./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c -s /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer --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 17da727b994aaa75d870178ca09f053b93a70f18 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 03:43:39,868 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 03:43:39,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 03:43:39,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 03:43:39,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 03:43:39,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 03:43:39,888 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 03:43:39,897 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 03:43:39,901 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 03:43:39,905 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 03:43:39,906 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 03:43:39,907 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 03:43:39,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 03:43:39,909 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 03:43:39,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 03:43:39,911 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 03:43:39,912 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 03:43:39,912 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 03:43:39,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 03:43:39,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 03:43:39,921 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 03:43:39,923 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 03:43:39,925 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 03:43:39,926 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 03:43:39,929 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 03:43:39,929 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 03:43:39,929 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 03:43:39,930 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 03:43:39,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 03:43:39,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 03:43:39,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 03:43:39,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 03:43:39,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 03:43:39,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 03:43:39,934 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 03:43:39,935 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 03:43:39,935 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 03:43:39,935 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 03:43:39,935 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 03:43:39,936 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 03:43:39,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 03:43:39,938 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 03:43:39,961 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 03:43:39,961 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 03:43:39,962 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 03:43:39,962 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 03:43:39,962 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 03:43:39,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 03:43:39,963 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 03:43:39,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 03:43:39,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 03:43:39,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 03:43:39,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 03:43:39,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 03:43:39,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 03:43:39,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 03:43:39,965 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 03:43:39,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 03:43:39,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 03:43:39,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 03:43:39,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 03:43:39,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 03:43:39,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 03:43:39,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 03:43:39,966 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 03:43:39,967 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 -> /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer 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 -> 17da727b994aaa75d870178ca09f053b93a70f18 [2019-11-20 03:43:40,147 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 03:43:40,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 03:43:40,162 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 03:43:40,163 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 03:43:40,164 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 03:43:40,164 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/../../sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-20 03:43:40,213 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/data/c986755df/8d04847d28604c70a33ced11ce25e71f/FLAG46309ea49 [2019-11-20 03:43:40,623 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 03:43:40,624 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/sv-benchmarks/c/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-11-20 03:43:40,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/data/c986755df/8d04847d28604c70a33ced11ce25e71f/FLAG46309ea49 [2019-11-20 03:43:40,641 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/data/c986755df/8d04847d28604c70a33ced11ce25e71f [2019-11-20 03:43:40,644 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 03:43:40,645 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 03:43:40,646 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 03:43:40,646 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 03:43:40,649 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 03:43:40,650 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,652 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b78e6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40, skipping insertion in model container [2019-11-20 03:43:40,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,659 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 03:43:40,684 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 03:43:40,840 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:43:40,845 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 03:43:40,930 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 03:43:40,943 INFO L192 MainTranslator]: Completed translation [2019-11-20 03:43:40,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40 WrapperNode [2019-11-20 03:43:40,943 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 03:43:40,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 03:43:40,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 03:43:40,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 03:43:40,952 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,958 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,977 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 03:43:40,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 03:43:40,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 03:43:40,978 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 03:43:40,986 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,988 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,991 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,995 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... [2019-11-20 03:43:40,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 03:43:40,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 03:43:40,997 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 03:43:40,997 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 03:43:40,998 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:41,058 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 03:43:41,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 03:43:41,318 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 03:43:41,318 INFO L285 CfgBuilder]: Removed 4 assume(true) statements. [2019-11-20 03:43:41,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:43:41 BoogieIcfgContainer [2019-11-20 03:43:41,319 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 03:43:41,320 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 03:43:41,320 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 03:43:41,322 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 03:43:41,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 03:43:40" (1/3) ... [2019-11-20 03:43:41,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a2d7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:43:41, skipping insertion in model container [2019-11-20 03:43:41,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 03:43:40" (2/3) ... [2019-11-20 03:43:41,324 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a2d7fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 03:43:41, skipping insertion in model container [2019-11-20 03:43:41,324 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:43:41" (3/3) ... [2019-11-20 03:43:41,326 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-11-20 03:43:41,334 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 03:43:41,340 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-20 03:43:41,349 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-20 03:43:41,369 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 03:43:41,369 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 03:43:41,370 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 03:43:41,370 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 03:43:41,370 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 03:43:41,370 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 03:43:41,370 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 03:43:41,371 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 03:43:41,383 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-11-20 03:43:41,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 03:43:41,389 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:41,390 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:41,390 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:41,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:41,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1745867070, now seen corresponding path program 1 times [2019-11-20 03:43:41,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:41,404 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812142449] [2019-11-20 03:43:41,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:41,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:41,548 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812142449] [2019-11-20 03:43:41,549 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:43:41,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 03:43:41,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065330260] [2019-11-20 03:43:41,555 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:43:41,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:41,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:43:41,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:41,567 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-11-20 03:43:41,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:41,684 INFO L93 Difference]: Finished difference Result 52 states and 90 transitions. [2019-11-20 03:43:41,685 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:43:41,686 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-20 03:43:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:41,696 INFO L225 Difference]: With dead ends: 52 [2019-11-20 03:43:41,696 INFO L226 Difference]: Without dead ends: 25 [2019-11-20 03:43:41,699 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:41,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-20 03:43:41,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-20 03:43:41,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 03:43:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2019-11-20 03:43:41,732 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 23 [2019-11-20 03:43:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:41,732 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2019-11-20 03:43:41,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:43:41,733 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2019-11-20 03:43:41,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 03:43:41,734 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:41,735 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:41,735 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:41,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash -936932661, now seen corresponding path program 1 times [2019-11-20 03:43:41,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:41,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44324950] [2019-11-20 03:43:41,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:41,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:41,781 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44324950] [2019-11-20 03:43:41,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:43:41,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-20 03:43:41,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867831722] [2019-11-20 03:43:41,783 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 03:43:41,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:41,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 03:43:41,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:43:41,784 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand 4 states. [2019-11-20 03:43:41,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:41,876 INFO L93 Difference]: Finished difference Result 44 states and 61 transitions. [2019-11-20 03:43:41,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 03:43:41,877 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-11-20 03:43:41,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:41,878 INFO L225 Difference]: With dead ends: 44 [2019-11-20 03:43:41,878 INFO L226 Difference]: Without dead ends: 25 [2019-11-20 03:43:41,879 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 03:43:41,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-20 03:43:41,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-20 03:43:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-20 03:43:41,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2019-11-20 03:43:41,883 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 23 [2019-11-20 03:43:41,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:41,883 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2019-11-20 03:43:41,883 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 03:43:41,884 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2019-11-20 03:43:41,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 03:43:41,884 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:41,885 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:41,885 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:41,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:41,885 INFO L82 PathProgramCache]: Analyzing trace with hash -2008089875, now seen corresponding path program 1 times [2019-11-20 03:43:41,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:41,886 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252169395] [2019-11-20 03:43:41,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:41,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:41,937 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252169395] [2019-11-20 03:43:41,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:43:41,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 03:43:41,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023334515] [2019-11-20 03:43:41,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:43:41,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:41,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:43:41,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:41,939 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand 3 states. [2019-11-20 03:43:42,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:42,020 INFO L93 Difference]: Finished difference Result 54 states and 76 transitions. [2019-11-20 03:43:42,021 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:43:42,021 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-20 03:43:42,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:42,022 INFO L225 Difference]: With dead ends: 54 [2019-11-20 03:43:42,022 INFO L226 Difference]: Without dead ends: 39 [2019-11-20 03:43:42,023 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-20 03:43:42,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-20 03:43:42,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-20 03:43:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 48 transitions. [2019-11-20 03:43:42,030 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 48 transitions. Word has length 23 [2019-11-20 03:43:42,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:42,031 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 48 transitions. [2019-11-20 03:43:42,031 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:43:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 48 transitions. [2019-11-20 03:43:42,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 03:43:42,032 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:42,032 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:42,033 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash 635511084, now seen corresponding path program 1 times [2019-11-20 03:43:42,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:42,034 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080213106] [2019-11-20 03:43:42,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:42,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:42,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080213106] [2019-11-20 03:43:42,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:43:42,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2019-11-20 03:43:42,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729459461] [2019-11-20 03:43:42,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 03:43:42,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:42,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 03:43:42,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-20 03:43:42,247 INFO L87 Difference]: Start difference. First operand 39 states and 48 transitions. Second operand 12 states. [2019-11-20 03:43:42,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:42,371 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2019-11-20 03:43:42,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 03:43:42,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2019-11-20 03:43:42,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:42,372 INFO L225 Difference]: With dead ends: 46 [2019-11-20 03:43:42,372 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 03:43:42,373 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-20 03:43:42,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 03:43:42,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 03:43:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 03:43:42,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-20 03:43:42,377 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 23 [2019-11-20 03:43:42,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:42,377 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-20 03:43:42,377 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 03:43:42,377 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-20 03:43:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 03:43:42,378 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:42,378 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:42,379 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:42,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:42,379 INFO L82 PathProgramCache]: Analyzing trace with hash 423677772, now seen corresponding path program 1 times [2019-11-20 03:43:42,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:42,379 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000871983] [2019-11-20 03:43:42,379 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:42,412 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:42,412 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000871983] [2019-11-20 03:43:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:43:42,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-20 03:43:42,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021764565] [2019-11-20 03:43:42,413 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 03:43:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:42,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 03:43:42,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:42,414 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 3 states. [2019-11-20 03:43:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:42,450 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2019-11-20 03:43:42,451 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 03:43:42,451 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-20 03:43:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:42,452 INFO L225 Difference]: With dead ends: 32 [2019-11-20 03:43:42,452 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 03:43:42,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 03:43:42,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 03:43:42,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 03:43:42,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 03:43:42,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2019-11-20 03:43:42,457 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2019-11-20 03:43:42,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:42,457 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2019-11-20 03:43:42,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 03:43:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2019-11-20 03:43:42,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 03:43:42,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:42,458 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:42,458 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:42,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:42,459 INFO L82 PathProgramCache]: Analyzing trace with hash -875092666, now seen corresponding path program 1 times [2019-11-20 03:43:42,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:42,459 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426989081] [2019-11-20 03:43:42,459 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:42,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426989081] [2019-11-20 03:43:42,633 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402818539] [2019-11-20 03:43:42,633 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:42,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:42,671 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:43:42,680 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:42,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:42,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2019-11-20 03:43:42,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261978520] [2019-11-20 03:43:42,736 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 03:43:42,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:42,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 03:43:42,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:43:42,738 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 14 states. [2019-11-20 03:43:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:42,873 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2019-11-20 03:43:42,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 03:43:42,874 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 27 [2019-11-20 03:43:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:42,875 INFO L225 Difference]: With dead ends: 38 [2019-11-20 03:43:42,875 INFO L226 Difference]: Without dead ends: 33 [2019-11-20 03:43:42,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2019-11-20 03:43:42,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-20 03:43:42,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-20 03:43:42,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 03:43:42,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-11-20 03:43:42,880 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 27 [2019-11-20 03:43:42,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:42,881 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-11-20 03:43:42,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 03:43:42,881 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-11-20 03:43:42,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 03:43:42,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:42,886 INFO L410 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:43,088 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:43,090 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:43,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:43,090 INFO L82 PathProgramCache]: Analyzing trace with hash 680828224, now seen corresponding path program 2 times [2019-11-20 03:43:43,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:43,091 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943234795] [2019-11-20 03:43:43,091 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:43,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:43,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:43,316 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943234795] [2019-11-20 03:43:43,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481973715] [2019-11-20 03:43:43,317 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:43,358 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:43:43,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:43,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-20 03:43:43,364 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:43,382 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:43,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:43,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2019-11-20 03:43:43,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141908870] [2019-11-20 03:43:43,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 03:43:43,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:43,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 03:43:43,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:43:43,384 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 16 states. [2019-11-20 03:43:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:43,522 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-11-20 03:43:43,522 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 03:43:43,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 31 [2019-11-20 03:43:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:43,523 INFO L225 Difference]: With dead ends: 42 [2019-11-20 03:43:43,523 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 03:43:43,524 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2019-11-20 03:43:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 03:43:43,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-20 03:43:43,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 03:43:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-11-20 03:43:43,528 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-11-20 03:43:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:43,529 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-11-20 03:43:43,529 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 03:43:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-11-20 03:43:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-20 03:43:43,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:43,533 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:43,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:43,736 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:43,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:43,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2038532154, now seen corresponding path program 3 times [2019-11-20 03:43:43,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:43,737 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249688242] [2019-11-20 03:43:43,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:44,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249688242] [2019-11-20 03:43:44,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718685037] [2019-11-20 03:43:44,005 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:44,045 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-20 03:43:44,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:44,046 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 03:43:44,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-11-20 03:43:44,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:44,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4] total 20 [2019-11-20 03:43:44,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122385512] [2019-11-20 03:43:44,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 03:43:44,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 03:43:44,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:43:44,114 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 20 states. [2019-11-20 03:43:44,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:44,250 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2019-11-20 03:43:44,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-20 03:43:44,250 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 35 [2019-11-20 03:43:44,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:44,251 INFO L225 Difference]: With dead ends: 48 [2019-11-20 03:43:44,251 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 03:43:44,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-11-20 03:43:44,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 03:43:44,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-11-20 03:43:44,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-20 03:43:44,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2019-11-20 03:43:44,257 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 35 [2019-11-20 03:43:44,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:44,257 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2019-11-20 03:43:44,257 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 03:43:44,257 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2019-11-20 03:43:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-20 03:43:44,258 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:44,258 INFO L410 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:44,460 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:44,460 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:44,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:44,461 INFO L82 PathProgramCache]: Analyzing trace with hash 699965998, now seen corresponding path program 4 times [2019-11-20 03:43:44,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:44,461 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140375861] [2019-11-20 03:43:44,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:44,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:44,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:44,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140375861] [2019-11-20 03:43:44,708 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983889016] [2019-11-20 03:43:44,708 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:44,736 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:43:44,736 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:44,737 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 03:43:44,739 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:44,751 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 03:43:44,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:44,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 21 [2019-11-20 03:43:44,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662103797] [2019-11-20 03:43:44,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 03:43:44,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:44,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 03:43:44,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-20 03:43:44,754 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 21 states. [2019-11-20 03:43:44,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:44,898 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2019-11-20 03:43:44,899 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-20 03:43:44,899 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 41 [2019-11-20 03:43:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:44,900 INFO L225 Difference]: With dead ends: 54 [2019-11-20 03:43:44,900 INFO L226 Difference]: Without dead ends: 48 [2019-11-20 03:43:44,900 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2019-11-20 03:43:44,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-20 03:43:44,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-11-20 03:43:44,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-20 03:43:44,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2019-11-20 03:43:44,912 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 41 [2019-11-20 03:43:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:44,912 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2019-11-20 03:43:44,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 03:43:44,912 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2019-11-20 03:43:44,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-20 03:43:44,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:44,913 INFO L410 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:45,113 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:45,118 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:45,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:45,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1691649285, now seen corresponding path program 5 times [2019-11-20 03:43:45,119 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:45,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884683661] [2019-11-20 03:43:45,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:45,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884683661] [2019-11-20 03:43:45,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567358330] [2019-11-20 03:43:45,492 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:45,535 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-20 03:43:45,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:45,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 03:43:45,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:45,739 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-20 03:43:45,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:45,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 8] total 30 [2019-11-20 03:43:45,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658606594] [2019-11-20 03:43:45,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-20 03:43:45,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:45,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-20 03:43:45,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-20 03:43:45,741 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 30 states. [2019-11-20 03:43:45,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:45,897 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2019-11-20 03:43:45,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-20 03:43:45,897 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 47 [2019-11-20 03:43:45,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:45,898 INFO L225 Difference]: With dead ends: 69 [2019-11-20 03:43:45,898 INFO L226 Difference]: Without dead ends: 63 [2019-11-20 03:43:45,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-11-20 03:43:45,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-20 03:43:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2019-11-20 03:43:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-11-20 03:43:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2019-11-20 03:43:45,905 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 47 [2019-11-20 03:43:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:45,905 INFO L462 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2019-11-20 03:43:45,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-20 03:43:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2019-11-20 03:43:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-20 03:43:45,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:45,907 INFO L410 BasicCegarLoop]: trace histogram [19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:46,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:46,116 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:46,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:46,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1432398724, now seen corresponding path program 6 times [2019-11-20 03:43:46,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:46,117 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106174573] [2019-11-20 03:43:46,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:46,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:46,563 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:46,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106174573] [2019-11-20 03:43:46,563 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794056855] [2019-11-20 03:43:46,564 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:46,606 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-20 03:43:46,606 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:46,607 INFO L255 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 03:43:46,609 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:46,904 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-20 03:43:46,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:46,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-11-20 03:43:46,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004500425] [2019-11-20 03:43:46,905 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-20 03:43:46,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:46,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-20 03:43:46,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 03:43:46,906 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand 41 states. [2019-11-20 03:43:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:47,140 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-20 03:43:47,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-20 03:43:47,140 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 61 [2019-11-20 03:43:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:47,141 INFO L225 Difference]: With dead ends: 99 [2019-11-20 03:43:47,142 INFO L226 Difference]: Without dead ends: 85 [2019-11-20 03:43:47,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 03:43:47,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-20 03:43:47,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-11-20 03:43:47,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-20 03:43:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2019-11-20 03:43:47,150 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 61 [2019-11-20 03:43:47,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:47,150 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2019-11-20 03:43:47,150 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-20 03:43:47,150 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2019-11-20 03:43:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-20 03:43:47,152 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:47,152 INFO L410 BasicCegarLoop]: trace histogram [30, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:47,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:47,355 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:47,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1851901513, now seen corresponding path program 7 times [2019-11-20 03:43:47,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:47,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015575799] [2019-11-20 03:43:47,356 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:47,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:48,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015575799] [2019-11-20 03:43:48,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958257862] [2019-11-20 03:43:48,200 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:48,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:48,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-20 03:43:48,265 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:48,300 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 399 proven. 420 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-20 03:43:48,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:48,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 32] total 42 [2019-11-20 03:43:48,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966584040] [2019-11-20 03:43:48,304 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-20 03:43:48,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:48,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-20 03:43:48,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 03:43:48,305 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 42 states. [2019-11-20 03:43:48,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:48,518 INFO L93 Difference]: Finished difference Result 128 states and 140 transitions. [2019-11-20 03:43:48,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-20 03:43:48,519 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 83 [2019-11-20 03:43:48,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:48,519 INFO L225 Difference]: With dead ends: 128 [2019-11-20 03:43:48,519 INFO L226 Difference]: Without dead ends: 106 [2019-11-20 03:43:48,520 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2019-11-20 03:43:48,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-20 03:43:48,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2019-11-20 03:43:48,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-20 03:43:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2019-11-20 03:43:48,531 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 83 [2019-11-20 03:43:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:48,531 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2019-11-20 03:43:48,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-20 03:43:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2019-11-20 03:43:48,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-11-20 03:43:48,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:48,533 INFO L410 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:48,733 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:48,733 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:48,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash 347622326, now seen corresponding path program 8 times [2019-11-20 03:43:48,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:48,734 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248004801] [2019-11-20 03:43:48,734 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:50,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248004801] [2019-11-20 03:43:50,099 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407634033] [2019-11-20 03:43:50,099 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:50,149 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:43:50,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:50,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 03:43:50,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:50,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-11-20 03:43:50,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:50,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 43] total 53 [2019-11-20 03:43:50,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35921554] [2019-11-20 03:43:50,186 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-20 03:43:50,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:50,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-20 03:43:50,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 03:43:50,188 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand 53 states. [2019-11-20 03:43:50,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:50,505 INFO L93 Difference]: Finished difference Result 148 states and 159 transitions. [2019-11-20 03:43:50,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-20 03:43:50,506 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 105 [2019-11-20 03:43:50,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:50,507 INFO L225 Difference]: With dead ends: 148 [2019-11-20 03:43:50,507 INFO L226 Difference]: Without dead ends: 126 [2019-11-20 03:43:50,508 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2019-11-20 03:43:50,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-20 03:43:50,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2019-11-20 03:43:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-11-20 03:43:50,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2019-11-20 03:43:50,515 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 105 [2019-11-20 03:43:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:50,516 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2019-11-20 03:43:50,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-20 03:43:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2019-11-20 03:43:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-11-20 03:43:50,518 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:50,518 INFO L410 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:50,721 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:50,721 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -227664360, now seen corresponding path program 9 times [2019-11-20 03:43:50,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:50,722 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391269369] [2019-11-20 03:43:50,722 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:52,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:52,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391269369] [2019-11-20 03:43:52,359 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807362836] [2019-11-20 03:43:52,359 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:52,421 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-20 03:43:52,421 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:52,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 03:43:52,425 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:52,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 861 proven. 100 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-20 03:43:52,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:52,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 13] total 63 [2019-11-20 03:43:52,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270607883] [2019-11-20 03:43:52,453 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-20 03:43:52,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:52,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-20 03:43:52,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 03:43:52,455 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand 63 states. [2019-11-20 03:43:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:52,800 INFO L93 Difference]: Finished difference Result 132 states and 133 transitions. [2019-11-20 03:43:52,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-20 03:43:52,800 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 125 [2019-11-20 03:43:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:52,801 INFO L225 Difference]: With dead ends: 132 [2019-11-20 03:43:52,801 INFO L226 Difference]: Without dead ends: 129 [2019-11-20 03:43:52,803 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2019-11-20 03:43:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-11-20 03:43:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2019-11-20 03:43:52,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2019-11-20 03:43:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2019-11-20 03:43:52,808 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2019-11-20 03:43:52,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:52,809 INFO L462 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2019-11-20 03:43:52,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-20 03:43:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2019-11-20 03:43:52,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-11-20 03:43:52,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:52,810 INFO L410 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:53,013 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:53,014 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:53,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:53,014 INFO L82 PathProgramCache]: Analyzing trace with hash 250343698, now seen corresponding path program 10 times [2019-11-20 03:43:53,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:53,014 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399772391] [2019-11-20 03:43:53,014 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:54,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399772391] [2019-11-20 03:43:54,568 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509274514] [2019-11-20 03:43:54,569 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:54,620 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:43:54,620 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:54,622 INFO L255 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-20 03:43:54,625 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:54,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:54,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:54,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2019-11-20 03:43:54,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556431192] [2019-11-20 03:43:54,668 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-11-20 03:43:54,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-11-20 03:43:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-11-20 03:43:54,671 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 64 states. [2019-11-20 03:43:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:54,943 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2019-11-20 03:43:54,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-11-20 03:43:54,943 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 127 [2019-11-20 03:43:54,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:54,944 INFO L225 Difference]: With dead ends: 134 [2019-11-20 03:43:54,944 INFO L226 Difference]: Without dead ends: 131 [2019-11-20 03:43:54,945 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2019-11-20 03:43:54,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-11-20 03:43:54,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2019-11-20 03:43:54,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-20 03:43:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-11-20 03:43:54,951 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2019-11-20 03:43:54,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:54,951 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-11-20 03:43:54,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-11-20 03:43:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-11-20 03:43:54,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-11-20 03:43:54,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:54,953 INFO L410 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:55,166 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:55,166 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:55,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:55,166 INFO L82 PathProgramCache]: Analyzing trace with hash 54586764, now seen corresponding path program 11 times [2019-11-20 03:43:55,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:55,166 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041025613] [2019-11-20 03:43:55,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:55,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:43:56,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:43:56,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041025613] [2019-11-20 03:43:56,864 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117868982] [2019-11-20 03:43:56,864 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/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 [2019-11-20 03:43:56,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2019-11-20 03:43:56,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:43:56,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-20 03:43:56,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:43:57,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 676 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-11-20 03:43:57,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:43:57,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 29] total 79 [2019-11-20 03:43:57,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034228365] [2019-11-20 03:43:57,701 INFO L442 AbstractCegarLoop]: Interpolant automaton has 79 states [2019-11-20 03:43:57,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:43:57,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2019-11-20 03:43:57,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-11-20 03:43:57,704 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 79 states. [2019-11-20 03:43:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:43:58,032 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2019-11-20 03:43:58,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-11-20 03:43:58,032 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 129 [2019-11-20 03:43:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:43:58,033 INFO L225 Difference]: With dead ends: 164 [2019-11-20 03:43:58,033 INFO L226 Difference]: Without dead ends: 161 [2019-11-20 03:43:58,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2019-11-20 03:43:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2019-11-20 03:43:58,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2019-11-20 03:43:58,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2019-11-20 03:43:58,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2019-11-20 03:43:58,041 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 129 [2019-11-20 03:43:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:43:58,041 INFO L462 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2019-11-20 03:43:58,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 79 states. [2019-11-20 03:43:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2019-11-20 03:43:58,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-11-20 03:43:58,043 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:43:58,043 INFO L410 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:43:58,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:43:58,243 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:43:58,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:43:58,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1986515790, now seen corresponding path program 12 times [2019-11-20 03:43:58,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:43:58,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851487309] [2019-11-20 03:43:58,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:43:58,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:00,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:00,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851487309] [2019-11-20 03:44:00,659 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664259998] [2019-11-20 03:44:00,659 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:00,759 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2019-11-20 03:44:00,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:00,760 INFO L255 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-20 03:44:00,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1089 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-11-20 03:44:01,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:01,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 36] total 86 [2019-11-20 03:44:01,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360018663] [2019-11-20 03:44:01,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 86 states [2019-11-20 03:44:01,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:01,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2019-11-20 03:44:01,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-11-20 03:44:01,173 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand 86 states. [2019-11-20 03:44:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:01,528 INFO L93 Difference]: Finished difference Result 178 states and 185 transitions. [2019-11-20 03:44:01,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2019-11-20 03:44:01,528 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 159 [2019-11-20 03:44:01,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:01,530 INFO L225 Difference]: With dead ends: 178 [2019-11-20 03:44:01,530 INFO L226 Difference]: Without dead ends: 175 [2019-11-20 03:44:01,533 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2019-11-20 03:44:01,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-11-20 03:44:01,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2019-11-20 03:44:01,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2019-11-20 03:44:01,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2019-11-20 03:44:01,539 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 159 [2019-11-20 03:44:01,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:01,540 INFO L462 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2019-11-20 03:44:01,540 INFO L463 AbstractCegarLoop]: Interpolant automaton has 86 states. [2019-11-20 03:44:01,540 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2019-11-20 03:44:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-11-20 03:44:01,541 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:01,541 INFO L410 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:01,744 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:01,745 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:01,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:01,745 INFO L82 PathProgramCache]: Analyzing trace with hash -305421432, now seen corresponding path program 13 times [2019-11-20 03:44:01,745 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:01,746 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637828942] [2019-11-20 03:44:01,746 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:04,674 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:04,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637828942] [2019-11-20 03:44:04,674 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644433268] [2019-11-20 03:44:04,674 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:04,735 INFO L255 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-20 03:44:04,737 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:04,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:04,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:04,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2019-11-20 03:44:04,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169376633] [2019-11-20 03:44:04,785 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-11-20 03:44:04,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:04,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-11-20 03:44:04,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 03:44:04,788 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand 87 states. [2019-11-20 03:44:05,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:05,133 INFO L93 Difference]: Finished difference Result 180 states and 181 transitions. [2019-11-20 03:44:05,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-11-20 03:44:05,146 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 173 [2019-11-20 03:44:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:05,147 INFO L225 Difference]: With dead ends: 180 [2019-11-20 03:44:05,147 INFO L226 Difference]: Without dead ends: 177 [2019-11-20 03:44:05,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2019-11-20 03:44:05,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-20 03:44:05,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2019-11-20 03:44:05,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2019-11-20 03:44:05,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2019-11-20 03:44:05,155 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2019-11-20 03:44:05,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:05,156 INFO L462 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2019-11-20 03:44:05,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-11-20 03:44:05,156 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2019-11-20 03:44:05,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-11-20 03:44:05,158 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:05,158 INFO L410 BasicCegarLoop]: trace histogram [76, 41, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:05,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:05,361 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:05,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:05,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1459758462, now seen corresponding path program 14 times [2019-11-20 03:44:05,362 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:05,362 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971175184] [2019-11-20 03:44:05,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:08,446 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971175184] [2019-11-20 03:44:08,447 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719230261] [2019-11-20 03:44:08,447 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:08,505 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:44:08,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:08,507 INFO L255 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-20 03:44:08,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:08,577 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:08,577 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2019-11-20 03:44:08,578 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175302609] [2019-11-20 03:44:08,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-11-20 03:44:08,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:08,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-11-20 03:44:08,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-11-20 03:44:08,580 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand 88 states. [2019-11-20 03:44:08,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:08,916 INFO L93 Difference]: Finished difference Result 182 states and 183 transitions. [2019-11-20 03:44:08,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-11-20 03:44:08,916 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 175 [2019-11-20 03:44:08,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:08,917 INFO L225 Difference]: With dead ends: 182 [2019-11-20 03:44:08,917 INFO L226 Difference]: Without dead ends: 179 [2019-11-20 03:44:08,918 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2019-11-20 03:44:08,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-11-20 03:44:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-11-20 03:44:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-11-20 03:44:08,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2019-11-20 03:44:08,924 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2019-11-20 03:44:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:08,925 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2019-11-20 03:44:08,925 INFO L463 AbstractCegarLoop]: Interpolant automaton has 88 states. [2019-11-20 03:44:08,925 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2019-11-20 03:44:08,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-11-20 03:44:08,927 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:08,927 INFO L410 BasicCegarLoop]: trace histogram [77, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:09,130 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:09,130 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:09,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1618885372, now seen corresponding path program 15 times [2019-11-20 03:44:09,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:09,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579589420] [2019-11-20 03:44:09,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:09,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:12,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:12,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579589420] [2019-11-20 03:44:12,625 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575873433] [2019-11-20 03:44:12,626 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:12,737 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 74 check-sat command(s) [2019-11-20 03:44:12,737 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:12,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-20 03:44:12,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 2993 proven. 1296 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-20 03:44:12,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:12,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 39] total 89 [2019-11-20 03:44:12,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656215590] [2019-11-20 03:44:12,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-11-20 03:44:12,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-11-20 03:44:12,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-11-20 03:44:12,774 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 89 states. [2019-11-20 03:44:13,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:13,079 INFO L93 Difference]: Finished difference Result 184 states and 185 transitions. [2019-11-20 03:44:13,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2019-11-20 03:44:13,079 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 177 [2019-11-20 03:44:13,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:13,080 INFO L225 Difference]: With dead ends: 184 [2019-11-20 03:44:13,080 INFO L226 Difference]: Without dead ends: 181 [2019-11-20 03:44:13,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2019-11-20 03:44:13,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-20 03:44:13,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2019-11-20 03:44:13,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-11-20 03:44:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2019-11-20 03:44:13,087 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2019-11-20 03:44:13,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:13,087 INFO L462 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2019-11-20 03:44:13,087 INFO L463 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-11-20 03:44:13,087 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2019-11-20 03:44:13,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2019-11-20 03:44:13,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:13,089 INFO L410 BasicCegarLoop]: trace histogram [78, 41, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:13,292 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:13,293 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:13,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:13,293 INFO L82 PathProgramCache]: Analyzing trace with hash 963142902, now seen corresponding path program 16 times [2019-11-20 03:44:13,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:13,293 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328319452] [2019-11-20 03:44:13,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:13,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:16,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328319452] [2019-11-20 03:44:16,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548857176] [2019-11-20 03:44:16,530 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:16,594 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:44:16,594 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:16,596 INFO L255 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 89 conjunts are in the unsatisfiable core [2019-11-20 03:44:16,598 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:16,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:16,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:16,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2019-11-20 03:44:16,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116928531] [2019-11-20 03:44:16,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 90 states [2019-11-20 03:44:16,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:16,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2019-11-20 03:44:16,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-11-20 03:44:16,646 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand 90 states. [2019-11-20 03:44:16,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:16,981 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2019-11-20 03:44:16,981 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2019-11-20 03:44:16,981 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 179 [2019-11-20 03:44:16,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:16,982 INFO L225 Difference]: With dead ends: 186 [2019-11-20 03:44:16,982 INFO L226 Difference]: Without dead ends: 183 [2019-11-20 03:44:16,983 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2019-11-20 03:44:16,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-11-20 03:44:16,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 182. [2019-11-20 03:44:16,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2019-11-20 03:44:16,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2019-11-20 03:44:16,989 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2019-11-20 03:44:16,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:16,989 INFO L462 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2019-11-20 03:44:16,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 90 states. [2019-11-20 03:44:16,990 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2019-11-20 03:44:16,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-20 03:44:16,991 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:16,992 INFO L410 BasicCegarLoop]: trace histogram [79, 41, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:17,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:17,195 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:17,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:17,195 INFO L82 PathProgramCache]: Analyzing trace with hash -2140145552, now seen corresponding path program 17 times [2019-11-20 03:44:17,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:17,196 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190743537] [2019-11-20 03:44:17,196 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:20,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:20,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190743537] [2019-11-20 03:44:20,595 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079458942] [2019-11-20 03:44:20,595 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:20,709 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 80 check-sat command(s) [2019-11-20 03:44:20,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:20,710 INFO L255 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 42 conjunts are in the unsatisfiable core [2019-11-20 03:44:20,712 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 3160 proven. 1521 refuted. 0 times theorem prover too weak. 1560 trivial. 0 not checked. [2019-11-20 03:44:20,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:20,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 42] total 92 [2019-11-20 03:44:20,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230657668] [2019-11-20 03:44:20,850 INFO L442 AbstractCegarLoop]: Interpolant automaton has 92 states [2019-11-20 03:44:20,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:20,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2019-11-20 03:44:20,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-20 03:44:20,852 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand 92 states. [2019-11-20 03:44:21,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:21,349 INFO L93 Difference]: Finished difference Result 190 states and 192 transitions. [2019-11-20 03:44:21,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2019-11-20 03:44:21,350 INFO L78 Accepts]: Start accepts. Automaton has 92 states. Word has length 181 [2019-11-20 03:44:21,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:21,351 INFO L225 Difference]: With dead ends: 190 [2019-11-20 03:44:21,351 INFO L226 Difference]: Without dead ends: 187 [2019-11-20 03:44:21,352 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2019-11-20 03:44:21,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-11-20 03:44:21,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2019-11-20 03:44:21,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-20 03:44:21,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2019-11-20 03:44:21,358 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 181 [2019-11-20 03:44:21,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:21,358 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2019-11-20 03:44:21,359 INFO L463 AbstractCegarLoop]: Interpolant automaton has 92 states. [2019-11-20 03:44:21,359 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2019-11-20 03:44:21,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2019-11-20 03:44:21,360 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:21,360 INFO L410 BasicCegarLoop]: trace histogram [81, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:21,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:21,560 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:21,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:21,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1382163484, now seen corresponding path program 18 times [2019-11-20 03:44:21,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:21,561 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124198407] [2019-11-20 03:44:21,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:25,185 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124198407] [2019-11-20 03:44:25,186 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610843846] [2019-11-20 03:44:25,186 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:25,343 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 82 check-sat command(s) [2019-11-20 03:44:25,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:25,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 92 conjunts are in the unsatisfiable core [2019-11-20 03:44:25,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:25,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:25,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:25,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2019-11-20 03:44:25,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092268571] [2019-11-20 03:44:25,396 INFO L442 AbstractCegarLoop]: Interpolant automaton has 93 states [2019-11-20 03:44:25,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:25,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2019-11-20 03:44:25,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-20 03:44:25,398 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand 93 states. [2019-11-20 03:44:25,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:25,745 INFO L93 Difference]: Finished difference Result 192 states and 193 transitions. [2019-11-20 03:44:25,745 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2019-11-20 03:44:25,745 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 185 [2019-11-20 03:44:25,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:25,746 INFO L225 Difference]: With dead ends: 192 [2019-11-20 03:44:25,746 INFO L226 Difference]: Without dead ends: 189 [2019-11-20 03:44:25,747 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2019-11-20 03:44:25,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2019-11-20 03:44:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2019-11-20 03:44:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2019-11-20 03:44:25,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2019-11-20 03:44:25,752 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2019-11-20 03:44:25,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:25,752 INFO L462 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2019-11-20 03:44:25,753 INFO L463 AbstractCegarLoop]: Interpolant automaton has 93 states. [2019-11-20 03:44:25,753 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2019-11-20 03:44:25,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2019-11-20 03:44:25,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:25,754 INFO L410 BasicCegarLoop]: trace histogram [82, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:25,954 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:25,954 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:25,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:25,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1121752098, now seen corresponding path program 19 times [2019-11-20 03:44:25,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:25,955 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908151198] [2019-11-20 03:44:25,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:25,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:29,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:29,433 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908151198] [2019-11-20 03:44:29,434 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848798008] [2019-11-20 03:44:29,434 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:29,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 93 conjunts are in the unsatisfiable core [2019-11-20 03:44:29,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:29,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:29,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:29,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2019-11-20 03:44:29,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652756808] [2019-11-20 03:44:29,581 INFO L442 AbstractCegarLoop]: Interpolant automaton has 94 states [2019-11-20 03:44:29,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:29,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2019-11-20 03:44:29,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-20 03:44:29,582 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand 94 states. [2019-11-20 03:44:29,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:29,941 INFO L93 Difference]: Finished difference Result 194 states and 195 transitions. [2019-11-20 03:44:29,941 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2019-11-20 03:44:29,941 INFO L78 Accepts]: Start accepts. Automaton has 94 states. Word has length 187 [2019-11-20 03:44:29,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:29,943 INFO L225 Difference]: With dead ends: 194 [2019-11-20 03:44:29,943 INFO L226 Difference]: Without dead ends: 191 [2019-11-20 03:44:29,943 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2019-11-20 03:44:29,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-11-20 03:44:29,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2019-11-20 03:44:29,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2019-11-20 03:44:29,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2019-11-20 03:44:29,949 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2019-11-20 03:44:29,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:29,949 INFO L462 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2019-11-20 03:44:29,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 94 states. [2019-11-20 03:44:29,950 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2019-11-20 03:44:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-20 03:44:29,950 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:29,951 INFO L410 BasicCegarLoop]: trace histogram [83, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:30,155 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:30,155 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash 25486680, now seen corresponding path program 20 times [2019-11-20 03:44:30,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:30,155 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075985885] [2019-11-20 03:44:30,155 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:33,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:33,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075985885] [2019-11-20 03:44:33,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609881008] [2019-11-20 03:44:33,514 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:33,581 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:44:33,581 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:33,583 INFO L255 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 94 conjunts are in the unsatisfiable core [2019-11-20 03:44:33,585 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:33,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:33,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2019-11-20 03:44:33,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220669716] [2019-11-20 03:44:33,639 INFO L442 AbstractCegarLoop]: Interpolant automaton has 95 states [2019-11-20 03:44:33,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:33,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2019-11-20 03:44:33,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-20 03:44:33,641 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand 95 states. [2019-11-20 03:44:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:34,204 INFO L93 Difference]: Finished difference Result 196 states and 197 transitions. [2019-11-20 03:44:34,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2019-11-20 03:44:34,204 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 189 [2019-11-20 03:44:34,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:34,205 INFO L225 Difference]: With dead ends: 196 [2019-11-20 03:44:34,206 INFO L226 Difference]: Without dead ends: 193 [2019-11-20 03:44:34,206 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2019-11-20 03:44:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2019-11-20 03:44:34,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2019-11-20 03:44:34,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2019-11-20 03:44:34,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2019-11-20 03:44:34,212 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2019-11-20 03:44:34,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:34,212 INFO L462 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2019-11-20 03:44:34,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 95 states. [2019-11-20 03:44:34,213 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2019-11-20 03:44:34,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-11-20 03:44:34,214 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:34,214 INFO L410 BasicCegarLoop]: trace histogram [84, 43, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:34,417 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:34,417 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:34,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:34,417 INFO L82 PathProgramCache]: Analyzing trace with hash -1284642734, now seen corresponding path program 21 times [2019-11-20 03:44:34,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:34,418 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41269050] [2019-11-20 03:44:34,418 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:38,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41269050] [2019-11-20 03:44:38,021 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256628795] [2019-11-20 03:44:38,021 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:38,162 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 85 check-sat command(s) [2019-11-20 03:44:38,162 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:38,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-20 03:44:38,166 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:38,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:38,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2019-11-20 03:44:38,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356946580] [2019-11-20 03:44:38,223 INFO L442 AbstractCegarLoop]: Interpolant automaton has 96 states [2019-11-20 03:44:38,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:38,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2019-11-20 03:44:38,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-11-20 03:44:38,224 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand 96 states. [2019-11-20 03:44:38,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:38,590 INFO L93 Difference]: Finished difference Result 198 states and 199 transitions. [2019-11-20 03:44:38,591 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2019-11-20 03:44:38,591 INFO L78 Accepts]: Start accepts. Automaton has 96 states. Word has length 191 [2019-11-20 03:44:38,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:38,592 INFO L225 Difference]: With dead ends: 198 [2019-11-20 03:44:38,592 INFO L226 Difference]: Without dead ends: 195 [2019-11-20 03:44:38,592 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2019-11-20 03:44:38,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-20 03:44:38,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2019-11-20 03:44:38,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2019-11-20 03:44:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2019-11-20 03:44:38,598 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2019-11-20 03:44:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:38,599 INFO L462 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2019-11-20 03:44:38,599 INFO L463 AbstractCegarLoop]: Interpolant automaton has 96 states. [2019-11-20 03:44:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2019-11-20 03:44:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2019-11-20 03:44:38,600 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:38,600 INFO L410 BasicCegarLoop]: trace histogram [85, 44, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:38,804 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:38,804 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:38,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:38,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1893591860, now seen corresponding path program 22 times [2019-11-20 03:44:38,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:38,805 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983222419] [2019-11-20 03:44:38,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:38,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:42,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:42,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983222419] [2019-11-20 03:44:42,405 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059305767] [2019-11-20 03:44:42,405 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:42,473 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:44:42,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:42,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 96 conjunts are in the unsatisfiable core [2019-11-20 03:44:42,479 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:42,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:42,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2019-11-20 03:44:42,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106146716] [2019-11-20 03:44:42,533 INFO L442 AbstractCegarLoop]: Interpolant automaton has 97 states [2019-11-20 03:44:42,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:42,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2019-11-20 03:44:42,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-11-20 03:44:42,534 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand 97 states. [2019-11-20 03:44:42,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:42,895 INFO L93 Difference]: Finished difference Result 200 states and 201 transitions. [2019-11-20 03:44:42,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2019-11-20 03:44:42,895 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 193 [2019-11-20 03:44:42,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:42,896 INFO L225 Difference]: With dead ends: 200 [2019-11-20 03:44:42,896 INFO L226 Difference]: Without dead ends: 197 [2019-11-20 03:44:42,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2019-11-20 03:44:42,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2019-11-20 03:44:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2019-11-20 03:44:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-11-20 03:44:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2019-11-20 03:44:42,902 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2019-11-20 03:44:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:42,903 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2019-11-20 03:44:42,903 INFO L463 AbstractCegarLoop]: Interpolant automaton has 97 states. [2019-11-20 03:44:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2019-11-20 03:44:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2019-11-20 03:44:42,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:42,904 INFO L410 BasicCegarLoop]: trace histogram [86, 45, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:43,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:43,109 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:43,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:43,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1316817606, now seen corresponding path program 23 times [2019-11-20 03:44:43,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:43,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591196544] [2019-11-20 03:44:43,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:46,740 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591196544] [2019-11-20 03:44:46,741 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883876764] [2019-11-20 03:44:46,741 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:46,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 87 check-sat command(s) [2019-11-20 03:44:46,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:46,874 INFO L255 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 48 conjunts are in the unsatisfiable core [2019-11-20 03:44:46,875 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:46,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 3731 proven. 2025 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-20 03:44:46,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:46,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 48] total 98 [2019-11-20 03:44:46,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539413786] [2019-11-20 03:44:46,915 INFO L442 AbstractCegarLoop]: Interpolant automaton has 98 states [2019-11-20 03:44:46,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:46,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2019-11-20 03:44:46,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-11-20 03:44:46,916 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand 98 states. [2019-11-20 03:44:47,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:47,320 INFO L93 Difference]: Finished difference Result 202 states and 203 transitions. [2019-11-20 03:44:47,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-11-20 03:44:47,321 INFO L78 Accepts]: Start accepts. Automaton has 98 states. Word has length 195 [2019-11-20 03:44:47,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:47,322 INFO L225 Difference]: With dead ends: 202 [2019-11-20 03:44:47,322 INFO L226 Difference]: Without dead ends: 199 [2019-11-20 03:44:47,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2019-11-20 03:44:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-11-20 03:44:47,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2019-11-20 03:44:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2019-11-20 03:44:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2019-11-20 03:44:47,327 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2019-11-20 03:44:47,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:47,328 INFO L462 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2019-11-20 03:44:47,328 INFO L463 AbstractCegarLoop]: Interpolant automaton has 98 states. [2019-11-20 03:44:47,328 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2019-11-20 03:44:47,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2019-11-20 03:44:47,329 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:47,329 INFO L410 BasicCegarLoop]: trace histogram [87, 46, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:47,533 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:47,533 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:47,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:47,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1561171392, now seen corresponding path program 24 times [2019-11-20 03:44:47,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:47,533 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948779174] [2019-11-20 03:44:47,533 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:47,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:51,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948779174] [2019-11-20 03:44:51,337 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125012598] [2019-11-20 03:44:51,337 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:51,482 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 87 check-sat command(s) [2019-11-20 03:44:51,482 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:44:51,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 49 conjunts are in the unsatisfiable core [2019-11-20 03:44:51,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 3813 proven. 2116 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-11-20 03:44:51,521 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:51,521 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 49] total 99 [2019-11-20 03:44:51,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150181705] [2019-11-20 03:44:51,522 INFO L442 AbstractCegarLoop]: Interpolant automaton has 99 states [2019-11-20 03:44:51,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:51,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2019-11-20 03:44:51,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-20 03:44:51,523 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand 99 states. [2019-11-20 03:44:51,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:51,897 INFO L93 Difference]: Finished difference Result 204 states and 205 transitions. [2019-11-20 03:44:51,897 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2019-11-20 03:44:51,898 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 197 [2019-11-20 03:44:51,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:51,899 INFO L225 Difference]: With dead ends: 204 [2019-11-20 03:44:51,899 INFO L226 Difference]: Without dead ends: 201 [2019-11-20 03:44:51,899 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2019-11-20 03:44:51,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2019-11-20 03:44:51,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2019-11-20 03:44:51,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-20 03:44:51,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2019-11-20 03:44:51,905 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2019-11-20 03:44:51,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:51,905 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2019-11-20 03:44:51,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 99 states. [2019-11-20 03:44:51,905 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2019-11-20 03:44:51,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2019-11-20 03:44:51,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:51,906 INFO L410 BasicCegarLoop]: trace histogram [88, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:52,107 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:52,107 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:52,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:52,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1349659846, now seen corresponding path program 25 times [2019-11-20 03:44:52,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:52,108 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905313201] [2019-11-20 03:44:52,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:55,811 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:55,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905313201] [2019-11-20 03:44:55,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353624168] [2019-11-20 03:44:55,811 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:44:55,879 INFO L255 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-20 03:44:55,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:44:55,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:44:55,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:44:55,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2019-11-20 03:44:55,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326219803] [2019-11-20 03:44:55,938 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-20 03:44:55,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:44:55,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-20 03:44:55,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-20 03:44:55,940 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand 100 states. [2019-11-20 03:44:56,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:44:56,466 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2019-11-20 03:44:56,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2019-11-20 03:44:56,466 INFO L78 Accepts]: Start accepts. Automaton has 100 states. Word has length 199 [2019-11-20 03:44:56,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:44:56,468 INFO L225 Difference]: With dead ends: 206 [2019-11-20 03:44:56,468 INFO L226 Difference]: Without dead ends: 203 [2019-11-20 03:44:56,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2019-11-20 03:44:56,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-11-20 03:44:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2019-11-20 03:44:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2019-11-20 03:44:56,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2019-11-20 03:44:56,474 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2019-11-20 03:44:56,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:44:56,474 INFO L462 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2019-11-20 03:44:56,474 INFO L463 AbstractCegarLoop]: Interpolant automaton has 100 states. [2019-11-20 03:44:56,474 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2019-11-20 03:44:56,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2019-11-20 03:44:56,475 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:44:56,475 INFO L410 BasicCegarLoop]: trace histogram [89, 48, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:44:56,686 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:44:56,686 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:44:56,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:44:56,686 INFO L82 PathProgramCache]: Analyzing trace with hash 49472948, now seen corresponding path program 26 times [2019-11-20 03:44:56,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:44:56,687 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655217172] [2019-11-20 03:44:56,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:44:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:45:00,749 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:45:00,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655217172] [2019-11-20 03:45:00,749 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40091255] [2019-11-20 03:45:00,749 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:00,815 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 03:45:00,815 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:45:00,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-20 03:45:00,820 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:45:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:45:00,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:45:00,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2019-11-20 03:45:00,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681136085] [2019-11-20 03:45:00,878 INFO L442 AbstractCegarLoop]: Interpolant automaton has 101 states [2019-11-20 03:45:00,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:45:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2019-11-20 03:45:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-20 03:45:00,879 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand 101 states. [2019-11-20 03:45:01,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:45:01,273 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2019-11-20 03:45:01,273 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2019-11-20 03:45:01,273 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 201 [2019-11-20 03:45:01,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:45:01,275 INFO L225 Difference]: With dead ends: 208 [2019-11-20 03:45:01,275 INFO L226 Difference]: Without dead ends: 205 [2019-11-20 03:45:01,275 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2019-11-20 03:45:01,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-11-20 03:45:01,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2019-11-20 03:45:01,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-11-20 03:45:01,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2019-11-20 03:45:01,279 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2019-11-20 03:45:01,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:45:01,279 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2019-11-20 03:45:01,280 INFO L463 AbstractCegarLoop]: Interpolant automaton has 101 states. [2019-11-20 03:45:01,280 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2019-11-20 03:45:01,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2019-11-20 03:45:01,281 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:45:01,281 INFO L410 BasicCegarLoop]: trace histogram [90, 49, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:45:01,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:01,484 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:45:01,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:45:01,484 INFO L82 PathProgramCache]: Analyzing trace with hash 291324334, now seen corresponding path program 27 times [2019-11-20 03:45:01,484 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:45:01,484 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116874644] [2019-11-20 03:45:01,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:45:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:45:05,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:45:05,460 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116874644] [2019-11-20 03:45:05,461 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143335039] [2019-11-20 03:45:05,461 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:05,628 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 91 check-sat command(s) [2019-11-20 03:45:05,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:45:05,632 INFO L255 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 101 conjunts are in the unsatisfiable core [2019-11-20 03:45:05,634 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:45:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 03:45:05,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:45:05,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2019-11-20 03:45:05,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564101710] [2019-11-20 03:45:05,691 INFO L442 AbstractCegarLoop]: Interpolant automaton has 102 states [2019-11-20 03:45:05,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:45:05,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2019-11-20 03:45:05,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-20 03:45:05,693 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand 102 states. [2019-11-20 03:45:06,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:45:06,149 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2019-11-20 03:45:06,149 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-11-20 03:45:06,149 INFO L78 Accepts]: Start accepts. Automaton has 102 states. Word has length 203 [2019-11-20 03:45:06,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:45:06,150 INFO L225 Difference]: With dead ends: 209 [2019-11-20 03:45:06,151 INFO L226 Difference]: Without dead ends: 206 [2019-11-20 03:45:06,151 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2019-11-20 03:45:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2019-11-20 03:45:06,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2019-11-20 03:45:06,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2019-11-20 03:45:06,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2019-11-20 03:45:06,156 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2019-11-20 03:45:06,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:45:06,156 INFO L462 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2019-11-20 03:45:06,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 102 states. [2019-11-20 03:45:06,156 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2019-11-20 03:45:06,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2019-11-20 03:45:06,157 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:45:06,158 INFO L410 BasicCegarLoop]: trace histogram [91, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:45:06,358 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:06,358 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:45:06,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:45:06,358 INFO L82 PathProgramCache]: Analyzing trace with hash 782272296, now seen corresponding path program 28 times [2019-11-20 03:45:06,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:45:06,359 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338474882] [2019-11-20 03:45:06,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:45:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:45:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2019-11-20 03:45:08,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338474882] [2019-11-20 03:45:08,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201803481] [2019-11-20 03:45:08,268 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:08,341 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-20 03:45:08,341 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 03:45:08,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 108 conjunts are in the unsatisfiable core [2019-11-20 03:45:08,346 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 03:45:08,388 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 03:45:08,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 6559 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2019-11-20 03:45:08,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 03:45:08,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2019-11-20 03:45:08,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606501387] [2019-11-20 03:45:08,539 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-20 03:45:08,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:45:08,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-20 03:45:08,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2019-11-20 03:45:08,540 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand 55 states. [2019-11-20 03:45:09,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:45:09,945 INFO L93 Difference]: Finished difference Result 212 states and 213 transitions. [2019-11-20 03:45:09,945 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-11-20 03:45:09,945 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 205 [2019-11-20 03:45:09,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:45:09,946 INFO L225 Difference]: With dead ends: 212 [2019-11-20 03:45:09,946 INFO L226 Difference]: Without dead ends: 209 [2019-11-20 03:45:09,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=113, Invalid=2967, Unknown=0, NotChecked=0, Total=3080 [2019-11-20 03:45:09,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-20 03:45:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2019-11-20 03:45:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2019-11-20 03:45:09,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2019-11-20 03:45:09,954 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2019-11-20 03:45:09,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:45:09,955 INFO L462 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2019-11-20 03:45:09,955 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-20 03:45:09,955 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2019-11-20 03:45:09,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2019-11-20 03:45:09,956 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 03:45:09,956 INFO L410 BasicCegarLoop]: trace histogram [92, 51, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 03:45:10,159 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 03:45:10,159 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 03:45:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 03:45:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash 136861218, now seen corresponding path program 29 times [2019-11-20 03:45:10,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 03:45:10,160 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269941134] [2019-11-20 03:45:10,160 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 03:45:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 03:45:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 6742 proven. 0 refuted. 0 times theorem prover too weak. 1722 trivial. 0 not checked. [2019-11-20 03:45:11,656 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269941134] [2019-11-20 03:45:11,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 03:45:11,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2019-11-20 03:45:11,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398428185] [2019-11-20 03:45:11,656 INFO L442 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-11-20 03:45:11,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 03:45:11,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-11-20 03:45:11,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-20 03:45:11,659 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand 52 states. [2019-11-20 03:45:11,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 03:45:11,881 INFO L93 Difference]: Finished difference Result 208 states and 209 transitions. [2019-11-20 03:45:11,882 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-11-20 03:45:11,882 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 207 [2019-11-20 03:45:11,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 03:45:11,882 INFO L225 Difference]: With dead ends: 208 [2019-11-20 03:45:11,882 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 03:45:11,883 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2019-11-20 03:45:11,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 03:45:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 03:45:11,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 03:45:11,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 03:45:11,884 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 207 [2019-11-20 03:45:11,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 03:45:11,884 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 03:45:11,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-11-20 03:45:11,884 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 03:45:11,885 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 03:45:11,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 03:45:13,059 WARN L191 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 307 DAG size of output: 307 [2019-11-20 03:45:13,114 INFO L440 ceAbstractionStarter]: At program point L118(lines 56 119) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 8) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L44(lines 44 143) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L69(lines 69 80) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 191) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L12(lines 12 208) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L440 ceAbstractionStarter]: At program point L202(lines 14 203) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 1) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L62(lines 62 107) no Hoare annotation was computed. [2019-11-20 03:45:13,114 INFO L440 ceAbstractionStarter]: At program point L178(lines 26 179) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 3) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,114 INFO L444 ceAbstractionStarter]: For program point L38(lines 38 155) no Hoare annotation was computed. [2019-11-20 03:45:13,115 INFO L440 ceAbstractionStarter]: At program point L154(lines 38 155) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 5) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,115 INFO L444 ceAbstractionStarter]: For program point L14(lines 14 203) no Hoare annotation was computed. [2019-11-20 03:45:13,115 INFO L440 ceAbstractionStarter]: At program point L130(lines 50 131) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 7) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,115 INFO L444 ceAbstractionStarter]: For program point L89(lines 89 98) no Hoare annotation was computed. [2019-11-20 03:45:13,115 INFO L444 ceAbstractionStarter]: For program point L56(lines 56 119) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L440 ceAbstractionStarter]: At program point L106(lines 62 107) the Hoare annotation is: (or (and (<= 92 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 92) (<= 92 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 92)) (and (<= 56 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 56) (<= 56 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 56)) (and (<= ULTIMATE.start_main_~main__y~0 58) (<= 58 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 58) (<= 58 ULTIMATE.start_main_~main__y~0)) (and (<= 74 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 74) (<= 74 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 74)) (and (<= 51 ULTIMATE.start_main_~main__x~0) (<= 51 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 51) (<= ULTIMATE.start_main_~main__y~0 51)) (and (<= ULTIMATE.start_main_~main__y~0 75) (<= 75 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 75) (<= 75 ULTIMATE.start_main_~main__x~0)) (and (<= 88 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 88) (<= ULTIMATE.start_main_~main__y~0 88) (<= 88 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 69) (<= 69 ULTIMATE.start_main_~main__x~0) (<= 69 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 69)) (and (<= ULTIMATE.start_main_~main__x~0 95) (<= 95 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 95) (<= 95 ULTIMATE.start_main_~main__y~0)) (and (<= 90 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 90) (<= 90 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 90)) (and (<= 68 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 68) (<= 68 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 68)) (and (<= ULTIMATE.start_main_~main__y~0 97) (<= 97 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 97) (<= 97 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__y~0 85) (<= ULTIMATE.start_main_~main__x~0 85) (<= 85 ULTIMATE.start_main_~main__y~0) (<= 85 ULTIMATE.start_main_~main__x~0)) (and (<= 91 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 91) (<= ULTIMATE.start_main_~main__y~0 91) (<= 91 ULTIMATE.start_main_~main__y~0)) (and (<= 71 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 71) (<= ULTIMATE.start_main_~main__x~0 71) (<= 71 ULTIMATE.start_main_~main__y~0)) (and (<= 83 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 83) (<= 83 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 83)) (and (<= ULTIMATE.start_main_~main__y~0 93) (<= 93 ULTIMATE.start_main_~main__x~0) (<= 93 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 93)) (and (<= 89 ULTIMATE.start_main_~main__x~0) (<= 89 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 89) (<= ULTIMATE.start_main_~main__x~0 89)) (and (<= ULTIMATE.start_main_~main__y~0 84) (<= 84 ULTIMATE.start_main_~main__y~0) (<= 84 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 84)) (and (<= 80 ULTIMATE.start_main_~main__y~0) (<= 80 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 80) (<= ULTIMATE.start_main_~main__y~0 80)) (and (<= 100 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 100) (<= 100 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 70) (<= ULTIMATE.start_main_~main__y~0 70) (<= 70 ULTIMATE.start_main_~main__y~0) (<= 70 ULTIMATE.start_main_~main__x~0)) (and (<= 79 ULTIMATE.start_main_~main__x~0) (<= 79 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 79) (<= ULTIMATE.start_main_~main__y~0 79)) (and (<= ULTIMATE.start_main_~main__y~0 65) (<= 65 ULTIMATE.start_main_~main__x~0) (<= 65 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 65)) (and (<= 82 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 82) (<= 82 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 82)) (and (<= 94 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 94) (<= 94 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 94)) (and (<= ULTIMATE.start_main_~main__x~0 67) (<= 67 ULTIMATE.start_main_~main__y~0) (<= 67 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 67)) (and (<= 72 ULTIMATE.start_main_~main__y~0) (<= 72 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 72) (<= ULTIMATE.start_main_~main__y~0 72)) (and (<= 78 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 78) (<= 78 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 78)) (and (<= ULTIMATE.start_main_~main__y~0 86) (<= 86 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 86) (<= 86 ULTIMATE.start_main_~main__y~0)) (and (<= ULTIMATE.start_main_~main__x~0 96) (<= 96 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 96) (<= 96 ULTIMATE.start_main_~main__x~0)) (and (<= 60 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 60) (<= 60 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 60)) (and (<= 52 ULTIMATE.start_main_~main__y~0) (<= 52 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 52) (<= ULTIMATE.start_main_~main__x~0 52)) (and (<= 99 ULTIMATE.start_main_~main__x~0) (<= 99 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 99) (<= ULTIMATE.start_main_~main__y~0 99)) (and (<= ULTIMATE.start_main_~main__x~0 63) (<= ULTIMATE.start_main_~main__y~0 63) (<= 63 ULTIMATE.start_main_~main__x~0) (<= 63 ULTIMATE.start_main_~main__y~0)) (and (<= 53 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 53) (<= ULTIMATE.start_main_~main__x~0 53) (<= 53 ULTIMATE.start_main_~main__x~0)) (and (<= 62 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 62) (<= 62 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 62)) (and (<= 64 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 64) (<= 64 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 64)) (and (<= 81 ULTIMATE.start_main_~main__x~0) (<= 81 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 81) (<= ULTIMATE.start_main_~main__x~0 81)) (and (<= ULTIMATE.start_main_~main__x~0 55) (<= 55 ULTIMATE.start_main_~main__x~0) (<= 55 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 55)) (and (<= ULTIMATE.start_main_~main__y~0 66) (<= 66 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 66) (<= 66 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__x~0 50) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) (and (<= 59 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 59) (<= ULTIMATE.start_main_~main__x~0 59) (<= 59 ULTIMATE.start_main_~main__x~0)) (and (<= ULTIMATE.start_main_~main__y~0 98) (<= 98 ULTIMATE.start_main_~main__x~0) (<= 98 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 98)) (and (<= 54 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 54) (<= 54 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 54)) (and (<= ULTIMATE.start_main_~main__y~0 73) (<= 73 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 73) (<= 73 ULTIMATE.start_main_~main__y~0)) (and (<= 77 ULTIMATE.start_main_~main__y~0) (<= 77 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 77) (<= ULTIMATE.start_main_~main__y~0 77)) (and (<= 57 ULTIMATE.start_main_~main__x~0) (<= 57 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 57) (<= ULTIMATE.start_main_~main__y~0 57)) (and (<= ULTIMATE.start_main_~main__x~0 61) (<= 61 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__y~0 61) (<= 61 ULTIMATE.start_main_~main__y~0)) (and (<= 76 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 76) (<= 76 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 76)) (and (<= 87 ULTIMATE.start_main_~main__y~0) (<= 87 ULTIMATE.start_main_~main__x~0) (<= ULTIMATE.start_main_~main__x~0 87) (<= ULTIMATE.start_main_~main__y~0 87))) [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point L32(lines 32 167) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 91) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L440 ceAbstractionStarter]: At program point L190(lines 20 191) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 2) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point L91(line 91) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L444 ceAbstractionStarter]: For program point L50(lines 50 131) no Hoare annotation was computed. [2019-11-20 03:45:13,116 INFO L447 ceAbstractionStarter]: At program point L207(lines 8 209) the Hoare annotation is: true [2019-11-20 03:45:13,117 INFO L440 ceAbstractionStarter]: At program point L166(lines 32 167) the Hoare annotation is: (and (<= ULTIMATE.start_main_~main__x~0 4) (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,117 INFO L444 ceAbstractionStarter]: For program point L26(lines 26 179) no Hoare annotation was computed. [2019-11-20 03:45:13,117 INFO L440 ceAbstractionStarter]: At program point L142(lines 44 143) the Hoare annotation is: (and (<= 50 ULTIMATE.start_main_~main__y~0) (<= ULTIMATE.start_main_~main__x~0 6) (<= ULTIMATE.start_main_~main__y~0 50)) [2019-11-20 03:45:13,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 03:45:13 BoogieIcfgContainer [2019-11-20 03:45:13,148 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 03:45:13,148 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 03:45:13,148 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 03:45:13,148 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 03:45:13,149 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 03:43:41" (3/4) ... [2019-11-20 03:45:13,157 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 03:45:13,166 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2019-11-20 03:45:13,167 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 03:45:13,213 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_70614044-a163-4eab-87a1-d0d4b6106036/bin/uautomizer/witness.graphml [2019-11-20 03:45:13,213 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 03:45:13,215 INFO L168 Benchmark]: Toolchain (without parser) took 92570.08 ms. Allocated memory was 1.0 GB in the beginning and 1.6 GB in the end (delta: 533.7 MB). Free memory was 944.7 MB in the beginning and 854.0 MB in the end (delta: 90.8 MB). Peak memory consumption was 624.5 MB. Max. memory is 11.5 GB. [2019-11-20 03:45:13,215 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:45:13,215 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -190.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. [2019-11-20 03:45:13,216 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:45:13,216 INFO L168 Benchmark]: Boogie Preprocessor took 19.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 03:45:13,216 INFO L168 Benchmark]: RCFGBuilder took 322.21 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. [2019-11-20 03:45:13,217 INFO L168 Benchmark]: TraceAbstraction took 91828.01 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 393.7 MB). Free memory was 1.1 GB in the beginning and 872.1 MB in the end (delta: 238.9 MB). Peak memory consumption was 632.6 MB. Max. memory is 11.5 GB. [2019-11-20 03:45:13,217 INFO L168 Benchmark]: Witness Printer took 65.40 ms. Allocated memory is still 1.6 GB. Free memory was 872.1 MB in the beginning and 854.0 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-20 03:45:13,219 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 298.06 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 140.0 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -190.0 MB). Peak memory consumption was 23.3 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 33.29 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 19.05 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 322.21 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: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 91828.01 ms. Allocated memory was 1.2 GB in the beginning and 1.6 GB in the end (delta: 393.7 MB). Free memory was 1.1 GB in the beginning and 872.1 MB in the end (delta: 238.9 MB). Peak memory consumption was 632.6 MB. Max. memory is 11.5 GB. * Witness Printer took 65.40 ms. Allocated memory is still 1.6 GB. Free memory was 872.1 MB in the beginning and 854.0 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 91]: 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 - InvariantResult [Line: 8]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: (main__x <= 1 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 38]: Loop Invariant Derived loop invariant: (main__x <= 5 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 62]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((92 <= main__y && main__y <= 92) && 92 <= main__x) && main__x <= 92) || (((56 <= main__y && main__x <= 56) && 56 <= main__x) && main__y <= 56)) || (((main__y <= 58 && 58 <= main__x) && main__x <= 58) && 58 <= main__y)) || (((74 <= main__y && main__y <= 74) && 74 <= main__x) && main__x <= 74)) || (((51 <= main__x && 51 <= main__y) && main__x <= 51) && main__y <= 51)) || (((main__y <= 75 && 75 <= main__y) && main__x <= 75) && 75 <= main__x)) || (((88 <= main__x && main__x <= 88) && main__y <= 88) && 88 <= main__y)) || (((main__y <= 69 && 69 <= main__x) && 69 <= main__y) && main__x <= 69)) || (((main__x <= 95 && 95 <= main__x) && main__y <= 95) && 95 <= main__y)) || (((90 <= main__y && main__x <= 90) && 90 <= main__x) && main__y <= 90)) || (((68 <= main__y && main__x <= 68) && 68 <= main__x) && main__y <= 68)) || (((main__y <= 97 && 97 <= main__x) && main__x <= 97) && 97 <= main__y)) || (((main__y <= 85 && main__x <= 85) && 85 <= main__y) && 85 <= main__x)) || (((91 <= main__x && main__x <= 91) && main__y <= 91) && 91 <= main__y)) || (((71 <= main__x && main__y <= 71) && main__x <= 71) && 71 <= main__y)) || (((83 <= main__x && main__y <= 83) && 83 <= main__y) && main__x <= 83)) || (((main__y <= 93 && 93 <= main__x) && 93 <= main__y) && main__x <= 93)) || (((89 <= main__x && 89 <= main__y) && main__y <= 89) && main__x <= 89)) || (((main__y <= 84 && 84 <= main__y) && 84 <= main__x) && main__x <= 84)) || (((80 <= main__y && 80 <= main__x) && main__x <= 80) && main__y <= 80)) || ((100 <= main__x && main__y <= 100) && 100 <= main__y)) || (((main__x <= 70 && main__y <= 70) && 70 <= main__y) && 70 <= main__x)) || (((79 <= main__x && 79 <= main__y) && main__x <= 79) && main__y <= 79)) || (((main__y <= 65 && 65 <= main__x) && 65 <= main__y) && main__x <= 65)) || (((82 <= main__y && main__y <= 82) && 82 <= main__x) && main__x <= 82)) || (((94 <= main__x && main__x <= 94) && 94 <= main__y) && main__y <= 94)) || (((main__x <= 67 && 67 <= main__y) && 67 <= main__x) && main__y <= 67)) || (((72 <= main__y && 72 <= main__x) && main__x <= 72) && main__y <= 72)) || (((78 <= main__x && main__x <= 78) && 78 <= main__y) && main__y <= 78)) || (((main__y <= 86 && 86 <= main__x) && main__x <= 86) && 86 <= main__y)) || (((main__x <= 96 && 96 <= main__y) && main__y <= 96) && 96 <= main__x)) || (((60 <= main__y && main__x <= 60) && 60 <= main__x) && main__y <= 60)) || (((52 <= main__y && 52 <= main__x) && main__y <= 52) && main__x <= 52)) || (((99 <= main__x && 99 <= main__y) && main__x <= 99) && main__y <= 99)) || (((main__x <= 63 && main__y <= 63) && 63 <= main__x) && 63 <= main__y)) || (((53 <= main__y && main__y <= 53) && main__x <= 53) && 53 <= main__x)) || (((62 <= main__x && main__x <= 62) && 62 <= main__y) && main__y <= 62)) || (((64 <= main__x && main__x <= 64) && 64 <= main__y) && main__y <= 64)) || (((81 <= main__x && 81 <= main__y) && main__y <= 81) && main__x <= 81)) || (((main__x <= 55 && 55 <= main__x) && 55 <= main__y) && main__y <= 55)) || (((main__y <= 66 && 66 <= main__y) && main__x <= 66) && 66 <= main__x)) || ((main__x <= 50 && 50 <= main__y) && main__y <= 50)) || (((59 <= main__y && main__y <= 59) && main__x <= 59) && 59 <= main__x)) || (((main__y <= 98 && 98 <= main__x) && 98 <= main__y) && main__x <= 98)) || (((54 <= main__y && main__y <= 54) && 54 <= main__x) && main__x <= 54)) || (((main__y <= 73 && 73 <= main__x) && main__x <= 73) && 73 <= main__y)) || (((77 <= main__y && 77 <= main__x) && main__x <= 77) && main__y <= 77)) || (((57 <= main__x && 57 <= main__y) && main__x <= 57) && main__y <= 57)) || (((main__x <= 61 && 61 <= main__x) && main__y <= 61) && 61 <= main__y)) || (((76 <= main__x && main__x <= 76) && 76 <= main__y) && main__y <= 76)) || (((87 <= main__y && 87 <= main__x) && main__x <= 87) && main__y <= 87) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: (main__x <= 4 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 56]: Loop Invariant Derived loop invariant: (main__x <= 8 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 26]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 3) && main__y <= 50 - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: (main__x <= 7 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (main__x <= 2 && 50 <= main__y) && main__y <= 50 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: (50 <= main__y && main__x <= 6) && main__y <= 50 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 1 error locations. Result: SAFE, OverallTime: 91.7s, OverallIterations: 34, TraceHistogramMax: 92, AutomataDifference: 10.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.2s, HoareTripleCheckerStatistics: 339 SDtfs, 2124 SDslu, 7285 SDs, 0 SdLazy, 11745 SolverSat, 1729 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6015 GetRequests, 3999 SyntacticMatches, 1 SemanticMatches, 2015 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 66.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred in iteration=33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 34 MinimizatonAttempts, 22 StatesRemovedByMinimization, 22 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 10 LocationsWithAnnotation, 10 PreInvPairs, 111 NumberOfFragments, 739 HoareAnnotationTreeSize, 10 FomulaSimplifications, 533 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 10 FomulaSimplificationsInter, 171 FormulaSimplificationTreeSizeReductionInter, 1.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 2.3s SatisfiabilityAnalysisTime, 69.6s InterpolantComputationTime, 8324 NumberOfCodeBlocks, 8244 NumberOfCodeBlocksAsserted, 825 NumberOfCheckSat, 8262 ConstructedInterpolants, 0 QuantifiedInterpolants, 4149276 SizeOfPredicates, 25 NumberOfNonLiveVariables, 9600 ConjunctsInSsa, 1600 ConjunctsInUnsatCore, 62 InterpolantComputations, 6 PerfectInterpolantSequences, 41889/262629 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...