 17:29:59,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:59,066 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-11-28 17:29:59,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-28 17:29:59,066 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-28 17:29:59,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:59,068 INFO L225 Difference]: With dead ends: 36 [2019-11-28 17:29:59,068 INFO L226 Difference]: Without dead ends: 32 [2019-11-28 17:29:59,069 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 17:29:59,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-28 17:29:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-28 17:29:59,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-28 17:29:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2019-11-28 17:29:59,076 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2019-11-28 17:29:59,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:59,076 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2019-11-28 17:29:59,076 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-28 17:29:59,077 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2019-11-28 17:29:59,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-28 17:29:59,078 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:59,079 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:29:59,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:29:59,291 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:29:59,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:29:59,292 INFO L82 PathProgramCache]: Analyzing trace with hash -247823213, now seen corresponding path program 7 times [2019-11-28 17:29:59,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:29:59,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533031138] [2019-11-28 17:29:59,294 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:29:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,551 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 17:29:59,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533031138] [2019-11-28 17:29:59,552 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941228081] [2019-11-28 17:29:59,553 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 17:29:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:29:59,596 INFO L264 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-28 17:29:59,599 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:29:59,677 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 17:29:59,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:29:59,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2019-11-28 17:29:59,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274318317] [2019-11-28 17:29:59,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-28 17:29:59,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:29:59,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-28 17:29:59,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-11-28 17:29:59,684 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 14 states. [2019-11-28 17:29:59,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:29:59,804 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2019-11-28 17:29:59,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-28 17:29:59,805 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-28 17:29:59,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:29:59,806 INFO L225 Difference]: With dead ends: 39 [2019-11-28 17:29:59,806 INFO L226 Difference]: Without dead ends: 35 [2019-11-28 17:29:59,807 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 17:29:59,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-28 17:29:59,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-28 17:29:59,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-28 17:29:59,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2019-11-28 17:29:59,813 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2019-11-28 17:29:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:29:59,814 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2019-11-28 17:29:59,814 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-28 17:29:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2019-11-28 17:29:59,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-28 17:29:59,815 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:29:59,815 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:00,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,020 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:00,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:00,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1818636247, now seen corresponding path program 8 times [2019-11-28 17:30:00,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:00,021 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939196977] [2019-11-28 17:30:00,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,274 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 17:30:00,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939196977] [2019-11-28 17:30:00,275 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603346350] [2019-11-28 17:30:00,275 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 17:30:00,318 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-28 17:30:00,318 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:00,320 INFO L264 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-28 17:30:00,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:00,387 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 17:30:00,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:00,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2019-11-28 17:30:00,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042811523] [2019-11-28 17:30:00,391 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-28 17:30:00,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:00,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-28 17:30:00,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2019-11-28 17:30:00,393 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 15 states. [2019-11-28 17:30:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:00,535 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2019-11-28 17:30:00,535 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-28 17:30:00,536 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2019-11-28 17:30:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:00,537 INFO L225 Difference]: With dead ends: 42 [2019-11-28 17:30:00,537 INFO L226 Difference]: Without dead ends: 38 [2019-11-28 17:30:00,538 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 17:30:00,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-11-28 17:30:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-11-28 17:30:00,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-28 17:30:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2019-11-28 17:30:00,545 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2019-11-28 17:30:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:00,545 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2019-11-28 17:30:00,546 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-28 17:30:00,546 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2019-11-28 17:30:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-28 17:30:00,547 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:00,548 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:00,752 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:00,752 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash -2055304301, now seen corresponding path program 9 times [2019-11-28 17:30:00,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:00,754 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164288081] [2019-11-28 17:30:00,754 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:00,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,080 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 17:30:01,080 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164288081] [2019-11-28 17:30:01,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53243084] [2019-11-28 17:30:01,081 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 17:30:01,142 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-28 17:30:01,142 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:01,144 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-28 17:30:01,147 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:01,212 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 17:30:01,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:01,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2019-11-28 17:30:01,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306958536] [2019-11-28 17:30:01,214 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:30:01,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:01,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:30:01,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2019-11-28 17:30:01,216 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 16 states. [2019-11-28 17:30:01,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:01,350 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2019-11-28 17:30:01,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-28 17:30:01,351 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 63 [2019-11-28 17:30:01,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:01,352 INFO L225 Difference]: With dead ends: 45 [2019-11-28 17:30:01,353 INFO L226 Difference]: Without dead ends: 41 [2019-11-28 17:30:01,356 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 17:30:01,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-28 17:30:01,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-28 17:30:01,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-28 17:30:01,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-11-28 17:30:01,367 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2019-11-28 17:30:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:01,368 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-11-28 17:30:01,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:30:01,368 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-11-28 17:30:01,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-28 17:30:01,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:01,372 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:01,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:01,573 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:01,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1172322647, now seen corresponding path program 10 times [2019-11-28 17:30:01,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:01,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536806764] [2019-11-28 17:30:01,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:01,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:01,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:02,343 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 17:30:02,343 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536806764] [2019-11-28 17:30:02,344 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921693327] [2019-11-28 17:30:02,344 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 17:30:02,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-28 17:30:02,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:02,394 INFO L264 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-28 17:30:02,403 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:02,490 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 17:30:02,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-28 17:30:02,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2019-11-28 17:30:02,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445996385] [2019-11-28 17:30:02,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-28 17:30:02,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:02,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-28 17:30:02,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:30:02,493 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 25 states. [2019-11-28 17:30:02,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:02,765 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2019-11-28 17:30:02,766 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-28 17:30:02,766 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-11-28 17:30:02,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:02,767 INFO L225 Difference]: With dead ends: 48 [2019-11-28 17:30:02,767 INFO L226 Difference]: Without dead ends: 44 [2019-11-28 17:30:02,768 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-11-28 17:30:02,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-28 17:30:02,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-11-28 17:30:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-28 17:30:02,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2019-11-28 17:30:02,774 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2019-11-28 17:30:02,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:02,775 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2019-11-28 17:30:02,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-28 17:30:02,775 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2019-11-28 17:30:02,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-28 17:30:02,776 INFO L402 BasicCegarLoop]: Found error trace [2019-11-28 17:30:02,776 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2019-11-28 17:30:02,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:02,981 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-28 17:30:02,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-28 17:30:02,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1452916077, now seen corresponding path program 11 times [2019-11-28 17:30:02,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-28 17:30:02,982 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496212902] [2019-11-28 17:30:02,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-28 17:30:02,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-28 17:30:03,321 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 165 proven. 22 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:03,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496212902] [2019-11-28 17:30:03,322 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807703221] [2019-11-28 17:30:03,322 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 17:30:03,374 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-28 17:30:03,374 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-28 17:30:03,375 INFO L264 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-28 17:30:03,378 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2019-11-28 17:30:03,434 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-28 17:30:03,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-28 17:30:03,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [16] total 18 [2019-11-28 17:30:03,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240304661] [2019-11-28 17:30:03,436 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-28 17:30:03,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-28 17:30:03,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-28 17:30:03,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2019-11-28 17:30:03,437 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 16 states. [2019-11-28 17:30:03,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-28 17:30:03,673 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2019-11-28 17:30:03,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-28 17:30:03,674 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 75 [2019-11-28 17:30:03,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-28 17:30:03,674 INFO L225 Difference]: With dead ends: 44 [2019-11-28 17:30:03,674 INFO L226 Difference]: Without dead ends: 0 [2019-11-28 17:30:03,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2019-11-28 17:30:03,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-28 17:30:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-28 17:30:03,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-28 17:30:03,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-28 17:30:03,677 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2019-11-28 17:30:03,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-28 17:30:03,677 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-28 17:30:03,677 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-28 17:30:03,677 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-28 17:30:03,677 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-28 17:30:03,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-28 17:30:03,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-28 17:30:03,909 INFO L246 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-28 17:30:03,910 INFO L246 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-28 17:30:03,910 INFO L246 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-28 17:30:03,910 INFO L246 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2019-11-28 17:30:03,910 INFO L246 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2019-11-28 17:30:03,910 INFO L246 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2019-11-28 17:30:03,911 INFO L242 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= ULTIMATE.start_main_~input~0 10) (<= 10 ULTIMATE.start_main_~input~0)) [2019-11-28 17:30:03,911 INFO L246 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2019-11-28 17:30:03,911 INFO L246 CegarLoopResult]: For program point L9(lines 9 15) no Hoare annotation was computed. [2019-11-28 17:30:03,911 INFO L246 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2019-11-28 17:30:03,911 INFO L246 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2019-11-28 17:30:03,912 INFO L249 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2019-11-28 17:30:03,912 INFO L242 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2019-11-28 17:30:03,912 INFO L246 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2019-11-28 17:30:03,912 INFO L246 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-28 17:30:03,917 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 05:30:03 BoogieIcfgContainer [2019-11-28 17:30:03,917 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-28 17:30:03,918 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-28 17:30:03,918 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-28 17:30:03,918 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-28 17:30:03,918 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 05:29:54" (3/4) ... [2019-11-28 17:30:03,922 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-28 17:30:03,928 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2019-11-28 17:30:03,932 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2019-11-28 17:30:03,932 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-28 17:30:03,968 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2019-11-28 17:30:03,968 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-28 17:30:03,970 INFO L168 Benchmark]: Toolchain (without parser) took 9663.68 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 285.2 MB). Free memory was 952.3 MB in the beginning and 1.0 GB in the end (delta: -55.8 MB). Peak memory consumption was 229.4 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:03,971 INFO L168 Benchmark]: CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:03,971 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.41 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:03,972 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:03,972 INFO L168 Benchmark]: Boogie Preprocessor took 88.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -200.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:03,973 INFO L168 Benchmark]: RCFGBuilder took 233.85 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:03,974 INFO L168 Benchmark]: TraceAbstraction took 9022.80 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 139.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 116.4 MB). Peak memory consumption was 255.9 MB. Max. memory is 11.5 GB. [2019-11-28 17:30:03,974 INFO L168 Benchmark]: Witness Printer took 50.77 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-28 17:30:03,977 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.85 ms. Allocated memory is still 1.0 GB. Free memory is still 981.8 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 235.41 ms. Allocated memory is still 1.0 GB. Free memory was 952.3 MB in the beginning and 941.6 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 27.01 ms. Allocated memory is still 1.0 GB. Free memory is still 941.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 88.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.8 MB). Free memory was 941.6 MB in the beginning and 1.1 GB in the end (delta: -200.6 MB). Peak memory consumption was 9.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 233.85 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: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 9022.80 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 139.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 116.4 MB). Peak memory consumption was 255.9 MB. Max. memory is 11.5 GB. * Witness Printer took 50.77 ms. Allocated memory is still 1.3 GB. Free memory is still 1.0 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: 8.9s, OverallIterations: 12, TraceHistogramMax: 12, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 252 SDslu, 945 SDs, 0 SdLazy, 713 SolverSat, 64 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 821 GetRequests, 620 SyntacticMatches, 2 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=11, 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, 12 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: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 999 NumberOfCodeBlocks, 994 NumberOfCodeBlocksAsserted, 60 NumberOfCheckSat, 976 ConstructedInterpolants, 0 QuantifiedInterpolants, 141088 SizeOfPredicates, 77 NumberOfNonLiveVariables, 1157 ConjunctsInSsa, 199 ConjunctsInUnsatCore, 23 InterpolantComputations, 2 PerfectInterpolantSequences, 1936/3168 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...