./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_3.c -s /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e63f4150318242871d0ac34a0d1b61fbf23907ae .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 22:07:00,783 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 22:07:00,787 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 22:07:00,870 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 22:07:00,872 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 22:07:00,878 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 22:07:00,883 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 22:07:00,888 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 22:07:00,892 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 22:07:00,899 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 22:07:00,901 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 22:07:00,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 22:07:00,904 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 22:07:00,908 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 22:07:00,910 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 22:07:00,913 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 22:07:00,915 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 22:07:00,916 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 22:07:00,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 22:07:00,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 22:07:00,936 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 22:07:00,938 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 22:07:00,941 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 22:07:00,942 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 22:07:00,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 22:07:00,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 22:07:00,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 22:07:00,957 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 22:07:00,958 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 22:07:00,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 22:07:00,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 22:07:00,962 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 22:07:00,964 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 22:07:00,966 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 22:07:00,967 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 22:07:00,968 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 22:07:00,969 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 22:07:00,969 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 22:07:00,969 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 22:07:00,971 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 22:07:00,973 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 22:07:00,977 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 22:07:01,024 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 22:07:01,024 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 22:07:01,027 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 22:07:01,027 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 22:07:01,027 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 22:07:01,028 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 22:07:01,028 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 22:07:01,028 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 22:07:01,028 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 22:07:01,029 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 22:07:01,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 22:07:01,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 22:07:01,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 22:07:01,031 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 22:07:01,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 22:07:01,032 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 22:07:01,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 22:07:01,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 22:07:01,033 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 22:07:01,033 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 22:07:01,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 22:07:01,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 22:07:01,034 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 22:07:01,034 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 22:07:01,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 22:07:01,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 22:07:01,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 22:07:01,035 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 22:07:01,035 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 22:07:01,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e63f4150318242871d0ac34a0d1b61fbf23907ae [2020-11-29 22:07:01,440 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 22:07:01,484 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 22:07:01,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 22:07:01,491 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 22:07:01,492 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 22:07:01,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/../../sv-benchmarks/c/loop-simple/nested_3.c [2020-11-29 22:07:01,609 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/data/25862b70c/5b63f417b9624b6387653ea8b8eaea04/FLAGbb2cea5da [2020-11-29 22:07:02,257 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 22:07:02,258 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/sv-benchmarks/c/loop-simple/nested_3.c [2020-11-29 22:07:02,266 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/data/25862b70c/5b63f417b9624b6387653ea8b8eaea04/FLAGbb2cea5da [2020-11-29 22:07:02,642 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/data/25862b70c/5b63f417b9624b6387653ea8b8eaea04 [2020-11-29 22:07:02,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 22:07:02,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 22:07:02,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 22:07:02,650 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 22:07:02,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 22:07:02,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:02,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc18667 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02, skipping insertion in model container [2020-11-29 22:07:02,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:02,668 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 22:07:02,684 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 22:07:02,882 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:07:02,902 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 22:07:02,928 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 22:07:02,945 INFO L208 MainTranslator]: Completed translation [2020-11-29 22:07:02,946 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02 WrapperNode [2020-11-29 22:07:02,946 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 22:07:02,948 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 22:07:02,948 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 22:07:02,948 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 22:07:02,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:02,974 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:02,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 22:07:03,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 22:07:03,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 22:07:03,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 22:07:03,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,019 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,025 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... [2020-11-29 22:07:03,027 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 22:07:03,028 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 22:07:03,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 22:07:03,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 22:07:03,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 22:07:03,115 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 22:07:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 22:07:03,115 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 22:07:03,599 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 22:07:03,599 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 22:07:03,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:07:03 BoogieIcfgContainer [2020-11-29 22:07:03,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 22:07:03,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 22:07:03,604 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 22:07:03,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 22:07:03,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 10:07:02" (1/3) ... [2020-11-29 22:07:03,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338848b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:07:03, skipping insertion in model container [2020-11-29 22:07:03,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 10:07:02" (2/3) ... [2020-11-29 22:07:03,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3338848b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 10:07:03, skipping insertion in model container [2020-11-29 22:07:03,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:07:03" (3/3) ... [2020-11-29 22:07:03,613 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_3.c [2020-11-29 22:07:03,628 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 22:07:03,634 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 22:07:03,648 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 22:07:03,689 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 22:07:03,690 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 22:07:03,691 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 22:07:03,691 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 22:07:03,691 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 22:07:03,692 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 22:07:03,692 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 22:07:03,692 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 22:07:03,710 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states. [2020-11-29 22:07:03,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 22:07:03,716 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:03,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 22:07:03,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:03,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:03,728 INFO L82 PathProgramCache]: Analyzing trace with hash 28726596, now seen corresponding path program 1 times [2020-11-29 22:07:03,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:03,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228109245] [2020-11-29 22:07:03,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:03,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:03,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:03,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228109245] [2020-11-29 22:07:03,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:07:03,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 22:07:03,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740512542] [2020-11-29 22:07:03,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 22:07:03,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:03,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 22:07:03,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:07:03,978 INFO L87 Difference]: Start difference. First operand 15 states. Second operand 2 states. [2020-11-29 22:07:04,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:04,001 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2020-11-29 22:07:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 22:07:04,003 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-11-29 22:07:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:04,016 INFO L225 Difference]: With dead ends: 28 [2020-11-29 22:07:04,016 INFO L226 Difference]: Without dead ends: 11 [2020-11-29 22:07:04,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 22:07:04,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-29 22:07:04,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 22:07:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 22:07:04,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2020-11-29 22:07:04,081 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 5 [2020-11-29 22:07:04,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:04,082 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2020-11-29 22:07:04,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 22:07:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2020-11-29 22:07:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-29 22:07:04,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:04,085 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-29 22:07:04,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 22:07:04,086 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:04,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:04,089 INFO L82 PathProgramCache]: Analyzing trace with hash 28697766, now seen corresponding path program 1 times [2020-11-29 22:07:04,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:04,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662744636] [2020-11-29 22:07:04,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:04,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:04,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662744636] [2020-11-29 22:07:04,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:07:04,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:07:04,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763681733] [2020-11-29 22:07:04,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:07:04,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:04,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:07:04,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:07:04,224 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand 3 states. [2020-11-29 22:07:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:04,273 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-11-29 22:07:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:07:04,275 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-29 22:07:04,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:04,276 INFO L225 Difference]: With dead ends: 20 [2020-11-29 22:07:04,276 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 22:07:04,277 INFO L677 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 [2020-11-29 22:07:04,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 22:07:04,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 12. [2020-11-29 22:07:04,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 22:07:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2020-11-29 22:07:04,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 5 [2020-11-29 22:07:04,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:04,282 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2020-11-29 22:07:04,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:07:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2020-11-29 22:07:04,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 22:07:04,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:04,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:07:04,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 22:07:04,288 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash 269702254, now seen corresponding path program 1 times [2020-11-29 22:07:04,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:04,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830079816] [2020-11-29 22:07:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:04,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:04,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:04,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830079816] [2020-11-29 22:07:04,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:07:04,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:07:04,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674179110] [2020-11-29 22:07:04,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:07:04,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:04,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:07:04,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:07:04,349 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand 3 states. [2020-11-29 22:07:04,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:04,387 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2020-11-29 22:07:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:07:04,388 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 22:07:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:04,389 INFO L225 Difference]: With dead ends: 25 [2020-11-29 22:07:04,389 INFO L226 Difference]: Without dead ends: 16 [2020-11-29 22:07:04,390 INFO L677 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 [2020-11-29 22:07:04,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-11-29 22:07:04,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 13. [2020-11-29 22:07:04,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-29 22:07:04,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-29 22:07:04,394 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 8 [2020-11-29 22:07:04,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:04,395 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-29 22:07:04,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:07:04,395 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-29 22:07:04,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 22:07:04,396 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:04,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:07:04,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 22:07:04,396 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:04,397 INFO L82 PathProgramCache]: Analyzing trace with hash 904437762, now seen corresponding path program 1 times [2020-11-29 22:07:04,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:04,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4469710] [2020-11-29 22:07:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:04,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4469710] [2020-11-29 22:07:04,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 22:07:04,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 22:07:04,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098580100] [2020-11-29 22:07:04,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 22:07:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:04,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 22:07:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 22:07:04,476 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-29 22:07:04,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:04,513 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2020-11-29 22:07:04,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 22:07:04,514 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-11-29 22:07:04,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:04,515 INFO L225 Difference]: With dead ends: 25 [2020-11-29 22:07:04,515 INFO L226 Difference]: Without dead ends: 15 [2020-11-29 22:07:04,516 INFO L677 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 [2020-11-29 22:07:04,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-11-29 22:07:04,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2020-11-29 22:07:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-29 22:07:04,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-29 22:07:04,520 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 11 [2020-11-29 22:07:04,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:04,521 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-29 22:07:04,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 22:07:04,521 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-29 22:07:04,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 22:07:04,522 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:04,522 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:07:04,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 22:07:04,522 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:04,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:04,523 INFO L82 PathProgramCache]: Analyzing trace with hash -2012164800, now seen corresponding path program 1 times [2020-11-29 22:07:04,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:04,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396307258] [2020-11-29 22:07:04,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:04,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:04,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:04,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396307258] [2020-11-29 22:07:04,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359494465] [2020-11-29 22:07:04,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:04,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:07:04,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:04,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:04,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:07:04,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067320238] [2020-11-29 22:07:04,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:07:04,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:04,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:07:04,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:07:04,769 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 5 states. [2020-11-29 22:07:04,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:04,817 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-29 22:07:04,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:07:04,817 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 22:07:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:04,818 INFO L225 Difference]: With dead ends: 28 [2020-11-29 22:07:04,818 INFO L226 Difference]: Without dead ends: 17 [2020-11-29 22:07:04,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:07:04,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-29 22:07:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2020-11-29 22:07:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-11-29 22:07:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-11-29 22:07:04,824 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 13 [2020-11-29 22:07:04,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:04,824 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-11-29 22:07:04,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:07:04,824 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-11-29 22:07:04,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-29 22:07:04,825 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:04,825 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:07:05,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:05,051 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:05,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:05,051 INFO L82 PathProgramCache]: Analyzing trace with hash -253582594, now seen corresponding path program 2 times [2020-11-29 22:07:05,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:05,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209121605] [2020-11-29 22:07:05,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-29 22:07:05,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209121605] [2020-11-29 22:07:05,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737847628] [2020-11-29 22:07:05,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:05,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:07:05,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:05,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:07:05,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:05,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 22:07:05,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:05,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-11-29 22:07:05,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582316349] [2020-11-29 22:07:05,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:07:05,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:05,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:07:05,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:05,257 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 7 states. [2020-11-29 22:07:05,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:05,449 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2020-11-29 22:07:05,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-29 22:07:05,454 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2020-11-29 22:07:05,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:05,455 INFO L225 Difference]: With dead ends: 51 [2020-11-29 22:07:05,455 INFO L226 Difference]: Without dead ends: 38 [2020-11-29 22:07:05,456 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-11-29 22:07:05,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-29 22:07:05,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 27. [2020-11-29 22:07:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-29 22:07:05,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-29 22:07:05,472 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 15 [2020-11-29 22:07:05,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:05,478 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-29 22:07:05,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:07:05,479 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-29 22:07:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-29 22:07:05,480 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:05,480 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 22:07:05,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:05,700 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:05,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:05,700 INFO L82 PathProgramCache]: Analyzing trace with hash -311567314, now seen corresponding path program 3 times [2020-11-29 22:07:05,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:05,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656513048] [2020-11-29 22:07:05,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-29 22:07:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656513048] [2020-11-29 22:07:05,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683905199] [2020-11-29 22:07:05,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:05,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-29 22:07:05,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:05,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-29 22:07:05,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:05,865 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-11-29 22:07:05,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:05,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-11-29 22:07:05,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852017015] [2020-11-29 22:07:05,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 22:07:05,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:05,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 22:07:05,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:07:05,868 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-11-29 22:07:05,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:05,908 INFO L93 Difference]: Finished difference Result 71 states and 80 transitions. [2020-11-29 22:07:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 22:07:05,909 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 26 [2020-11-29 22:07:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:05,910 INFO L225 Difference]: With dead ends: 71 [2020-11-29 22:07:05,910 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 22:07:05,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-11-29 22:07:05,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 22:07:05,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-11-29 22:07:05,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-29 22:07:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-11-29 22:07:05,923 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 26 [2020-11-29 22:07:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:05,924 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-11-29 22:07:05,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 22:07:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-11-29 22:07:05,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-11-29 22:07:05,926 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:05,926 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:06,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:06,152 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:06,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:06,152 INFO L82 PathProgramCache]: Analyzing trace with hash -936285786, now seen corresponding path program 4 times [2020-11-29 22:07:06,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:06,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224261638] [2020-11-29 22:07:06,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:06,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:06,261 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-11-29 22:07:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224261638] [2020-11-29 22:07:06,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093533861] [2020-11-29 22:07:06,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:06,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:07:06,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:06,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:07:06,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:06,377 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 82 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2020-11-29 22:07:06,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:06,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:07:06,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636836910] [2020-11-29 22:07:06,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:07:06,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:06,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:07:06,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:06,380 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-11-29 22:07:06,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:06,433 INFO L93 Difference]: Finished difference Result 97 states and 112 transitions. [2020-11-29 22:07:06,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:07:06,434 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 47 [2020-11-29 22:07:06,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:06,435 INFO L225 Difference]: With dead ends: 97 [2020-11-29 22:07:06,436 INFO L226 Difference]: Without dead ends: 60 [2020-11-29 22:07:06,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:06,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-29 22:07:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-11-29 22:07:06,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-29 22:07:06,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2020-11-29 22:07:06,448 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 47 [2020-11-29 22:07:06,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:06,449 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2020-11-29 22:07:06,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:07:06,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2020-11-29 22:07:06,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-29 22:07:06,451 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:06,451 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:06,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:06,668 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1097513562, now seen corresponding path program 5 times [2020-11-29 22:07:06,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:06,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933691894] [2020-11-29 22:07:06,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:06,790 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 130 proven. 16 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-11-29 22:07:06,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933691894] [2020-11-29 22:07:06,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247434557] [2020-11-29 22:07:06,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:06,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-29 22:07:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:06,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:07:06,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 218 proven. 16 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2020-11-29 22:07:06,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:06,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 22:07:06,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683650497] [2020-11-29 22:07:06,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:07:06,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:06,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:07:06,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:06,914 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 8 states. [2020-11-29 22:07:06,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:06,986 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2020-11-29 22:07:06,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:07:06,988 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 55 [2020-11-29 22:07:06,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:06,989 INFO L225 Difference]: With dead ends: 111 [2020-11-29 22:07:06,991 INFO L226 Difference]: Without dead ends: 68 [2020-11-29 22:07:06,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-29 22:07:07,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2020-11-29 22:07:07,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-29 22:07:07,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 70 transitions. [2020-11-29 22:07:07,003 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 70 transitions. Word has length 55 [2020-11-29 22:07:07,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:07,004 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 70 transitions. [2020-11-29 22:07:07,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:07:07,004 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2020-11-29 22:07:07,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-11-29 22:07:07,006 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:07,007 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:07,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:07,235 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:07,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:07,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1691369894, now seen corresponding path program 6 times [2020-11-29 22:07:07,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:07,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111301559] [2020-11-29 22:07:07,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:07,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 190 proven. 25 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2020-11-29 22:07:07,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111301559] [2020-11-29 22:07:07,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283672034] [2020-11-29 22:07:07,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:07,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-29 22:07:07,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:07,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:07:07,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 491 backedges. 318 proven. 25 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-11-29 22:07:07,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:07,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:07:07,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299767296] [2020-11-29 22:07:07,546 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:07:07,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:07,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:07:07,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:07,547 INFO L87 Difference]: Start difference. First operand 64 states and 70 transitions. Second operand 9 states. [2020-11-29 22:07:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:07,621 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2020-11-29 22:07:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:07:07,622 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 63 [2020-11-29 22:07:07,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:07,624 INFO L225 Difference]: With dead ends: 121 [2020-11-29 22:07:07,624 INFO L226 Difference]: Without dead ends: 72 [2020-11-29 22:07:07,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:07,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-29 22:07:07,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-11-29 22:07:07,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-29 22:07:07,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-11-29 22:07:07,643 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 63 [2020-11-29 22:07:07,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:07,643 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-11-29 22:07:07,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:07:07,644 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-11-29 22:07:07,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-11-29 22:07:07,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:07,654 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:07,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:07,868 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:07,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:07,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1900076454, now seen corresponding path program 7 times [2020-11-29 22:07:07,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:07,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342974064] [2020-11-29 22:07:07,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:07,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:08,004 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-11-29 22:07:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342974064] [2020-11-29 22:07:08,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530335648] [2020-11-29 22:07:08,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:08,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:08,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:07:08,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:08,122 INFO L134 CoverageAnalysis]: Checked inductivity of 679 backedges. 355 proven. 89 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-11-29 22:07:08,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:08,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 22:07:08,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730927369] [2020-11-29 22:07:08,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:07:08,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:08,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:07:08,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:07:08,126 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 6 states. [2020-11-29 22:07:08,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:08,184 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2020-11-29 22:07:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:07:08,185 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-11-29 22:07:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:08,186 INFO L225 Difference]: With dead ends: 168 [2020-11-29 22:07:08,186 INFO L226 Difference]: Without dead ends: 130 [2020-11-29 22:07:08,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:07:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-29 22:07:08,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 102. [2020-11-29 22:07:08,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-29 22:07:08,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-11-29 22:07:08,207 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 71 [2020-11-29 22:07:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:08,208 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-11-29 22:07:08,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:07:08,208 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-11-29 22:07:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-11-29 22:07:08,210 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:08,210 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:08,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:08,427 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:08,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:08,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1075796806, now seen corresponding path program 8 times [2020-11-29 22:07:08,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:08,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340686371] [2020-11-29 22:07:08,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:08,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-11-29 22:07:08,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340686371] [2020-11-29 22:07:08,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30320717] [2020-11-29 22:07:08,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:08,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:07:08,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:08,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:07:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 792 proven. 264 refuted. 0 times theorem prover too weak. 482 trivial. 0 not checked. [2020-11-29 22:07:08,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:08,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:07:08,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522261017] [2020-11-29 22:07:08,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:07:08,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:08,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:07:08,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:08,792 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 7 states. [2020-11-29 22:07:08,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:08,845 INFO L93 Difference]: Finished difference Result 213 states and 231 transitions. [2020-11-29 22:07:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:07:08,846 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 101 [2020-11-29 22:07:08,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:08,848 INFO L225 Difference]: With dead ends: 213 [2020-11-29 22:07:08,848 INFO L226 Difference]: Without dead ends: 160 [2020-11-29 22:07:08,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:08,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-29 22:07:08,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 132. [2020-11-29 22:07:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-29 22:07:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 142 transitions. [2020-11-29 22:07:08,882 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 142 transitions. Word has length 101 [2020-11-29 22:07:08,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:08,885 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 142 transitions. [2020-11-29 22:07:08,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:07:08,885 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 142 transitions. [2020-11-29 22:07:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-11-29 22:07:08,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:08,897 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:09,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-29 22:07:09,119 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:09,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:09,120 INFO L82 PathProgramCache]: Analyzing trace with hash -538489946, now seen corresponding path program 9 times [2020-11-29 22:07:09,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:09,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442497623] [2020-11-29 22:07:09,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:09,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:09,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1403 proven. 526 refuted. 0 times theorem prover too weak. 816 trivial. 0 not checked. [2020-11-29 22:07:09,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442497623] [2020-11-29 22:07:09,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913702364] [2020-11-29 22:07:09,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:09,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2020-11-29 22:07:09,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:09,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:07:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:09,489 INFO L134 CoverageAnalysis]: Checked inductivity of 2745 backedges. 1404 proven. 526 refuted. 0 times theorem prover too weak. 815 trivial. 0 not checked. [2020-11-29 22:07:09,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:09,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 22:07:09,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119606315] [2020-11-29 22:07:09,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:07:09,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:09,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:07:09,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:09,492 INFO L87 Difference]: Start difference. First operand 132 states and 142 transitions. Second operand 8 states. [2020-11-29 22:07:09,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:09,551 INFO L93 Difference]: Finished difference Result 258 states and 279 transitions. [2020-11-29 22:07:09,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:07:09,552 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-11-29 22:07:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:09,554 INFO L225 Difference]: With dead ends: 258 [2020-11-29 22:07:09,554 INFO L226 Difference]: Without dead ends: 190 [2020-11-29 22:07:09,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:09,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-29 22:07:09,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 162. [2020-11-29 22:07:09,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-29 22:07:09,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 174 transitions. [2020-11-29 22:07:09,576 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 174 transitions. Word has length 131 [2020-11-29 22:07:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:09,576 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 174 transitions. [2020-11-29 22:07:09,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:07:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 174 transitions. [2020-11-29 22:07:09,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-11-29 22:07:09,579 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:09,580 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:09,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:09,803 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:09,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:09,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1069707590, now seen corresponding path program 10 times [2020-11-29 22:07:09,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:09,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412634402] [2020-11-29 22:07:09,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:09,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:10,040 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2020-11-29 22:07:10,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412634402] [2020-11-29 22:07:10,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809898395] [2020-11-29 22:07:10,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:10,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-29 22:07:10,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:10,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:07:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4300 backedges. 2188 proven. 875 refuted. 0 times theorem prover too weak. 1237 trivial. 0 not checked. [2020-11-29 22:07:10,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:10,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:07:10,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023761366] [2020-11-29 22:07:10,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:07:10,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:10,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:07:10,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:10,241 INFO L87 Difference]: Start difference. First operand 162 states and 174 transitions. Second operand 9 states. [2020-11-29 22:07:10,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:10,303 INFO L93 Difference]: Finished difference Result 275 states and 297 transitions. [2020-11-29 22:07:10,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:07:10,304 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 161 [2020-11-29 22:07:10,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:10,306 INFO L225 Difference]: With dead ends: 275 [2020-11-29 22:07:10,306 INFO L226 Difference]: Without dead ends: 192 [2020-11-29 22:07:10,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:10,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-11-29 22:07:10,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-11-29 22:07:10,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-29 22:07:10,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 206 transitions. [2020-11-29 22:07:10,362 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 206 transitions. Word has length 161 [2020-11-29 22:07:10,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:10,363 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 206 transitions. [2020-11-29 22:07:10,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:07:10,364 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 206 transitions. [2020-11-29 22:07:10,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-11-29 22:07:10,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:10,366 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2020-11-29 22:07:10,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:10,575 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:10,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:10,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1969636954, now seen corresponding path program 11 times [2020-11-29 22:07:10,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:10,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687615856] [2020-11-29 22:07:10,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2020-11-29 22:07:10,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687615856] [2020-11-29 22:07:10,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681647064] [2020-11-29 22:07:10,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:10,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 68 check-sat command(s) [2020-11-29 22:07:10,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:10,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-29 22:07:10,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6203 backedges. 0 proven. 3149 refuted. 0 times theorem prover too weak. 3054 trivial. 0 not checked. [2020-11-29 22:07:11,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:11,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-29 22:07:11,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759939376] [2020-11-29 22:07:11,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-29 22:07:11,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-29 22:07:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:07:11,047 INFO L87 Difference]: Start difference. First operand 192 states and 206 transitions. Second operand 6 states. [2020-11-29 22:07:11,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:11,099 INFO L93 Difference]: Finished difference Result 380 states and 408 transitions. [2020-11-29 22:07:11,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 22:07:11,100 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 191 [2020-11-29 22:07:11,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:11,103 INFO L225 Difference]: With dead ends: 380 [2020-11-29 22:07:11,103 INFO L226 Difference]: Without dead ends: 377 [2020-11-29 22:07:11,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-11-29 22:07:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-11-29 22:07:11,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 285. [2020-11-29 22:07:11,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-11-29 22:07:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 306 transitions. [2020-11-29 22:07:11,138 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 306 transitions. Word has length 191 [2020-11-29 22:07:11,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:11,139 INFO L481 AbstractCegarLoop]: Abstraction has 285 states and 306 transitions. [2020-11-29 22:07:11,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-29 22:07:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 306 transitions. [2020-11-29 22:07:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-11-29 22:07:11,143 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:11,144 INFO L422 BasicCegarLoop]: trace histogram [108, 108, 18, 18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2020-11-29 22:07:11,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-29 22:07:11,367 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:11,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:11,368 INFO L82 PathProgramCache]: Analyzing trace with hash -148194194, now seen corresponding path program 12 times [2020-11-29 22:07:11,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:11,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944566267] [2020-11-29 22:07:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:11,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2020-11-29 22:07:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944566267] [2020-11-29 22:07:11,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018737028] [2020-11-29 22:07:11,782 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:12,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 95 check-sat command(s) [2020-11-29 22:07:12,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:12,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 472 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-29 22:07:12,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:12,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14025 backedges. 0 proven. 9444 refuted. 0 times theorem prover too weak. 4581 trivial. 0 not checked. [2020-11-29 22:07:12,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:12,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-29 22:07:12,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923584142] [2020-11-29 22:07:12,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-29 22:07:12,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:12,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-29 22:07:12,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:12,234 INFO L87 Difference]: Start difference. First operand 285 states and 306 transitions. Second operand 7 states. [2020-11-29 22:07:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:12,298 INFO L93 Difference]: Finished difference Result 473 states and 508 transitions. [2020-11-29 22:07:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 22:07:12,299 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 284 [2020-11-29 22:07:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:12,303 INFO L225 Difference]: With dead ends: 473 [2020-11-29 22:07:12,304 INFO L226 Difference]: Without dead ends: 470 [2020-11-29 22:07:12,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-11-29 22:07:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2020-11-29 22:07:12,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 378. [2020-11-29 22:07:12,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 378 states. [2020-11-29 22:07:12,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 406 transitions. [2020-11-29 22:07:12,338 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 406 transitions. Word has length 284 [2020-11-29 22:07:12,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:12,339 INFO L481 AbstractCegarLoop]: Abstraction has 378 states and 406 transitions. [2020-11-29 22:07:12,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-29 22:07:12,339 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 406 transitions. [2020-11-29 22:07:12,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-11-29 22:07:12,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:12,347 INFO L422 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2020-11-29 22:07:12,571 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-29 22:07:12,571 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:12,572 INFO L82 PathProgramCache]: Analyzing trace with hash 382291622, now seen corresponding path program 13 times [2020-11-29 22:07:12,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:12,572 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876086636] [2020-11-29 22:07:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2020-11-29 22:07:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876086636] [2020-11-29 22:07:13,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494603881] [2020-11-29 22:07:13,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:13,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-29 22:07:13,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:13,520 INFO L134 CoverageAnalysis]: Checked inductivity of 24994 backedges. 0 proven. 18886 refuted. 0 times theorem prover too weak. 6108 trivial. 0 not checked. [2020-11-29 22:07:13,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:13,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-29 22:07:13,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721758543] [2020-11-29 22:07:13,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-29 22:07:13,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:13,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-29 22:07:13,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:13,525 INFO L87 Difference]: Start difference. First operand 378 states and 406 transitions. Second operand 8 states. [2020-11-29 22:07:13,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:13,597 INFO L93 Difference]: Finished difference Result 566 states and 608 transitions. [2020-11-29 22:07:13,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 22:07:13,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 377 [2020-11-29 22:07:13,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:13,602 INFO L225 Difference]: With dead ends: 566 [2020-11-29 22:07:13,602 INFO L226 Difference]: Without dead ends: 563 [2020-11-29 22:07:13,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-11-29 22:07:13,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-11-29 22:07:13,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 471. [2020-11-29 22:07:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 471 states. [2020-11-29 22:07:13,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 506 transitions. [2020-11-29 22:07:13,651 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 506 transitions. Word has length 377 [2020-11-29 22:07:13,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:13,652 INFO L481 AbstractCegarLoop]: Abstraction has 471 states and 506 transitions. [2020-11-29 22:07:13,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-29 22:07:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 506 transitions. [2020-11-29 22:07:13,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2020-11-29 22:07:13,664 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:13,664 INFO L422 BasicCegarLoop]: trace histogram [180, 180, 30, 30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2020-11-29 22:07:13,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-29 22:07:13,880 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:13,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:13,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841966, now seen corresponding path program 14 times [2020-11-29 22:07:13,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:13,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732037957] [2020-11-29 22:07:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:14,571 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2020-11-29 22:07:14,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732037957] [2020-11-29 22:07:14,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126186317] [2020-11-29 22:07:14,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:14,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 22:07:14,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:14,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-29 22:07:14,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:15,161 INFO L134 CoverageAnalysis]: Checked inductivity of 39110 backedges. 0 proven. 31475 refuted. 0 times theorem prover too weak. 7635 trivial. 0 not checked. [2020-11-29 22:07:15,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 22:07:15,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-29 22:07:15,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893009965] [2020-11-29 22:07:15,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 22:07:15,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:15,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 22:07:15,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:15,164 INFO L87 Difference]: Start difference. First operand 471 states and 506 transitions. Second operand 9 states. [2020-11-29 22:07:15,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:15,255 INFO L93 Difference]: Finished difference Result 567 states and 609 transitions. [2020-11-29 22:07:15,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-29 22:07:15,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 470 [2020-11-29 22:07:15,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:15,260 INFO L225 Difference]: With dead ends: 567 [2020-11-29 22:07:15,261 INFO L226 Difference]: Without dead ends: 564 [2020-11-29 22:07:15,261 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 470 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-11-29 22:07:15,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-11-29 22:07:15,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 564. [2020-11-29 22:07:15,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 564 states. [2020-11-29 22:07:15,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 606 transitions. [2020-11-29 22:07:15,313 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 606 transitions. Word has length 470 [2020-11-29 22:07:15,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:15,314 INFO L481 AbstractCegarLoop]: Abstraction has 564 states and 606 transitions. [2020-11-29 22:07:15,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 22:07:15,315 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 606 transitions. [2020-11-29 22:07:15,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2020-11-29 22:07:15,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 22:07:15,333 INFO L422 BasicCegarLoop]: trace histogram [216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2020-11-29 22:07:15,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:15,559 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 22:07:15,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 22:07:15,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1072389210, now seen corresponding path program 15 times [2020-11-29 22:07:15,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 22:07:15,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225165095] [2020-11-29 22:07:15,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 22:07:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 22:07:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 0 proven. 48558 refuted. 0 times theorem prover too weak. 7815 trivial. 0 not checked. [2020-11-29 22:07:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225165095] [2020-11-29 22:07:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12108009] [2020-11-29 22:07:16,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/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 [2020-11-29 22:07:17,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2020-11-29 22:07:17,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 22:07:17,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-29 22:07:17,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 22:07:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 56373 backedges. 16183 proven. 0 refuted. 0 times theorem prover too weak. 40190 trivial. 0 not checked. [2020-11-29 22:07:17,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-29 22:07:17,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [26] total 26 [2020-11-29 22:07:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836156319] [2020-11-29 22:07:17,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 22:07:17,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 22:07:17,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 22:07:17,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:07:17,631 INFO L87 Difference]: Start difference. First operand 564 states and 606 transitions. Second operand 11 states. [2020-11-29 22:07:17,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 22:07:17,749 INFO L93 Difference]: Finished difference Result 564 states and 606 transitions. [2020-11-29 22:07:17,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-29 22:07:17,750 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 563 [2020-11-29 22:07:17,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 22:07:17,752 INFO L225 Difference]: With dead ends: 564 [2020-11-29 22:07:17,752 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 22:07:17,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 558 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-11-29 22:07:17,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 22:07:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 22:07:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 22:07:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 22:07:17,755 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 563 [2020-11-29 22:07:17,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 22:07:17,755 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 22:07:17,755 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 22:07:17,755 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 22:07:17,755 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 22:07:17,956 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 22:07:17,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 22:07:20,797 WARN L193 SmtUtils]: Spent 2.72 s on a formula simplification. DAG size of input: 683 DAG size of output: 94 [2020-11-29 22:07:21,185 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 9 [2020-11-29 22:07:21,189 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 22:07:21,190 INFO L277 CegarLoopResult]: At program point L31(lines 15 32) the Hoare annotation is: true [2020-11-29 22:07:21,190 INFO L274 CegarLoopResult]: For program point L23-2(lines 23 25) no Hoare annotation was computed. [2020-11-29 22:07:21,190 INFO L270 CegarLoopResult]: At program point L23-3(lines 23 25) the Hoare annotation is: (and (<= ULTIMATE.start_main_~c~0 6) (<= ULTIMATE.start_main_~b~0 5) (<= ULTIMATE.start_main_~a~0 5)) [2020-11-29 22:07:21,190 INFO L274 CegarLoopResult]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2020-11-29 22:07:21,190 INFO L270 CegarLoopResult]: At program point L21-3(lines 21 27) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0) (<= ULTIMATE.start_main_~b~0 6) (< 5 ULTIMATE.start_main_~b~0)) [2020-11-29 22:07:21,190 INFO L274 CegarLoopResult]: For program point L21-4(lines 15 32) no Hoare annotation was computed. [2020-11-29 22:07:21,191 INFO L274 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-11-29 22:07:21,191 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 22:07:21,191 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 22:07:21,191 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 22:07:21,191 INFO L274 CegarLoopResult]: For program point L28(lines 28 30) no Hoare annotation was computed. [2020-11-29 22:07:21,192 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-11-29 22:07:21,192 INFO L274 CegarLoopResult]: For program point L22-2(lines 22 26) no Hoare annotation was computed. [2020-11-29 22:07:21,192 INFO L270 CegarLoopResult]: At program point L22-3(lines 22 26) the Hoare annotation is: (and (<= ULTIMATE.start_main_~c~0 6) (< 5 ULTIMATE.start_main_~c~0) (<= ULTIMATE.start_main_~b~0 6) (<= ULTIMATE.start_main_~a~0 5)) [2020-11-29 22:07:21,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 10:07:21 BoogieIcfgContainer [2020-11-29 22:07:21,215 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 22:07:21,215 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 22:07:21,215 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 22:07:21,216 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 22:07:21,216 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 10:07:03" (3/4) ... [2020-11-29 22:07:21,219 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 22:07:21,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 22:07:21,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 22:07:21,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:07:21,228 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 22:07:21,260 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_83022619-386c-42ac-a6dd-2d449cc3f3f2/bin/uautomizer/witness.graphml [2020-11-29 22:07:21,260 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 22:07:21,261 INFO L168 Benchmark]: Toolchain (without parser) took 18613.65 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 80.8 MB in the beginning and 346.0 MB in the end (delta: -265.2 MB). Peak memory consumption was 313.2 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,262 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory was 36.0 MB in the beginning and 36.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:07:21,263 INFO L168 Benchmark]: CACSL2BoogieTranslator took 296.84 ms. Allocated memory is still 111.1 MB. Free memory was 80.6 MB in the beginning and 89.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,263 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.52 ms. Allocated memory is still 111.1 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 22:07:21,264 INFO L168 Benchmark]: Boogie Preprocessor took 24.24 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 87.0 MB in the end (delta: 753.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,264 INFO L168 Benchmark]: RCFGBuilder took 573.11 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,265 INFO L168 Benchmark]: TraceAbstraction took 17611.41 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 75.1 MB in the beginning and 348.1 MB in the end (delta: -273.0 MB). Peak memory consumption was 310.0 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,265 INFO L168 Benchmark]: Witness Printer took 45.16 ms. Allocated memory is still 690.0 MB. Free memory was 348.1 MB in the beginning and 346.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 22:07:21,268 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 75.5 MB. Free memory was 36.0 MB in the beginning and 36.0 MB in the end (delta: 63.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 296.84 ms. Allocated memory is still 111.1 MB. Free memory was 80.6 MB in the beginning and 89.1 MB in the end (delta: -8.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.52 ms. Allocated memory is still 111.1 MB. Free memory was 89.1 MB in the beginning and 87.7 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.24 ms. Allocated memory is still 111.1 MB. Free memory was 87.7 MB in the beginning and 87.0 MB in the end (delta: 753.1 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 573.11 ms. Allocated memory is still 111.1 MB. Free memory was 86.4 MB in the beginning and 75.1 MB in the end (delta: 11.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 17611.41 ms. Allocated memory was 111.1 MB in the beginning and 690.0 MB in the end (delta: 578.8 MB). Free memory was 75.1 MB in the beginning and 348.1 MB in the end (delta: -273.0 MB). Peak memory consumption was 310.0 MB. Max. memory is 16.1 GB. * Witness Printer took 45.16 ms. Allocated memory is still 690.0 MB. Free memory was 348.1 MB in the beginning and 346.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((a <= 6 && c <= 6) && 5 < c) && b <= 6) && 5 < b - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((c <= 6 && 5 < c) && b <= 6) && a <= 5 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: (c <= 6 && b <= 5) && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 15 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 14.2s, OverallIterations: 19, TraceHistogramMax: 216, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 3.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 270 SDslu, 450 SDs, 0 SdLazy, 371 SolverSat, 40 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2681 GetRequests, 2569 SyntacticMatches, 6 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=564occurred in iteration=18, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 19 MinimizatonAttempts, 409 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 4 PreInvPairs, 306 NumberOfFragments, 40 HoareAnnotationTreeSize, 4 FomulaSimplifications, 83693 FormulaSimplificationTreeSizeReduction, 2.8s HoareSimplificationTime, 4 FomulaSimplificationsInter, 4208 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 1.8s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 5165 NumberOfCodeBlocks, 4619 NumberOfCodeBlocksAsserted, 293 NumberOfCheckSat, 5131 ConstructedInterpolants, 0 QuantifiedInterpolants, 4791211 SizeOfPredicates, 17 NumberOfNonLiveVariables, 3678 ConjunctsInSsa, 82 ConjunctsInUnsatCore, 34 InterpolantComputations, 5 PerfectInterpolantSequences, 124042/302125 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...