./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF --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 fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:08:28,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:08:28,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:08:28,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:08:28,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:08:28,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:08:28,128 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:08:28,132 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:08:28,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:08:28,140 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:08:28,141 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:08:28,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:08:28,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:08:28,146 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:08:28,148 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:08:28,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:08:28,156 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:08:28,157 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:08:28,159 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:08:28,167 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:08:28,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:08:28,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:08:28,174 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:08:28,175 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:08:28,185 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:08:28,187 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:08:28,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:08:28,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:08:28,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:08:28,192 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:08:28,193 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:08:28,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:08:28,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:08:28,197 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:08:28,199 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:08:28,199 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:08:28,200 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:08:28,200 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:08:28,200 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:08:28,201 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:08:28,202 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:08:28,203 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:08:28,249 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:08:28,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:08:28,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:08:28,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:08:28,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:08:28,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:08:28,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:08:28,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:08:28,253 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:08:28,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:08:28,254 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:08:28,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:08:28,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:08:28,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:08:28,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:08:28,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:08:28,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:08:28,256 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:08:28,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:08:28,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:08:28,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:08:28,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:08:28,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:08:28,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:08:28,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:28,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:08:28,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:08:28,259 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:08:28,259 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:08:28,261 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:08:28,262 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:08:28,262 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:08:28,262 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:08:28,263 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:08:28,263 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_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fcf77da5263056f8d62c4caf3b92919690d80ef4ff864a75d0d8d1eec10bdccf [2021-11-20 06:08:28,569 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:08:28,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:08:28,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:08:28,595 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:08:28,596 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:08:28,598 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-11-20 06:08:28,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/data/c2c43c475/47fa12ad3cc54fa18929931dd057bb53/FLAG444772766 [2021-11-20 06:08:29,125 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:08:29,126 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/sv-benchmarks/c/loop-simple/nested_4.c [2021-11-20 06:08:29,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/data/c2c43c475/47fa12ad3cc54fa18929931dd057bb53/FLAG444772766 [2021-11-20 06:08:29,509 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/data/c2c43c475/47fa12ad3cc54fa18929931dd057bb53 [2021-11-20 06:08:29,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:08:29,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:08:29,516 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:29,516 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:08:29,521 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:08:29,521 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a209a10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29, skipping insertion in model container [2021-11-20 06:08:29,523 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,531 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:08:29,545 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:08:29,735 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-11-20 06:08:29,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:29,750 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:08:29,778 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-11-20 06:08:29,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:08:29,794 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:08:29,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29 WrapperNode [2021-11-20 06:08:29,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:08:29,796 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:29,796 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:08:29,796 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:08:29,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,810 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,829 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 50 [2021-11-20 06:08:29,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:08:29,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:08:29,831 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:08:29,831 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:08:29,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,853 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:08:29,854 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:08:29,854 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:08:29,855 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:08:29,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (1/1) ... [2021-11-20 06:08:29,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:08:29,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:29,910 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:08:29,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:08:29,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:08:29,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:08:29,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:08:29,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:08:30,015 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:08:30,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:08:30,127 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:08:30,134 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:08:30,135 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-20 06:08:30,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:30 BoogieIcfgContainer [2021-11-20 06:08:30,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:08:30,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:08:30,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:08:30,147 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:08:30,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:08:29" (1/3) ... [2021-11-20 06:08:30,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690993ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:30, skipping insertion in model container [2021-11-20 06:08:30,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:08:29" (2/3) ... [2021-11-20 06:08:30,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@690993ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:08:30, skipping insertion in model container [2021-11-20 06:08:30,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:30" (3/3) ... [2021-11-20 06:08:30,154 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-11-20 06:08:30,166 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:08:30,167 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:08:30,219 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:08:30,228 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:08:30,229 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:08:30,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:08:30,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,252 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:08:30,253 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,260 INFO L85 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-11-20 06:08:30,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794677573] [2021-11-20 06:08:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794677573] [2021-11-20 06:08:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794677573] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:30,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:30,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:08:30,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247717005] [2021-11-20 06:08:30,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:30,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:08:30,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:08:30,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:08:30,459 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,482 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-11-20 06:08:30,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:08:30,485 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 06:08:30,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:30,493 INFO L225 Difference]: With dead ends: 32 [2021-11-20 06:08:30,495 INFO L226 Difference]: Without dead ends: 13 [2021-11-20 06:08:30,500 INFO L932 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 [2021-11-20 06:08:30,505 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:30,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:30,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-11-20 06:08:30,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-11-20 06:08:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-11-20 06:08:30,549 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-11-20 06:08:30,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:30,549 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-11-20 06:08:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-11-20 06:08:30,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-20 06:08:30,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,551 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-20 06:08:30,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:08:30,553 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-11-20 06:08:30,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557610618] [2021-11-20 06:08:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557610618] [2021-11-20 06:08:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557610618] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:30,610 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:30,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:30,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572366530] [2021-11-20 06:08:30,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:30,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:30,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:30,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:30,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,614 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,629 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2021-11-20 06:08:30,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:30,630 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-11-20 06:08:30,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:30,631 INFO L225 Difference]: With dead ends: 24 [2021-11-20 06:08:30,631 INFO L226 Difference]: Without dead ends: 21 [2021-11-20 06:08:30,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,633 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:30,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 25 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:30,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-11-20 06:08:30,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 14. [2021-11-20 06:08:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 17 transitions. [2021-11-20 06:08:30,639 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 17 transitions. Word has length 5 [2021-11-20 06:08:30,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:30,640 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 17 transitions. [2021-11-20 06:08:30,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 17 transitions. [2021-11-20 06:08:30,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 06:08:30,641 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,641 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:30,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:08:30,642 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,643 INFO L85 PathProgramCache]: Analyzing trace with hash 270060130, now seen corresponding path program 1 times [2021-11-20 06:08:30,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901756563] [2021-11-20 06:08:30,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901756563] [2021-11-20 06:08:30,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901756563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:30,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:30,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:30,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224545768] [2021-11-20 06:08:30,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:30,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:30,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:30,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:30,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,685 INFO L87 Difference]: Start difference. First operand 14 states and 17 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,701 INFO L93 Difference]: Finished difference Result 31 states and 40 transitions. [2021-11-20 06:08:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:30,702 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 06:08:30,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:30,703 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:08:30,703 INFO L226 Difference]: Without dead ends: 20 [2021-11-20 06:08:30,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,705 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:30,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-20 06:08:30,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 15. [2021-11-20 06:08:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2021-11-20 06:08:30,711 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 8 [2021-11-20 06:08:30,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:30,712 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2021-11-20 06:08:30,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,712 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2021-11-20 06:08:30,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 06:08:30,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,713 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:30,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:08:30,714 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1248345450, now seen corresponding path program 1 times [2021-11-20 06:08:30,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144488443] [2021-11-20 06:08:30,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144488443] [2021-11-20 06:08:30,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144488443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:30,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:30,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634880472] [2021-11-20 06:08:30,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:30,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:30,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,761 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,776 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-11-20 06:08:30,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:30,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-20 06:08:30,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:30,778 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:08:30,778 INFO L226 Difference]: Without dead ends: 19 [2021-11-20 06:08:30,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,780 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:30,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-20 06:08:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-11-20 06:08:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2021-11-20 06:08:30,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2021-11-20 06:08:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:30,786 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2021-11-20 06:08:30,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,787 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2021-11-20 06:08:30,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:08:30,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,788 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:30,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:08:30,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,789 INFO L85 PathProgramCache]: Analyzing trace with hash -793045314, now seen corresponding path program 1 times [2021-11-20 06:08:30,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407061604] [2021-11-20 06:08:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407061604] [2021-11-20 06:08:30,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407061604] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:30,852 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:08:30,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 06:08:30,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802521662] [2021-11-20 06:08:30,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:30,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:08:30,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:30,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:08:30,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,855 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:30,868 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-11-20 06:08:30,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:08:30,869 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:08:30,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:30,870 INFO L225 Difference]: With dead ends: 31 [2021-11-20 06:08:30,870 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 06:08:30,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 06:08:30,872 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:30,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 24 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:30,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 06:08:30,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-20 06:08:30,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-20 06:08:30,878 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2021-11-20 06:08:30,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:30,879 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-20 06:08:30,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:30,879 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-20 06:08:30,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:08:30,880 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:30,880 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:30,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:08:30,881 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:30,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:30,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1973513092, now seen corresponding path program 1 times [2021-11-20 06:08:30,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:30,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713500007] [2021-11-20 06:08:30,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,883 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:30,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:30,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713500007] [2021-11-20 06:08:30,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713500007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:30,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054536512] [2021-11-20 06:08:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:30,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:30,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:30,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:30,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:08:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:08:31,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:31,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:31,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:31,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:31,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054536512] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:31,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:31,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-20 06:08:31,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761714649] [2021-11-20 06:08:31,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:08:31,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:31,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:08:31,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:08:31,260 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:31,292 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-11-20 06:08:31,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:08:31,293 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:08:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:31,294 INFO L225 Difference]: With dead ends: 37 [2021-11-20 06:08:31,294 INFO L226 Difference]: Without dead ends: 23 [2021-11-20 06:08:31,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:08:31,297 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:31,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 44 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:31,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-20 06:08:31,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-20 06:08:31,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-20 06:08:31,303 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2021-11-20 06:08:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:31,304 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-20 06:08:31,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-20 06:08:31,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 06:08:31,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:31,306 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:31,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:31,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:31,526 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:31,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:31,527 INFO L85 PathProgramCache]: Analyzing trace with hash -430063434, now seen corresponding path program 2 times [2021-11-20 06:08:31,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:31,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641600180] [2021-11-20 06:08:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:31,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:31,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:08:31,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:31,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641600180] [2021-11-20 06:08:31,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641600180] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:31,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669255755] [2021-11-20 06:08:31,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:08:31,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:31,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:31,578 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:08:31,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:08:31,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:08:31,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:31,711 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:31,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:31,783 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:08:31,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669255755] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:31,784 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:31,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2021-11-20 06:08:31,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199830876] [2021-11-20 06:08:31,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:31,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 06:08:31,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:31,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 06:08:31,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:08:31,787 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:31,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:32,000 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2021-11-20 06:08:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-20 06:08:32,000 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 06:08:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:32,004 INFO L225 Difference]: With dead ends: 76 [2021-11-20 06:08:32,005 INFO L226 Difference]: Without dead ends: 56 [2021-11-20 06:08:32,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-11-20 06:08:32,011 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:32,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 30 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:08:32,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-20 06:08:32,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 42. [2021-11-20 06:08:32,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-20 06:08:32,039 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 22 [2021-11-20 06:08:32,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:32,039 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-20 06:08:32,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,040 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-20 06:08:32,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 06:08:32,042 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:32,042 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:08:32,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:32,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:08:32,270 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash -340835222, now seen corresponding path program 3 times [2021-11-20 06:08:32,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:32,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503156182] [2021-11-20 06:08:32,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:32,272 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:32,357 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-11-20 06:08:32,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503156182] [2021-11-20 06:08:32,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503156182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:32,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949002322] [2021-11-20 06:08:32,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:08:32,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:32,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:32,362 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:32,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:08:32,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-20 06:08:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:08:32,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 06:08:32,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2021-11-20 06:08:32,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949002322] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:32,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:32,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-11-20 06:08:32,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753014659] [2021-11-20 06:08:32,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:32,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-20 06:08:32,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:32,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-20 06:08:32,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:08:32,692 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:32,865 INFO L93 Difference]: Finished difference Result 449 states and 500 transitions. [2021-11-20 06:08:32,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:08:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-20 06:08:32,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:32,874 INFO L225 Difference]: With dead ends: 449 [2021-11-20 06:08:32,874 INFO L226 Difference]: Without dead ends: 410 [2021-11-20 06:08:32,876 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:08:32,881 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 200 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:32,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 53 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:08:32,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-20 06:08:32,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 282. [2021-11-20 06:08:32,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 1.103202846975089) internal successors, (310), 281 states have internal predecessors, (310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2021-11-20 06:08:32,928 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 41 [2021-11-20 06:08:32,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:32,928 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2021-11-20 06:08:32,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:32,929 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2021-11-20 06:08:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-11-20 06:08:32,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:32,950 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 06:08:32,981 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-20 06:08:33,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:33,173 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:33,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:33,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1674088742, now seen corresponding path program 4 times [2021-11-20 06:08:33,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:33,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434170457] [2021-11-20 06:08:33,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:33,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-11-20 06:08:33,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:33,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434170457] [2021-11-20 06:08:33,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434170457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:33,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089858664] [2021-11-20 06:08:33,469 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:08:33,469 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:33,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:33,478 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:33,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:08:33,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:08:33,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:33,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:08:33,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-11-20 06:08:34,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:34,591 INFO L134 CoverageAnalysis]: Checked inductivity of 11282 backedges. 2486 proven. 89 refuted. 0 times theorem prover too weak. 8707 trivial. 0 not checked. [2021-11-20 06:08:34,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089858664] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:34,591 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:34,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-20 06:08:34,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918145104] [2021-11-20 06:08:34,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:34,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:08:34,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:34,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:08:34,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:08:34,595 INFO L87 Difference]: Start difference. First operand 282 states and 310 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:34,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:34,662 INFO L93 Difference]: Finished difference Result 1009 states and 1126 transitions. [2021-11-20 06:08:34,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:08:34,662 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 281 [2021-11-20 06:08:34,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:34,667 INFO L225 Difference]: With dead ends: 1009 [2021-11-20 06:08:34,668 INFO L226 Difference]: Without dead ends: 762 [2021-11-20 06:08:34,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:08:34,674 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 36 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:34,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 43 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:34,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-11-20 06:08:34,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 762. [2021-11-20 06:08:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 761 states have (on average 1.0801576872536136) internal successors, (822), 761 states have internal predecessors, (822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 822 transitions. [2021-11-20 06:08:34,763 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 822 transitions. Word has length 281 [2021-11-20 06:08:34,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:34,765 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 822 transitions. [2021-11-20 06:08:34,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:34,765 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 822 transitions. [2021-11-20 06:08:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2021-11-20 06:08:34,794 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:34,795 INFO L514 BasicCegarLoop]: trace histogram [288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 06:08:34,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:35,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:35,010 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:35,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:35,010 INFO L85 PathProgramCache]: Analyzing trace with hash 388372774, now seen corresponding path program 5 times [2021-11-20 06:08:35,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:35,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726977093] [2021-11-20 06:08:35,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:35,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:35,625 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 37783 proven. 3149 refuted. 0 times theorem prover too weak. 59454 trivial. 0 not checked. [2021-11-20 06:08:35,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726977093] [2021-11-20 06:08:35,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726977093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:35,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023359462] [2021-11-20 06:08:35,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 06:08:35,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:35,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:35,631 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:35,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:08:35,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 83 check-sat command(s) [2021-11-20 06:08:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:35,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:08:35,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:37,004 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2021-11-20 06:08:37,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:08:38,233 INFO L134 CoverageAnalysis]: Checked inductivity of 100386 backedges. 62974 proven. 3149 refuted. 0 times theorem prover too weak. 34263 trivial. 0 not checked. [2021-11-20 06:08:38,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023359462] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:08:38,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 06:08:38,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-11-20 06:08:38,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920939638] [2021-11-20 06:08:38,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 06:08:38,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:08:38,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:38,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:08:38,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:08:38,249 INFO L87 Difference]: Start difference. First operand 762 states and 822 transitions. Second operand has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:38,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:38,409 INFO L93 Difference]: Finished difference Result 2822 states and 3055 transitions. [2021-11-20 06:08:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:08:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 761 [2021-11-20 06:08:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:38,428 INFO L225 Difference]: With dead ends: 2822 [2021-11-20 06:08:38,428 INFO L226 Difference]: Without dead ends: 2250 [2021-11-20 06:08:38,431 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1525 GetRequests, 1518 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:08:38,431 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:38,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 62 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:08:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2021-11-20 06:08:38,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2250. [2021-11-20 06:08:38,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2250 states, 2249 states have (on average 1.0769230769230769) internal successors, (2422), 2249 states have internal predecessors, (2422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2250 states to 2250 states and 2422 transitions. [2021-11-20 06:08:38,589 INFO L78 Accepts]: Start accepts. Automaton has 2250 states and 2422 transitions. Word has length 761 [2021-11-20 06:08:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:38,591 INFO L470 AbstractCegarLoop]: Abstraction has 2250 states and 2422 transitions. [2021-11-20 06:08:38,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.0) internal successors, (72), 9 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 2250 states and 2422 transitions. [2021-11-20 06:08:38,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2250 [2021-11-20 06:08:38,680 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:08:38,681 INFO L514 BasicCegarLoop]: trace histogram [864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-11-20 06:08:38,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:38,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:08:38,883 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:08:38,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:08:38,883 INFO L85 PathProgramCache]: Analyzing trace with hash 994878758, now seen corresponding path program 6 times [2021-11-20 06:08:38,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:08:38,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379096523] [2021-11-20 06:08:38,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:08:38,884 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:08:40,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:08:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 0 proven. 679846 refuted. 0 times theorem prover too weak. 225492 trivial. 0 not checked. [2021-11-20 06:08:42,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:08:42,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379096523] [2021-11-20 06:08:42,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379096523] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:08:42,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170554176] [2021-11-20 06:08:42,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 06:08:42,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:08:42,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:08:42,448 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:08:42,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:08:44,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 377 check-sat command(s) [2021-11-20 06:08:44,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:08:44,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-20 06:08:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:08:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 905338 backedges. 356105 proven. 0 refuted. 0 times theorem prover too weak. 549233 trivial. 0 not checked. [2021-11-20 06:08:48,384 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:08:48,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170554176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:08:48,385 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:08:48,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [7] total 19 [2021-11-20 06:08:48,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903741939] [2021-11-20 06:08:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:08:48,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 06:08:48,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:08:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 06:08:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:08:48,390 INFO L87 Difference]: Start difference. First operand 2250 states and 2422 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:48,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:08:48,552 INFO L93 Difference]: Finished difference Result 2250 states and 2422 transitions. [2021-11-20 06:08:48,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:08:48,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 2249 [2021-11-20 06:08:48,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:08:48,557 INFO L225 Difference]: With dead ends: 2250 [2021-11-20 06:08:48,558 INFO L226 Difference]: Without dead ends: 0 [2021-11-20 06:08:48,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2255 GetRequests, 2238 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-11-20 06:08:48,561 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 7 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:08:48,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 9 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:08:48,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-20 06:08:48,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-20 06:08:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:48,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-20 06:08:48,564 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 2249 [2021-11-20 06:08:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:08:48,565 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-20 06:08:48,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:08:48,565 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-20 06:08:48,565 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-20 06:08:48,568 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 06:08:48,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:08:48,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:08:48,788 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-11-20 06:09:35,567 WARN L227 SmtUtils]: Spent 46.76s on a formula simplification. DAG size of input: 1225 DAG size of output: 1200 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2021-11-20 06:09:59,927 WARN L227 SmtUtils]: Spent 23.43s on a formula simplification. DAG size of input: 1200 DAG size of output: 11 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2021-11-20 06:10:00,918 INFO L858 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-11-20 06:10:00,918 INFO L858 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-11-20 06:10:00,918 INFO L854 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (and (< |ULTIMATE.start_main_~a~0#1| 6) (<= 6 |ULTIMATE.start_main_~d~0#1|) (< |ULTIMATE.start_main_~d~0#1| 7) (<= 6 |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~b~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-11-20 06:10:00,919 INFO L858 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-11-20 06:10:00,920 INFO L854 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (and (< |ULTIMATE.start_main_~b~0#1| 6) (< |ULTIMATE.start_main_~a~0#1| 6) (<= 6 |ULTIMATE.start_main_~d~0#1|) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2021-11-20 06:10:00,920 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-11-20 06:10:00,920 INFO L858 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-11-20 06:10:00,920 INFO L854 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (and (< |ULTIMATE.start_main_~b~0#1| 6) (< |ULTIMATE.start_main_~a~0#1| 6) (< |ULTIMATE.start_main_~d~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 6)) [2021-11-20 06:10:00,920 INFO L861 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-11-20 06:10:00,920 INFO L858 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-11-20 06:10:00,921 INFO L854 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (<= 6 |ULTIMATE.start_main_~b~0#1|) (<= 6 |ULTIMATE.start_main_~d~0#1|) (< |ULTIMATE.start_main_~a~0#1| 7) (< |ULTIMATE.start_main_~d~0#1| 7) (<= 6 |ULTIMATE.start_main_~c~0#1|) (< |ULTIMATE.start_main_~b~0#1| 7) (< |ULTIMATE.start_main_~c~0#1| 7)) [2021-11-20 06:10:00,921 INFO L858 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-11-20 06:10:00,924 INFO L732 BasicCegarLoop]: Path program histogram: [6, 1, 1, 1, 1, 1] [2021-11-20 06:10:00,926 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 06:10:00,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 06:10:00 BoogieIcfgContainer [2021-11-20 06:10:00,943 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 06:10:00,944 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 06:10:00,944 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 06:10:00,944 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 06:10:00,945 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:08:30" (3/4) ... [2021-11-20 06:10:00,948 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-20 06:10:00,957 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-11-20 06:10:00,958 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-11-20 06:10:00,958 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-20 06:10:00,958 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-20 06:10:00,995 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 06:10:00,996 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 06:10:00,997 INFO L158 Benchmark]: Toolchain (without parser) took 91482.54ms. Allocated memory was 113.2MB in the beginning and 1.0GB in the end (delta: 891.3MB). Free memory was 76.6MB in the beginning and 396.2MB in the end (delta: -319.6MB). Peak memory consumption was 570.3MB. Max. memory is 16.1GB. [2021-11-20 06:10:00,999 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:10:01,002 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.16ms. Allocated memory is still 113.2MB. Free memory was 76.4MB in the beginning and 88.7MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 06:10:01,002 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.56ms. Allocated memory is still 113.2MB. Free memory was 88.7MB in the beginning and 87.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:10:01,003 INFO L158 Benchmark]: Boogie Preprocessor took 22.54ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 86.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 06:10:01,007 INFO L158 Benchmark]: RCFGBuilder took 282.88ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.5MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 06:10:01,008 INFO L158 Benchmark]: TraceAbstraction took 90804.64ms. Allocated memory was 113.2MB in the beginning and 1.0GB in the end (delta: 891.3MB). Free memory was 77.0MB in the beginning and 399.4MB in the end (delta: -322.4MB). Peak memory consumption was 783.2MB. Max. memory is 16.1GB. [2021-11-20 06:10:01,012 INFO L158 Benchmark]: Witness Printer took 51.89ms. Allocated memory is still 1.0GB. Free memory was 399.4MB in the beginning and 396.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 06:10:01,016 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 113.2MB. Free memory is still 92.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.16ms. Allocated memory is still 113.2MB. Free memory was 76.4MB in the beginning and 88.7MB in the end (delta: -12.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.56ms. Allocated memory is still 113.2MB. Free memory was 88.7MB in the beginning and 87.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.54ms. Allocated memory is still 113.2MB. Free memory was 87.5MB in the beginning and 86.5MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 282.88ms. Allocated memory is still 113.2MB. Free memory was 86.5MB in the beginning and 77.5MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 90804.64ms. Allocated memory was 113.2MB in the beginning and 1.0GB in the end (delta: 891.3MB). Free memory was 77.0MB in the beginning and 399.4MB in the end (delta: -322.4MB). Peak memory consumption was 783.2MB. Max. memory is 16.1GB. * Witness Printer took 51.89ms. Allocated memory is still 1.0GB. Free memory was 399.4MB in the beginning and 396.2MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 90.7s, OverallIterations: 11, TraceHistogramMax: 864, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.2s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 72.1s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 368 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 368 mSDsluCounter, 358 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 214 mSDsCounter, 78 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 229 IncrementalHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 78 mSolverCounterUnsat, 144 mSDtfsCounter, 229 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4547 GetRequests, 4472 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=2250occurred in iteration=10, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 11 MinimizatonAttempts, 158 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 1215 NumberOfFragments, 71 HoareAnnotationTreeSize, 5 FomulaSimplifications, 24691 FormulaSimplificationTreeSizeReduction, 47.7s HoareSimplificationTime, 5 FomulaSimplificationsInter, 31128 FormulaSimplificationTreeSizeReductionInter, 24.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.4s SsaConstructionTime, 3.5s SatisfiabilityAnalysisTime, 11.2s InterpolantComputationTime, 6783 NumberOfCodeBlocks, 5313 NumberOfCodeBlocksAsserted, 477 NumberOfCheckSat, 7882 ConstructedInterpolants, 0 QuantifiedInterpolants, 15625 SizeOfPredicates, 4 NumberOfNonLiveVariables, 3210 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 22 InterpolantComputations, 6 PerfectInterpolantSequences, 1456645/2146244 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((b < 6 && a < 6) && d < 7) && c < 6 - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((a < 6 && 6 <= d) && d < 7) && 6 <= c) && b < 7) && c < 7 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((((6 <= b && 6 <= d) && a < 7) && d < 7) && 6 <= c) && b < 7) && c < 7 - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: (((b < 6 && a < 6) && 6 <= d) && d < 7) && c < 7 RESULT: Ultimate proved your program to be correct! [2021-11-20 06:10:01,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e1745ac8-861c-4622-b01a-820ba2d6c87c/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE